Background

An 110 kV overhead distribution network running through a chemical and manufacturing zone showed rapid degradation within 4 years. Acid fog, sulfur oxides, and industrial dust triggered galvanic corrosion between aluminum and steel components, leading to overheating at connections and increased line losses.

Solution

A medium‑corrosion‑protection anti‑corrosion grease with chemical resistance and good electrical compatibility was applied. The process included:

• Stranded‑gap filling to isolate dissimilar metals
• Grease coating at conductor–fitting interfaces
• Sealing against acidic moisture and particulate contamination
• Compliance with power‑grid material compatibility standards

Outcomes

• Galvanic corrosion suppressed by 85%
• Connection contact resistance stabilized
• Line loss reduced by approximately 6%
• Maintenance intervals extended from 1 year to 4 years
• Zero corrosion‑related failures over a 4‑year monitoring period

Conclusion

Anti‑corrosion grease provides reliable chemical and electrochemical protection for overhead conductors in heavy industrial environments, improving both safety and economy.