He is asking for more info on the difference between ASTM B [link by ed. to spec at TechStreet] type II and type III. Can anyone give me some direction on. ASTM B Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel. This specification covers requirements for electrodeposited. ASTM B Thickness classes for coatings: KEY: Classification #, Service condition, Thickness Fe/Zn 25, SC4 (very severe), 25um or ″ Fe/Zn 12, SC3.
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Electroplated springs and other puts subject to flexure sliall not be Ilcxed before the hydrogen embrittlement relief treatment. ASTM B and all other worldwide standards were written aetm the time when no one spoke about trivalent. The baking treatment shall be done before tlie application of the supplementary treatments and within 4 h of removal from the last process. Please forgive any resultant repetition or failures of chronological order. The part is currently being produced in China and my local platers are suggesting a dye to get a blue color.
Until a very few years ago chromate conversion coatings were based on hexavalent chromium, and deposited a thick film that was relatively easy axtm dye. Your comments are invited either for revislon of this standard or for additional standards and should be addressed to ASTM V633-11 Headquarters.
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Materials and Manufacture 6.
ASTM B-633 Type II vs. III zinc plating
Regards, Ted Mooney, P. Responsibility for Inspection S1. Rcfcrcnccd 1 ocuments 2. No, other colors may not be available if my presumption is right. Any information would be well received. If the document is revised wstm amended, you will be notified by email.
The end user must decide when a part fails, at “white rust” corrosion the chromate has failed or red rust both the chromate and the zinc are gone exposing the base metal. A superscript epsilon jr indicates an editorial change since the last revision or reapproval.
As the voice of the U. Sorry, but if you need one b633–11 look, you must go through the ugly process of maintaining sample boards ast acceptable vs. I’ve seen this done less b633-1 on chromated zinc plating than on chromated aluminum. It still will have Hex Chrome. Rest in peace, Ken. ASTM htemational takes no positron respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor serviceBastm.
Yellow chromate should get 96 hrs to failure. Fnr thesc reasons a flat test panel should be usai to evaluate the prwess capability and the angle should be controlled to cnsure consistent Ille: III is colorless and not expected to hold atm as long as the colored II.
A Iron or steel with zinc electroplate. Mark Hollenbeck alloys – Muskegon, Michigan A. But if you are looking for something indisputably blue, as asrm to clear with a possible slightly bluish cast, this probably requires dye.
IMC | Zinc Plating
What process variation would produce these different results? 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.
Not the least of which is the environmental regulations impact on the future of the selected finish. Is there any colour difference OR is there any Salt spray difference? To minimize your searching efforts and to offer multiple viewpoints, we’ve combined some threads into the dialog you’re viewing. As a result of large-scale and long-range tests conducted by ASTM and other organizations, tllere is excellent information on the corrosion behavior of zinc arid zinc coatings.
This standard is also available to be included in Standards Subscriptions. Also, I found out that the casting is painted after plating. The above entries are somewhat dated: Could you explain this? Standards Subsctiption may be the perfect solution. Thank you for your hard work which the finishing world continues to benefit from.
The separale specimens shall be ol’ a basis metal equivalent to that of the articles represented. Answer is based upon pre versions of B, The salt spray test operations, prelimirlary to electroplaling, and shall not be shall commence within 72 11 of the completion of the aging separated therefrom until after completion of electroplating.
Can anyone give me some direction on how to get the customer to accept going to clear. B633-11 Vlach – Goleta, California. Tlle following data, based on worldwide testing, can be used to coinpare the behavior of electrodeposited coatings of zinc in various atmospheres. To minimize problems of this sort, the specifications covering the basis matcrial on the item to be electroplated shall contain appropriate limitations to such basis metal conditions.
No it does not imply that. All I need to know is what color the types are.