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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 chromate treatments of zinc and cadmium surfaces.

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

1.3 Other methods, such as exposure to a humidity environment, can be used, but are generally of too long a duration to be of practical value. “Steam Tests” using pressure cookers have also been used for testing chromate films on hot-dip galvanized surfaces.

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

1.5 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 B201-80(2014)

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    Standard Practice for Testing Chromate Coatings on Zinc and Cadmium Surfaces

    • Most Recent
  2. ASTM B201-80(2009)e1


    Standard Practice for Testing Chromate Coatings on Zinc and Cadmium Surfaces

    • Historical Version
  3. ASTM B201-80(2004)


    Standard Practice for Testing Chromate Coatings on Zinc and Cadmium Surfaces

    • Historical Version
  4. ASTM B201-80(2000)


    Standard Practice for Testing Chromate Coatings on Zinc and Cadmium Surfaces

    • Historical Version