The purpose of the salt spray test is to evaluate the salt spray corrosion resistance of the product or metal material, and the salt spray test result judgment is the evaluation of the product quality. Is the evaluation standard correct and reasonable? The key to corrosion quality. After the salt spray test chamber has completed the salt spray test, the evaluation criteria for the test results should usually be proposed by the material or product standard being tested. The general test only needs to consider the following aspects:
1. Appearance after the test;
2. Appearance after removing surface corrosion products;
3. The distribution and number of corrosion defects such as pitting corrosion, cracks, air bubbles, etc. can be evaluated according to the methods specified in Appendix C (eqv ISO 1462: 1973) of GB 6461, GB 12335, GB / T 9798-1997;
4. The time when corrosion begins to appear;
5. Weight change;
6. Microscope observation;
7. Changes in mechanical properties.
After completing the test, the salt spray test chamber can only achieve the above seven aspects to reflect the integrity and perfection of the test. Only in this way is a complete and standard test.
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