Zinc [ASTM-B] This specification covers requirements for electrodeposited zinc coatings applied to iron or steel Types, Test Period (Hours.) II, III, Designation: B − Standard . chaser shall state ASTM B, the date of issue, service . Corrosion Resistance—Zinc coatings with Types II, III. Zinc Plating Finish Specification ASTM-B Type II With supplementary chromate treatment. Type III With supplementary colorless chromate treatment.

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Barrel Zinc – Finishes – Professional Plating Inc.

Registered to ISO Trivalent chromates give paler and lighter finishes; some use metals, some use permanganates, some typee dyes, in order to replicate the Hex finish. Going with clear will make it difficult to tell what is clear chromated zinc vs. It definitely implies Hex Chrome. III zinc plating An ongoing discussion from through So if I’m interpreting this correct, there is both astm-b63 color difference and a salt spray difference.

ASTM B-633 Type II vs. III zinc plating

Color will vary with alloy. You can get the same finish only for blue and black hex chrome with tri substitutes, but not for astm-b363 or olive as of yet.

The above entries are somewhat dated: Olive Drab chromate is hrs. The rust not only harms the aesthetically smooth look, but also its mechanic needs.

Most aluminum alloys depending on process used. Try using an acid zinc chloride bath and see if the casting covers. Also, some yellow chromates are clear w.


Specification covers standard recommendation practice for cleaning and de-scaling stainless steel parts, equipment and systems. Minimum weight Type II coatings. As specified on drawing. Corrosion resistance is a function of thickness.

Some of today’s proprietary trivalent chromium ij are very thin and consequently will not generate a highly saturated color though. Until a very few years ago ik conversion coatings were based on hexavalent chromium, and deposited a thick film that was relatively easy to dye. Colorless RoHS compliance passivation gives corrosion resistance ability of 72 hours according to ASTM B until white spots-also intended to parts used in a high corrosive environment —outdoor.

I have the exact same astm-b633. Zinc ASTM-B This specification covers requirements for electrodeposited zinc coatings applied to iron or steel articles to protect them from corrosion. As much as the last layer of the passivation is thin the electrical resistivity is low. At Professional Plating we are fully committed to meeting your axtm-b633 for fine quality plating and prompt service. SC 1 mild – Exposure to indoor atmospheres with rare condensation and minimum wear or abrasion.

All parts with ultimate tensile strength M. Obviously, this must be clarified by the customer. Solder ability is excellent. The black layer has also additional target —prevention of light reflection from the part and adtm-b633 used for optical parts.

Could you explain this? Does plating make that big a difference knowing that it’s going to be painted also? Available colors are iridescent and black Colorless chromate passivation gives corrosion resistance ability of 12 hours according to ASTM B until white spots-intended to parts used in a light corrosive environment —indoor.


Can be used as an electrical insulation coating. What type of zinc plating bath is your plater using? Anodic-for high carbon martensitic steels. Thickness Classes for Coatings: The part is currently being produced in China and my local platers are suggesting a dye to get a blue color.

This applies to all metals. 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. Zinc plating is usually considered a functional coating, not a decorative one.

Barrel Zinc

Numeral indicates thickness in micrometers. It would be “bright, blue” — that is, shiny and metallic but with a bluish rather than a yellowish cast. Is there any colour difference OR is there any Astm-h633 spray difference? Hello Claudio and Doug, My compliments for an excellent round of questions!

Where maximum serviceability or special properties are required, consult metal finisher for best alloy choice. Rest in peace, Ken. For steels containing large amounts 0. So if you 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.