Qualified Sedimentation Amount of Salt Spray Test Chamber
The correct test method, the correct operation method, and the qualified sedimentation amount are the correct way to open the salt spray test chamber. The correct operation method is actually as long as you master the following points, you can have a qualified settlement.
1. Preparation of neutral salt spray test reagents; first ensure that the reagents used must be chemically pure or above, and then at a temperature of 25℃±2℃, the conductivity is not higher than 20us/cm of distilled water or deionized water. Sodium chloride dissolved in ionized water, the reagent is prepared to a concentration of 50g/L plus or minus 5g/L. In addition, it should be noted that the copper content in the sodium chloride used should be less than 0.001%, the nickel content should be less than 0.001%, and the sodium iodide content should not exceed 0.1%. If the temperature of the water used is 25°C plus or minus 2°C, but the pH value of the prepared solution exceeds the range of 6.0 to 7.0, it should be checked for salt or unwanted impurities in the water used. The prepared solution can then be filtered before use, in order to prevent the solid matter in the solution from clogging the nozzle.
2. The samples are placed; the test is to allow multiple samples to be placed at a time, and they may not be on the same level; however, it must be ensured that they must not touch the box or each other, and the distance between the samples should be different. Influence the salt spray to fall freely on the sample to be tested, and secondly, the droplets on the test bracket and the test sample cannot fall on other samples. The angle at which the sample is placed is also very important. In the salt spray test chamber, the surface of the test sample is 15° to 25° to the vertical direction, and 20° is the best.
3. According to the operation process of the salt spray test chamber, set the temperature of the studio and the saturation barrel, and wait for the test results patiently for the time you want to test. In addition, it is mentioned in the standard that if the test time exceeds 96h, the test sample can be allowed to shift during the period.