Engineering case

All raw materials are imported from Japan SUS314, heat-resistant 1250 ℃, strong anti-oxidation and anti-carburizing.

What are the influencing factors of the passive film on the surface of stainless steel mesh belt?

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Stainless SteelMesh beltWhat are the influencing factors of surface passivation film?

1. Chloride ion. Chloride ion is very harmful to stainless steel mesh belt. In the passivation process, the content of chloride ions in the passivation solution should be strictly controlled. The chemical materials used for passivation have quantitative requirements for chloride ions. Passivation cleaning water also has strict water quality requirements for chloride ions to ensure that passivation products do not adhere to chloride ions and avoid future problems.
2. External cleaning. For stainless steel mesh belts, the lower the surface roughness, the more lubricated the surface, the more difficult it is for foreign matter to adhere, and the lower the probability of corrosion of each part. Therefore, the stainless steel mesh belt finishing appearance should be selected as much as possible. In addition, the surface cleanliness of stainless steel is also very important. After passivation, the final cleaning should be done carefully. Since the remaining acid solution promotes the cathodic reaction, the film is broken, thereby activating the stainless steel and reducing the corrosion resistance.
3. Use environmentally friendly media. The passive film of stainless steel mesh belt belongs to the metastable structure controlled by thermodynamics, and its protection efficiency is related to the environmental medium. It should be cleaned in time to remove long-term harmful substances on the surface. Especially in environments containing chloride ions, long-term condensation of chloride ions on surfaces and in water should be avoided. For example, stainless steel is used for food utensils. Clean after each contact with food to avoid damage to the passivation film due to the influence of chloride ions. For example, for containers and equipment used for dairy products, chloride ions in dairy products can damage the passivation film. For example, if dairy products are stored for too long, Heilongjiang ophthalmologists will cause corrosion and perforation to the capacity and equipment, so they should be cleaned in time to restore the passivation film.
4. Connotation elements of stainless steel mesh belt. The content of martensite and chromium-nickel in stainless steel mesh belt has a great influence on the passivation function of stainless steel. If the nickel content is low, the passivation function is low. The passivation function of martensitic stainless steel is not as good as austenitic stainless steel.

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