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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Olive green passivation is a chromate passivation in a green hue that gives excellent corrosion resistance ability hours in a salt spray test and is a good base for paint.
The type of passivation is determined according to the required characteristics, and is divided into groups: Rest in peace, Ken. Don Penzenik – Elkhart, Indiana.
No it does not imply that. The coating is made according to demand, where the distribution is as follows: Hi, I recently received 2 batches of parts from two separate platers using this specification.
III is colorless and not expected to hold up as long as the colored II. Astmm rust not only harms the aesthetically smooth look, but also its mechanic needs. B6333 Blue with pale yellow is the best replacement for yellow as of now. Zinc coating with colorless RoHS compliance passivation.
Our plater would like to go to a clear zinc, but our customer is under the assumption that the clear will not do as good a job with corrosion resistance and salt spray life. We are getting poor coverage on the as-cast surface of some steel castings using a yellow Zinc chromate.
ASTM B-633 Type II vs. III zinc plating
I will be attending the ASTM B8 committee meetings in Philly later this week and will mention this letter to the sub-committee chair responsible for the B spec. Olive Drab chromate is hrs. August 31, A. But if you are looking for something indisputably blue, as opposed to clear with a possible slightly bluish cast, this probably requires dye.
Put the chromate on light. Ray Kremer Stellar Solutions, Inc.
Zinc coating with colorful RoHS compliance passivation. Surfaces left-bare should be heavily chromated. Zinc coating with phosphate passivation.
To minimize your searching efforts and to offer awtm viewpoints, we’ve combined some threads into the dialog you’re viewing. He passed away May 14, Surfaces to be painted should be ONLY lightly chromated.
ASTM B – 13 Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel
As much as the last layer of the passivation is thin the electrical resistivity is low. That seems a bit discretional to me. Until a very few years ago chromate conversion coatings n633 based on hexavalent chromium, and deposited a thick film that was relatively easy to dye.
Regards, Ted Mooney, P. All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer. Colorful chromate passivation gives corrosion resistance ability of 96 hours according to ASTM B until white spots-intended to parts used in a high corrosive environment —outdoor.
Zinc Plating: ASTM B Type II vs. III
I’m not a zinc plater, but ‘Type II Clear’ seems self-contradictory. Also, some yellow chromates are clear w. This applies to all metals. Obviously, this must be clarified by the customer. There are different passivation colors: It definitely implies Hex Chrome.
Is this process done in the United States, and if so by whom? Answer is based upon pre versions of B, Also, I found out that the casting is painted after plating.