1. Chloride ions. Chloride ion on the stainless steel transport net belt serious harm. In the passivation process, the chloride content in passivation solution should be strictly controlled. The passivation chemical materials have requirements for chloride ions. Preparation of passivation liquid water and cleaning water also have strict water quality requirements for chloride ions, so as not to passivation products do not adhere to chloride ions.
2. Surface cleanliness. For stainless steel conveyor mesh belt, the lower the surface roughness, the smoother the surface, the more difficult the foreign body attached, the lower the probability of local corrosion. Therefore, stainless steel mesh belt should be used as far as possible to finish the surface. In addition, the surface cleanliness of stainless steel is also very important, after passivation cleaning should be carefully carried out.
3. Use ambient media. The passivating film of stainless steel conveyor net belt is a thermodynamically prevented metastable structural port and its protection efficiency is related to the environmental medium. In use, it should be cleaned regularly to remove harmful substances attached to the surface for a long time. In the environment with chloride ions, so as not to chloride ions long-term emulsion surface and in the water concentration mouth such as stainless steel for food industry utensils, each time after contact with food, should be washed, so as not to chloride ions, damage passivation film. For example, containers and equipment for dairy products, dairy products containing chloride ions have a destructive effect on the passivation film, such as long-term dairy products, will lead to capacity and equipment corrosion perforation, so regular cleaning, so that the passivation film recovery.
4 stainless steel transmission net belt internal factors. The content of martensite and chromium-nickel in stainless steel mesh belt has great influence on the passivation performance of stainless steel. Low nickel content, low passivation performance. The passivation film performance of martensitic stainless steel is lower than that of austenitic stainless steel.