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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The purchaser retains the right to perform any of the inspections and tests set forth in this speci? The revision addresses RoHS concerns and specifically allows non-hexavalent chromate treatments. It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages. When such areas are designated, and thus made subject to minimum thickness requirements, the purchaser and the manufacturer shall recognize the necessity for either thicker deposits on other areas or for special racking.
The sampling plan used for the inspection of the quality coated article shall be agreed upon between the purchaser and producer. Could you explain this? This applies to all metals. I’ve seen this done less commonly on chromated zinc plating than on chromated aluminum.
ASTM B-633 Type II vs. III zinc plating
The chromate, passivate, or supplemental? For example, a cold-rolled steel surface shall not be used to represent a hot-rolled steel surface. The coating shall not be stained or discolored.
Subject the selected samples to the salt spray test; the length of time to be applicable for the type of supplementary coating shall be in accordance with the requirements of 7. 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.
It does not cover electrodeposited zinccoated steel wire or sheets see Speci? Different brands of chromate conversion chemistry, possibly different plating processes acid zinc vs. Also, I found out that the casting is painted after plating. Don Penzenik – Elkhart, Indiana.
Zinc Plating: ASTM B Type II vs. III
Baked parts shall not crack or fail by fracture when tested in accordance with Yellow-iridescent Black Olive Green. These separate specimens shall be introduced into a lot at regular intervals before the cleaning operations, preliminary to electroplating, and shall not be separated therefrom until after completion of electroplating.
While the conditions of exposure and uses of electroplated metal are so varied that it is not de? A heavy chromate will shear under paint and cause the paint to peel. All I need to know is what color the types are. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Is this process done in the United States, and if so by whom? Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Our plater would like to go to a clear zinc, but our customer is under the assumption that the clear will not do as good a job with corrosion resistance and salt spray life. ASTM B and all other worldwide standards were written around frde time when no one spoke about trivalent.
Guide B provides a default plan if one is not speci? Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Put the chromate on light. III is colorless and not expected to hold up as long as the colored II.
The type of passivation is determined according to the required characteristics, and is divided into groups: From beautiful Pine Beach New Jersey: Surfaces to be painted should be ONLY lightly chromated.
As much as the last layer of the passivation is thin the electrical resistivity is low. Except as otherwise speci?
Does anybody know this info? To minimize problems of this sort, the speci? The Zinc asmt on astj steel does not last shiny for long, and so a further thick layer coating is added, called passivation. The rust not only harms the aesthetically smooth look, but also its mechanic needs. Can anyone give me some direction on how to get the customer to accept going to clear. Did you ever get the answers you were looking for?
For these reasons a?