How to make the aqueous solution of a large salt spray test chamber

Making aqueous solution: sodium chloride solution concentration value g/l 50 40--60 calibrated once a day; pH value is 6.
5 6.
5-7.
2 pH value in the test after the aqueous solution is collected; Air compression working pressure (kgf/cm2), 1.
00±0.
01 continuous and uninterrupted; The amount of sprayer ml/80cm2/h, 1.
0-2.
0 should be collected for at least 16 hours to find its average; Pressure tank temperature(°C), 47±1 ; Salt barrel temperature(°C), 35±1 ; Laboratory temperature (°C), 35±1 Test at least twice a day with at least 7 hours apart; Laboratory air humidity, about 85% Other ambient humidity requests, determined by the buyer-seller agreement from the moment of testing the start of the sprayer to the end of the agreement
.
Secondly, the production and manufacture of the experimental solution, melting the test grade sodium oxide in pure water (or the total melting solid amount is less than 200 ppm), prepared into a test solution with a concentration value of 5.
1%, the experimental solution is in the 35 °C sprayer, the pH value of the collection solution should be 6.
5~7.
3 Note that the experimental solution should not contain suspended solids
before the sprayer.
Sodium oxide should not contain copper and nickel and other defects, and the water content of solid N iodide should be less than 0.
1%.

Because the defective substance may contain erosion inhibitors, the total water content of the defective substance must be less than 0.
3%; The proportion of the experimental solution measured between 33~35 °C should be 1.
0258~1.
0402, and the proportion when measured at 25 °C should be 1.
0292~1.
0443
.
The concentration value of the experimental solution can also be calibrated
using silver nitrate solution titration or other methods.
The experimental solution shall adjust the pH value with the dilute aqueous solution of the test acid or caustic soda, and measure it with a pH meter or other firm method, because the water in which the experimental solution is manufactured contains CO2, and the solubility of CO2 in the water is modified with the temperature and endangers the pH value of the aqueous solution, so the pH must be carefully manipulated; Production and manufacture of test solution at room temperature, sprayer at 35 °C, because the increase of temperature will cause part of the CO2 to escape from the aqueous solution and increase the PH value
.
Therefore, when manufacturing the experimental solution at room temperature, the pH value should be adjusted within 6.
5 to make the pH value of the collection solution in the middle
of 6.
5~7.
2.
Before the pH value is adjusted, the experimental solution is first boiled and then cooled to 35 °C, or kept at 35 °C for 48 hours, so that the adjusted pH value will not be easy to change
greatly when the 35 °C sprayer is adjusted.
First, the water is heated to about 35 °C to remove the melted CO2, and then the experimental solution is demodulated and the pH value is adjusted; In order to avoid blockage of the nozzle of the sprayer, the experimental solution should be carefully or carefully tilted into the salt bucket, or placed at the front end of the sprayer moisture absorption tube
.