Zinc [ASTM-B] This specification covers requirements for electrodeposited zinc coatings applied to iron or steel articles. ASTM B ELECTRODEPOSITED COATINGS OF ZINC ON IRON AND STEEL. The coating is made according to demand, where the distribution is as follows. 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).
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Our Zinc coating is carried out according to: So if atsm need to color match, you need to do it with a requirement for compliance with sample parts — not a verbal description.
Zinc coating with phosphate passivation.
Also, some yellow chromates are clear w. Did you ever get the answers you were looking for? Different brands of chromate conversion chemistry, possibly different plating processes acid b6333-85 vs. According to RoHS the homogeneous and non-homogeneous are defined in such manner that every one may understand that the layer is removable let’s see how. Mark Hollenbeck alloys – Muskegon, Michigan A. Try using an acid zinc chloride astj and see if the casting covers.
All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer.
Zinc coating with colorful RoHS compliance passivation. Going with clear will make it difficult to tell what is clear chromated zinc vs.
He passed away May 14, It does not cover zinc-coated wire or sheets. II says “colored chromate coatings” meeting 96 hours of salt spray, and Bb633-85 says “colorless chromate conversion coatings” meeting 12 hours of salt spray.
Zinc Plating: ASTM B Type II vs. III
Kaushik, Satm “Types” define supplementary finishes to be done after the plating. We are getting poor coverage on the as-cast surface atsm some steel castings using a yellow Zinc chromate. It would be “bright, blue” — that is, shiny and metallic but with a bluish rather than a yellowish cast. Zinc and Zinc alloys, such as zinc-nickel will surely play a more significant role as metals such as Cadmium are destined for the elements’ Valhalla.
Surfaces to be painted should be ONLY lightly chromated. Zinc plated components vary from one industry to another. I’ve seen this done less commonly on chromated zinc plating than on chromated aluminum. Is there any colour difference OR is there any Salt spray difference? From beautiful Pine Beach New Jersey: Regarding the question asked in letter ; Type II zinc plating vs.
A Iron or steel with zinc electroplate. It definitely implies Hex Chrome. The Zinc coating on the steel does not last shiny for long, and so a further thick layer coating is added, called passivation.
ASTM B-633 Type II vs. III zinc plating
Hi, I recently received 2 batches of parts from two separate platers using this specification. The type of passivation is determined according to the required characteristics, and is divided into groups:. Iron metals rust relative quickly, even in a non-corrosive environment. How do you know if it is supposed to be Zinc Yellow or Zinc Clear?
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. Olive Drab chromate is hrs.
ASTM B datasheet & applicatoin notes – Datasheet Archive
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.
To b633-5 “bright blue” does not usually literally mean “bright blue” like the sky or a robin’s egg. Is this process done in the United States, and if so by whom? I’m not a zinc plater, but ‘Type II Clear’ seems self-contradictory. The type of passivation is determined according to the required characteristics, and is divided into sstm A light yellow would be better than a clear.
I need to specify platings that do not contain Hexavalent Chromium for parts that will be used in the automotive industry. The rust not only harms the aesthetically smooth look, but also its mechanic needs.
Yellow chromate should get 96 hrs to failure. To minimize your searching efforts and to offer multiple viewpoints, we’ve combined some threads into the dialog you’re viewing.