This standard specifies the specific method for corrosion testing of stainless steel materials in a 5% sulfuric acid solution, applicable for evaluating the corrosion resistance of different types of stainless steel in sulfuric acid environments. The method used is the immersion weight loss technique, with the main testing process involving continuous immersion of the specimen in the sulfuric acid solution at a specific temperature (e.g., 50°C) for a certain duration (e.g., 24 hours or longer). The corrosion resistance is ultimately assessed by analyzing the mass loss per unit area of the specimen. The standard provides detailed descriptions of the test solution, specimen preparation, test operation procedures, as well as the calculation and evaluation methods for the results.