This standard mainly specifies the accelerated test method for tracking the comprehensive exposure of solar salt (acid) fog to the natural environment, including the test principle, test equipment and instruments, specimens, test conditions, test procedures, test records, data processing, result statement and test report. It is applicable to the natural environment accelerated test of materials, process parts, small and medium-sized parts and small machines used in the marine atmospheric environment (coastal, reef and ship surface) and industrial acid rain atmospheric environment. The standard also includes terms and definitions, such as surface wetness, black pancl temperature and comparative samples.