Coating specifications for protection of steel surfaces commonly contain requirements to generate a surface profile (to anchor the coating system to the substrate), within a range (minimum and maximum depth). In the future, specifications may also invoke a requirement to achieve a minimum peak density or peak count. In either case, the resulting profile or anchor pattern is quantified/semi-quantified according to one of the three methods described in ASTM D4417, Standard Test Methods for Field Measurement of Surface Profile of Blast Cleaned Steel, and peak count is quantified according to the method described in ASTM D7127, Standard Test Method for Measurement of Surface Roughness of Abrasive Blast Cleaned Metal Surfaces Using a Portable Stylus Instrument. The frequency and acceptability of the acquired measurements is described in SSPC-PA 17, Procedure for Determining Conformance to Steel Profile/Surface Roughness/Peak Count Requirements.

Subject
Abrasive blasting, Steel surfaces, Tape, Nozzles, Abrasives, Roughness, Garnet, Scale, Mineral abrasives, Surface profile, Steel grit, Cleaning, Peak density
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2017
Association for Materials Protection and Performance (AMPP)
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