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Full Description

1.1 This practice covers a procedure for evaluating the protective value of chemical and electrochemical conversion coatings produced by non-chromate (chromate being defined as a compound that has chromium in the plus six oxidation state, and as such, chromium compounds in other oxidation states, such as plus three, shall not be excluded) treatments of zinc and cadmium surfaces.

1.2 The protective value of a non-chromate coating is usually determined by salt-spray test and by determining whether or not the coating possesses adequate abrasion resistance when applied for that purpose.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 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 limitations prior to use.

 

Document History

  1. ASTM B940-05(2014)

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    Standard Practice for Testing Non-Chromate Coatings on Zinc and Cadmium Surfaces

    • Most Recent
  2. ASTM B940-05(2009)e1


    Standard Practice for Testing Non-Chromate Coatings on Zinc and Cadmium Surfaces

    • Historical Version
  3. ASTM B940-05


    Standard Practice for Testing Non-Chromate Coatings on Zinc and Cadmium Surfaces

    • Historical Version