{"id":12857,"date":"2026-04-21T00:52:55","date_gmt":"2026-04-21T00:52:55","guid":{"rendered":"https:\/\/hlh-js.com\/?p=12857"},"modified":"2026-04-21T00:52:55","modified_gmt":"2026-04-21T00:52:55","slug":"aluminum-oxide-sandblasting-media-properties-grit-sizes-best-uses","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/de\/resource\/blog\/aluminum-oxide-sandblasting-media-properties-grit-sizes-best-uses\/","title":{"rendered":"Aluminum Oxide Sandblasting Media: Properties, Grit Sizes &amp; Best Uses"},"content":{"rendered":"<style>\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Barlow:wght@400;500;600;700&family=Barlow+Condensed:wght@600;700&display=swap');\n.hlh-c1*,.hlh-c1*::before,.hlh-c1*::after{box-sizing:border-box;margin:0;padding:0}\n.hlh-c1{font-family:'Barlow',sans-serif;font-size:17px;line-height:1.75;color:#1e2228;background:#fff;max-width:860px;margin:0 auto}\n.hlh-c1 h1{font-family:'Barlow 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class=\"c1-hero\">\n  <p class=\"c1-company-tag\">Jiangsu Henglihong Technology Co, Ltd.<\/p>\n  <h1>Aluminum Oxide Sandblasting Media: Properties, Grit Sizes &amp; Best Uses<\/h1>\n  <p class=\"c1-lead\">The definitive technical guide to aluminum oxide (Al\u2082O\u2083) abrasive \u2014 covering brown vs. white grades, Mohs hardness, mesh sizes, surface profile data, recyclability, and the applications where it outperforms every competing media type.<\/p>\n  <div class=\"c1-hero-meta\">\n    <span>&#128197; Updated April 2026<\/span>\n    <span>&#128338; 20 min read<\/span>\n    <span>&#9997; Henglihong Technical Editorial<\/span>\n  <\/div>\n<\/div>\n\n<!-- TOC -->\n<nav class=\"c1-toc\" aria-label=\"Table of Contents\">\n  <div class=\"c1-toc-title\">&#9776; Table of Contents<\/div>\n  <ol>\n    <li><a href=\"#c1-what\">What Is Aluminum Oxide Abrasive?<\/a><\/li>\n    <li><a href=\"#c1-properties\">Physical &amp; Chemical Properties<\/a><\/li>\n    <li><a href=\"#c1-grades\">Brown vs. White Aluminum Oxide<\/a><\/li>\n    <li><a href=\"#c1-grit\">Grit Size Chart &amp; Surface Profiles<\/a><\/li>\n    <li><a href=\"#c1-applications\">Best Uses &amp; Applications by Industry<\/a><\/li>\n    <li><a href=\"#c1-equipment\">Kompatibilit\u00e4t der Ger\u00e4te<\/a><\/li>\n    <li><a href=\"#c1-recyclability\">Recyclability &amp; Cost Per Cycle<\/a><\/li>\n    <li><a href=\"#c1-vs\">Aluminum Oxide vs. Other Media<\/a><\/li>\n    <li><a href=\"#c1-faq\">H\u00e4ufig gestellte Fragen<\/a><\/li>\n  <\/ol>\n<\/nav>\n\n<!-- SECTION 1 -->\n<section id=\"c1-what\">\n  <h2>What Is Aluminum Oxide Abrasive?<\/h2>\n  <p>Aluminum oxide \u2014 chemical formula Al\u2082O\u2083, also known as alumina, corundum, or alox \u2014 is a synthetic mineral abrasive produced by fusing bauxite ore in high-temperature electric arc furnaces (the Bayer and Hall\u2013H\u00e9roult processes). The result is an extremely hard, chemically stable crystalline material that fractures under impact to continuously expose fresh, razor-sharp cutting edges throughout the blasting cycle. This self-sharpening characteristic is one of the primary reasons aluminum oxide has become the most widely used mineral blasting abrasive in industrial surface preparation worldwide.<\/p>\n  <p>Unlike natural abrasives such as garnet or quartz, the composition, crystal structure, and particle geometry of aluminum oxide can be precisely controlled during manufacturing. This means that consistent hardness, predictable grit sizes, and reliable surface profile outcomes are achievable across production batches \u2014 a critical advantage in industrial coating specifications where surface profile tolerances are tight.<\/p>\n  <p>For a broader comparison of all available sandblasting media options, see our comprehensive <a href=\"https:\/\/hlh-js.com\/resource\/blog\/what-is-sandblasting-material-complete-guide-to-types-grit-selection\/\" target=\"_blank\" rel=\"noopener\">guide to sandblasting material types and selection<\/a>.<\/p>\n\n  <div class=\"c1-box c1-box-key\">\n    <div class=\"c1-box-title\">&#128270; At a Glance<\/div>\n    <p>Aluminum oxide is the first-choice industrial abrasive for steel surface preparation, aggressive rust and mill scale removal, weld cleaning, and surface profiling before protective coatings. It combines Mohs 9 hardness with angular geometry, outstanding recyclability, and broad grit-size availability \u2014 making it highly cost-effective for both open-blast and reclaim-system operations.<\/p>\n  <\/div>\n\n  <div class=\"c1-stats\">\n    <div class=\"c1-stat\"><div class=\"num\">9.0<\/div><div class=\"lbl\">Mohs hardness (2nd only to SiC &amp; diamond)<\/div><\/div>\n    <div class=\"c1-stat\"><div class=\"num\">15\u201330<\/div><div class=\"lbl\">Typical reuse cycles in reclaim systems<\/div><\/div>\n    <div class=\"c1-stat\"><div class=\"num\">3,720\u00b0C<\/div><div class=\"lbl\">Melting point \u2014 chemically very stable<\/div><\/div>\n    <div class=\"c1-stat\"><div class=\"num\">F12\u2013F220<\/div><div class=\"lbl\">Standard FEPA grit size range available<\/div><\/div>\n  <\/div>\n<\/section>\n\n<!-- SECTION 2 -->\n<section id=\"c1-properties\">\n  <h2>Physical &amp; Chemical Properties<\/h2>\n  <p>Understanding the underlying material science of aluminum oxide explains why it behaves so reliably in demanding blasting applications.<\/p>\n\n  <h3>Hardness and Crystal Structure<\/h3>\n  <p>At Mohs 9.0, aluminum oxide is harder than virtually every substrate and contaminant it will encounter in industrial blasting \u2014 including carbon steel (approximately Mohs 4\u20135), rust (Mohs 3\u20134), mill scale (Mohs 6\u20137), paint and organic coatings (Mohs 1\u20133), and even stainless steel (Mohs 5.5\u20136.5). This hardness margin ensures that each particle can cut decisively into contaminants and substrate alike without the particle itself dulling or deforming. The alpha-alumina crystal structure (corundum) is thermodynamically stable and does not react with most metals, acids at room temperature, or alkaline cleaning agents \u2014 making spent media relatively safe to handle and dispose of.<\/p>\n\n  <h3>Particle Shape: Blocky Angular<\/h3>\n  <p>Aluminum oxide particles produced by crushing fused alumina blocks have an irregular, blocky angular shape with multiple sharp facets and edges. When a particle impacts the substrate, these sharp edges function as micro-chisels, cutting into the surface and displacing contaminants or base material. This cutting action creates the pronounced, jagged anchor profile that coating engineers specify to maximize the mechanical adhesion of primers, epoxies, zinc-rich coatings, and polyurethane topcoats. The anchor profile depth (Ra and Rz values) produced by aluminum oxide at various grit sizes and pressures is well-documented in SSPC and ISO surface preparation standards, which is why it is the reference abrasive for many coating specification documents.<\/p>\n\n  <h3>Comparative Hardness \u2014 Key Blasting Media<\/h3>\n  <div class=\"c1-mohs-section\">\n    <p class=\"c1-mohs-label\">Mohs Scale Comparison (1 = softest, 10 = hardest)<\/p>\n    <div class=\"c1-mohs-row\"><span class=\"c1-mohs-name\">Siliziumkarbid<\/span><div class=\"c1-mohs-bar-bg\"><div class=\"c1-mohs-bar-fill\" style=\"width:95%\"><\/div><\/div><span class=\"c1-mohs-val\">9.5<\/span><\/div>\n    <div class=\"c1-mohs-row\"><span class=\"c1-mohs-name\">Aluminium-Oxid<\/span><div class=\"c1-mohs-bar-bg\"><div class=\"c1-mohs-bar-fill\" style=\"width:90%\"><\/div><\/div><span class=\"c1-mohs-val\">9.0<\/span><\/div>\n    <div class=\"c1-mohs-row\"><span class=\"c1-mohs-name\">Granat<\/span><div class=\"c1-mohs-bar-bg\"><div class=\"c1-mohs-bar-fill\" style=\"width:78%\"><\/div><\/div><span class=\"c1-mohs-val\">7.5\u20138<\/span><\/div>\n    <div class=\"c1-mohs-row\"><span class=\"c1-mohs-name\">Glasperlen<\/span><div class=\"c1-mohs-bar-bg\"><div class=\"c1-mohs-bar-fill\" style=\"width:57%\"><\/div><\/div><span class=\"c1-mohs-val\">5.5\u20136<\/span><\/div>\n    <div class=\"c1-mohs-row\"><span class=\"c1-mohs-name\">Crushed Glass<\/span><div class=\"c1-mohs-bar-bg\"><div class=\"c1-mohs-bar-fill\" style=\"width:57%\"><\/div><\/div><span class=\"c1-mohs-val\">5.5\u20136<\/span><\/div>\n    <div class=\"c1-mohs-row\"><span class=\"c1-mohs-name\">Walnut Shell<\/span><div class=\"c1-mohs-bar-bg\"><div class=\"c1-mohs-bar-fill\" style=\"width:37%\"><\/div><\/div><span class=\"c1-mohs-val\">3.5\u20134<\/span><\/div>\n  <\/div>\n\n  <h3>Chemical Stability and Contamination<\/h3>\n  <p>One significant advantage of aluminum oxide over ferrous abrasives (steel shot and grit) is that it introduces no iron contamination to the blasted surface. This makes it the preferred abrasive for blasting stainless steel, non-ferrous metals (aluminum, titanium, copper alloys), and any substrate where iron contamination would compromise the subsequent process \u2014 such as surfaces destined for stainless steel welding, electroplating, anodizing, or use in food-contact or pharmaceutical environments.<\/p>\n<\/section>\n\n<!-- SECTION 3 -->\n<section id=\"c1-grades\">\n  <h2>Brown vs. White Aluminum Oxide: Which Grade Do You Need?<\/h2>\n  <p>Aluminum oxide for blasting is available in two primary grades, distinguished by their purity level, toughness, and thermal properties. Selecting the correct grade for your application prevents unnecessary cost while ensuring the surface finish outcome you need.<\/p>\n\n  <div class=\"c1-grade-grid\">\n    <div class=\"c1-grade-card c1-grade-brown\">\n      <h3>&#11044; Brown Aluminum Oxide (BFA)<\/h3>\n      <p><strong>Al\u2082O\u2083 content:<\/strong> 94\u201397%<br><strong>Farbe:<\/strong> Brown to dark brown<br><strong>Toughness:<\/strong> Higher \u2014 more fracture-resistant<br><strong>Cost:<\/strong> Lower \u2014 most widely available<\/p>\n      <ul>\n        <li>General industrial surface preparation<\/li>\n        <li>Heavy rust and mill scale removal<\/li>\n        <li>Structural steel, bridges, pipelines<\/li>\n        <li>Blast cabinets and rooms with reclaim<\/li>\n        <li>Abrasive grinding wheels and bonded abrasives<\/li>\n      <\/ul>\n    <\/div>\n    <div class=\"c1-grade-card c1-grade-white\">\n      <h3>&#11044; White Aluminum Oxide (WFA)<\/h3>\n      <p><strong>Al\u2082O\u2083 content:<\/strong> 99%+<br><strong>Farbe:<\/strong> Wei\u00df<br><strong>Toughness:<\/strong> Lower \u2014 more friable, sharper fracture<br><strong>Cost:<\/strong> Higher \u2014 specialist applications<\/p>\n      <ul>\n        <li>Precision deburring of hardened tool steels<\/li>\n        <li>Stainless steel and non-ferrous metal blasting<\/li>\n        <li>Optical glass and lens grinding<\/li>\n        <li>Medical implant surface finishing<\/li>\n        <li>Applications requiring zero iron contamination<\/li>\n      <\/ul>\n    <\/div>\n  <\/div>\n\n  <div class=\"c1-box c1-box-amber\">\n    <div class=\"c1-box-title\">&#128161; Practical Recommendation<\/div>\n    <p>For the vast majority of structural steel surface preparation and industrial coating projects, <strong>brown aluminum oxide<\/strong> is the correct and most cost-effective choice. Reserve white aluminum oxide for applications involving stainless steel, titanium, non-ferrous metals, or high-precision finishing where iron contamination is a genuine disqualifying risk.<\/p>\n  <\/div>\n<\/section>\n\n<!-- SECTION 4 -->\n<section id=\"c1-grit\">\n  <h2>Grit Size Chart &amp; Surface Profile Data<\/h2>\n  <p>Aluminum oxide is commercially available across a very wide grit range, from coarse F12 (approximately 1.7 mm particle diameter) through ultra-fine F220 (approximately 0.063 mm). The table below maps FEPA grit designations to particle size ranges, approximate anchor profile depths on carbon steel, and typical application categories. For a complete cross-media grit size reference, see our <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-grit-size-chart-mesh-size-surface-profile-application-guide\/\" target=\"_blank\" rel=\"noopener\">sandblasting grit size chart and surface profile guide<\/a>.<\/p>\n\n  <div class=\"c1-table-wrap\">\n    <table class=\"c1-table\">\n      <thead>\n        <tr>\n          <th>FEPA Grit<\/th>\n          <th>US Mesh Approx.<\/th>\n          <th>Particle Size (mm)<\/th>\n          <th>Anchor Profile Ra (\u00b5m)<\/th>\n          <th>Anchor Profile Rz (\u00b5m)<\/th>\n          <th>Typical Use<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td><strong>F12<\/strong><\/td><td>#12<\/td><td>1.70\u20132.00<\/td><td>60\u201380<\/td><td>120\u2013150<\/td><td>Very aggressive profiling, thick scale<\/td><\/tr>\n        <tr><td><strong>F16<\/strong><\/td><td>#16<\/td><td>1.18\u20131.70<\/td><td>50\u201370<\/td><td>100\u2013130<\/td><td>Heavy structural steel, ship hull prep<\/td><\/tr>\n        <tr><td><strong>F24<\/strong><\/td><td>#24<\/td><td>0.71\u20131.18<\/td><td>40\u201355<\/td><td>80\u2013110<\/td><td>Industrial coating prep, bridge structures<\/td><\/tr>\n        <tr><td><strong>F36<\/strong><\/td><td>#36<\/td><td>0.50\u20130.71<\/td><td>30\u201345<\/td><td>60\u201390<\/td><td>General rust and mill scale removal<\/td><\/tr>\n        <tr><td><strong>F46<\/strong><\/td><td>#46<\/td><td>0.355\u20130.50<\/td><td>25\u201338<\/td><td>50\u201375<\/td><td>Versatile industrial prep, pipe coating<\/td><\/tr>\n        <tr><td><strong>F60<\/strong><\/td><td>#60<\/td><td>0.25\u20130.355<\/td><td>18\u201328<\/td><td>35\u201355<\/td><td\">Moderate profiling, weld cleaning<\/td><\/tr>\n        <tr><td><strong>F80<\/strong><\/td><td>#80<\/td><td>0.18\u20130.25<\/td><td>12\u201320<\/td><td>25\u201340<\/td><td>Automotive surface prep, light coatings<\/td><\/tr>\n        <tr><td><strong>F120<\/strong><\/td><td>#120<\/td><td>0.106\u20130.18<\/td><td>8\u201314<\/td><td>15\u201328<\/td><td>Precision deburring, thin-coat prep<\/td><\/tr>\n        <tr><td><strong>F180<\/strong><\/td><td>#180<\/td><td>0.075\u20130.106<\/td><td>4\u20138<\/td><td>8\u201315<\/td><td>Fine finishing, light etching<\/td><\/tr>\n        <tr><td><strong>F220<\/strong><\/td><td>#220<\/td><td>0.053\u20130.075<\/td><td>2\u20135<\/td><td>4\u201310<\/td><td>Ultra-fine finishing, glass etching<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <div class=\"c1-box c1-box-note\">\n    <div class=\"c1-box-title\">&#128203; Profile Depth Variance<\/div>\n    <p>Anchor profile depth depends not only on grit size but also on blast pressure (PSI), nozzle-to-surface standoff distance, nozzle diameter, and blast angle. The Ra\/Rz values above are representative of typical production conditions (80\u2013100 PSI, 6\u201310 inch standoff, perpendicular blast angle) on carbon steel. Always conduct trial blasts and measure actual profile with a surface profilometer before specifying for coating work.<\/p>\n  <\/div>\n<\/section>\n\n<!-- SECTION 5 -->\n<section id=\"c1-applications\">\n  <h2>Best Uses &amp; Applications by Industry<\/h2>\n  <p>Aluminum oxide&#8217;s combination of extreme hardness, angular geometry, and broad grit availability makes it the most versatile heavy-duty industrial abrasive. Below are the primary application domains where it consistently outperforms alternatives.<\/p>\n\n  <div class=\"c1-app-grid\">\n    <div class=\"c1-app-card\">\n      <strong>Structural Steel &amp; Infrastructure<\/strong>\n      <p>Removing tight mill scale, weld spatter, and heavy rust from I-beams, plates, and box sections prior to zinc-rich primer or epoxy coating. Sa 2.5 and Sa 3 cleanliness readily achievable.<\/p>\n    <\/div>\n    <div class=\"c1-app-card\">\n      <strong>Oil &amp; Gas Pipelines<\/strong>\n      <p>Internal and external pipe surface prep before FBE (fusion-bonded epoxy), polyethylene, or coal tar enamel coating. Aluminum oxide produces the anchor profile required by ISO 8501 and NACE SP0188 standards.<\/p>\n    <\/div>\n    <div class=\"c1-app-card\">\n      <strong>Marine &amp; Shipbuilding<\/strong>\n      <p>Hull plate preparation for anticorrosive primer systems. Where garnet or crushed glass may be preferred on environmentally sensitive drydock sites, aluminum oxide delivers superior throughput in enclosed or ventilated blast rooms.<\/p>\n    <\/div>\n    <div class=\"c1-app-card\">\n      <strong>Industrial Equipment &amp; Machinery<\/strong>\n      <p>Deburring castings, forgings, and machined components. Removing heat-treatment scale and oxidation from gear blanks, shafts, and structural weldments before quality inspection or finishing.<\/p>\n    <\/div>\n    <div class=\"c1-app-card\">\n      <strong>Aerospace Components<\/strong>\n      <p>White aluminum oxide for precision deburring of titanium and aluminum aerospace parts where iron contamination from steel media would be disqualifying. Consistent grit sizing ensures dimensional repeatability.<\/p>\n    <\/div>\n    <div class=\"c1-app-card\">\n      <strong>Metal Fabrication &amp; Weld Cleaning<\/strong>\n      <p>Removing weld oxidation (heat tint), spatter, and flux residue from stainless steel and carbon steel weldments before non-destructive testing (NDT) or final coating application.<\/p>\n    <\/div>\n    <div class=\"c1-app-card\">\n      <strong>Surface Etching &amp; Adhesion Prep<\/strong>\n      <p>Creating controlled micro-roughness on metal substrates for thermal spray coatings, ceramic coatings, rubber bonding, and adhesive joints. F24\u2013F46 grit delivers profiles compatible with most thermal spray specifications.<\/p>\n    <\/div>\n    <div class=\"c1-app-card\">\n      <strong>Glass Etching &amp; Decoration<\/strong>\n      <p>Fine-grade aluminum oxide (F120\u2013F220) for frosting, etching, and decorative sandblasting of architectural glass, glassware, and decorative panels. Produces a consistent matte finish with clean edge definition.<\/p>\n    <\/div>\n  <\/div>\n\n  <p>For a dedicated guide covering sandblasting media selection specifically for metal surface preparation \u2014 including cleanliness standards, coating compatibility, and case studies \u2014 see <a href=\"https:\/\/hlh-js.com\/resource\/blog\/best-sandblasting-material-for-metal-surface-prep-before-painting-coating\/\" target=\"_blank\" rel=\"noopener\">best sandblasting material for metal: surface prep before painting and coating<\/a>.<\/p>\n<\/section>\n\n<!-- SECTION 6 -->\n<section id=\"c1-equipment\">\n  <h2>Kompatibilit\u00e4t der Ger\u00e4te<\/h2>\n  <p>Aluminum oxide is compatible with all major categories of abrasive blasting equipment, but there are important operational parameters to observe to maximize media efficiency and protect equipment from accelerated wear.<\/p>\n\n  <h3>Pressure Blast Pots<\/h3>\n  <p>The most common setup for industrial aluminum oxide blasting. Recommended operating pressure is 80\u2013110 PSI for coarser grits (F12\u2013F46) and 60\u201390 PSI for finer grits (F80\u2013F220). Higher pressures accelerate media fracturing and generate more fines, reducing effective reuse cycles. Use tungsten carbide or boron carbide blast nozzles \u2014 aluminum oxide&#8217;s hardness will rapidly erode ceramic or steel nozzles. Nozzle bore diameter should be matched to grit size: coarse grits require larger bore diameters to avoid bridging and flow restriction.<\/p>\n\n  <h3>Blast Cabinets with Reclaim Systems<\/h3>\n  <p>Aluminum oxide performs exceptionally well in suction-feed and pressure-feed blast cabinets equipped with cyclone separator and media classifier. The classifier removes fines (broken-down particles below effective blasting size) and allows consistently sized media to recirculate. Regular classifier adjustment is essential to maintain surface profile consistency across the reuse life of the media charge.<\/p>\n\n  <h3>Blast Rooms<\/h3>\n  <p>Large-scale blast rooms with mechanical floor reclaim systems are the optimal environment for aluminum oxide in high-volume production. The reclaim system continuously removes fines, classified media is returned to the blast pot, and operators can treat large fabrications (tank sections, structural assemblies) efficiently. Proper dust collection (baghouse or cartridge filter) is mandatory \u2014 aluminum oxide generates moderate volumes of very fine abrasive dust that poses respiratory hazards if not controlled.<\/p>\n\n  <h3>Wet Blasting \/ Vapor Blasting<\/h3>\n  <p>Aluminum oxide can be used in wet blasting (slurry blasting) systems. The addition of water suppresses dust significantly and reduces the risk of RCS exposure. However, aluminum oxide does not dissolve or react with water, and it sinks readily, making it compatible with all common wet blasting equipment designs. Ensure that pH-neutral corrosion inhibitors are added to the water supply when wet-blasting carbon steel to prevent flash rust on the freshly blasted surface.<\/p>\n<\/section>\n\n<!-- SECTION 7 -->\n<section id=\"c1-recyclability\">\n  <h2>Recyclability &amp; True Cost Per Blast Cycle<\/h2>\n  <p>The economic case for aluminum oxide in production blasting is built on its recyclability \u2014 not its purchase price. When operated in a well-maintained reclaim system with proper classification, a single charge of aluminum oxide can sustain 15 to 30 effective blast cycles before the proportion of fines (particles too small to produce the target surface profile) becomes excessive and the charge must be refreshed.<\/p>\n\n  <h3>Cost Per Square Meter \u2014 Sample Calculation<\/h3>\n  <div class=\"c1-box c1-box-note\">\n    <div class=\"c1-box-title\">&#128200; Illustrative Cost Model<\/div>\n    <p>Assumptions: Brown aluminum oxide F36, bulk purchase price $0.80\/kg; consumption rate 0.3 kg\/m\u00b2 per cycle (pressure blast at 90 PSI); 20 effective reuse cycles in a reclaim system with classifier. <strong>Cost per m\u00b2<\/strong> = $0.80 \u00f7 20 cycles \u00d7 0.3 kg\/m\u00b2 = <strong>approximately $0.012 per m\u00b2<\/strong> \u2014 comparable to or lower than single-use media alternatives when their full disposal and handling costs are included. Note: these figures are illustrative; actual costs vary significantly by region, volume, and blast parameters.<\/p>\n  <\/div>\n\n  <h3>Maximizing Reuse Life: Operational Best Practices<\/h3>\n  <ul>\n    <li><strong>Maintain classifier settings:<\/strong> A properly adjusted cyclone separator and classifier will continuously remove fines and broken particles, allowing only effective-size media to recirculate. This is the single most important factor in maximizing reuse cycles.<\/li>\n    <li><strong>Control blast pressure:<\/strong> Excess pressure accelerates particle fracturing. Use the minimum pressure that achieves your target surface profile \u2014 typically 80\u201390 PSI for F36\u2013F46 on carbon steel.<\/li>\n    <li><strong>Keep media dry:<\/strong> Moisture causes media agglomeration, nozzle clogging, and surface flash rust. Ensure that the compressed air supply is properly dried (refrigerant or desiccant dryer) before it enters the blast pot.<\/li>\n    <li><strong>Monitor particle size distribution:<\/strong> Periodically sieve a sample of the circulating media charge and compare the particle size distribution to the original specification. When the fines fraction exceeds approximately 30% by weight, it is time to top up with fresh media.<\/li>\n  <\/ul>\n<\/section>\n\n<!-- SECTION 8 -->\n<section id=\"c1-vs\">\n  <h2>Aluminum Oxide vs. Other Blasting Media<\/h2>\n  <p>The right media comparison depends on the specific combination of substrate, contaminant, required finish, operating environment, and budget. The table below provides a direct comparison across the most common decision scenarios. For a comprehensive multi-media comparison tool, see the <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-media-comparison-chart-hardness-cost-recyclability\/\" target=\"_blank\" rel=\"noopener\">sandblasting media comparison chart<\/a>.<\/p>\n\n  <div class=\"c1-table-wrap\">\n    <table class=\"c1-table\">\n      <thead>\n        <tr>\n          <th>Comparison<\/th>\n          <th>Al\u2082O\u2083 Wins When\u2026<\/th>\n          <th>Alternative Wins When\u2026<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr>\n          <td><strong>vs. Glass Beads<\/strong><\/td>\n          <td>Rust removal, heavy coatings, anchor profile needed for coating adhesion, hard substrates<\/td>\n          <td>Polishing, peening, smooth finish required, stainless steel aesthetic finishing, thin aluminum panels<\/td>\n        <\/tr>\n        <tr>\n          <td><strong>vs. Steel Grit<\/strong><\/td>\n          <td>Stainless steel, non-ferrous metals, no-iron-contamination applications, smaller batch \/ open blast<\/td>\n          <td>Very high volume structural steel in closed-loop system; lowest possible cost per m\u00b2<\/td>\n        <\/tr>\n        <tr>\n          <td><strong>vs. Garnet<\/strong><\/td>\n          <td>Higher throughput, harder substrates, tighter profiles, lower cost at equivalent hardness<\/td>\n          <td>Environmentally sensitive open-air sites; waterjet cutting applications<\/td>\n        <\/tr>\n        <tr>\n          <td><strong>vs. Silicon Carbide<\/strong><\/td>\n          <td>Most industrial metals and alloys; cost-effective performance across typical applications<\/td>\n          <td>Extremely hard substrates (tungsten carbide, technical ceramics) where Al\u2082O\u2083 cannot cut efficiently<\/td>\n        <\/tr>\n        <tr>\n          <td><strong>vs. Crushed Glass<\/strong><\/td>\n          <td>Recyclability, harder substrates, higher productivity, larger anchor profiles<\/td>\n          <td>Environmental compliance, single-use open-blast, lower-budget operations on concrete and masonry<\/td>\n        <\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <p>For guidance on selecting between these media in the specific context of automotive restoration projects, see our guide on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-material-for-automotive-restoration-remove-paint-without-warping\/\" target=\"_blank\" rel=\"noopener\">sandblasting material for automotive restoration<\/a>.<\/p>\n<\/section>\n\n<!-- FAQ -->\n<section id=\"c1-faq\">\n  <h2>H\u00e4ufig gestellte Fragen<\/h2>\n  <div class=\"c1-faq\">\n\n    <div class=\"c1-faq-item\">\n      <button class=\"c1-faq-q\" onclick=\"this.closest('.c1-faq-item').classList.toggle('open')\">\n        What is the difference between F-grade and P-grade aluminum oxide?\n        <span class=\"c1-faq-icon\">+<\/span>\n      <\/button>\n      <div class=\"c1-faq-a\">\n        <p>F-grade (macro grits, FEPA F-series, e.g., F12\u2013F220) is the standard specification for bonded abrasives, grinding wheels, and blasting media. P-grade (FEPA P-series, e.g., P40\u2013P2500) is used for coated abrasives such as sandpaper and abrasive belts \u2014 it uses a different sieving methodology that produces a different particle distribution at nominally equivalent grit numbers. For blasting applications, always specify F-grade aluminum oxide. Mixing up the two specifications leads to surface profile inconsistency and poor process repeatability.<\/p>\n      <\/div>\n    <\/div>\n\n    <div class=\"c1-faq-item\">\n      <button class=\"c1-faq-q\" onclick=\"this.closest('.c1-faq-item').classList.toggle('open')\">\n        Can aluminum oxide be used on stainless steel without causing contamination?\n        <span class=\"c1-faq-icon\">+<\/span>\n      <\/button>\n      <div class=\"c1-faq-a\">\n        <p>Yes \u2014 and this is one of aluminum oxide&#8217;s key advantages over steel abrasives. Because aluminum oxide contains no iron, it does not contaminate the stainless steel surface with ferrous particles that would subsequently oxidize and appear as rust staining (a common problem when carbon steel equipment or steel abrasives are used on stainless steel). For stainless steel applications, use <strong>white aluminum oxide<\/strong> (WFA, 99%+ Al\u2082O\u2083 purity) rather than brown, as brown grades contain small amounts of titanium oxide and other trace elements that could theoretically introduce contamination in the most demanding applications (pharmaceutical, food-grade, aerospace).<\/p>\n      <\/div>\n    <\/div>\n\n    <div class=\"c1-faq-item\">\n      <button class=\"c1-faq-q\" onclick=\"this.closest('.c1-faq-item').classList.toggle('open')\">\n        What grit size of aluminum oxide should I use for surface prep before painting?\n        <span class=\"c1-faq-icon\">+<\/span>\n      <\/button>\n      <div class=\"c1-faq-a\">\n        <p>The correct grit size depends on the coating system being applied and its specified anchor profile requirement. As a general guide: for heavy-duty industrial epoxy and zinc-rich primers (typical anchor profile 40\u201375 \u00b5m Ra), specify F36\u2013F46 aluminum oxide. For automotive primers and thin-film industrial coatings (anchor profile 20\u201340 \u00b5m Ra), F60\u2013F80 is appropriate. For thin architectural coatings and powder coatings (anchor profile 10\u201325 \u00b5m Ra), F80\u2013F120 works well. Always consult the coating manufacturer&#8217;s technical data sheet for the required surface profile range \u2014 this is the starting point for grit selection.<\/p>\n      <\/div>\n    <\/div>\n\n    <div class=\"c1-faq-item\">\n      <button class=\"c1-faq-q\" onclick=\"this.closest('.c1-faq-item').classList.toggle('open')\">\n        Does Jiangsu Henglihong supply aluminum oxide in bulk for export?\n        <span class=\"c1-faq-icon\">+<\/span>\n      <\/button>\n      <div class=\"c1-faq-a\">\n        <p>Yes. Jiangsu Henglihong Technology Co., Ltd. manufactures and exports brown aluminum oxide (BFA) and white aluminum oxide (WFA) in FEPA F-grade grit sizes from F12 through F220, in both 25 kg bags and bulk super-sack (1,000 kg) packaging. We serve B2B customers in the surface treatment, shipbuilding, oil &amp; gas pipeline, and general metal fabrication sectors across Europe, North America, Southeast Asia, and the Middle East. Contact our team using the options below for pricing, technical data sheets, and sample requests.<\/p>\n      <\/div>\n    <\/div>\n\n  <\/div>\n<\/section>\n\n<hr class=\"c1-divider\">\n\n<!-- Related Links -->\n<div class=\"c1-related\">\n  <div class=\"c1-related-title\">&#128214; Related Guides in This Resource Hub<\/div>\n  <ul>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/what-is-sandblasting-material-complete-guide-to-types-grit-selection\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>Complete Guide to Sandblasting Material Types &amp; Selection (Pillar)<\/a><\/li>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-grit-size-chart-mesh-size-surface-profile-application-guide\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>Sandblasting Grit Size Chart &amp; Mesh Size Guide<\/a><\/li>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-media-comparison-chart-hardness-cost-recyclability\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>Sandblasting Media Comparison Chart: Hardness, Cost &amp; Recyclability<\/a><\/li>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/best-sandblasting-material-for-metal-surface-prep-before-painting-coating\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>Best Sandblasting Material for Metal Surface Prep<\/a><\/li>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/silicon-carbide-sandblasting-media-hardest-abrasive-for-ceramics-carbide\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>Silicon Carbide Sandblasting Media (Harder Alternative)<\/a><\/li>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-choose-sandblasting-material-step-by-step-selection-guide\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>How to Choose Sandblasting Material: Step-by-Step Guide<\/a><\/li>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-media-safety-silica-health-risks-osha-rules-safe-alternatives\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>Sandblasting Media Safety &amp; OSHA Rules<\/a><\/li>\n  <\/ul>\n<\/div>\n\n<!-- CTA -->\n<div class=\"c1-cta-pair\">\n  <div class=\"c1-cta c1-cta-primary\">\n    <h3>Request a Quote<\/h3>\n    <p>Specify your grit size, grade (brown or white), packaging format, and annual volume. We will respond with a competitive FOB\/CIF price within 24 hours.<\/p>\n    <a class=\"c1-btn c1-btn-white\" href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Get a Free Quote &#8594;<\/a>\n  <\/div>\n  <div class=\"c1-cta c1-cta-secondary\">\n    <h3>Talk to a Technical Advisor<\/h3>\n    <p>Not sure which aluminum oxide grade or grit size matches your coating specification? Our engineers will review your application and recommend the optimal solution.<\/p>\n    <a class=\"c1-btn c1-btn-dark\" href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Contact Our Team &#8594;<\/a>\n  <\/div>\n<\/div>\n\n<\/div>\n<script>\n(function(){\n  document.querySelectorAll('.c1-faq-q').forEach(function(btn){\n    btn.addEventListener('click',function(){\n      var item=this.closest('.c1-faq-item');\n      var icon=item.querySelector('.c1-faq-icon');\n      var wasOpen=item.classList.contains('open');\n      document.querySelectorAll('.c1-faq-item').forEach(function(el){\n        el.classList.remove('open');\n        el.querySelector('.c1-faq-icon').textContent='+';\n      });\n      if(!wasOpen){item.classList.add('open');icon.textContent='\u00d7';}\n    });\n  });\n})();\n<\/script>","protected":false},"excerpt":{"rendered":"<p>Jiangsu Henglihong Technology Co., Ltd. Aluminum Oxide Sandblasting Media: Properties,  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":12898,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,175,138],"tags":[],"class_list":["post-12857","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\/12857","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=12857"}],"version-history":[{"count":2,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/posts\/12857\/revisions"}],"predecessor-version":[{"id":12859,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/posts\/12857\/revisions\/12859"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/media\/12898"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/media?parent=12857"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/categories?post=12857"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/tags?post=12857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}