What is the cause of the damage of the stainless steel valve membrane ?
"Although in theory stainless steel does not rust, once it rusts, it is not stainless steel. It may be that there is a problem with the steel." Such views are considered to be one-sided or lack of understanding of stainless steel. Stainless steel has the ability to resist atmospheric oxidation, that is, non-rust, and it also has the ability to resist corrosion in media containing acid, alkali, and salt, that is, corrosion resistance.
However, the corrosion resistance of stainless steel varies with the chemical composition of the steel itself, environmental conditions and the type of medium used.
What is the cause of the damage of the stainless steel valve membrane
1. Electrochemical corrosion. The surface of the stainless steel valve accumulates dust containing other metal elements or attachments of foreign metal particles. In moist air, the condensation between the attachments and the stainless steel connects the two into a micro battery, which initiates an electrochemical reaction. The protective film is damaged.
2. The organic juice adheres to the surface of the stainless steel valve. In the presence of water and oxygen, it forms an organic acid, which will corrode the metal surface for a long time.
3. The surface of stainless steel valve contains acid, alkali, and salt substances, which can cause local corrosion.
4. In the polluted air (such as the atmosphere containing a lot of sulfide, carbon oxide, and nitrogen oxide), it will form sulfuric acid, nitric acid, and acetic acid liquid spots when encountering condensed water, causing chemical corrosion.
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