A method for manufacturing a corrosion and high temperature resistant titanium and titanium alloy welded component

Through scientific surface pretreatment, composite gold plating, and interface stabilization treatment, combined with selective masking and in-situ anodizing, the performance degradation problem of titanium alloy welded parts under high temperature and corrosive environments has been solved, achieving a comprehensive improvement in corrosion resistance and high temperature resistance.

CN122169180APending Publication Date: 2026-06-09DONGGUAN YICHUANG SURFACE TREATMENT TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGGUAN YICHUANG SURFACE TREATMENT TECH CO LTD
Filing Date
2026-04-02
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing titanium alloy welded components suffer from performance degradation and corrosion in high-temperature environments. Current processes cannot meet the combined requirements of corrosion resistance and high-temperature resistance. Furthermore, the shielding methods lack precision, the electrolyte system lacks reinforcing phase components, and the process parameters are unreasonable, resulting in insufficient welding performance and long-term service stability.

Method used

A pretreatment using a PTFE and ceramic composite coating clamping fixture is employed to form a nickel underlayer. Then, nano-ceramic powder is deposited using a composite gold-plating electrolyte. Combined with interface stabilization heat treatment and selective masking, in-situ anodizing is performed to form an Au-nano-ceramic composite coating, achieving functional zoning.

Benefits of technology

It significantly improves the adhesion between the coating and the substrate, avoids separation and cracking, enhances the strength and corrosion resistance of welded joints, ensures the structural integrity of components under high-temperature extreme conditions, and extends service life.

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Abstract

This invention provides a method for manufacturing corrosion-resistant and high-temperature-resistant welded titanium and titanium alloy components, relating to the field of titanium and titanium alloy material processing technology. The method includes: sequentially performing ultrasonic cleaning, chemical degreasing, pickling, and activation for surface pretreatment; followed by pre-plating with nickel, deposition of a composite gold plating layer of nano-ceramic powder modified with a silane coupling agent, and then achieving metallurgical bonding between the plating layer and the substrate through an argon-hydrogen mixed atmosphere interface stabilization heat treatment; selective masking using a photolithography mask and UV-cured resist; and in-situ anodizing using a composite electrolyte containing sulfuric acid, phosphoric acid, sodium molybdate, and sodium tungstate via a step-boost method. This invention effectively solves the problems of poor plating adhesion, easy softening failure at high temperatures, insufficient corrosion resistance, and poor welding performance in traditional titanium alloy welded components through the synergistic effect of multiple processes including surface pretreatment, pre-plating with nickel, composite gold plating, interface stabilization heat treatment, and partitioned in-situ anodizing.
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