Standard Historical Last Updated: May 15, 2013 Track Document
ASTM B921-08

Standard Specification for Non-hexavalent Chromium Conversion Coatings on Aluminum and Aluminum Alloys

Standard Specification for Non-hexavalent Chromium Conversion Coatings on Aluminum and Aluminum Alloys B0921-08 ASTM|B0921-08|en-US Standard Specification for Non-hexavalent Chromium Conversion Coatings on Aluminum and Aluminum Alloys Standard new BOS Vol. 02.05 Committee B08
$ 66.00 In stock

Abstract

This specification covers the requirements relating to rinsed and non-rinsed non-hexavalent chromium conversion coatings on aluminum and aluminum alloys intended 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. Coatings are categorized into four classes according to corrosion protection and finish. The type of conversion coating depends on the composition of the solution and may also be affected by pH, temperature, duration of the treatment, and the nature and surface condition. Films are normally applied by dipping, but may also be applied by inundation, spraying, roller coating, or by wipe-on techniques. Coatings shall adhere to specified electrical resistance, adhesion, and corrosion resistance requirements.

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.

Price:
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Book of Standards Volume: 02.05
Developed by Subcommittee: B08.07
Pages: 2
DOI: 10.1520/B0921-08
ICS Code: 77.120.10