The alternating salt spray test method in the salt spray test box is suitable for determining the adaptability of the gas components and equipment when stored in a salty wet environment. The salt spray test chamber can be used as a corrosion test, can also detect the deterioration of non-metallic materials caused by salt spray, and can also be used to assess the performance changes of gas components and equipment in a salt spray environment.
The corrosion of metal materials by salt is electrochemical, while the damage to non-metallic materials is caused by the complex chemical reaction between the salt and the material. The corrosion damage rate depends largely on the temperature of the oxygen-containing salt solution on the surface of the test sample and the test sample, as well as the temperature and humidity of the environment.
During the early test, the spraying time is sufficient to allow the test sample to be fully wetted, and the spraying of the salt spray test chamber must be repeated after storing the test sample for a period of time under humid and hot conditions.
The alternating salt spray test is accelerated compared to most conditions of use. But it is impossible to have the same acceleration coefficient for different types of samples. In fact, it is also composed of two conditions of salt spray and damp heat storage. The test sample was not energized during the spraying process; it was also normally not energized during wet and hot storage. For details, please refer to the international standard IEC 68-2-52 (1984) "Test Kb: Alternating Salt Spray Test Method".
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