This standard provides a laboratory test procedure for evaluating the corrosion performance of a particular coating system, substrate, process or design. As a test method relevant to the actual environment, it can be used both to verify the performance of existing designs and for the development of new products. Miscellaneous corrosion mechanisms other than Appearance corrosion or general corrosion must be established during testing. This standard aims to provide reliable testing means to ensure the corrosion performance of materials in actual use.