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.
|Published (Last):||3 July 2016|
|PDF File Size:||15.37 Mb|
|ePub File Size:||5.85 Mb|
|Price:||Free* [*Free Regsitration Required]|
Iron metals rust relative quickly, even in a non-corrosive environment. The problem may not be with asrm-b633 chromate at all. A Iron or steel with zinc electroplate. In 24 years I have only been asked this question once before and I presume it involves phosphating over zinc plating for those heavy phosphating grammage applications, where normal phosphating will not provide enough zinc phosphate that is required in the deposit. Don Penzenik – Elkhart, Indiana.
That seems a asfm-b633 discretional to me. This applies to all metals. Best coating on aluminum for dyeing.
ASTM B-633 Type II vs. III zinc plating
As much as the last layer of the passivation is thin the electrical resistivity is low. It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages. Please forgive any resultant repetition or failures of chronological order.
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. Aluminum with low alloying elements will show practically no color change. Where maximum serviceability or special properties are required, consult metal finisher for best alloy choice. The ki is currently being produced in China and my local platers are suggesting a dye to get a blue color.
The type of passivation is determined according to the required characteristics, and is divided into groups:. Where corrosion resistance is important. SC 1 mild – Exposure to indoor atmospheres with rare condensation and minimum wear or abrasion. Our Zinc coating is carried out according to: Hi, I recently received 2 batches of parts from two separate platers using this specification. He passed away May 14, Smaller parts, including fasteners, hardware, and metal stampings can be efficiently and economically handled in Professional Plating’s Barrel Zinc Plating line.
So if I’m interpreting this correct, there is both a color difference and a salt spray difference. Most iii alloys depending on process used. The Standard default is gold for type II coatings unless otherwise specified.
III is colorless and not expected to hold up as long as the colored II.
To minimize your searching efforts and to offer multiple viewpoints, we’ve combined some threads into the dialog you’re viewing. Surfaces left-bare should be heavily chromated. The type of passivation is determined according to the required characteristics, and is divided into groups: High strength steels tensile strength greater than M. Class 1A astm-b63 conversion coatings are intended to provide corrosion prevention when left unpainted and to improve adhesion of paint finish systems to aluminum and aluminum alloys may be used for all surface treatments of tanks, tubing’s and component structures where interior paint finishes are not required.
Barrel Zinc – Finishes – Professional Plating Inc.
Corrosion resistance is a function of thickness. No, other colors may not be available if my presumption is right. 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. SC 4 very severe — Exposure to harsh conditions such as moisture, cleaners, saline solutions, and extreme wear.
Olive green and Black passivation is thick and has high electrical resistance. It still will have Hex Chrome. I’m not iu zinc plater, but ‘Type II Clear’ seems self-contradictory. Colorful RoHS compliance passivation gives corrosion resistance ability of hours according to ASTM B until white spots-also intended to parts used in a high corrosive environment —outdoor.
Color will vary with alloy. I need to specify platings that do not contain Hexavalent Chromium for parts that will be used in the automotive industry. Anodic-for high carbon martensitic steels.
Has a low coefficient of thermal expansion-is magnetic. Zinc plated components vary from one industry to another. Strict compliance with our Statistical Process Control ensures the quality of every barrel asm-b633 project we do.
At Professional Plating we are fully committed to meeting your asym-b633 for fine quality plating and prompt service. How do you know if it is supposed to be Zinc Yellow or Zinc Clear? To determine the nature of accuracy or revision level please verify above data with current releases: Yellow-iridescent Black Olive Green. Can be similar to stainless steel in color, or can be dull gray or light gray almost white color. Does plating make that big a difference knowing that it’s going to be painted also?
It would be ast-mb633, blue” — that is, shiny and metallic but with a bluish rather than a yellowish cast. Does anybody know this info? Going with clear will make it difficult to tell what is typpe chromated zinc vs.
Sorry, but if you need one particular look, you must go through the ugly process of maintaining sample boards with acceptable vs.