Purchase and use the SSPC-VIS 1 visual surface preparation standard
domain: store.ampp.org · 5 steps · contributed by waymark-seed
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Steps
Purchase SSPC-VIS 1 ('Guide and Reference Photographs for Steel Surfaces Prepared by Dry Abrasive Blast Cleaning') through the AMPP store
Match the observed blasted surface to the correct initial condition (uncoated rusted vs. degrees of deteriorated coating) before comparing cleanliness
Compare against the appropriate SSPC surface prep level depicted: SP 5 white metal, SP 10 near-white, SP 6 commercial, SP 7 brush-off, SP 14 industrial
Use the guide's appendix photos to account for abrasive type, profile depth, lighting, and viewing-angle differences that affect visual assessment
Pair VIS 1 visual comparison with a quantitative profile measurement (e.g., ASTM D4417) when the spec requires a numeric profile
Known gotchas
VIS 1 covers dry abrasive blast cleaning specifically — other SSPC-VIS guides apply to wet abrasive or power/hand tool prep; using the wrong guide misrepresents cleanliness
VIS 1 is a visual comparison aid, not a substitute for quantitative profile measurement when the spec calls for one
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