Where can I do salt spray test? National standards and precautions for salt spray test

Date：2021-07-27 16:52:00 Views：2311

Salt spray corrosion is a common and destructive atmospheric corrosion. Where can we do salt spray corrosion test? When it comes to salt spray testing, many customers have made it difficult to choose a third-party testing organization. In fact, it is very convenient to directly find the Chuangxin testing center. Our company has dozens of professional engineers and industry elite teams, and has three standardized laboratories with an area of more than 1000 square meters, which can undertake the testing and verification of electronic components and the identification of IC authenticity, Product design, material selection, failure analysis, function inspection, factory incoming material inspection, tape braiding and other test items.

Salt spray corrosion is a common and destructive atmospheric corrosion. The corrosion of salt spray on the surface of metal materials is caused by the electrochemical reaction between the contained chloride ions penetrating the oxide layer and protective layer on the metal surface and the internal metal. At the same time, chloride ions contain a certain hydration energy, which is easy to be squeezed out by the pores and cracks adsorbed on the metal surface and replace the oxygen in the oxide layer, turn the insoluble oxide into soluble chloride, and turn the passive surface into an active surface. The purpose of salt spray test is to assess the salt spray corrosion resistance quality of products or metal materials. The judgment of salt spray test results is the judgment of product quality. Whether its judgment results are correct and reasonable is the key to correctly measure the salt spray corrosion resistance quality of products or metals.

The national standard for salt spray test is:GB / T 2423.17, iec60068-2-11, iso4628-3, ASTM B117, jis-z2371, jis-g3141, GJB 150.11a-2009, mil-std-810f, mil-std-883e, etc.

Precautions for salt spray test:

1. Rust and lubricating grease must be completely removed from the sample substrate for test. Whether the substrate has been sandblasted, polished or phosphated, be careful not to be exposed to humid air, so as to prevent the formation of water film on the surface of the substrate, resulting in re rusting or reducing the adhesion between the coating and the substrate.

2. The key of salt spray test is to prepare the concentration of electrolyte solution. The solutes of various components shall be strictly weighed in proportion to ensure the accuracy of pH value. Otherwise, it will directly affect the test results.

3. After preparing the coated samples and parts, it is necessary to seal the edges with paint and cover the exposed parts of the substrate. Otherwise, it will cause rust marks to hang and pollute the plate surface, which will bring difficulties to the rating work.

4. During regular inspection of plates and parts, the plate surface shall be kept in a wet state to minimize the exposure time of the plate surface to the air.

5. After the test, the panel surface shall be objectively evaluated immediately, including blistering, discoloration, rust and falling off. The inspection and evaluation of adhesion, scratch and unilateral corrosion distance can also be increased according to customer requirements.

Conclusion: when selecting an organization, you can see the qualification and service of the organization. Chuangxin testing always adheres to the purpose of "professionalism, authority, efficiency and innovation". It has invested heavily in purchasing international advanced testing equipment. The testing is in strict accordance with international testing standards and methods. It has obtained CNAs certification and international mutual recognition qualification. Its customer base covers many countries and regions at home and abroad. It is of excellent domestic quality Well known professional IC testing organization.