The air source for a salt spray test chamber typically relies on a compressed air system. To ensure optimal performance, the compressed air must be clean and free from contaminants such as oil, dust, and other particulates. It is important to properly humidify and warm the air before it enters the sprayer to meet the required working conditions. The air pressure should be carefully controlled to produce a dense and uniform salt fog, which is essential for accurate testing.
To prevent clogging of the nozzle due to salt buildup, the relative humidity of the air at the point of ejection should be maintained between 95% and 98%. One effective way to achieve this is by passing the compressed air through a hot water tower that generates very fine bubbles. The water temperature in the tower should be around 35°C, though it can be slightly higher depending on the air volume and the insulation level of the test chamber.
It’s also important to monitor the surrounding temperature of the salt spray test chamber. Excessive heat could lead to too much moisture entering the chamber, potentially affecting the test results or making it difficult to maintain the correct operating temperature. Therefore, the environment around the chamber should be controlled to avoid these issues. Proper maintenance of the air supply system is crucial for consistent and reliable test outcomes.
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