This standard specifies a systematic test method for evaluating the galvanic corrosion behavior of two different marine metallic materials in marine environments. It explicitly requires the use of a galvanic corrosion meter (also known as a galvanic current meter or zero-resistance ammeter) to accurately measure the galvanic current between dissimilar metal pairs after electrical connection, in order to assess the corrosion tendency of the materials. The tests are conducted in simulated marine environments containing artificial seawater, natural seawater, or a 3.5% sodium chloride solution. The method details the entire process, from specimen preparation and operational procedures to result evaluation. Although primarily aimed at materials used in ships, this method can also serve as a reference for evaluating the corrosion resistance of metallic materials in other fields, such as marine engineering.