According to our years of sales experience and after-sales service experience, we summarized several problems related to the inaccuracy of several common data distributions in the salt spray test chamber, such as the ratio of brine and the test. Temperature, the amount of spray, the impact of water quality, etc. will lead to inaccurate test results, but don't worry, I will teach you how to solve it.

For the neutral salt spray test (NSS test) is the most widely used accelerated corrosion test method in the current application, its salt water ratio is 50g salt dissolved into 1L salt solution, the specific gravity of salt and water is about 1: 19, the proportion is 1 / 20, the pH value of the brine is between 6 and 7, all meet the requirements. Sometimes when the customer does not hold the salt water, it will cause the test results to deviate from the actual situation. Therefore, we generally need to use PH test paper to test the PH value.

The test temperature of the salt spray test chamber is controlled at about 35 ° C, the saturation temperature is about 47 ° C, and the temperature setting is not wrong. Of course, the accuracy and accuracy of the meter's temperature control is the most important.

The amount of salt spray settled is also of great importance. The amount of spray required by international standards is 1-2 ml of salt spray per square meter of 80 square centimeters per hour. If the amount of spray is too large or too small, then the height of the spray can be adjusted up and down to solve the problem.

Regardless of the test in any test chamber, the influence of water quality is also very important for this test. Therefore, the salt water of the salt spray test chamber generally requires the use of pure water or distilled water. Some customers use tap water directly, and there are many chemical components in the tap water. And impurities, will also have an impact on the test results, and will also block the nozzle, resulting in the failure to spray.