How to match the salt water solution used in the salt spray test - Database & Sql Blog Articles

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How to match the salt water solution used in the salt spray test

The salt spray test chamber solution is divided into three methods according to the salt spray test standard:

A. Neutral salt spray test salt solution preparation.

Analytically pure sodium chloride was dissolved in purified water at a concentration of (50 ± 10) g/L. The pH of the test solution was determined to be 6.5 to 7.5 at 25 ° C using a pH test paper. When it is out of range, it can be adjusted by adding analytical hydrochloric acid or sodium hydroxide solution. The prepared solution needs to be filtered before use.

B. Acid salt spray test - preparation of salt spray solution

First, the analytically pure sodium chloride is dissolved in purified water at a concentration of (50 ± 10) g / L, and then the pH of the solution is adjusted with acetic acid to make it in the range of 3.1 to 3.3, and the pH is collected using the salt. The fog sample was measured. The pH should be measured at 25 ° C. The prepared solution should be filtered before use.

C. Copper salt accelerated acetic acid test - preparation of salt spray solution

In the first step, the analytically pure sodium chloride is dissolved in purified water at a concentration of (50 ± 10) g / L.

In the second step, reagent grade copper chloride is added to the prepared brine according to a ratio of 0.26 g per liter of solution, and the solution is thoroughly mixed.

In the third step, the pH of the solution was adjusted with acetic acid to a value in the range of 3.1 to 3.2, which was measured using the collected salt spray sample. The pH should be measured at 25 ° C. The prepared solution should be filtered before use.