Saline water pH value control method and operation method for neutral salt spray test

The invention provides a saline water pH value control method for a neutral salt spray test and an operation method. The control method comprises the following steps: carrying out first equilibrium treatment on to-be-used saline water, so that the pH value of the to-be-used saline water is within a first pH preset range; performing a neutral salt spray test on the to-be-used salt water within the first pH preset range in salt spray test equipment to obtain settled salt water; and carrying out second equilibrium treatment on the settled salt water, so that the pH value of the settled salt water is within a second pH preset range. According to the method, the pH value strict testing step is established, the pH value of the to-be-used saline water is controlled within a very small range, the pH value corresponding relation between the to-be-used saline water and the settled saline water can be established, and then the pH value of the settled saline water can be controlled within the required range through the c