ASTM B921-08
Standard Specification for Non-hexavalent Chromium Conversion Coatings on Aluminum and Aluminum Alloys
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1. Scope
1.1 This specification covers the requirements relating to rinsed and non-rinsed non-hexavalent chromium conversion coatings on aluminum and aluminum alloys intended to give protection against corrosion and as a base for other coatings.
1.2 Aluminum and aluminum alloys are conversion coated in order to retard corrosion; as a base for organic films including paints, plastics, and adhesives; and as a protective coating having a low electrical contact impedance.
1.3 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 and health practices and determine the applicability of regulatory requirements prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
B117 Practice for Operating Salt Spray (Fog) Apparatus
B602 Test Method for Attribute Sampling of Metallic and Inorganic Coatings
D1730 Practices for Preparation of Aluminum and Aluminum-Alloy Surfaces for Painting
D3359 Test Methods for Rating Adhesion by Tape Test
Federal Standard
Fed. Std. No. 141 Paints, Varnish, Lacquer, and Related Materials; Methods of Inspection Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://dodssp.daps.dla.mil.ISO Standards
ISO 2409 Paint and VarnishesCross-Cut Test Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org. ISO 4519 Electrodeposited Metallic Coatings and Related FinishesSampling Procedures for Inspection by AttributesICS Code
ICS Number Code 77.120.10 (Aluminium and aluminium alloys)
UNSPSC Code
UNSPSC Code 11172000(Aluminum based alloys)
Referencing This Standard
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DOI: 10.1520/B0921-08
Citation Format
ASTM B921-08, Standard Specification for Non-hexavalent Chromium Conversion Coatings on Aluminum and Aluminum Alloys, ASTM International, West Conshohocken, PA, 2008, www.astm.org
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