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ASTM B921-08(2023)
Standard Specification for Non-hexavalent Chromium Conversion Coatings on Aluminum and Aluminum Alloys
Translate name
STANDARD published on 1.11.2023
The information about the standard:
Designation standards: ASTM B921-08(2023)
Publication date standards: 1.11.2023
SKU: NS-1157736
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: American technical standard
Category: Technical standards ASTM
The category - similar standards:
Annotation of standard text ASTM B921-08(2023) :
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.
Keywords:
conversion coating, non-hexavalent chromium conversion coating, non-rinsed, rinsed,, ICS Number Code 77.120.10 (Aluminium and aluminium alloys)
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