How to protect the crevice corrosion of mesh belt?
Mesh beltHow to protect the crevice corrosion?
1. Reasonable design to prevent cracking. For example: welding is better than riveting; butt welding is better than lap welding; to ensure the quality of welding, to prevent the emergence of welding holes; screw joint structure, can use low sulfur rubber gasket, fine filler, joint surface can be protected by coating. In addition, the design should prevent water accumulation; protection, should be diligent in finishing, remove dirt, etc.
2. When the design cannot prevent gaps, cathodic protection can be used. For example, in seawater, sacrificial zinc or magnesium electrodes are used. However, attention should be paid to hydrogen embrittlement when using this method.
3. Since it is difficult for the corrosion inhibitor to enter the gap, the joint surface can be coated with a paint with corrosion inhibitor. For example, for steel, a paint containing PbCrO4 is used; for aluminum, a paint with zncro4 is used; for metal plates, it can be separated with a wrapping paper impregnated with a vapor phase corrosion inhibitor.
4. Appropriate materials should be used. For some important parts, materials with strong crevice corrosion resistance can be used, such as high chromium and high molybdenum stainless steel.
The above contents are providedMesh beltFactory finishing release, reprint please indicate!