ASTM B Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel. Buy ASTM B SPECIFICATION FOR ELECTRODEPOSITED COATINGS OF ZINC ON IRON AND STEEL from SAI Global. ASTM B Type II and III zinc chromate plating Q&A’s. In my opinion a Mil-C- [link is to free spec at Defense Logistics Agency, ] plating.
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Your comments are invited either for revision b6633 this standard or for additional standards and should be addressed to ASTM International Headquarters. A heavy chromate will shear under paint and cause the paint to peel.
A number in parentheses indicates the year of last reapproval. Test Method B provides a default plan if one is not speci? For asrm, a cold-rolled steel surface shall not be used to represent a hot-rolled steel surface.
What process variation would produce these different results? Conditions affecting the electroplating of specimens, including the spacing, plating media, bath agitation, temperature, etc. I am not getting the difference between this. NOTE 1—Surfaces should be activated as soon as possible following baking and handled carefully freee avoid contamination and maintain an active surface for post processing. Different brands of chromate conversion chemistry, possibly b63 plating processes acid zinc vs.
If these heat treatments are not required, the purchaser shall specify in the ordering information their exception, 5. Electroplated springs and other parts subject to?
Thank you for your hard work which the finishing world continues to benefit from. Ray Kremer Stellar Solutions, Inc. But if you are looking for something indisputably blue, as opposed to clear with a possible slightly bluish cast, this probably requires dye.
Can anyone give me some direction on how to get the customer to accept going to clear. Current edition approved Jan. Atsm purchaser retains the right to perform any of the inspections and tests set forth in this speci? The separate specimens shall be of a basis metal equivalent to that of the articles represented.
Zinc Plating: ASTM B Type II vs. III
Our Zinc coating is carried out g633 to: There are different passivation colors: The black layer has also additional target —prevention of light reflection from the part and is used for optical parts. To minimize your searching efforts and to offer multiple viewpoints, we’ve combined some threads into the dialog you’re viewing. Responsibility for Inspection S1. This applies to all metals. As the USA moved toward metric fasteners, for a while there was a move to dye them blue. Trivalent chromates give paler and lighter finishes; some use metals, some use permanganates, some use dyes, in order to replicate the Hex finish.
Does plating make that big a difference knowing that it’s going to be painted also? Properly performed, statisitical process control will assure coated products of satisfactory quality and will assure the amount of acceptance inspection.
ASTM B-633 Type II vs. III zinc plating
III is colorless and not expected to hold up as long as the colored II. I need to specify platings that do not contain Hexavalent Chromium for parts that will be used in the automotive industry.
What type of zinc plating bath is your plater using?
Yellow-iridescent Black Olive Green. Hi, I recently received 2 batches of parts from two separate platers using this specification. These methods would include BBand B To me “bright blue” does not usually literally mean “bright blue” like the sky or a robin’s egg. frree
The procedure is known as sampling inspection. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? If you feel that your comments have not received a fair hearing aastm should make your views known to the ASTM Committee on Standards, at the address shown below.
The exterior visual determined according to last layer. Answer is based upon pre versions of B, It still will have Hex Chrome. Perhaps some confusion with Service Condition SC 2 moderatewhich indicates a minimum zinc thickness of 8 microns and is commonly clear chromated Type III. The coating shall not be stained or discolored.
It definitely implies Hex Chrome. Decorative charastreistics The exterior visual determined according to last layer. How do you know if it is supposed to be Zinc Yellow or Zinc Clear? NOTE 4—The dimensional tolerance of most threaded articles, such as nuts, bolts, screws, and similar fasteners with complementary threads, normally does not permit the application of a coating thickness much greater than 8.
The type of passivation is determined according to the required characteristics, and is divided into groups:.
Zinc plating is usually considered a functional coating, not a decorative one. BAztmBBand B Materials and Manufacture 6.