The water used to configure the test solution of the salt spray test chamber must be in accordance with the distilled water or deionized water specified in the standard. At a temperature of 23 Â± 2 â„ƒ, the conductivity of the water cannot exceed 2MS / M. The chlorine used to make the test solution Huana cannot call out additives with more than 0.3%, sodium iodide does not exceed 0.1%, and the total copper and nickel content does not exceed 0.001%. For sodium chloride, if other test methods are used, this requirement can be met if No, you need to filter the configured solution.
The most conventional test method of the salt spray test chamber is neutral salt spray test and acid salt spray test. Its test solution has certain differences:
Test solution for SS test: Under the condition of 23 Â± 2 â„ƒ, the pH value of the sodium chloride solution needs to be adjusted to 6.5-7.2. Both acid and alkali can be used to adjust the PH value of the solution. The PH value needs to be at 23 Â± 2 â„ƒ Under the condition of using glass electrode, it is determined by electrolysis. The concentration of the test solution is 50 Â± 5 per liter.
Test solution for ASS test: The pH of the sodium chloride solution needs to be formulated with an acetic acid solution to ensure compliance with the standard, and all the sprayed and collected solutions have a pH of 3.1 to 3.3, and the temperature is 23 Â± 2 â„ƒ. There are 1 to 3 grams of acetic acid in the liter. The pH value needs to be measured with a glass electrode under the conditions of 23 Â± 2 â„ƒ, using a glass electrode. The concentration of the test solution is 50 Â± 5 per liter. This article is from: Shanghai Linpin Instrument Co., Ltd. Please indicate the source when reprinting, thank you!
Changxing Mingwang Rubber & Plastic Technologies Co.,Ltd. , https://www.cxmingwang.com