Standard

SAE J2635

Published

Note: This standard has a new edition: SAE J2635

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Abstract

This test procedure defines a laboratory procedure for generating and evaluating filiform corrosion on painted aluminum wheels and painted aluminum wheel trim. While this test was developed specifically for the testing of painted aluminum wheels and wheel trim, it may be applicable to other components. The application owner will need to assess if this test generates filiform similar to that found in the relevant usage to ensure it will provide accurate data for the application. Purpose To establish a uniform test method for the wheel and wheel trim industry when assessing the resistance of components to filiform corrosion. An objective is to reduce test procedure proliferation and thereby reduce costs for establishing and maintaining unique test facilities, test methods, measurement methods, laboratory accreditations, and operator training. The net effect is to reduce cost while improving the quality of the test data by adopting uniform and standardized test methods. The procedure does not establish performance standards for the components. Performance standards are to be established by the users of the test and/or their clients. The method and format for documenting proficiency is defined. Overview Filiform corrosion is generated by exposing a coated substrate to a warm, humid environment. This filiform test procedure utilizes the SAE J2634 scribing method to ensure consistent exposure of the sample substrate to the corrosion products. The test part is inoculated with corrosion products by using ASTM B368-97 (2003)e1 followed by an immersion in de-ionized (DI) water to remove excess corrosion products and then placed in a temperature and humidity controlled test cabinet to initiate the formation of filiform corrosion. Posttest evaluations of length of filiform filament growth, density of filaments, and area of filiform growth can be assessed to evaluate the corrosion resistance of the component.

Document information

  • Standard from SAE_AC
  • Published:
  • Version: 0
  • Document type: IS