In electrogalvanised objects adhering to ASTM A90-90M :1995 standards is the passivation hexavalent or tri?
Answer:
A90/A90M|1|A653/A653M|Specific... for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process|ASTM Standards
A90/A90M|1|A792/A792M|Specific... for Steel Sheet, 55 % Aluminum-Zinc Alloy-Coated by the Hot-Dip Process|ASTM Standards
A90/A90M|1|A875/A875M|Specific... for Steel Sheet, Zinc-5 % Aluminum Alloy-Coated by the Hot-Dip Process|ASTM Standards
A90/A90M|1|D1193|Specification for Reagent Water|ASTM Standards
A90/A90M|1|E29|Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications|ASTM Standards
A90/A90M|1|E691|Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method|ASTM Standards
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