A composite coating for a piston rod in a marine environment and a method of making the same
By preparing a FeCoNiCrMo high-entropy alloy-based composite coating on the surface of a piston rod in a marine environment, and utilizing laser cladding technology and slow cooling treatment, a dense FCC structure and a carbide-reinforced system are formed, which solves the problem of insufficient corrosion resistance of coatings in marine environments and achieves long-term corrosion resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGDONG YUEKE NEW MATERIALS TECH CO LTD
- Filing Date
- 2026-06-03
- Publication Date
- 2026-07-17
AI Technical Summary
Existing marine piston rod coatings lack sufficient corrosion resistance in high salt spray and high chloride ion environments. Traditional coatings are easily penetrated by chloride ions, leading to corrosion and peeling, and cannot meet the requirements for long-term use.
A composite powder consisting of FeCoNiCrMo high-entropy alloy powder, WC powder, Ti powder, graphite powder, and CeO2 powder is used to form a composite coating on the piston rod surface through a coaxial powder feeding laser cladding process. Combined with substrate preheating and slow cooling treatment, a dense FCC structure high-entropy solid solution and TiC and WC carbide reinforcement system are formed to block chloride ion corrosion.
It significantly improves the long-term corrosion resistance of piston rod coatings in marine environments. Through the synergistic effect of the passivation film of high-entropy alloy, dense coating structure and carbide reinforcement phase, it blocks chloride ion penetration, avoids coating peeling, and achieves long-term structural stability in high salt spray and high chloride ion environments.
Smart Images
Figure CN122400554A_ABST