The problem may not be with the chromate at all. To calculate it is very difficult, as the plating is il few molecules thick. Specification covers standard recommendation practice for cleaning and de-scaling stainless steel parts, equipment and systems. It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages.ī Where service conditions are valid only for coatings with chromate conversion coating. The part is currently axtm-b633 produced in China and my local platers are suggesting a dye to get a blue color. This is not considered a decorative finish and will not generate matching parts. High strength steels tensile strength greater than M. Type III With supplementary colorless chromate treatment.īarrel Zinc – Finishes – Professional Plating Inc. Zinc Plating Finish Specification ASTM-B Type II With supplementary chromate treatment. Type II, Zinc coating with colorful chromate passivation, 96 hours 48 hours. ASTM B ELECTRODEPOSITED COATINGS OF ZINC ON IRON AND STEEL. Corrosion Resistance-Zinc coatings with Types II, III. chaser shall state ASTM B, the date of issue, service.
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