ASTM B368 - 09(2014)

    Standard Test Method for Copper-Accelerated Acetic Acid-Salt Spray (Fog) Testing (CASS Test)

    Active Standard ASTM B368 | Developed by Subcommittee: B08.10

    Book of Standards Volume: 02.05


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    Significance and Use

    3.1 The CASS test is widely employed and is useful for specification acceptance, simulated service evaluation, manufacturing control, and research and development. It was developed specifically for use with decorative, electrodeposited nickel/chromium and copper/nickel/chromium coatings. Use of the test has improved the quality of electroplated parts and led to the development of new and superior electroplating processes.

    1. Scope

    1.1 This test method prescribes the conditions required in copper-accelerated acetic acid-salt spray (CASS) testing for specification purposes. The standard does not specify the type of test specimen or exposure periods to be used for a specific product, nor the interpretation to be given to the results.

    1.2 This test method is applicable to evaluating the corrosive performance of decorative copper/nickel/chromium or nickel/chromium coatings on steel, zinc alloys, aluminum alloys, and plastics designed for severe service. It is also applicable to the testing of anodized aluminum. The suitability of this test and correlation of results with service experience should be determined before it is specified for coating systems or materials other than those mentioned in this paragraph.

    Note 1The following standards are not requirements. They are referenced for information only: Practices B537 and E50, Specifications B456 and B604, and Test Method B602.

    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. For more specific safety precautionary information see 8.1.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    B117 Practice for Operating Salt Spray (Fog) Apparatus

    B162 Specification for Nickel Plate, Sheet, and Strip

    B456 Specification for Electrodeposited Coatings of Copper Plus Nickel Plus Chromium and Nickel Plus Chromium

    B537 Practice for Rating of Electroplated Panels Subjected to Atmospheric Exposure

    B602 Test Method for Attribute Sampling of Metallic and Inorganic Coatings

    B604 Specification for Decorative Electroplated Coatings of Copper Plus Nickel Plus Chromium on Plastics

    D1193 Specification for Reagent Water

    E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials

    E70 Test Method for pH of Aqueous Solutions With the Glass Electrode


    ICS Code

    ICS Number Code 77.060 (Corrosion of metals)

    UNSPSC Code

    UNSPSC Code 11101704(Steel); 11101711(Non ferrous alloy)


    Referencing This Standard

    DOI: 10.1520/B0368-09R14

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM B368-09(2014), Standard Test Method for Copper-Accelerated Acetic Acid-Salt Spray (Fog) Testing (CASS Test), ASTM International, West Conshohocken, PA, 2014, www.astm.org

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