The crevice corrosion protection of stainless steel mesh belt

The corrosion protection of the mesh belt itself refers to the protection of the stainless steel mesh belt. The following is mainly about the protection of stainless steel mesh belts. The same is true for mesh belts. We hope that customers will pay attention. In order to extend the service life of the mesh belt, the working conditions of the mesh belt need to be considered.






Crevice corrosion is mainly caused by the electrochemical inhomogeneity of the medium and caused by the existence of cracks. Therefore, in order to protect the crack corrosion, the following contents can be mainly referred to:

1. Reasonable design to avoid gaps. For example: welding is better than riveting; butt welding is better than lap welding; welding must ensure quality and avoid welding holes; low-sulfur rubber gaskets, dense gaskets and gasket surfaces can be protected with coatings. In addition, water accumulation should be avoided during the design process. Be diligent in cleaning and removing dust during maintenance.

2. When the design cannot avoid the gap, cloudy protection can be used. For example, sacrificial zinc or magnesium is used in seawater. But when using this method, pay attention to the problem of hydrogen fragility.

3. Since it is difficult for corrosion inhibitors to enter the gap, corrosion inhibitor coatings can be applied on the joint surface. For example, for steel, please use PbCrO4 aluminum paint, please use paint containing ZnCrO4; for sheet metal parts, you can use impregnated with vapor phase corrosion Separate the inhibitor wrapper.

4. Switch to suitable materials. For some important parts, you can switch to materials with strong resistance to corrosion cracking, such as high chromium and high molybdenum stainless steel