Designation: B − Standard . chaser shall state ASTM B, the date of issue, service . Corrosion Resistance—Zinc coatings with Types II, III. ASTM B ELECTRODEPOSITED COATINGS OF ZINC ON IRON AND STEEL. Type II, Zinc coating with colorful chromate passivation, 96 hours 48 hours. 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.

Some of today’s proprietary trivalent chromium coatings are very thin and consequently will not generate a highly saturated color though. 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.

Different brands of chromate conversion chemistry, possibly different aatm-b633 processes acid zinc vs. With colored chromate conversion coatings; Type III: Ken Vlach – Goleta, California. 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. Class 3 Class typee chemical coatings are intended as a corrosion preventive film from electrical and electronic applications where low resistance contacts are required.

SC 1 mild – Exposure satm-b633 indoor atmospheres with rare condensation and minimum wear or abrasion. He passed away May 14, From beautiful Pine Beach New Jersey: It definitely implies Hex Chrome. I’m not a zinc plater, but ‘Type II Clear’ seems self-contradictory. I’ve seen this done less commonly on chromated zinc plating than on chromated aluminum. Trivalent chromates give paler and lighter finishes; some use metals, some use permanganates, some use dyes, in order to replicate the Hex finish.


Strict compliance with our Statistical Process Control ensures the quality of every barrel plating project we do. Could you explain this? Regards, Wstm-b633 Mooney, P. Minimum weight Type II coatings.

To me “bright blue” does not usually literally mean “bright blue” like the sky or a robin’s egg. Our Barrel Rype line is fully automated and digitally controlled with special programs, and individual recipes to manage cleaning, plating, and chromating operations.

Can be dyed in darker ik depending on thickness. ASTM B and all other worldwide standards were written around the time when no one spoke about trivalent.

Barrel Zinc

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

Best coating on aluminum for dyeing. Repair of mechanically damaged areas of anodic coatings conforming to MIL-A will provide effective means of reestablishing corrosion resistance but will not restore abrasion resistance of the anodic coating. You can get the same finish only for blue and black hex chrome with tri substitutes, but not for yellow or olive as of yet.

ASTM B-633 Type II vs. III zinc plating

The coating is made according to demand, where the distribution is as follows: Yellow-iridescent Black Olive Green. The above entries are somewhat dated: Corrosion resistance is good. adtm-b633


Nickel can be deposited soft or hard-dull or bright, depending on process used and conditions employed in plating. Corrosion Resistance Requirements Types.

Also, some yellow chromates are clear w. To prevent formation of case during. Soft, but is very ductile. SC 4 very severe — Exposure to harsh conditions such as moisture, cleaners, saline solutions, and extreme wear. Sorry, but if you need one particular look, you must go through the ugly process of maintaining sample boards with acceptable vs. So if I’m interpreting this correct, there is both a color difference and a salt spray difference.

The black layer has also additional target —prevention of light reflection from the part and is used for optical parts. The answer is Yes.

That seems a bit discretional to me. Thank you for your hard work which the finishing world continues to benefit from. All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer.

Asttm-b633 can exceed that of fused tin and in deposit shows excellent corrosion resistance and solder ability.

No, other colors may not be available if my presumption is right. Olive green and Black passivation is thick and has high electrical resistance. Certain castings are difficult, if not impossible, to plate in either cyanide or alkaline non-cyanide plating baths.