For friends engaged in coastal engineering operations, engineering machinery parts are often corroded by high salt fog, resulting in frequent failures and increased costs. Below is a streamlined guide to rust prevention for engineering machinery parts in coastal high-salt-fog areas.
I. Preliminary Selection: Prevent Corrosion from the Source
Prioritize high-strength, salt-fog-resistant materials such as 316 stainless steel, weathering steel, and alloy structural steel. Avoid carbon steel and cast iron parts without anti-rust treatment; check for industrial-grade salt spray test certification (neutral salt spray test ≥72 hours) when purchasing.
II. Daily Maintenance: Key Protection
1. Regular Cleaning
Clean precision parts (hydraulic joints, sensors) with high-pressure fresh water daily after operation; clean large stressed parts (pins, track shoes) weekly. Avoid chlorine-containing cleaners and ensure thorough drying after cleaning.
2. Strengthened Protection
Treat small stressed parts (bolts, pins) with hot-dip galvanizing or Dacromet; apply engineering-specific anti-rust grease regularly. Seal precision electronic parts with waterproof sealant; spray salt-fog-resistant anti-rust paint on large parts and touch up twice a year.
3. Environment Avoidance
Avoid strong sea winds and splashing seawater during operation; park equipment in a well-ventilated, dry area away from the coast. Elevate long-term parked equipment to avoid contact with damp ground.
III. Emergency Treatment: Stop Loss in Time
Light rust: Polish, clean, dry and apply anti-rust grease. Moderate rust: Use engineering-specific rust remover, then strengthen protection. Severe rust (penetration, deformation): Replace parts immediately with salt-fog-resistant ones.
IV. Pitfalls to Avoid
- ❌ Do not apply anti-rust oil without cleaning; ❌ Do not use ordinary anti-rust products; ❌ Do not ignore gaps, interfaces and stress surfaces.
Choosing the right parts and doing a good job in daily maintenance can effectively extend the service life of parts and reduce construction costs.
