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ASTM B633 13 PDF

ASTM B Type II and III zinc chromate plating Q&A’s. greater corrosion resistance is required, e.g., for SC3 & SC4 (13 & 25 microns zinc, respectively). Blue/Zinc. Blue/Zinc. Yellow/Zinc. Yellow/Zinc. ASTM B Type II SC 3 (FE/ZN 13). Type II SC 2 (FE/ZN 8). Type II SC 1 (FE/ZN 5). Type III SC 3(FE/ZN 13). ASTM A/AM Low and Intermediate Tensile Strength Carbon Steel Plates .. ASTM B Electrodeposited Coatings of Zinc on Iron and Steel.

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Regarding the question asked in letter ; Type II zinc plating vs. Ray Kremer Stellar Solutions, Inc. This is not considered a decorative finish and will not generate matching parts. Please forgive any resultant repetition asrm failures of chronological order. Zinc coating with colorful chromate passivation.

ASTM B-633 Type II vs. III zinc plating

Could you explain this? I have the exact same questions. It still will have Hex Chrome. Decorative charastreistics The exterior visual determined according to last layer. Certain castings are difficult, if not impossible, to plate in either cyanide or alkaline non-cyanide plating baths.

Is there any colour difference OR is there any Salt spray difference? What process variation would produce these different results? Regards, Ted Mooney, P. The problem may not be with the chromate at all.

Zinc Plating: ASTM B Type II vs. III

Don Penzenik – Elkhart, Indiana. What type of zinc plating bath is your plater using? Mark Hollenbeck alloys – Muskegon, Michigan A.


The end user must decide when a part fails, at “white rust” 133 the chromate has failed or red rust both the chromate and the zinc are gone exposing the base metal. Zinc coating with colorful RoHS compliance passivation. Iridescent and Colorless passivation is thin and has low electrical resistance. Our plater said that he would be willing to go thicker on the clear.

Electrical charasteristics As much as the last layer of the passivation is thin the electrical resistivity is low.

II says “colored chromate coatings” meeting 96 hours of salt spray, and III says “colorless chromate conversion coatings” meeting 12 hours of salt spray.

Obviously, this must be clarified bb633 the customer. Trivalent chromates give paler and lighter finishes; 6b33 use metals, some use permanganates, some use dyes, in order to replicate the Hex finish. The part is currently being produced in China and my local platers are suggesting a dye to get a blue color.

How do you know if it is supposed to be Zinc Yellow or Zinc Clear?

Olive Drab chromate is hrs. Zinc coating with colorless RoHS compliance passivation. Surfaces left-bare should be heavily chromated. Rest in peace, Ken. So if I’m interpreting this correct, there is both a color difference and v633 salt spray difference. Go to main content. The Standard default is gold for type II coatings unless otherwise specified. It would be “bright, blue” — g633 is, shiny and metallic but with a bluish rather than a yellowish cast.

Try using an acid zinc chloride bath and see if the casting covers. Our Zinc coating is carried out according to: Olive green and Black passivation is thick and has high electrical resistance. So if you need to color match, you need to do it with a requirement for compliance with sample astn — not a verbal description.


No it does zstm imply that. Zinc coating with phosphate passivation. As much as the last layer of the passivation is thin the electrical resistivity is low. The coating is made according to demand, where the distribution is as follows: Put the chromate on light.

The rust not only harms the aesthetically smooth look, but also its mechanic needs. Also, I found out that the casting is painted after plating. Olive green passivation is a chromate passivation in a green hue that gives excellent corrosion resistance ability hours in a salt spray b363 and is a good base for paint.

But if you are looking for something indisputably blue, as opposed to clear with a possible slightly bluish cast, this probably requires dye. Also, some yellow chromates are clear w. No, other colors may not be available if my presumption is right. All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer.

Going with clear will make it difficult to tell what is clear h633 zinc vs.