This SAE Recommended Practice covers a laboratory procedure for testing and evaluating the resistance of surface coating to chipping by gravel impact. The test is designed to reproduce the effect of gravel or other media striking exposed paint or coated surfaces of an automobile and has been correlated with actual field results. The specific intent of the test is to evaluate organic surface coatings or systems on flat test panels; however@ It may be possible to extend this type of testing to finished parts or other types of materials such as anodized aluminum or plated plastics if the results are interpreted with respect to the limitations and intent implied by the original testing procedures and rating system.
SAE J400-1985 history
2022SAE J400-2022 Test for Chip Resistance of Surface Coatings
2012SAE J400-2012 Test for Chip Resistance of Surface Coatings
2002SAE J400-2002 Test for Chip Resistance of Surface Coatings
2001SAE J400-2001 Test for Chip Resistance of Surface Coatings
1985SAE J400-1985 Test for Chip Resistance of Surface Coatings
1980SAE J400-1980 Test for Chip Resistance of Surface Coatings
1968SAE J400-1968 Test for Chip Resistance of Surface Coatings