A method for coating a molybdenum disulfide protective layer on the surface of a titanium aviation fastener

By polishing and pulsed laser beam processing the surface of titanium aviation fasteners, coating them with a molybdenum disulfide composite coating and applying a hydrophobic protective layer, the wear and corrosion problems of titanium fasteners in high-load and high-temperature environments are solved, achieving significant improvements in wear resistance and corrosion resistance, making them suitable for the aerospace field.

CN119909916BActive Publication Date: 2025-09-12XIAN ZHITONG AVIATION TECH CO LTD
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Patent Information

Application Number
CN202510396955.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-04-01
Publication Date
2025-09-12
Estimated Expiration
2045-04-01

AI Technical Summary

Technical Problem

Titanium aviation fasteners are prone to wear under high load and high temperature conditions, and are susceptible to corrosion in certain environments. Existing technologies make it difficult to effectively improve their wear resistance and corrosion resistance.

Method used

By polishing the surface of the fastener and treating it with a pulsed laser beam to form a honeycomb microporous array, a composite coating containing molybdenum disulfide is coated on it, and a hydrophobic protective layer is applied thereon. Combined with polyimide resin, graphene oxide and other ingredients, a coating structure with a resin matrix, lubrication enhancement, interface bonding and corrosion protection is formed.

Benefits of technology

It significantly improves the wear resistance and corrosion resistance of titanium aviation fasteners, extends their service life, and meets the durability and reliability requirements of the aerospace field.

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Abstract

The present application relates to the field of metal protection technology and specifically discloses a method for coating a titanium aviation fastener with a molybdenum disulfide protective layer, comprising the following steps: S1. Fastener surface treatment: polishing the fastener surface to obtain a fastener with a surface roughness of 0.05-0.07 microns, cleaning it with an organic solvent, and then using a pulsed laser beam to form a honeycomb micropore array on the material surface with a pore size of 5-10 μm and a depth of 20-50 μm, thereby obtaining a pre-treated fastener; S2. Molybdenum disulfide coating: applying the molybdenum disulfide coating to the pre-treated fastener surface, storing it at room temperature for 12 hours, and then coating it with a hydrophobic protective layer; S3. Room temperature curing: curing the fastener coated with the hydrophobic protective layer at room temperature for 4-6 hours to obtain. The method of the present application can be used for surface protection of titanium aviation fasteners and has the advantages of good wear resistance and corrosion resistance.
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