The standard "GB/T 41898-2022 Electrochemistry method for the determination of corrosion resistance and compactness of the coating layer on the inner wall of food metal containers" introduces the use of electrochemistry methods to test the corrosion resistance and compactness of the coating or film laminating layer on the inner wall of food metal containers. It is suitable for food containers coated with tin-plated or chrome-plated sheet steel (aluminum) and film laminating iron (aluminum) substrates, such as cans and beverage cans. The standard evaluates the corrosion resistance of coatings by accelerated electrochemistry corrosion testing, and measures the capacitance value of the surface double electron layer and the tangent value of the dielectric loss angle by applying a weak voltage to evaluate its compactness. Relevant analytical water specifications and coating tin plating standards are cited to ensure the accuracy and reliability of the test.