What do you say Our plater said that he would be willing to go thicker on the clear. No, other colors may not be available if my presumption is right.Īugust 31, A. Going with clear will make it difficult to tell what is clear chromated zinc vs. 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. High strength steels tensile strength greater than MPa shall not be electroplated. Supplementary treatments shall be in accordance with Recommended Practice B Try using an acid zinc chloride bath and see if the casting covers. Additional types have been added to permit non-chromate passivate treatments to be used in replacement of hexavalent chromium.Olive green and Black passivation is thick and has high electrical resistance. 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.ġ.4 This standard has been revised to address RoHS requirements that seek to limit the exposure of workers and the public from exposure to toxic metals. This standard does not purport to address all of the safety concerns, if any, associated with its use. It does not cover electrodeposited zinc-coated steel wire or sheets (see Specification A 591/A 591M for sheets).ġ.2 The coatings are provided in four standard thickness classes (4.1), in the as-plated condition or with one of three types of supplementary finish (4.2).ġ.3 High strength metals, unless otherwise specified, including high strength steels having a tensile strength greater than 1700 MPa (247 ksi R c 46) shall not be electroplated.
1.1 This specification covers requirements for electrodeposited zinc coatings applied to iron or steel articles to protect them from corrosion.
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