As a Railway Fastening System Exporter, let me share with you.
Corrosion phenomena and mechanisms related to the stainless steel body of railway vehicles are discussed.
Physical reasons damage the coating of high corrosion-resistant fasteners, resulting in corrosion of fasteners.
Corrosion treatment and protection of railway vehicle fasteners:
Fastener rust removal and antirust process methods can effectively prevent the rust phenomenon of fasteners.
1. Process flow
① Surface cleaning one ② Fastener rust removal one ③ Fastener rust prevention one ④ Anticorrosive wax drying
2. Surface cleaning
Before construction, the area around the anti-rust treatment part should be protected to ensure that the anti-corrosion wax, cleaning agent, and anti-rust agent do not pollute rubber parts, plastic parts, electrical parts and other parts. Before anti-rust treatment, the surface dust, rust, oil and other impurities must be thoroughly removed. After cleaning, repaint the fasteners with unclear anti-loosening marks. Technical requirements: Confirm that the surface of the part to be coated with protective wax or spray cleaning agent is clean and free of impurities, and the protection is tight.
3. Derusting of fasteners
After spraying the rust remover and cleaning agent, wait for 5-10 minutes according to the degree of rust, so that the rust remover is fully immersed, and use a soft cloth to wipe the rusted parts. Do not use rough materials such as sandpaper to wipe the parts to avoid damage during the rust removal process. The protective layer on the surface of the component causes secondary damage. This step can be repeated for severely rusted parts until the rust is cleaned up. After the rust removal is completed, repaint the fasteners with unclear anti-loosening marks.
4. Anti-rust of fasteners
The viscosity of anticorrosive wax changes with temperature. The lower the temperature, the higher the viscosity, and the higher the temperature, the lower the viscosity. For individual storage rooms whose temperature is low and the viscosity of the anti-corrosion wax is too high and cannot be used, the anti-corrosion wax can be placed in the workshop for a period of time before use, but be careful not to get close to high-heat objects.
The specific locations of the fasteners for applying anti-corrosion wax: bolt heads, nuts, washers, split pins, positioning pins, etc. The anti-corrosion wax is required to cover the upper part of the fastener, and the thickness of the anti-corrosion wax coating is not required. Apply anti-corrosion wax to special parts, such as applying anti-corrosion wax to one end of the chute before putting the carbon steel fasteners in the chute into the chute.
5. Anticorrosive wax drying
After applying the anticorrosive wax, let it dry for at least 24 hours at room temperature. Do not touch or scratch the surface of the construction parts during the drying process to prevent damage to the protective film of the coating. If the anti-rust coating is damaged, apply it according to the principle. After the completion of the construction of each process, self-check the rust removal and anti-rust parts to check whether there is any missing parts, and if there are missing parts, find repairs in time.
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