1. Selection of test conditions: according to different materials and uses, choose the appropriate test conditions, including temperature, humidity, sulfur dioxide concentration, etc.

2. Preparation of the sample: The sample should be representative and reflect the actual use. In the process of sample preparation, the factors affecting the test result such as scratches and oil should be avoided.

3. Monitoring during the test: During the test, the sample needs to be inspected regularly to observe its corrosion and record relevant data.

4. Result analysis: According to the test data, the corrosion resistance of the material is analyzed to provide a basis for its selection and use in production and use.