About salt spray test

The salt spray test is an environmental test that uses the artificial simulated salt spray environmental conditions created by the salt spray test equipment to evaluate the corrosion resistance of products or metal materials. It is divided into two categories, one is the natural environmental exposure test, and the other is the artificial accelerated simulated salt spray environment test. The artificial simulated salt spray environment test uses a test equipment with a certain volume space--the salt spray test chamber, and uses artificial methods in its volume space to cause the salt spray environment to evaluate the salt spray corrosion resistance quality of the product. . Compared with the natural environment, the salt concentration of the chloride in the salt spray environment can be several times or several times that of the salt spray content of the general natural environment, so that the corrosion rate is greatly improved, and the product is subjected to a salt spray test to obtain a result. The time is also greatly shortened. If a product sample is tested in a natural exposure environment, it may take 1 year to corrode, and in a simulated simulated salt spray environment, as long as 24 hours, similar results can be obtained.

The purpose of the salt spray test is to assess the salt spray corrosion quality of products or metal materials. The salt spray test results are judged on the quality of the product. Whether the judgment result is correct and reasonable is the correct measurement of the product or metal salt spray resistance. The key to corrosion quality. The methods for determining the salt spray test results include: rating determination method, weighing determination method, corrosion occurrence determination method, and corrosion data statistical analysis method. The rating judgment method divides the percentage of the ratio of the corrosion area to the total area into several grades according to a certain method, and uses one level as the basis for the qualification judgment. It is suitable for the evaluation of the flat sample; the weighing determination method is adopted before and after the corrosion test. The weight of the sample is weighed, and the weight of the corrosion loss is calculated to judge the corrosion quality of the sample. It is especially suitable for assessing the corrosion resistance of a certain metal; the determination method of corrosion occurrence is a qualitative judgment. The method determines the sample after the salt spray corrosion test, and the sample is judged by the corrosion phenomenon. Most of the general product standards use this method; the statistical analysis method of the corrosion data provides a confidence in designing the corrosion test, analyzing the corrosion data, and determining the corrosion data. Degree method, which is mainly used to analyze and count the corrosion situation, rather than the quality judgment of a specific product.

Salt spray test is an important means to assess the resistance of products or materials to salt spray corrosion. The scientific and rational test results are of great importance. There are many factors affecting the stability and consistency of the salt spray test results. To improve the effectiveness of the salt spray test results, the test technique is the key. Therefore, the tester not only needs to have solid professional knowledge and professional skills, but also needs rich practical experience and comprehensive understanding of the product. From the multidisciplinary fields of chemical and environmental engineering, materials, structure and process, he understands the salt spray test, which is scientific and reasonable. The results of the test are better to provide effective information for product selection, structural design, process selection, product transportation storage and use, and to improve the resistance of products or materials to salt spray corrosion.

As we all know, the marine environment is generally damp and seawater has a certain salt content. Therefore, marine hardware products have high requirements for their anti-corrosion and anti-oxidation properties. We simulated the salt spray test of our products by simulating the characteristics of the marine environment. The data shows that our fasteners can pass the salt spray test for more than 140 hours, and the rust and oxidation resistance is excellent.