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Clear & Yellow zinc plating 1

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rubepierre

rubepierre

Industrial
Dec 15, 2001
30
still having trouble getting the facts straight. . .
Is type II colorless (clear) and type III yellow (with added chromates?)
I beseech thee....for clarification. . . . .
 
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According to ASTM B 633 Standard Specfication for Electrodeposited Coatings of Zinc on Iron and Steel, there are four "types":

Type I - As-plated without supplementary treatment

Type II - With colored chromate conversion coatings

Type III - With colorless chromate conversion coatings

Type IV - With phosphate conversion coatings

I recommend you obtain a copy of this document if you intend to specify these types of coatings. It is available directly from ASTM at
 
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