In the artificial three defenses, the salt spray test is the most devastating to the material. Salt spray corrosion is a common and most destructive atmospheric corrosion. The corrosion of the surface of the metal material by the salt spray is caused by the electrochemical reaction of the chloride layer which penetrates the metal surface and the protective layer and the internal metal. Compared with the natural environment, the salt spray chamber salt concentration of the salt spray in the salt spray environment can be several times or several times higher than the salt spray content of the general natural environment, so that the corrosion rate is greatly improved, and the salt spray test is carried out on the product. The time to get results is also greatly shortened, so the salt spray test is very important in environmental testing.

Regarding the placement of samples, according to the author's many years of laboratory work experience, the relevant national standards, military standards and international ISO standards are summarized as follows:

1. The salt spray test chamber test sample should be at an angle of 15° to 30° from the vertical direction. Under normal circumstances, it should not be laid flat. The test range of the salt spray test sample is mentioned in the salt spray test standard requirements and should be as close as possible to an angle of 20°. For irregular test products, the above requirements should be as close as possible.

2. The salt spray test chamber test samples can be placed on different horizontal surfaces in the test box, but they must not touch the box, and they should not touch each other. The distance between the test samples shall not affect the free fall of the salt spray on the test surface, and the droplets of salt spray accumulated on the test sample shall not drip onto other test samples.

3. The salt spray cannot be sprayed directly onto the test surface of the sample. The test sample is placed in the salt spray test chamber with the test surface facing up, so that the salt spray generated during the spray of the salt spray test chamber is free to settle and deposit on the test surface of the sample, and the water droplets cannot be placed on the front side to form a water droplet.

4, salt spray test chamber sample holder is made of glass, plastic and other materials resistant to salt spray, acid and alkali corrosion, small samples such as silk, silk caps, etc., if you need to hang on the bracket, the material of the suspension sample Metal materials cannot be used. Non-metallic materials such as cotton fibers, rayon or other insulating materials are generally used.

Facing the future, Linpin Group will continue to work hard, constantly innovate, adhere to the scientific development concept, and strive to build a harmonious enterprise, and make unremitting efforts for Lin Frequency to become the leader in the environmental testing equipment industry.

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