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ASTM B449-93(2004)

Historical Reaffirmation

Standard Specification for Chromates on Aluminum

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1.1 This specification covers the requirements relating to rinsed and nonrinsed chromate conversion coatings on aluminum and aluminum alloys intended to give protection against corrosion and as a base for other coatings. This edition of the specification has been coordinated with ISO 10546 and is technically equivalent.

1.2 Aluminum and aluminum alloys are chromate 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 problems, 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 limitations prior to use.


This specification covers the requirements relating to rinsed and non rinsed chromate conversion coatings on aluminum and aluminum alloys intended to give protection against corrosion and as a base for other coatings. Aluminum and aluminum alloys are chromate 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. The materials are classified according to its coating thickness: Class 1; Class 2; Class 3; and Class 4. Chromate conversion coatings are normally applied by dipping: the coating may also be applied by inundation, spraying, roller coating, or by wipe-on techniques.


SDO ASTM: ASTM International
Document Number B449
Publication Date April 1, 2004
Language en - English
Page Count 5
Revision Level 93(2004)
Supercedes
Committee B08.07
Publish Date Document Id Type View
Oct. 1, 2022 B0449-93R22 Reaffirmation
March 1, 2015 B0449-93R15 Reaffirmation
April 1, 2010 B0449-93R10E01 Reaffirmation
April 1, 2004 B0449-93R04 Reaffirmation
Nov. 10, 1998 B0449-93R98 Reaffirmation