The alternating salt spray test is applicable to components or equipment that are intended to withstand a salty atmosphere, and the degree of tolerance depends on the severity of the choice. Salt can reduce the performance of metal parts and or non-metal parts. The mechanism of metal material salt corrosion is electrochemical corrosion and the degradation of non-metal materials is caused by the complex chemical reaction between salt and material. The rate of corrosion is highly dependent on the temperature of the sample and the ambient temperature and humidity of the sample of the oxygenate solution supplied to the surface of the test sample.
The harshness of the alternating salt spray test:
Severe rating (1) four spray cycles, each for 2 hours, each group has a 7-day wet heat storage cycle after the spray cycle;
Severe grade (2) three spray cycles, each 2 hours, after each spray cycle there is a wet heat storage cycle of 20-22 hours;
Severity rating (3) One test cycle contains four spray cycles, each for 2 hours, and each spray cycle has a 20-22 hour wet heat storage cycle. Thereafter, there is a standard atmosphere for testing (temperature 23 ± 2 ° C a relative humidity of 45% to 55%) for a three-day storage period;
Two test cycles as specified by the severity level (4) severity level (3)
Four test cycles as specified by the severity level (5) severity level (3)
Eight test cycles as specified by the severity level (6) severity level (3)
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