Testing Patches Measure Contamination on Blast-Cleaned Steel

Paul N. Gardner Co.’s Bresle Patches are latex- and chloride-free testing products designed to measure contamination of water-soluable salts and corrosion on blast-cleaned steel.

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Paul N. Gardner Co.’s Bresle Patches are latex- and chloride-free testing products designed to measure contamination of water-soluable salts and corrosion on blast-cleaned steel. These compounds are said to be almost colorless and are localized at the lowest point of the rust pits. If they are not removed prior to painting, the company says, chemical reactions can result in blister formation and accumulations of rust that destroy the adhesion between the substrate and the applied protective coating.

The patches also can be used to test non-metallic abrasives for water-soluble salts and corrosion products. Higher-adhesion-strength Bresle Patches Plus are available for testing on corroded or coarse-grade blasted steel.

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