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AMPP SSPC-SP 5-2026-NACE No. 1-2026

White Metal Blast Cleaning
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The SSPC-SP 5-2026-NACE No. 1-2026 joint standard is the ultimate rulebook for achieving the absolute highest level of industrial metal cleaning, officially known as White Metal Blast Cleaning.

The purpose behind this incredibly strict standard is to prepare carbon steel surfaces for high-performance coatings or linings that will face the harshest environments on Earth. When raw steel is manufactured or exposed to the elements, it develops a rough crust of "mill scale," rust, and chemical contaminants. If you apply a protective coating over even a microscopic speck of these impurities, the paint will eventually bubble and peel, leading to rapid rust and structural failure.

This standard requires 100% of all visible rust, old paint, and oxides to be entirely stripped away, leaving a uniformly white-gray metal surface. It is specified when the stakes are at their highest—like inside a chemical tank or deep underwater—where a coating must bond flawlessly to the metal to prevent a catastrophic leak.
SDO AMPP: Association for Materials Protection and Performance
Document Number SP 5 / No. 1
Publication Date May 20, 2026
Language en - English
Page Count 10
Revision Level
Supercedes
Committee
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