ABSTRACT
This chapter provides information about accelerated tests that age coatings, why the salt spray test should not be used, what to look for after an aging test is completed, accelerated testing of coatings for immersion service, advanced methods for studying coatings and degradation, and how the amount of acceleration in a test is calculated, and how the test is correlated to field data. The chapter discusses the two all-purpose tests: the ASTM D5894 test and the ISO 20340 test. Automotive coatings have much lower dry-film thickness than do many protective coatings; this is important for mass transport phenomena. The three tests described in the chapter are those believed to be adaptable to heavy maintenance coatings: VDA 621-415, the Volvo Indoor Corrosion Test (VICT), and the Society of Automotive Engineers (SAE) J2334. The chapter also discusses test methods for immersed coatings, which includes an ambient temperature test, a flexible temperature test, and a high-temperature test.
