The pH of the Salt Spray Test Chamber is different from the pH of the corrosion resistance, and the matching experimental structure function is different. Generally speaking, the pH is adjusted by adding acidic and alkaline chemicals or alkaline chemicals to the corrosion resistance (i.e., Nacl aqueous solution).
Salt Spray Test Chamber
1. Weak acid salt spray test (NSS test) corrosion resistance configuration:)
The pH is adjusted according to the amount of sulfuric acid and NaOH added. Because the pH of neutral salt spray is manipulated in the middle of 6.3-7, measuring pH can use acidity meter, also can use hardware mechanical pH pregnancy test paper (accurate measurement precision within 0.5pH)
2. Acetic acid salt spray test (AASS experiment) corrosion resistance configuration.
According to the amount of glacial acetic acid and NaOH added to adjust the ph pH. Because the acetic acid corrosion resistance pH manipulation in the middle of 3.2-3.2, therefore, measuring pH can be used acidity meter, but also hardware mechanical pH pregnancy test paper (accurate measurement precision within 0.5pH)
3, copper to accelerate the acetic acid salt spray test (CASS test) corrosion resistance configuration.
In the preparation of good salt solution, add copper chloride (CuCl2, 2H2O), and manipulate the concentration value at 0.26g / L ± 0.03g / L. Nacl aqueous solution pH value adjustment method and the same as Article 2.
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