{"id":13360,"date":"2026-06-10T01:38:32","date_gmt":"2026-06-10T01:38:32","guid":{"rendered":"https:\/\/hlh-js.com\/?p=13360"},"modified":"2026-06-10T01:38:32","modified_gmt":"2026-06-10T01:38:32","slug":"black-beauty-blasting-media-for-ship-hull-cleaning-application-guide","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/de\/resource\/blog\/black-beauty-blasting-media-for-ship-hull-cleaning-application-guide\/","title":{"rendered":"Black Beauty Blasting Media for Ship Hull Cleaning: Application Guide"},"content":{"rendered":"<style>\n.hlh-wrap*,.hlh-wrap *::before,.hlh-wrap *::after{box-sizing:border-box;margin:0;padding:0}\n.hlh-wrap{--ink:#1a1a2e;--ink2:#4a4a6a;--gold:#c8902a;--gold-lt:#f5e6c8;--steel:#2d3a4a;--steel-lt:#eaf0f6;--r:8px;font-family:Georgia,'Times New Roman',serif;color:var(--ink);line-height:1.8;font-size:17px;background:#fff}\n.hlh-hero{background:linear-gradient(135deg,#0a1a2e 0%,#1a2d3a 55%,#2d3a4a 100%);color:#fff;padding:64px 40px 48px;border-radius:var(--r);margin-bottom:44px;position:relative;overflow:hidden}\n.hlh-hero::after{content:'';position:absolute;bottom:-70px;right:-70px;width:300px;height:300px;border-radius:50%;background:rgba(200,144,42,.12);pointer-events:none}\n.hlh-badge{display:inline-block;background:var(--gold);color:#fff;font-family:Arial,sans-serif;font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;padding:4px 14px;border-radius:40px;margin-bottom:18px}\n.hlh-hero h1{font-size:clamp(22px,3.5vw,36px);font-weight:700;line-height:1.25;color:#fff;margin-bottom:16px}\n.hlh-hero p{font-family:Arial,sans-serif;font-size:16px;color:rgba(255,255,255,.80);max-width:660px;margin-bottom:24px}\n.hlh-hero-meta{font-family:Arial,sans-serif;font-size:13px;color:rgba(255,255,255,.50)}\n.hlh-hero-meta span{margin-right:22px}\n.hlh-body{max-width:880px;margin:0 auto;padding:0 20px 60px}\n.hlh-toc{background:var(--steel-lt);border-left:4px solid var(--gold);border-radius:var(--r);padding:26px 30px;margin-bottom:48px}\n.hlh-toc-label{font-family:Arial,sans-serif;font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--ink2);margin-bottom:14px}\n.hlh-toc ol{padding-left:20px;font-family:Arial,sans-serif;font-size:14px;line-height:2.1}\n.hlh-toc a{color:var(--steel);text-decoration:none;border-bottom:1px dotted var(--gold)}\n.hlh-toc a:hover{color:var(--gold)}\n.hlh-wrap h2{font-size:clamp(19px,3vw,26px);color:var(--steel);border-bottom:2px solid var(--gold);padding-bottom:8px;margin:52px 0 20px;line-height:1.3}\n.hlh-wrap h3{font-size:clamp(16px,2.5vw,20px);color:var(--ink);margin:32px 0 12px}\n.hlh-wrap p{margin-bottom:18px}\n.hlh-wrap a.hl{color:var(--gold);font-weight:600;text-decoration:none;border-bottom:1px solid rgba(200,144,42,.35)}\n.hlh-wrap a.hl:hover{border-color:var(--gold)}\n.hlh-box{background:var(--gold-lt);border-left:4px solid var(--gold);border-radius:var(--r);padding:18px 22px;margin:26px 0;font-family:Arial,sans-serif;font-size:15px;line-height:1.7}\n.hlh-table-wrap{overflow-x:auto;margin:24px 0 32px}\n.hlh-table{width:100%;border-collapse:collapse;font-family:Arial,sans-serif;font-size:14px}\n.hlh-table thead th{background:var(--steel);color:#fff;padding:11px 15px;text-align:left;font-size:13px}\n.hlh-table tbody tr:nth-child(even){background:var(--steel-lt)}\n.hlh-table tbody td{padding:10px 15px;border-bottom:1px solid #dde4ec;vertical-align:top}\n.hlh-steps{counter-reset:step;list-style:none;margin:20px 0 32px;padding:0}\n.hlh-steps li{counter-increment:step;position:relative;padding:14px 16px 14px 56px;margin-bottom:12px;background:var(--steel-lt);border-radius:var(--r);font-family:Arial,sans-serif;font-size:15px;line-height:1.65}\n.hlh-steps li::before{content:counter(step);position:absolute;left:16px;top:50%;transform:translateY(-50%);width:28px;height:28px;background:var(--gold);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px}\n.hlh-back{background:var(--steel-lt);border-radius:var(--r);padding:20px 24px;margin-top:52px;font-family:Arial,sans-serif;font-size:14.5px;border-left:4px solid var(--steel)}\n.hlh-divider{border:none;border-top:1px solid #e0e7ef;margin:44px 0}\n@media(max-width:680px){.hlh-hero{padding:44px 22px 36px}.hlh-body{padding:0 14px 48px}}\n<\/style>\n\n<div class=\"hlh-wrap\">\n<div class=\"hlh-hero\">\n  <div class=\"hlh-badge\">Cluster D1 \u00b7 Application Scenario<\/div>\n  <h1>Black Beauty Blasting Media for Ship Hull Cleaning: Application Guide<\/h1>\n  <p>Dry-dock blasting protocols, antifouling coating prep requirements, and NACE\/SSPC compliance guidance for marine contractors and shipyard surface preparation engineers.<\/p>\n  <div class=\"hlh-hero-meta\">\n    <span>\ud83d\udcc5 June 2026<\/span>\n    <span>\u270d\ufe0f Jiangsu Henglihong Technology Co., Ltd.<\/span>\n    <span>\u23f1 9 min read<\/span>\n  <\/div>\n<\/div>\n\n<div class=\"hlh-body\">\n<nav class=\"hlh-toc\" aria-label=\"Table of Contents\">\n  <div class=\"hlh-toc-label\">Table of Contents<\/div>\n  <ol>\n    <li><a href=\"#why-blast\">Why Abrasive Blasting Is the Standard for Hull Cleaning<\/a><\/li>\n    <li><a href=\"#why-coal-slag\">Why Coal Slag Is Used in Shipyards<\/a><\/li>\n    <li><a href=\"#grade-selection\">Grade Selection for Marine Applications<\/a><\/li>\n    <li><a href=\"#sspc-nace\">SSPC and NACE Standards for Hull Preparation<\/a><\/li>\n    <li><a href=\"#dry-dock\">Dry-Dock Blasting Protocol<\/a><\/li>\n    <li><a href=\"#coating-systems\">Antifouling and Coating System Compatibility<\/a><\/li>\n    <li><a href=\"#chloride\">Chloride Contamination and Salt Testing<\/a><\/li>\n    <li><a href=\"#spent-media\">Spent Media Management in Dry Dock<\/a><\/li>\n    <li><a href=\"#alternatives\">When to Consider an Alternative Abrasive<\/a><\/li>\n  <\/ol>\n<\/nav>\n\n<h2 id=\"why-blast\">1. Why Abrasive Blasting Is the Standard for Hull Cleaning<\/h2>\n<p>Ship hull steel operates in one of the most demanding corrosion environments known to engineering \u2014 continuously immersed in chloride-laden seawater, subject to mechanical erosion from water flow, barnacle attachment, and periodic dry-docking stress. Hull coatings must adhere under these conditions for two to five years between dry-docking intervals, which demands surface preparation of the highest quality.<\/p>\n<p>Abrasive blasting achieves what no other surface preparation method can: complete removal of old antifouling coatings, corrosion products, and mill scale while simultaneously creating the angular mechanical anchor profile that high-build epoxy tie-coats and antifouling topcoats require for adhesion in continuous seawater immersion service.<\/p>\n<p>High-pressure water jetting (HPWJ) is used increasingly for maintenance blasting between full dry-docks, but it cannot create a new anchor profile on bare steel \u2014 making abrasive blasting the required method for any hull section where the substrate has been exposed to bare metal or where the anchor profile has been degraded by erosion or pitting.<\/p>\n<p>For the full overview of Black Beauty&#8217;s properties and applications: <a class=\"hl\" href=\"https:\/\/hlh-js.com\/resource\/blog\/black-beauty-abrasive-blasting-media-complete-buyers-guide\/\" target=\"_blank\" rel=\"noopener\">Black Beauty Abrasive Blasting Media: The Complete Buyer&#8217;s Guide<\/a>.<\/p>\n\n<h2 id=\"why-coal-slag\">2. Why Coal Slag Is Used in Shipyards<\/h2>\n<p>Coal slag abrasive \u2014 both Black Beauty-branded and specification-equivalent products \u2014 has been a shipyard standard for decades, for several practical reasons:<\/p>\n<ul style=\"font-family:Arial,sans-serif;font-size:15px;line-height:2.1;padding-left:22px;margin-bottom:18px\">\n  <li><strong>Volume economics:<\/strong> A Panamax-class cargo vessel has approximately 25,000\u201340,000 m\u00b2 (270,000\u2013430,000 ft\u00b2) of hull surface requiring blasting. At typical media consumption rates of 0.5\u20130.8 lb\/ft\u00b2, a full hull blast requires 60\u2013160 tons of abrasive. At $150\u2013220\/ton, coal slag is the lowest-cost SSPC-compliant option at these volumes.<\/li>\n  <li><strong>Single-use practicality:<\/strong> Shipyards typically operate in contained dry-dock environments where spent media must be collected and disposed of regardless of media type. Coal slag&#8217;s single-use economics \u2014 lower purchase price offset by simple disposal \u2014 are often better than the reclaim system investment required to justify garnet or aluminum oxide.<\/li>\n  <li><strong>Profile adequacy:<\/strong> Coarse-grade coal slag (8\/16 mesh) reliably achieves the 4.0\u20136.0 Mil anchor profiles required by major antifouling coating manufacturers and IMO PSPC (International Maritime Organization Performance Standard for Protective Coatings) for ballast tanks and hull immersion zones.<\/li>\n  <li><strong>Speed of supply:<\/strong> Coal slag is available in super-sack and bulk tanker delivery from multiple regional suppliers in all major port cities globally, ensuring uninterrupted supply during tight dry-docking schedules.<\/li>\n<\/ul>\n\n<h2 id=\"grade-selection\">3. Grade Selection for Marine Applications<\/h2>\n<div class=\"hlh-table-wrap\">\n<table class=\"hlh-table\">\n<thead><tr><th>Hull Zone<\/th><th>Typical Corrosion Condition<\/th><th>Recommended Grade<\/th><th>Target Profile (Mil)<\/th><th>SSPC-SP Target<\/th><\/tr><\/thead>\n<tbody>\n<tr><td><strong>Underwater hull plating (external)<\/strong><\/td><td>Grade C\u2013D; old antifouling + marine growth<\/td><td>Coarse (8\/16)<\/td><td>4.0\u20136.0<\/td><td>SP 10 or SP 5<\/td><\/tr>\n<tr><td><strong>Boot top \/ waterline zone<\/strong><\/td><td>Grade C; alternating wet\/dry; heavy pitting<\/td><td>Coarse (8\/16) or Medium (12\/40)<\/td><td>3.5\u20135.5<\/td><td>SP 10<\/td><\/tr>\n<tr><td><strong>Topsides \/ freeboard<\/strong><\/td><td>Grade B\u2013C; old topcoat, light to moderate rust<\/td><td>Medium (12\/40)<\/td><td>3.0\u20134.8<\/td><td>SP 10<\/td><\/tr>\n<tr><td><strong>Ballast tank interior<\/strong><\/td><td>Grade C\u2013D; severe pitting; old coating<\/td><td>Coarse (8\/16)<\/td><td>4.5\u20136.0+<\/td><td>SP 5 (IMO PSPC requires Sa 2.5)<\/td><\/tr>\n<tr><td><strong>Superstructure \/ deck<\/strong><\/td><td>Grade B; salt-contaminated; chalked topcoat<\/td><td>Fine (20\/40) or Medium (12\/40)<\/td><td>2.5\u20134.0<\/td><td>SP 10<\/td><\/tr>\n<tr><td><strong>Chain locker \/ void spaces<\/strong><\/td><td>Grade C\u2013D; isolated<\/td><td>Medium (12\/40) or Coarse (8\/16)<\/td><td>3.0\u20135.0<\/td><td>SP 10 or SP 5<\/td><\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\n<div class=\"hlh-box\">\n  <strong>IMO PSPC Requirement:<\/strong> For ballast tanks on vessels subject to IMO Resolution MSC.215(82), the Performance Standard for Protective Coatings requires Sa 2.5 (equivalent to SSPC-SP 10 Near-White) as the minimum surface preparation standard, with a minimum anchor profile of 30\u201375 \u03bcm (approximately 1.2\u20133.0 Mil). Coarse Black Beauty exceeds this profile requirement \u2014 verify the coating manufacturer&#8217;s maximum profile limit to avoid over-profiling.\n<\/div>\n\n<h2 id=\"sspc-nace\">4. SSPC and NACE Standards for Hull Preparation<\/h2>\n<p>Ship hull blasting is governed by two parallel standard systems \u2014 SSPC (Society for Protective Coatings, U.S.-centric) and NACE International (now merged into AMPP \u2014 Association for Materials Protection and Performance). Both are referenced in international shipbuilding and ship repair contracts.<\/p>\n<div class=\"hlh-table-wrap\">\n<table class=\"hlh-table\">\n<thead><tr><th>Standard<\/th><th>SSPC Designation<\/th><th>NACE\/ISO Equivalent<\/th><th>Beschreibung<\/th><th>Marine Use<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Near-White Blast<\/td><td>SSPC-SP 10<\/td><td>NACE No. 2 \/ ISO Sa 2.5<\/td><td>95%+ area free of visible contamination<\/td><td>Hull plating, topsides, most shipyard work<\/td><\/tr>\n<tr><td>White Metal Blast<\/td><td>SSPC-SP 5<\/td><td>NACE No. 1 \/ ISO Sa 3<\/td><td>100% free of all visible contamination<\/td><td>Ballast tanks (IMO PSPC), critical immersion zones<\/td><\/tr>\n<tr><td>Commercial Blast<\/td><td>SSPC-SP 6<\/td><td>NACE No. 3 \/ ISO Sa 2<\/td><td>2\/3 area free of visible residue<\/td><td>Topside maintenance with less critical coatings<\/td><\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>NACE SP0108 (Corrosion Control of Offshore Structures by Protective Coatings) and NACE SP0188 (Holiday Testing) are frequently referenced alongside SSPC surface preparation standards in offshore vessel and platform maintenance specifications.<\/p>\n\n<h2 id=\"dry-dock\">5. Dry-Dock Blasting Protocol<\/h2>\n<ol class=\"hlh-steps\">\n  <li><strong>Pre-blast assessment and planning.<\/strong> Survey the hull for coating condition, pitting depth, and weld bead geometry before media selection. Identify any watertight penetrations, sea chests, or zinc anodes that require masking or removal. Confirm media grade and volume requirements with the coating applicator&#8217;s technical representative.<\/li>\n  <li><strong>Containment setup.<\/strong> Erect containment sheeting around the dry dock or vessel to prevent spent media and dust from escaping the work area. Comply with port authority environmental regulations \u2014 many ports prohibit uncontained dry abrasive blasting within their boundaries.<\/li>\n  <li><strong>Equipment staging.<\/strong> Position pressure blast pots at dock-level supply points with hose runs sized for nozzle pressure delivery. For large vessels, multiple blast crews operating simultaneously with 2\u20134 nozzles maximize schedule efficiency. Compressors: minimum 375 CFM per Coarse-grade nozzle at 100\u2013110 psi.<\/li>\n  <li><strong>Surface degreasing (if required).<\/strong> If the hull shows oil, bilge fluid, or heavy grease contamination \u2014 common at the waterline and boot top \u2014 degrease with a compatible marine degreaser and freshwater rinse before blasting. Blasting over oily contamination embeds the contaminant into the steel profile and causes catastrophic coating adhesion failure.<\/li>\n  <li><strong>Blasting sequence.<\/strong> Work from top to bottom: topsides and superstructure first, then boot top, then underwater body. This prevents re-contamination of lower blasted zones by spent media and runoff from higher sections. Maintain nozzle-to-surface distance of 12\u201318 inches for Coarse grade; adjust for local pitting geometry.<\/li>\n  <li><strong>Surface cleanliness and profile verification.<\/strong> After blasting each zone, inspect with SSPC-VIS 1 comparator under adequate lighting before moving to the next section. Measure anchor profile using Testex Press-O-Film tape at minimum 3 locations per 500 m\u00b2 of blasted surface.<\/li>\n  <li><strong>Soluble salt testing.<\/strong> Test blasted surfaces for soluble salt contamination using Bresle patch sampling (ISO 8502-6) or equivalent. IMO PSPC limits soluble salt to 50 mg\/m\u00b2 NaCl equivalent on ballast tank surfaces before coating application. Freshwater wash may be required if salt levels exceed threshold.<\/li>\n  <li><strong>Coating application window.<\/strong> Apply the first coat of the approved coating system within the coating manufacturer&#8217;s flash rust window \u2014 typically within 4 hours on clean steel at &lt;50% relative humidity. In humid tropical dry-dock environments, this window may compress to 1\u20132 hours.<\/li>\n<\/ol>\n\n<h2 id=\"coating-systems\">6. Antifouling and Coating System Compatibility<\/h2>\n<p>Black Beauty Coarse grade (8\/16 mesh) creates the 4.0\u20136.0 Mil anchor profile required by most hull coating systems used in marine service. Compatibility with common hull coating systems:<\/p>\n<div class=\"hlh-table-wrap\">\n<table class=\"hlh-table\">\n<thead><tr><th>Coating System Type<\/th><th>Required Profile (Mil)<\/th><th>Black Beauty Grade<\/th><th>Notes<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Epoxy tie-coat + self-polishing antifouling (SPA)<\/td><td>3.5\u20135.0<\/td><td>Coarse (8\/16)<\/td><td>Standard hull system for cargo vessels; dominant system in commercial shipping<\/td><\/tr>\n<tr><td>High-build epoxy + ablative antifouling<\/td><td>3.0\u20135.0<\/td><td>Medium (12\/40) or Coarse<\/td><td>Common on tankers and bulk carriers<\/td><\/tr>\n<tr><td>Zinc silicate primer + epoxy + antifouling<\/td><td>3.0\u20134.5<\/td><td>Medium (12\/40)<\/td><td>Three-coat system; zinc primer requires controlled profile \u2014 avoid over-profiling<\/td><\/tr>\n<tr><td>IMO PSPC ballast tank coating<\/td><td>30\u201375 \u03bcm (\u22481.2\u20133.0 Mil)<\/td><td>Medium (12\/40) or Fine (20\/40)<\/td><td>PSPC minimum profile is actually relatively shallow \u2014 avoid Coarse grade unless tank condition is Grade D<\/td><\/tr>\n<tr><td>Epoxy coal tar (immersion zones)<\/td><td>3.5\u20135.5<\/td><td>Coarse (8\/16)<\/td><td>Thick-film coal tar system requires deep anchor for adequate adhesion<\/td><\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\n<h2 id=\"chloride\">7. Chloride Contamination and Salt Testing<\/h2>\n<p>Chloride contamination is the primary cause of premature coating failure in marine environments. Soluble chloride salts \u2014 present in seawater spray, marine atmospheric deposits, and residual sea growth \u2014 are hygroscopic and osmotically active under coating films, causing blistering and delamination even when the coating appears visually intact.<\/p>\n<p>Two sources of chloride contamination must be managed in hull blasting operations:<\/p>\n<ul style=\"font-family:Arial,sans-serif;font-size:15px;line-height:2;padding-left:22px;margin-bottom:18px\">\n  <li><strong>Substrate contamination:<\/strong> Chloride salts deposited on the hull during service accumulate in corrosion pits and cannot be fully removed by blasting alone. Post-blast Bresle patch testing is mandatory to confirm salt levels are within coating specification limits before application.<\/li>\n  <li><strong>Media-introduced chloride:<\/strong> Coal slag abrasive from certain sources may have elevated chloride content \u2014 particularly slag derived from coal burned in coastal plants where seawater cooling is used. For sensitive marine applications, request the supplier&#8217;s water extract conductivity test results (SSPC AB 1 limit: 1,000 \u03bcS\/cm) and verify chloride content is acceptable for the coating system specified.<\/li>\n<\/ul>\n\n<div class=\"hlh-box\">\n  <strong>Salt limit guidance:<\/strong> Most major antifouling coating manufacturers specify a maximum soluble salt contamination of 20\u201350 mg\/m\u00b2 NaCl equivalent on the blasted surface before coating application. IMO PSPC mandates 50 mg\/m\u00b2 for ballast tanks. If Bresle patch results exceed the limit, a freshwater pressure wash (minimum 2,000 psi) followed by re-verification is required before proceeding.\n<\/div>\n\n<h2 id=\"spent-media\">8. Spent Media Management in Dry Dock<\/h2>\n<p>Dry-dock blasting on a large commercial vessel generates 30\u2013160 tons of spent abrasive media, depending on vessel size, coating condition, and surface area. Management requirements:<\/p>\n<ul style=\"font-family:Arial,sans-serif;font-size:15px;line-height:2;padding-left:22px;margin-bottom:18px\">\n  <li>Collect spent media from dock floor using mechanical scrapers, vacuum trucks, or dedicated blast room floor sweep systems<\/li>\n  <li>Characterize the spent media waste \u2014 test for heavy metals if the vessel&#8217;s previous coating contained lead-based antifouling (common on older vessels pre-2001)<\/li>\n  <li>TCLP-passing coal slag spent media that has not contacted hazardous coatings qualifies as non-hazardous solid waste in most jurisdictions<\/li>\n  <li>Coordinate disposal with the port or shipyard&#8217;s approved waste management contractor \u2014 do not mix spent blast media with other shipyard waste streams without characterization<\/li>\n  <li>Retain disposal manifests and waste characterization documentation for the vessel&#8217;s maintenance records<\/li>\n<\/ul>\n\n<h2 id=\"alternatives\">9. When to Consider an Alternative Abrasive<\/h2>\n<p>Black Beauty coal slag is adequate for most commercial ship hull and superstructure blasting applications. Consider an alternative when:<\/p>\n<ul style=\"font-family:Arial,sans-serif;font-size:15px;line-height:2;padding-left:22px;margin-bottom:18px\">\n  <li><strong>Enclosed interior spaces (tanks, chain lockers, cofferdams):<\/strong> Garnet&#8217;s significantly lower dust generation reduces ventilation burden and worker exposure in enclosed volumes \u2014 particularly important in confined spaces where SAR air hose management is already complex<\/li>\n  <li><strong>IMO PSPC ballast tank work with strict salt limits:<\/strong> Some garnet grades offer verifiably lower chloride content than coal slag \u2014 useful when post-blast salt testing consistently shows elevated levels from coal slag media<\/li>\n  <li><strong>Very hard stainless or duplex steel hull components:<\/strong> Aluminum oxide is needed for profiling harder alloy steel components that coal slag cannot adequately scratch at Mohs 6\u20137<\/li>\n<\/ul>\n<p>Full comparison guides: <a class=\"hl\" href=\"https:\/\/hlh-js.com\/resource\/blog\/black-beauty-vs-garnet-abrasive-which-blasting-media-should-you-choose\/\" target=\"_blank\" rel=\"noopener\">Black Beauty vs. Garnet<\/a> \u00b7 <a class=\"hl\" href=\"https:\/\/hlh-js.com\/resource\/blog\/black-beauty-vs-copper-slag-a-complete-blasting-media-comparison\/\" target=\"_blank\" rel=\"noopener\">Black Beauty vs. Copper Slag<\/a><\/p>\n\n<hr class=\"hlh-divider\">\n<div class=\"hlh-back\">\n  <strong>Part of the Black Beauty Knowledge Series by Jiangsu Henglihong Technology Co., Ltd.<\/strong><br>\n  Return to overview: <a class=\"hl\" href=\"https:\/\/hlh-js.com\/resource\/blog\/black-beauty-abrasive-blasting-media-complete-buyers-guide\/\" target=\"_blank\" rel=\"noopener\">Complete Buyer&#8217;s Guide<\/a> \u00b7 Related: <a class=\"hl\" href=\"https:\/\/hlh-js.com\/resource\/blog\/black-beauty-blasting-media-safety-data-silica-dust-environmental-compliance\/\" target=\"_blank\" rel=\"noopener\">Safety &amp; Compliance<\/a> \u00b7 <a class=\"hl\" href=\"https:\/\/hlh-js.com\/resource\/blog\/using-black-beauty-abrasive-on-structural-steel-bridges-best-practices\/\" target=\"_blank\" rel=\"noopener\">Structural Steel Bridges<\/a>\n<\/div>\n<\/div>\n<\/div>\n\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What grade of Black Beauty is used for ship hull blasting?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Coarse grade (8\\\/16 mesh) Black Beauty is standard for underwater hull plating and ballast tank blasting, producing a 4.0\\u20136.0 Mil anchor profile at 100\\u2013120 psi. Medium grade (12\\\/40) is used for topsides and superstructure where a shallower profile is specified.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What SSPC cleanliness level is required for ship hull coating?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Most hull coating systems require SSPC-SP 10 Near-White Blast (NACE No. 2 \\\/ ISO Sa 2.5). IMO PSPC-compliant ballast tank coatings require Sa 2.5 as a minimum, with SP 5 (White Metal \\\/ Sa 3) often specified for severe service or deeply corroded tanks.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do you manage soluble salt contamination after blasting a ship hull?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Test blasted surfaces using Bresle patch sampling (ISO 8502-6) before coating application. If soluble salt exceeds the coating manufacturer's limit (typically 20\\u201350 mg\\\/m\\u00b2 NaCl equivalent), perform a freshwater pressure wash at minimum 2,000 psi, allow to dry, then re-test before proceeding.\"\n            }\n        }\n    ]\n}<\/script>","protected":false},"excerpt":{"rendered":"<p>Cluster D1 \u00b7 Application Scenario Black Beauty Blasting Media for  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":13362,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,177,138],"tags":[],"class_list":["post-13360","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-material","category-resource"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/posts\/13360","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=13360"}],"version-history":[{"count":2,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/posts\/13360\/revisions"}],"predecessor-version":[{"id":13363,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/posts\/13360\/revisions\/13363"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/media\/13362"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/media?parent=13360"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/categories?post=13360"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/de\/wp-json\/wp\/v2\/tags?post=13360"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}