{"id":12685,"date":"2026-04-07T02:47:04","date_gmt":"2026-04-07T02:47:04","guid":{"rendered":"https:\/\/hlh-js.com\/?p=12685"},"modified":"2026-04-07T02:47:04","modified_gmt":"2026-04-07T02:47:04","slug":"aluminum-oxide-blasting-media-properties-grit-sizes-best-uses","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/de\/resource\/blog\/aluminum-oxide-blasting-media-properties-grit-sizes-best-uses\/","title":{"rendered":"Aluminum Oxide Blasting Media: Properties, Grit Sizes &amp; Best Uses"},"content":{"rendered":"<!-- ============================================================\n     JIANGSU HENGLIHONG TECHNOLOGY CO., LTD.\n     Article A-1: Aluminum Oxide Blasting Media\n     Target URL: https:\/\/hlh-js.com\/resource\/blog\/aluminum-oxide-blasting-media-properties-grit-sizes-best-uses\/\n     Last updated: April 2026\n     ============================================================ -->\n\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@graph\": [\n        {\n            \"@type\": \"Article\",\n            \"headline\": \"Aluminum Oxide Blasting Media: Properties, Grit Sizes & Best Uses\",\n            \"description\": \"Complete technical guide to aluminum oxide (alumina) abrasive blasting media \\u2014 covering Mohs hardness, grit size charts, reuse cycles, surface profile data, and industry applications. By Jiangsu Henglihong Technology Co., Ltd.\",\n            \"author\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\"\n            },\n            \"publisher\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\"\n            },\n            \"datePublished\": \"2026-04-01\",\n            \"dateModified\": \"2026-04-01\",\n            \"mainEntityOfPage\": {\n                \"@type\": \"WebPage\",\n                \"@id\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/aluminum-oxide-blasting-media-properties-grit-sizes-best-uses\\\/\"\n            }\n        },\n        {\n            \"@type\": \"BreadcrumbList\",\n            \"itemListElement\": [\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 1,\n                    \"name\": \"Home\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/\"\n                },\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 2,\n                    \"name\": \"Resources\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/\"\n                },\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 3,\n                    \"name\": \"Blog\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/\"\n                },\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 4,\n                    \"name\": \"Aluminum Oxide Blasting Media: Properties, Grit Sizes & Best Uses\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/aluminum-oxide-blasting-media-properties-grit-sizes-best-uses\\\/\"\n                }\n            ]\n        },\n        {\n            \"@type\": \"FAQPage\",\n            \"mainEntity\": [\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What is aluminum oxide blasting media?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Aluminum oxide blasting media (also called alumina or corundum) is a synthetic abrasive produced by fusing bauxite in an electric arc furnace. It rates 9 on the Mohs hardness scale, features sharp angular particles, and is widely used for surface profiling, cleaning, and preparation prior to coatings and thermal spray processes.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"How many times can aluminum oxide blast media be reused?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Under a proper reclaim and classification system, aluminum oxide abrasive blasting media can typically be reused 4 to 8 times before particle breakdown reduces its cutting efficiency to the point where replacement is needed. Actual reuse cycles depend on operating pressure, nozzle type, and the hardness of the substrate being blasted.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What grit size of aluminum oxide is best for coating preparation?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"For most industrial coating preparation (achieving Sa 2.5 cleanliness and a 40\\u201375 \\u00b5m anchor profile), aluminum oxide grit sizes between 36 and 80 are most commonly specified. Coarser grits (16\\u201324) are used for heavy mill scale removal; finer grits (100\\u2013220) are used for precision work and lighter surface conditioning.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Is aluminum oxide the same as alumina?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Yes. Aluminum oxide, alumina, and corundum all refer to the same chemical compound: Al\\u2082O\\u2083. In abrasive and blasting contexts, 'aluminum oxide' and 'alumina' are used interchangeably. 'Corundum' typically refers to the naturally occurring mineral form, while industrial blasting media is produced synthetically via the Bayer process and electric arc fusion.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What is the difference between white and brown aluminum oxide for blasting?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Brown aluminum oxide (regular alumina, Al\\u2082O\\u2083 ~95%) is produced from standard bauxite and contains small amounts of iron oxide and titania, giving it a brownish color. It is the standard workhorse for industrial blasting. White aluminum oxide (fused alumina, Al\\u2082O\\u2083 ~99.5%) is purer, slightly harder, and produces less contamination \\u2014 preferred for blasting stainless steel, non-ferrous metals, and applications where iron contamination must be avoided.\"\n                    }\n                }\n            ]\n        }\n    ]\n}<\/script>\n\n<style>\n.hlh-a1 *, .hlh-a1 *::before, .hlh-a1 *::after { box-sizing: border-box; margin: 0; padding: 0; }\n.hlh-a1 {\n  font-family: 'Segoe UI', Arial, sans-serif;\n  font-size: 16px; line-height: 1.8; color: #1a1a2e;\n  max-width: 960px; margin: 0 auto; padding: 0 16px 60px;\n}\n.hlh-a1 .hlh-hero {\n  background: linear-gradient(135deg, #1A5276 0%, #0d2d47 100%);\n  border-radius: 12px; padding: 52px 44px; margin-bottom: 48px; position: relative; overflow: hidden;\n}\n.hlh-a1 .hlh-hero::before { content:''; position:absolute; top:-60px; right:-60px; width:260px; height:260px; border-radius:50%; background:rgba(255,255,255,0.04); }\n.hlh-a1 .hlh-hero-label { display:inline-block; 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text-decoration:none; }\n.hlh-a1 .hlh-cta a:hover { background:#AED6F1; }\n.hlh-a1 .hlh-faq { margin:26px 0; }\n.hlh-a1 .hlh-faq-item { border:1px solid #D5E8F3; border-radius:8px; margin-bottom:10px; overflow:hidden; }\n.hlh-a1 .hlh-faq-q { width:100%; background:#F4F8FB; border:none; cursor:pointer; text-align:left; padding:15px 18px; font-size:15px; font-weight:600; color:#0d2d47; display:flex; justify-content:space-between; align-items:center; gap:12px; }\n.hlh-a1 .hlh-faq-q:hover { background:#EBF5FB; }\n.hlh-a1 .hlh-faq-arrow { flex-shrink:0; width:20px; height:20px; background:#1A5276; border-radius:50%; display:flex; align-items:center; justify-content:center; color:#fff; font-size:11px; transition:transform .3s; }\n.hlh-a1 .hlh-faq-item.open .hlh-faq-arrow { transform:rotate(180deg); }\n.hlh-a1 .hlh-faq-a { display:none; padding:15px 18px; font-size:14px; color:#2c3e50; line-height:1.7; border-top:1px solid #D5E8F3; background:#fff; }\n.hlh-a1 .hlh-faq-item.open .hlh-faq-a { display:block; }\n.hlh-a1 a.hlh-link { color:#1A5276; font-weight:600; text-decoration:underline; text-underline-offset:3px; }\n.hlh-a1 a.hlh-link:hover { color:#2980B9; }\n.hlh-a1 hr { border:none; border-top:1px solid #EAF0F6; margin:44px 0; }\n.hlh-a1 ul, .hlh-a1 ol { padding-left:22px; margin-bottom:18px; }\n.hlh-a1 li { margin-bottom:7px; color:#2c3e50; font-size:15px; }\n.hlh-a1 strong { color:#0d2d47; }\n@media(max-width:640px){ .hlh-a1 .hlh-hero{padding:34px 22px;} .hlh-a1 .hlh-cta{padding:30px 22px;} }\n<\/style>\n\n<div class=\"hlh-a1\">\n\n  <div class=\"hlh-hero\">\n    <div class=\"hlh-hero-label\">Media Types \u2014 In-Depth Guide<\/div>\n    <h1>Aluminum Oxide Blasting Media: Properties, Grit Sizes &amp; Best Uses<\/h1>\n    <p>A complete technical reference for aluminum oxide (alumina) abrasive blasting media \u2014 from material science and grit size selection to surface profile data, reuse cycles, and industry applications.<\/p>\n    <div class=\"hlh-hero-meta\">\n      <span>Published April 2026<\/span>\n      <span>By Jiangsu Henglihong Technology Co., Ltd.<\/span>\n      <span>~2,200 words \u00b7 10 min read<\/span>\n    <\/div>\n  <\/div>\n\n  <div class=\"hlh-toc\">\n    <div class=\"hlh-toc-title\">Table of Contents<\/div>\n    <ol>\n      <li><a href=\"#what-is\">What Is Aluminum Oxide Blasting Media?<\/a><\/li>\n      <li><a href=\"#manufacturing\">How It Is Made<\/a><\/li>\n      <li><a href=\"#properties\">Key Physical &amp; Chemical Properties<\/a><\/li>\n      <li><a href=\"#types\">Brown vs White Aluminum Oxide<\/a><\/li>\n      <li><a href=\"#grit-sizes\">Grit Size Chart &amp; Surface Profiles<\/a><\/li>\n      <li><a href=\"#reuse\">Reusability &amp; Reclaim<\/a><\/li>\n      <li><a href=\"#applications\">Industrieanwendungen<\/a><\/li>\n      <li><a href=\"#vs-others\">Aluminum Oxide vs Other Blast Media<\/a><\/li>\n      <li><a href=\"#safety\">Safety &amp; Handling<\/a><\/li>\n      <li><a href=\"#faq\">H\u00e4ufig gestellte Fragen<\/a><\/li>\n    <\/ol>\n  <\/div>\n\n  <!-- 1 -->\n  <h2 id=\"what-is\">What Is Aluminum Oxide Blasting Media?<\/h2>\n  <p class=\"hlh-lead\">Aluminum oxide blasting media \u2014 also known as alumina grit or corundum abrasive \u2014 is a synthetic, high-hardness abrasive produced from bauxite ore. It is one of the most widely used abrasive blasting materials in industrial surface finishing, valued for its combination of extreme hardness, sharp angular fracture, chemical stability, and multi-cycle reusability.<\/p>\n  <p>With a Mohs hardness of 9 \u2014 second only to diamond and cubic boron nitride among commonly available materials \u2014 aluminum oxide cuts aggressively into metals, ceramics, and composites, producing the deep anchor profiles required for high-performance coating adhesion. Its chemical formula is Al\u2082O\u2083, and its crystalline structure (corundum) gives each fractured grain a new sharp cutting edge, making it self-sharpening as it breaks down during use.<\/p>\n  <p>Aluminum oxide is the go-to choice for surface preparation before thermal spray coatings, industrial epoxy and polyurethane paint systems, powder coatings, and hard chrome plating. It is also widely used for deburring precision-machined components, cleaning castings, and conditioning tool surfaces.<\/p>\n  <p>For a broader overview of how aluminum oxide compares to all other blast media types, see the <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-complete-guide-to-types-properties-selection\/\" target=\"_blank\" rel=\"noopener\">Abrasive Blasting Media Complete Guide<\/a>.<\/p>\n\n  <!-- 2 -->\n  <h2 id=\"manufacturing\">How Aluminum Oxide Blasting Media Is Made<\/h2>\n  <p>Industrial aluminum oxide abrasive is manufactured through two primary processes:<\/p>\n  <p><strong>The Bayer Process<\/strong> first refines bauxite ore into alumina (Al\u2082O\u2083) by digesting it in hot caustic soda solution, precipitating aluminum hydroxide, and then calcining it at high temperature to produce pure alumina powder. This powder is then used as feedstock for the fusion step.<\/p>\n  <p><strong>Electric Arc Fusion<\/strong> melts the calcined alumina at temperatures exceeding 2,000 \u00b0C in a large electric arc furnace. The molten material is then cooled, crushed, and screened to the required particle size distribution. The crushing process naturally produces the sharp, angular grain morphology that gives aluminum oxide its aggressive cutting character.<\/p>\n  <p>The purity level of the starting bauxite and the control of fusion conditions determine whether the finished product is classified as brown aluminum oxide (standard grade, ~95% Al\u2082O\u2083) or white aluminum oxide (high-purity grade, ~99.5% Al\u2082O\u2083). Jiangsu Henglihong Technology manufactures both grades under ISO 9001-certified quality systems with full batch chemical analysis documentation.<\/p>\n\n  <!-- 3 -->\n  <h2 id=\"properties\">Key Physical &amp; Chemical Properties<\/h2>\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>Property<\/th><th>Brown Al\u2082O\u2083<\/th><th>White Al\u2082O\u2083<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>Chemical composition<\/td><td>Al\u2082O\u2083 ~94\u201396%<\/td><td>Al\u2082O\u2083 ~99\u201399.5%<\/td><\/tr>\n        <tr><td>Mohs hardness<\/td><td>9.0<\/td><td>9.0\u20139.2<\/td><\/tr>\n        <tr><td>Crystal structure<\/td><td>Corundum (\u03b1-Al\u2082O\u2083)<\/td><td>Corundum (\u03b1-Al\u2082O\u2083)<\/td><\/tr>\n        <tr><td>Sch\u00fcttdichte<\/td><td>1.75\u20131.95 g\/cm\u00b3<\/td><td>1.75\u20131.90 g\/cm\u00b3<\/td><\/tr>\n        <tr><td>Schmelzpunkt<\/td><td>~2,040 \u00b0C<\/td><td>~2,050 \u00b0C<\/td><\/tr>\n        <tr><td>Partikelform<\/td><td>Angular, blocky<\/td><td>Angular, slightly finer<\/td><\/tr>\n        <tr><td>Free silica content<\/td><td>&lt;1%<\/td><td>&lt;0.1%<\/td><\/tr>\n        <tr><td>Iron oxide content<\/td><td>1\u20133%<\/td><td>&lt;0.1%<\/td><\/tr>\n        <tr><td>Farbe<\/td><td>Brown \/ grey-brown<\/td><td>White \/ off-white<\/td><\/tr>\n        <tr><td>Typical reuse cycles<\/td><td>4\u20138\u00d7<\/td><td>4\u20138\u00d7<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n  <p>Key performance characteristics that make aluminum oxide particularly suitable for blasting applications include its <strong>self-sharpening fracture behavior<\/strong> (each fracture exposes a new cutting edge), its <strong>chemical inertness<\/strong> (it does not react with most metals, acids, or bases under operating conditions), and its <strong>thermal stability<\/strong> (it retains hardness at elevated temperatures, making it suitable for blasting before thermal spray processes).<\/p>\n\n  <!-- 4 -->\n  <h2 id=\"types\">Brown vs White Aluminum Oxide: Which to Choose?<\/h2>\n  <p>Both grades share the same corundum crystal structure and angular morphology, but differ in purity and consequently in specific application suitability.<\/p>\n  <div class=\"hlh-cards\">\n    <div class=\"hlh-card\">\n      <h4>Braunes Aluminiumoxid<\/h4>\n      <p>The industrial workhorse. Ideal for general steel blasting, coating preparation, deburring, and cleaning castings. The small amount of iron oxide in its composition makes it unsuitable for blasting stainless steel or non-ferrous metals where iron contamination cannot be tolerated. More cost-effective per kilogram than white grade.<\/p>\n    <\/div>\n    <div class=\"hlh-card\">\n      <h4>White Aluminum Oxide<\/h4>\n      <p>High-purity grade preferred for blasting stainless steel, titanium, aluminum alloys, and other non-ferrous substrates. Its near-zero iron content eliminates the risk of iron contamination causing rust staining or coating adhesion failure. Also preferred for precision optical, medical, and food-contact surface applications.<\/p>\n    <\/div>\n  <\/div>\n  <div class=\"hlh-box hlh-box-orange\">\n    <div class=\"hlh-box-title\">Selection Rule of Thumb<\/div>\n    <p>If the substrate is carbon steel and iron contamination is not a concern: use brown aluminum oxide \u2014 lower cost, equivalent cutting performance. If the substrate is stainless steel, non-ferrous metal, or a sensitive alloy: specify white aluminum oxide to avoid iron contamination and potential corrosion or adhesion issues downstream.<\/p>\n  <\/div>\n\n  <!-- 5 -->\n  <h2 id=\"grit-sizes\">Grit Size Chart &amp; Surface Profile Data<\/h2>\n  <p>Aluminum oxide is available in an exceptionally wide range of particle sizes \u2014 from very coarse grit 12 through ultra-fine grit 1200 \u2014 making it one of the most versatile blast media in terms of surface finish control. The table below maps grit sizes to approximate surface profile depths and typical applications. For a full cross-standard conversion (FEPA, ANSI, JIS, MESH), refer to our <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/blasting-media-grit-size-mesh-size-guide-how-to-read-convert\/\" target=\"_blank\" rel=\"noopener\">Blasting Media Grit Size &amp; Mesh Size Guide<\/a>.<\/p>\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>Grit Size (FEPA)<\/th><th>Approx. Particle Size (\u00b5m)<\/th><th>Surface Profile Ra (\u00b5m)<\/th><th>Typical Application<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>F12 \/ F16<\/td><td>1,700\u20132,360<\/td><td>100\u2013150+<\/td><td>Very heavy mill scale, severe corrosion removal<\/td><\/tr>\n        <tr><td>F24 \/ F30<\/td><td>710\u20131,180<\/td><td>75\u2013120<\/td><td>Heavy rust, thick coating removal, anchor profiles for heavy coatings<\/td><\/tr>\n        <tr><td>F36 \/ F46<\/td><td>425\u2013710<\/td><td>50\u201390<\/td><td>General industrial coating prep (Sa 2.5), thermal spray bond coats<\/td><\/tr>\n        <tr><td>F60 \/ F80<\/td><td>212\u2013425<\/td><td>30\u201360<\/td><td>Standard coating prep, precision deburring, light rust removal<\/td><\/tr>\n        <tr><td>F100 \/ F120<\/td><td>106\u2013212<\/td><td>15\u201335<\/td><td>Precision parts cleaning, pre-plating surface conditioning<\/td><\/tr>\n        <tr><td>F150 \/ F180<\/td><td>63-106<\/td><td>8\u201318<\/td><td>Satin finish preparation, fine deburring<\/td><\/tr>\n        <tr><td>F220 \/ F240<\/td><td>44\u201363<\/td><td>4\u201310<\/td><td>Fine surface conditioning, lapping prep<\/td><\/tr>\n        <tr><td>F320\u2013F1200<\/td><td>4\u201344<\/td><td>&lt;5<\/td><td>Ultra-fine finishing, optical surface prep, precision cleaning<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n  <div class=\"hlh-box hlh-box-blue\">\n    <div class=\"hlh-box-title\">Coating Prep Industry Standard<\/div>\n    <p>For most heavy industrial protective coating systems (epoxy primers, zinc-rich coatings, thermal spray), a grit size of <strong>F36 to F80<\/strong> aluminum oxide is specified, targeting a surface profile of 40\u201375 \u00b5m and a cleanliness grade of <strong>Sa 2.5<\/strong> per ISO 8501-1. Always confirm with the coating manufacturer&#8217;s technical data sheet for the exact profile requirement of the specific coating system being applied.<\/p>\n  <\/div>\n\n  <!-- 6 -->\n  <h2 id=\"reuse\">Reusability, Reclaim &amp; Cost Efficiency<\/h2>\n  <p>Aluminum oxide is a recyclable blast media, typically yielding 4 to 8 reuse cycles depending on operating conditions. This multi-cycle performance gives it a meaningful cost advantage over single-use media such as crushed coal slag or mineral sands, while still offering significantly higher cutting performance per cycle.<\/p>\n  <p>Media breakdown during blasting produces two degradation products: <strong>fines<\/strong> (sub-specification particles that no longer contribute useful blasting action) and <strong>fractured particles<\/strong> that are smaller but still angular and sharp. The fines must be removed by the reclaim system to maintain blasting efficiency; the fractured particles can continue to perform useful work until they drop below the minimum effective size for the application.<\/p>\n  <p>An effective reclaim system for aluminum oxide typically includes a <strong>bucket elevator<\/strong> to return spent media, a <strong>cyclone separator<\/strong> oder <strong>air wash classifier<\/strong> to remove fine dust and degraded particles, and a <strong>vibratory screen<\/strong> to confirm particle size distribution before the media re-enters the blast cycle. With a well-maintained reclaim system, effective per-cycle cost for aluminum oxide blasting is substantially lower than the unit purchase price per kilogram suggests.<\/p>\n  <p>For a full cost-per-cycle analysis comparing aluminum oxide against steel grit, garnet, and single-use media, see: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/reusable-vs-single-use-blasting-media-cost-analysis-roi\/\" target=\"_blank\" rel=\"noopener\">Reusable vs Single-Use Blasting Media: Cost Analysis &amp; ROI<\/a>.<\/p>\n\n  <!-- 7 -->\n  <h2 id=\"applications\">Industry Applications of Aluminum Oxide Blast Media<\/h2>\n  <h3>Thermal Spray &amp; HVOF Coating Preparation<\/h3>\n  <p>Thermal spray processes \u2014 including flame spray, arc spray, plasma spray, and HVOF (High Velocity Oxygen Fuel) \u2014 require a highly roughened substrate with a controlled anchor profile to achieve mechanical bonding of the deposited coating. Aluminum oxide grit, typically F36\u2013F60, is the dominant media for this application worldwide due to its ability to generate the required profile without embedding metallic contamination that would compromise coating adhesion.<\/p>\n\n  <h3>Industrial Protective Coating Preparation<\/h3>\n  <p>Before applying epoxy, polyurethane, zinc-rich, or other industrial protective coatings to structural steel, pipes, pressure vessels, and fabricated assemblies, the surface must be blasted to a defined cleanliness (typically Sa 2.5 or Sa 3 per ISO 8501-1) and profile depth. Aluminum oxide grit is the standard choice for operations using portable blasting equipment or blasting cabinets.<\/p>\n\n  <h3>Precision Deburring &amp; Cleaning<\/h3>\n  <p>CNC-machined components, die castings, and forged parts frequently carry burrs, flash, and surface contamination from the manufacturing process. Aluminum oxide in finer grit sizes (F80\u2013F180) is used in automated blasting cabinets to deburr and clean these components without altering critical dimensions. Its hardness ensures efficient burr removal even on hardened tool steels.<\/p>\n\n  <h3>Pre-Plating &amp; Pre-Anodizing Surface Conditioning<\/h3>\n  <p>Chrome plating, nickel plating, anodizing, and PVD coating processes all require a clean, activated surface. Fine aluminum oxide blasting (F100\u2013F220) removes oxides, machining residues, and surface stresses, improving adhesion and uniformity of the subsequent surface treatment. White aluminum oxide is preferred for non-ferrous and stainless substrates in this application.<\/p>\n\n  <h3>Stone, Glass &amp; Ceramic Engraving<\/h3>\n  <p>Beyond industrial metal blasting, aluminum oxide is widely used for engraving decorative patterns into stone (granite, marble), architectural glass, and ceramic tiles. Medium to fine grits (F80\u2013F180) produce crisp, clean engraved lines with controllable depth.<\/p>\n\n  <!-- 8 -->\n  <h2 id=\"vs-others\">Aluminum Oxide vs Other Abrasive Blasting Media<\/h2>\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>Media<\/th><th>Hardness (Mohs)<\/th><th>Shape<\/th><th>Reuse<\/th><th>Cost\/Cycle<\/th><th>Iron Contamination<\/th><th>Best For<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td><strong>Aluminium-Oxid<\/strong><\/td><td class=\"td-c\">9<\/td><td>Eckig<\/td><td class=\"td-c\">4\u20138\u00d7<\/td><td>Low-Med<\/td><td>Brown: yes \/ White: no<\/td><td>Coating prep, thermal spray, deburring<\/td><\/tr>\n        <tr><td>Siliziumkarbid<\/td><td class=\"td-c\">9\u20139.5<\/td><td>Eckig<\/td><td class=\"td-c\">2\u20135\u00d7<\/td><td>Hoch<\/td><td>No<\/td><td>Ceramics, hardened steel, composites<\/td><\/tr>\n        <tr><td>Glass Bead<\/td><td class=\"td-c\">5.5\u20136<\/td><td>Spherical<\/td><td class=\"td-c\">3\u20136\u00d7<\/td><td>Medium<\/td><td>No<\/td><td>Peening, decorative finish, stainless<\/td><\/tr>\n        <tr><td>Stahlkies<\/td><td class=\"td-c\">7\u20138<\/td><td>Eckig<\/td><td class=\"td-c\">200\u2013300\u00d7<\/td><td>Sehr niedrig<\/td><td>Yes<\/td><td>High-volume steel prep, shipbuilding<\/td><\/tr>\n        <tr><td>Granat<\/td><td class=\"td-c\">7\u20138<\/td><td>Eckig<\/td><td class=\"td-c\">3\u20135\u00d7<\/td><td>Medium<\/td><td>No<\/td><td>Marine, eco-sensitive, low-dust<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n  <p>Aluminum oxide&#8217;s key advantage over <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/silicon-carbide-blasting-media-hardness-applications-reusability\/\" target=\"_blank\" rel=\"noopener\">Siliziumkarbid<\/a> is significantly lower cost at comparable hardness levels, making it the economically rational choice for the majority of high-performance blasting applications. Silicon carbide is reserved for substrates that alumina cannot adequately process \u2014 primarily ceramics and the hardest tool steels. Compared to <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/steel-shot-steel-grit-blasting-media-angular-vs-round-for-surface-prep\/\" target=\"_blank\" rel=\"noopener\">Stahlkorn<\/a>, aluminum oxide offers the critical advantage of zero iron contamination (white grade) and is the preferred choice wherever ferrous contamination would compromise the process or the end product.<\/p>\n  <p>For a full side-by-side comparison of all major media types, see: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-comparison-chart-hardness-profile-cost\/\" target=\"_blank\" rel=\"noopener\">Abrasive Blasting Media Comparison Chart: Hardness, Profile &amp; Cost<\/a>.<\/p>\n\n  <!-- 9 -->\n  <h2 id=\"safety\">Safety &amp; Handling<\/h2>\n  <p>Aluminum oxide is generally considered one of the safer industrial abrasives from a health standpoint. Its free silica content is less than 1% (brown grade) or less than 0.1% (white grade), placing it well below the threshold at which crystalline silica regulations trigger the most stringent engineering controls. It is chemically inert, non-flammable, and non-reactive with most industrial materials and cleaning agents.<\/p>\n  <p>However, all abrasive blasting operations generate airborne dust that can pose respiratory risks through nuisance dust inhalation, and adequate engineering controls remain essential:<\/p>\n  <ul>\n    <li>Operators must wear <strong>NIOSH-approved supplied-air respirators (Type CE)<\/strong> or equivalent respiratory protection during open blasting operations.<\/li>\n    <li>Enclosed blasting cabinets must be equipped with <strong>adequate dust collection and filtration<\/strong>, with filter maintenance performed on schedule.<\/li>\n    <li>Work areas must be <strong>properly ventilated<\/strong> to prevent accumulation of fine dust beyond permissible exposure limits.<\/li>\n    <li>Spent aluminum oxide must be <strong>disposed of in accordance with local solid waste regulations<\/strong>. In most jurisdictions it is classified as non-hazardous industrial waste, but this should be confirmed based on the substrate material blasted and any contaminants in the spent media.<\/li>\n  <\/ul>\n  <p>For comprehensive blasting safety protocols including PPE selection, ventilation design, and regulatory compliance, see: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-safety-ppe-ventilation-dust-control\/\" target=\"_blank\" rel=\"noopener\">Abrasive Blasting Media Safety: PPE, Ventilation &amp; Dust Control<\/a>.<\/p>\n\n  <div class=\"hlh-cta\">\n    <h3>Request Aluminum Oxide Blasting Media Samples<\/h3>\n    <p>Jiangsu Henglihong Technology supplies both brown and white aluminum oxide in grit sizes from F12 through F220, with full chemical analysis certificates and SSPC-AB 1 compliance documentation. Available in 25 kg bags and 1,000 kg bulk jumbo bags for global export.<\/p>\n    <a href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Get a Quote or Sample Request<\/a>\n  <\/div>\n\n  <hr>\n\n  <!-- FAQ -->\n  <h2 id=\"faq\">H\u00e4ufig gestellte Fragen<\/h2>\n  <div class=\"hlh-faq\">\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA1Toggle(this)\">What is aluminum oxide blasting media?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Aluminum oxide blasting media (also called alumina or corundum) is a synthetic abrasive produced by fusing bauxite in an electric arc furnace. It rates 9 on the Mohs hardness scale, features sharp angular particles, and is widely used for surface profiling, cleaning, and preparation prior to coatings and thermal spray processes.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA1Toggle(this)\">How many times can aluminum oxide blast media be reused?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Under a proper reclaim and classification system, aluminum oxide can typically be reused 4 to 8 times before particle breakdown reduces its cutting efficiency. Actual reuse cycles depend on operating pressure, nozzle type, and substrate hardness.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA1Toggle(this)\">What grit size of aluminum oxide is best for coating preparation?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">For most industrial coating preparation (Sa 2.5 cleanliness, 40\u201375 \u00b5m anchor profile), grit sizes between F36 and F80 are most commonly specified. Coarser grits (F12\u2013F24) are used for heavy mill scale; finer grits (F100\u2013F220) for precision conditioning and pre-plating work.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA1Toggle(this)\">Is aluminum oxide the same as alumina?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Yes. Aluminum oxide, alumina, and corundum all refer to Al\u2082O\u2083. In blasting contexts, &#8220;aluminum oxide&#8221; and &#8220;alumina&#8221; are used interchangeably. &#8220;Corundum&#8221; typically refers to the natural mineral form; industrial blasting media is manufactured synthetically via electric arc fusion.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA1Toggle(this)\">What is the difference between white and brown aluminum oxide?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Brown aluminum oxide (~95% Al\u2082O\u2083) is the cost-effective standard grade for general steel blasting. White aluminum oxide (~99.5% Al\u2082O\u2083) is higher purity, with near-zero iron content \u2014 preferred for stainless steel, non-ferrous metals, and applications where iron contamination must be avoided. Both grades offer comparable hardness and cutting performance.<\/div>\n    <\/div>\n  <\/div>\n\n  <hr>\n\n  <!-- Related Articles -->\n  <div class=\"hlh-related\">\n    <div class=\"hlh-related-title\">Related Guides in This Series<\/div>\n    <div class=\"hlh-related-grid\">\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-complete-guide-to-types-properties-selection\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Complete Guide<\/div>\n        <div class=\"rc-title\">Abrasive Blasting Media: Complete Guide to Types, Properties &amp; Selection<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/silicon-carbide-blasting-media-hardness-applications-reusability\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Media Types<\/div>\n        <div class=\"rc-title\">Silicon Carbide Blasting Media: Hardness, Applications &amp; Reusability<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-comparison-chart-hardness-profile-cost\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Selection Guide<\/div>\n        <div class=\"rc-title\">Abrasive Blasting Media Comparison Chart: Hardness, Profile &amp; Cost<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/blasting-media-grit-size-mesh-size-guide-how-to-read-convert\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Selection Guide<\/div>\n        <div class=\"rc-title\">Blasting Media Grit Size &amp; Mesh Size Guide: How to Read &amp; Convert<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-choose-abrasive-blasting-media-7-key-factors-explained\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Selection Guide<\/div>\n        <div class=\"rc-title\">How to Choose Abrasive Blasting Media: 7 Key Factors Explained<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-safety-ppe-ventilation-dust-control\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Safety &amp; Compliance<\/div>\n        <div class=\"rc-title\">Abrasive Blasting Media Safety: PPE, Ventilation &amp; Dust Control<\/div>\n      <\/a>\n    <\/div>\n  <\/div>\n\n<\/div>\n\n<script>\n(function(){\n  function hlhA1Toggle(btn){\n    var item=btn.closest('.hlh-faq-item');\n    var isOpen=item.classList.contains('open');\n    document.querySelectorAll('.hlh-a1 .hlh-faq-item').forEach(function(el){el.classList.remove('open');});\n    if(!isOpen){item.classList.add('open');}\n  }\n  window.hlhA1Toggle=hlhA1Toggle;\n})();\n<\/script>","protected":false},"excerpt":{"rendered":"<p>Media Types \u2014 In-Depth Guide Aluminum Oxide Blasting Media: Properties,  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":12761,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,175,138],"tags":[],"class_list":["post-12685","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-industry","category-resource"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/posts\/12685","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/comments?post=12685"}],"version-history":[{"count":2,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/posts\/12685\/revisions"}],"predecessor-version":[{"id":12687,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/posts\/12685\/revisions\/12687"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/media\/12761"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/media?parent=12685"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/categories?post=12685"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/tags?post=12685"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}