Explain the reason for the change of salt solution and concentration in the salt spray test chamber
The salt spray test chamber is suitable for the salt spray corrosion test of parts, electronic components, metal materials, and industrial products. It is one of the "three protection" (humid heat, salt spray, mold) test equipment for artificial climate environments. It is an indispensable test equipment for the research of machinery, national defense industry, light industry electronics, instrumentation and other industries for various environmental adaptability and reliability.
In the process of using the salt association test chamber, users often have changes in the concentration of the salt solution. To help the majority of users solve this problem, our company made the following analysis:
The most important factor that affects the change of the pH value of the salt solution is the different soluble substances in the atmosphere. The different soluble substances mixed in the brine are slightly acidic and some alkaline, so that the pH value of the salt solution changes. The dissolution of soluble substances will lower the pH of the salt solution, and the overflow of substances will increase the pH of the salt solution. Under the same environmental conditions, there will be more dissolved substances than spilled substances, so the pH value of the salt solution will generally decrease slightly during the test. Explain the reason for the change of salt solution and concentration in the salt spray test chamber
Atmospheric pressure also affects the pH value of the salt solution. When spraying with compressed air, due to the increase in air pressure, the amount of dissolved carbon dioxide and other acidic substances in the air increases, and the pH value of the salt solution decreases. The salt spray test chamber will continually spit out fine and fine particle salt spray while working, which will increase the contact area between the salt solution and the atmosphere, which will increase the amount of overflow of the soluble substance, and thus will increase the pH value of the salt solution.
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