Stainless steel water pipe The application of the stainless steel pipe is more and more extensive. Some customers report that the stainless steel pipe is rusted Stainless steel pipe What are the reasons for rust.

When the film of stainless steel welded pipe is damaged, oxygen atoms in the air or liquid will continuously penetrate or iron atoms in the metal will continuously separate, forming loose iron oxide, and the metal surface will be continuously corroded.

1、 What are the forms that cause the destruction of the film

1. Stainless steel welded pipe Drainage pipeline There are dust containing other metal elements or attachments of dissimilar metal particles on the surface. In the humid air, the condensate between the attachments and stainless steel forms a micro battery, which causes electrochemical reaction and damages the protective film, which is called electrochemical corrosion.

2. Organic juice adhered to the surface of stainless steel pipe forms organic acid in the presence of water and oxygen, and the organic acid will corrode the metal surface for a long time.

3. The adhesion of stainless steel pipe surface contains acid, alkali and salt substances, causing local corrosion.

4. When encountering condensate in polluted air, sulfuric acid, nitric acid and acetic acid will form liquid spots, causing chemical corrosion.

2、 The above conditions are all caused by the damage of the protective film on the surface of stainless steel welded pipe and corrosion. Therefore, in order to ensure that stainless steel welded pipes are not corroded, Stainless steel water pipe manufacturer Suggestion:

1. The surface of stainless steel pipe shall be cleaned and scrubbed frequently to remove attachments and deal with external factors that cause modification.

2. In some areas near the sea, 316 stainless steel pipes should be used, and 316 stainless steel pipes can resist seawater corrosion.

3. The chemical composition of some stainless steel welded pipes on the market cannot meet the corresponding national standards, and cannot meet the material requirements. Therefore, it will also cause rust, which requires users to carefully select products from reputable manufacturers. In this case, the rusted parts can be cleaned and kept dry and clean, and the passivation layer will continue to form after a period of time.