【国外标准】 Standard Practice for Salt-Accelerated Outdoor Cosmetic Corrosion Testing of Organic Coatings on Automotive Sheet Steel

3.1 Tests of the type described in this practice are used to evaluate the corrosion resistance of organic coatings on metal products exposed to highly salty environments, such as areas subjected to deicing salts or coastal areas. Exposure conditions are complex and changeable. Important factors include climate, time of year, presence of pollution, and so forth. Generally it is difficult, if not impossible, to define or measure precisely all the factors that influence degradation. Repeated exposure testing during different seasons and over a period of at least two years is required to obtain results representative of any given location.1.1 This practice is designed to assist procedures to be followed when conducting outdoor exposures to evaluate cosmetic corrosion that might occur in steel panels covered with an organic coating that has been damaged. The outdoor exposures described are based on Practices G7 and G50  and include periodic wetting of the test specimens with a salt solution.1.2 The methods of preparing test specimens and the particular exposure requirements of materials are beyond the scope of this practice.1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.