Causes and Prevention of Corrosion of Rail Bolts
What are the main sources of corrosion on track bolts?
Rainwater, moisture, salt spray, de-icing agents, acid rain, industrial dust, stray currents, etc., can all cause oxidation and electrochemical corrosion on the bolt surface.
What are the hazards of bolt corrosion?
Thread jamming, difficulty in disassembly and assembly, inaccurate torque, reduced strength, and easy breakage affect the stability of fasteners and joints, increasing maintenance difficulty and safety risks.
What are some common bolt corrosion protection methods?
Hot-dip galvanizing, Dacromet coating, zinc-aluminum coating, stainless steel materials, thread corrosion grease, composite anti-corrosion coatings, etc.
Why is corrosion protection more important for high-strength bolts?
High-strength bolts have high strength and are more sensitive to stress corrosion. Corrosion easily leads to hydrogen embrittlement and fatigue fracture, posing a greater safety impact.
How to delay bolt corrosion on-site?
Select corrosion-resistant bolts, apply rust-preventive grease, keep bolts clean and dry, promptly repair damaged coatings, and regularly replace bolts in severely corroded sections.