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ASTM B841 - 18(2024)

Standard Specification for Electrodeposited Coatings of Zinc Nickel Alloy Deposits

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Edition date: 2024-11-01
In Force
Available languages: English
Summary:

This specification covers the requirements for electrodeposited zinc nickel alloy coatings on metals. The zinc nickel coating shall be defined as Class 1. The five chromate conversion coating types shall be defined as follows: Type A shall be with colorless conversion coatings, Type B shall be with yellow iridescent conversion coatings, Type C shall be with bronze conversion coatings, Type D shall be with black chromate conversion coatings, and Type E shall be with any colors mentioned plus organic topcoat. The metal to be plated shall be free of flaws and defects that will be detrimental to the zinc alloy coating. It shall be subjected to such cleaning, pickling, and electroplating procedures as necessary to yield deposits. The coating shall be produced from an aqueous electroplating system that may be either an alkaline or acid formulation. The coating on all ready visible surfaces shall have an acceptable and characteristic appearance. The coating shall be adherent, free from blisters, pits, or discontinuities, and shall be free of cracks in the as plated state. The coating shall withstand normal handling and storage conditions without chipping, flaking, or other coating damage. The corrosion resistance of the coating shall be evaluated.
Keywords: coatings electrodeposited; corrosion resistant coatings; electrodeposited zinc nickel alloy plating; electroplating; zinc alloy; zinc nickel ;
Scope:

1.1 This specification covers the requirements for electrodeposited zinc nickel alloy coatings on metals.

1.2 The values stated in SI units are to be regarded as the standard.

1.3 The following precautionary statement pertains to the test method portion only, Section 8, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ICS: 25.220.40-Metallic coatings, 77.120.40-Nickel, chromium and their alloys
CTN: B08.06 - B08.06

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Anula a B0841-18

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Es referenciada por B1025 - 25

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