Corrosion and self-lubrication resistant composite coating and method of manufacture, mechanical component

By introducing a periodic nanolayer structure into the DLC coating, the failure problem of traditional DLC coatings under coupled corrosion, wear, and impact conditions was solved, and the coating's high adhesion, toughness, and corrosion resistance were improved.

CN121852879BActive Publication Date: 2026-07-03ARISON SURFACE TECH SUZHOU
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ARISON SURFACE TECH SUZHOU
Filing Date
2026-03-18
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Traditional DLC coatings are prone to failure under harsh conditions of corrosion, wear, and impact coupling, leading to loss of coating function or secondary damage and reducing the service life of components.

Method used

A periodic nanolayered structure from the inside out is adopted, including a metal bonding layer, an alloy toughening layer and a metal compound reinforcement layer, forming an n-layer (metal/alloy/compound) stack, which is bonded to the surface DLC. The coating's adhesion, toughness and corrosion resistance are enhanced by alternating deposition of magnetron sputtering and reactive magnetron sputtering.

Benefits of technology

It effectively solves the problem of early failure of traditional DLC coatings under coupled corrosion, impact and wear conditions, improves the coating's adhesion, toughness and corrosion resistance, while maintaining the excellent surface properties of DLC.

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Abstract

This invention belongs to the field of composite coating technology, specifically providing a composite coating with both corrosion resistance and self-lubricating properties, its preparation method, and a mechanical component. By using a periodic nanolayered structure composed of a metal bonding layer, an alloy toughening layer, and a metal compound reinforcing layer as an intermediate support bonded to the surface DLC layer, it effectively solves the problem of early failure of traditional DLC coatings under harsh conditions of coupled corrosion, impact, and wear due to poor toughness, weak interfacial bonding, and insufficient corrosion protection. It can improve the coating's adhesion, toughness, and corrosion resistance while maintaining the excellent surface properties of DLC.
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