{"id":13221,"date":"2026-05-28T01:50:47","date_gmt":"2026-05-28T01:50:47","guid":{"rendered":"https:\/\/hlh-js.com\/?p=13221"},"modified":"2026-05-28T01:50:47","modified_gmt":"2026-05-28T01:50:47","slug":"sand-blasted-surface-inspection-acceptance-visual-profile-cleanliness","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/fr\/resource\/blog\/sand-blasted-surface-inspection-acceptance-visual-profile-cleanliness\/","title":{"rendered":"Sand Blasted Surface Inspection &amp; Acceptance: Visual + Profile + Cleanliness"},"content":{"rendered":"<div class=\"hlh-art\">\n\n<style>\n  .hlh-art {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", \"Helvetica Neue\", Arial, sans-serif;\n    color: #1f2a37; line-height: 1.72; font-size: 16.5px;\n    max-width: 1080px; margin: 0 auto; padding: 0 4px; box-sizing: border-box;\n  }\n  .hlh-art *, .hlh-art *::before, .hlh-art *::after { box-sizing: border-box; }\n  .hlh-art h1, .hlh-art h2, .hlh-art h3, .hlh-art h4 {\n    color: #0f3057; 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border: none; margin-top: 0; font-size: 1.45rem; position: relative; padding: 0; }\n  .hlh-art-cta p { color: #d6dee8; max-width: 620px; margin: 8px auto 22px; position: relative; }\n  .hlh-art-cta-button {\n    display: inline-block; background: #e8782e; color: #fff !important;\n    padding: 13px 32px; border-radius: 50px; font-weight: 700;\n    font-size: 0.98rem; border: none !important;\n    box-shadow: 0 8px 22px rgba(232,120,46,0.35); position: relative;\n    transition: all 0.2s ease;\n  }\n  .hlh-art-cta-button:hover { background: #c75d12; color: #fff !important; transform: translateY(-2px); }\n\n  .hlh-art-pillarback {\n    background: #eef3f9; border-left: 4px solid #0f3057;\n    padding: 16px 22px; border-radius: 6px; margin: 24px 0;\n    font-size: 0.95rem;\n  }\n  .hlh-art-pillarback strong { color: #0f3057; }\n\n  @media (max-width: 780px) {\n    .hlh-art { font-size: 16px; }\n    .hlh-art h1, .hlh-art-hero h1 { font-size: 1.7rem; }\n    .hlh-art h2 { font-size: 1.3rem; }\n    .hlh-art-hero { padding: 30px 22px; }\n    .hlh-art-toc ol { columns: 1; }\n    .hlh-art-steps { grid-template-columns: repeat(2, 1fr); }\n    .hlh-art-grid2, .hlh-art-grid3, .hlh-art-related-grid { grid-template-columns: 1fr; }\n    .hlh-art-cta { padding: 30px 22px; }\n  }\n<\/style>\n\n<section class=\"hlh-art-hero\">\n  <div class=\"hlh-art-meta-row\">\n    <span class=\"hlh-art-tag\">Quality Control<\/span>\n    <span class=\"hlh-art-date\">Published &middot; May 2026<\/span>\n  <\/div>\n  <h1>Sand Blasted Surface Inspection &#038; Acceptance: Visual + Profile + Cleanliness<\/h1>\n  <p class=\"hlh-art-lede\">Defensible acceptance of a sand blasted surface follows a three-axis framework: visual cleanliness, profile depth, and contamination testing. This guide presents the inspection workflow, documentation chain, and rejection procedures used on industrial coating projects.<\/p>\n<\/section>\n\n<aside class=\"hlh-art-summary\">\n  <h2>Key Takeaways<\/h2>\n  <ul>\n    <li>Three inspection axes: visual cleanliness against ISO 8501-1, profile measurement per ASTM D4417, cleanliness testing per ISO 8502 series.<\/li>\n    <li>Documentation chain links blast batch, inspector, time, conditions, and acceptance decision.<\/li>\n    <li>Standard inspection frequency: visual per panel, profile per 25 m\u00b2, chloride per 100 m\u00b2.<\/li>\n    <li>Rejection procedure must be defined in the specification \u2014 typically re-blast at supplier cost.<\/li>\n  <\/ul>\n<\/aside>\n\n<nav class=\"hlh-art-toc\" aria-label=\"Table des mati\u00e8res\">\n  <h2>Table of Contents<\/h2>\n  <ol>\n    <li><a href=\"#intro\">The Three-Axis Inspection Framework<\/a><\/li>\n    <li><a href=\"#visual\">Axis 1: Visual Cleanliness Inspection<\/a><\/li>\n    <li><a href=\"#profile\">Axis 2: Profile Measurement<\/a><\/li>\n    <li><a href=\"#cleanliness\">Axis 3: Surface Cleanliness Testing<\/a><\/li>\n    <li><a href=\"#documentation\">Documentation Chain<\/a><\/li>\n    <li><a href=\"#rejection\">Non-Conformance and Rejection Procedure<\/a><\/li>\n  <\/ol>\n<\/nav>\n\n<section id=\"intro\" class=\"hlh-art-section\">\n  <h2>The Three-Axis Inspection Framework<\/h2>\n  <p>A sand blasted surface that satisfies one inspection criterion can still fail the others. A surface may look clean but have insufficient profile depth; it may have proper profile but contain embedded salt contamination; it may pass salt testing but be visibly shadowed. Acceptance therefore requires verification across all three axes:<\/p>\n\n<ol>\n  <li><strong>Visual cleanliness<\/strong> \u2014 assessed against reference photographs in ISO 8501-1 or SSPC visual standards.<\/li>\n  <li><strong>Profile depth<\/strong> \u2014 measured with replica tape (ASTM D4417 Method C) or profilometer (ISO 4287).<\/li>\n  <li><strong>Surface cleanliness<\/strong> \u2014 soluble salt contamination (ISO 8502-6), dust contamination (ISO 8502-3).<\/li>\n<\/ol>\n\n<p>This guide presents the workflow for each axis. For the underlying specifications, see the <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface\/\" target=\"_blank\" rel=\"noopener\">pillar guide on sand blasted surface<\/a>.<\/p>\n<\/section>\n\n<section id=\"visual\" class=\"hlh-art-section\">\n  <h2>Axis 1: Visual Cleanliness Inspection<\/h2>\n  <p>Visual inspection compares the blasted surface against reference photographs in ISO 8501-1 (international) or SSPC VIS 1 (US). The reference plates show the four cleanliness grades (Sa 1 through Sa 3) at original starting conditions A, B, C, and D.<\/p>\n\n<div class=\"hlh-art-table-wrap\">\n<table>\n  <thead><tr><th>Starting Condition<\/th><th>Description<\/th><\/tr><\/thead>\n  <tbody>\n    <tr><td>A<\/td><td>Mill scale, no rust<\/td><\/tr>\n    <tr><td>B<\/td><td>Rusting beginning, mill scale flaking<\/td><\/tr>\n    <tr><td>C<\/td><td>Mill scale rusted away, light pitting<\/td><\/tr>\n    <tr><td>D<\/td><td>Mill scale rusted away, heavy pitting<\/td><\/tr>\n  <\/tbody>\n<\/table>\n<\/div>\n\n<p>The inspector compares the blasted surface to the photograph matching the original condition. Acceptance is by visual judgment \u2014 there is no numerical visual score. The complete map of standards is in our <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sspc-sp5-sp6-sp10-vs-iso-sa-1-sa-2-sa-2-5-sa-3-complete-cross-reference\/\" target=\"_blank\" rel=\"noopener\">SSPC vs ISO Sa cross-reference<\/a>.<\/p>\n\n<div class=\"hlh-art-callout hlh-art-callout-tip\">\n  <div class=\"hlh-art-callout-title\">Lighting Matters<\/div>\n  <p>Visual inspection requires adequate illumination \u2014 typically 500 lux minimum directly on the surface. Raking light (low angle) dramatically improves the visibility of shadowing, embedment, and texture irregularities that direct overhead lighting hides.<\/p>\n<\/div>\n<\/section>\n\n<section id=\"profile\" class=\"hlh-art-section\">\n  <h2>Axis 2: Profile Measurement<\/h2>\n  <p>Profile measurement quantifies the anchor pattern depth. The dominant field method is replica tape (Press-O-Film \/ Testex) per ASTM D4417 Method C; laboratory and high-precision work uses stylus or optical profilometers per ISO 4287. Method details are in our reference on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-measure-sand-blasted-surface-profile-replica-tape-comparator-stylus\/\" target=\"_blank\" rel=\"noopener\">how to measure sand blasted surface profile<\/a>.<\/p>\n\n<p>Standard inspection frequency:<\/p>\n\n<ul>\n  <li><strong>At minimum:<\/strong> 1 measurement at start of each blast shift<\/li>\n  <li><strong>Routine:<\/strong> 1 measurement per 25 m\u00b2 of blasted surface<\/li>\n  <li><strong>Critical applications:<\/strong> 1 per 10 m\u00b2 (tank linings, ballast, immersion)<\/li>\n  <li><strong>A\u00e9rospatiale :<\/strong> 100% inspection<\/li>\n<\/ul>\n<\/section>\n\n<section id=\"cleanliness\" class=\"hlh-art-section\">\n  <h2>Axis 3: Surface Cleanliness Testing<\/h2>\n  <p>Beyond visual cleanliness, two contamination tests are commonly required:<\/p>\n\n<h3>Soluble salt (chloride) contamination \u2014 ISO 8502-6<\/h3>\n<p>The Bresle method uses an adhesive patch containing deionized water that extracts soluble salts from the surface. Extracted water is measured for conductivity (total dissolved solids) or chloride concentration directly. Typical acceptance limits: 30\u201350 mg\/m\u00b2 chloride for atmospheric service, 20 mg\/m\u00b2 for immersion service.<\/p>\n\n<h3>Dust contamination \u2014 ISO 8502-3<\/h3>\n<p>An adhesive tape is pressed against the blasted surface and compared to reference photographs showing dust quantity classes (0\u20135) and particle size classes (1\u20135). Most coating specifications require Class 2 or better.<\/p>\n<\/section>\n\n<section id=\"documentation\" class=\"hlh-art-section\">\n  <h2>Documentation Chain<\/h2>\n  <p>Each inspection should be documented in a QC log that captures:<\/p>\n\n<ul>\n  <li>Date, time, ambient temperature, relative humidity<\/li>\n  <li>Inspector name and qualification<\/li>\n  <li>Workpiece identification, area inspected<\/li>\n  <li>Blast media batch (link to supplier MTR)<\/li>\n  <li>Measurement results (visual grade, profile depth, salt\/dust readings)<\/li>\n  <li>Pass\/fail determination and any non-conformance actions<\/li>\n<\/ul>\n\n<p>This chain supports warranty claims, dispute resolution, and audit by third parties (insurance, classification societies, regulatory bodies).<\/p>\n<\/section>\n\n<section id=\"rejection\" class=\"hlh-art-section\">\n  <h2>Non-Conformance and Rejection Procedure<\/h2>\n  <p>A defensible specification (see our template on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-write-a-sand-blasted-surface-spec-for-suppliers-free-template\/\" target=\"_blank\" rel=\"noopener\">how to write a sand blasted surface spec for suppliers<\/a>) defines the rejection procedure before work begins. Standard provisions:<\/p>\n\n<ul>\n  <li>Non-conforming areas are re-blasted at supplier&#8217;s cost prior to coating<\/li>\n  <li>Repeated non-conformance on the same project is grounds for contract review<\/li>\n  <li>Re-inspection of remediated areas follows the same protocol as initial inspection<\/li>\n  <li>Disputes referred to a third-party qualified inspector (NACE\/AMPP certified, FROSIO certified, or equivalent)<\/li>\n<\/ul>\n\n<p>Common defects encountered during inspection are catalogued in our reference on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/common-sand-blasted-surface-defects-shadowing-embedment-flash-rust\/\" target=\"_blank\" rel=\"noopener\">common sand blasted surface defects<\/a>.<\/p>\n<\/section>\n\n<aside class=\"hlh-art-pillarback\">\n  <strong>Looking for the complete picture?<\/strong> This article is part of our broader resource on sand blasted surface specification, standards, and applications. Read the full <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface\/\" target=\"_blank\" rel=\"noopener\">pillar guide to sand blasted surface<\/a> for the complete process, Ra\/Rz reference, four-standard cross-reference, and material-by-material guidance.\n<\/aside>\n\n<section class=\"hlh-art-related\">\n  <h3>Related Articles<\/h3>\n  <div class=\"hlh-art-related-grid\">\n    <div class=\"hlh-art-related-card\">\n      <a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-measure-sand-blasted-surface-profile-replica-tape-comparator-stylus\/\" target=\"_blank\" rel=\"noopener\">How to Measure Sand Blasted Surface Profile<\/a>\n    <\/div>\n    <div class=\"hlh-art-related-card\">\n      <a href=\"https:\/\/hlh-js.com\/resource\/blog\/common-sand-blasted-surface-defects-shadowing-embedment-flash-rust\/\" target=\"_blank\" rel=\"noopener\">Common Sand Blasted Surface Defects<\/a>\n    <\/div>\n    <div class=\"hlh-art-related-card\">\n      <a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-write-a-sand-blasted-surface-spec-for-suppliers-free-template\/\" target=\"_blank\" rel=\"noopener\">How to Write a Sand Blasted Surface Spec for Suppliers<\/a>\n    <\/div>\n    <div class=\"hlh-art-related-card\">\n      <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sspc-sp5-sp6-sp10-vs-iso-sa-1-sa-2-sa-2-5-sa-3-complete-cross-reference\/\" target=\"_blank\" rel=\"noopener\">SSPC vs ISO Sa Complete Cross-Reference<\/a>\n    <\/div>\n  <\/div>\n<\/section>\n\n<section id=\"faq\" class=\"hlh-art-section hlh-art-faq\">\n  <h2>Questions fr\u00e9quemment pos\u00e9es<\/h2>\n  <details>\n    <summary>How is a sand blasted surface inspected?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>Across three axes: visual cleanliness against ISO 8501-1 photographs, profile depth measured per ASTM D4417 Method C (replica tape) or ISO 4287 (profilometer), and surface cleanliness via salt (Bresle) and dust (tape lift) tests.<\/p><\/div>\n  <\/details>\n  <details>\n    <summary>How often should I inspect a sand blasted surface?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>Industry practice ranges from per-panel visual inspection to 1 profile measurement per 25 m\u00b2 and 1 chloride test per 100 m\u00b2. Critical applications (tank linings, immersion) require more frequent inspection; aerospace requires 100% inspection.<\/p><\/div>\n  <\/details>\n  <details>\n    <summary>What lighting is required for visual inspection?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>500 lux minimum directly on the surface. Raking (low-angle) light dramatically improves visibility of shadowing, embedment, and texture defects. Daylight equivalent (5,500 K) is recommended for color accuracy when comparing to reference photographs.<\/p><\/div>\n  <\/details>\n  <details>\n    <summary>Who is qualified to inspect a sand blasted surface?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>Qualified inspectors typically hold certifications from NACE\/AMPP (Coating Inspector Program, CIP), FROSIO (Norwegian Council for Education of Surface Treatment Operators), ICorr (Institute of Corrosion), or equivalent. Project specifications should call out the required qualification.<\/p><\/div>\n  <\/details>\n  <details>\n    <summary>What happens if a blasted surface fails inspection?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>Per specification, non-conforming areas are typically re-blasted at the supplier&#8217;s cost prior to coating. The rejection procedure should be defined in the specification before work begins. Repeated non-conformance may trigger contract review.<\/p><\/div>\n  <\/details>\n<\/section>\n\n<section class=\"hlh-art-cta\">\n  <h2>Request an Abrasive Blasting Media Sample<\/h2>\n  <p>Jiangsu Henglihong Technology Co., Ltd. supplies certified aluminum oxide, garnet, glass bead, steel grit, and steel shot to global industrial buyers. Request a sample with full batch documentation for technical evaluation.<\/p>\n  <a class=\"hlh-art-cta-button\" href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Request a Sample &rarr;<\/a>\n<\/section>\n\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@graph\": [\n        {\n            \"@type\": \"Article\",\n            \"headline\": \"Sand Blasted Surface Inspection & Acceptance: Visual + Profile + Cleanliness\",\n            \"description\": \"Defensible acceptance of a sand blasted surface follows a three-axis framework: visual cleanliness, profile depth, and contamination testing. 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Repeated non-conformance may trigger contract review.\"\n                    }\n                }\n            ]\n        }\n    ]\n}<\/script>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Quality Control Published &middot; May 2026 Sand Blasted Surface Inspection  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":13242,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,175,138],"tags":[],"class_list":["post-13221","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-industry","category-resource"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/13221","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/comments?post=13221"}],"version-history":[{"count":2,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/13221\/revisions"}],"predecessor-version":[{"id":13223,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/13221\/revisions\/13223"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/media\/13242"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/media?parent=13221"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/categories?post=13221"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/tags?post=13221"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}