Composite vapor phase corrosion inhibitor used in extreme marine atmospheric environment and preparation method thereof

By using a composite vapor-phase corrosion inhibitor consisting of benzotriazole, cysteine, sodium phytate, and cyclohexylamine carbonate in extreme marine atmospheric environments, a stable protective film is formed, solving the protection problem of copper and copper alloy components in extreme environments and achieving efficient, long-lasting, and environmentally friendly protection.

CN122446201APending Publication Date: 2026-07-24INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202610781844.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-02
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing technologies are insufficient to effectively protect copper and copper alloy components in extreme marine atmospheric environments, especially under conditions of high temperature, high humidity, high salinity and strong radiation. Existing coatings are prone to aging, electroplating is costly and unsuitable, and single and existing composite vapor phase corrosion inhibitors have low protection efficiency and poor environmental adaptability, failing to meet the long-term protection needs of marine engineering equipment.

Method used

A composite vapor-phase corrosion inhibitor is formed by mixing benzotriazole, cysteine, sodium phytate and cyclohexylamine carbonate in a specific ratio. It is prepared by gradient stirring to form a dense protective film, which synergistically blocks the erosion of corrosive media, adapts to extreme environments, and is non-toxic and environmentally friendly.

Benefits of technology

It significantly reduces the corrosion rate of copper sheets by more than 95%, the protective film is stable in extreme environments, has strong adaptability, long protection period, is environmentally friendly and non-toxic, and is easy and low in cost to prepare, making it suitable for copper metal components in the field of marine engineering.

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Abstract

The invention belongs to the technical field of metal corrosion protection, and particularly relates to a composite vapor phase corrosion inhibitor used in an extreme ocean atmospheric environment, a preparation method of the composite vapor phase corrosion inhibitor and application of the composite vapor phase corrosion inhibitor to metal part protection in the ocean engineering fields of offshore wind power, ships, ocean platforms and the like. The composite vapor phase corrosion inhibitor is prepared from the following components in parts by mass: 1 to 2 parts of benzotriazole, 3 to 5 parts of cysteine, 0.5 to 1.5 parts of sodium phytate and 6 to 8 parts of cyclohexylamine carbonate. Through the synergistic effect of all the components, a stable and compact protective film is formed on the copper surface, coupling erosion of high temperature, high humidity, high salinity and intense radiation in the extreme ocean atmospheric environment can be effectively blocked, and experiments show that the corrosion rate of a copper sheet can be reduced by 95% or above in the simulated extreme ocean atmospheric corrosive liquid. The corrosion inhibitor has the advantages of being high in extreme environment adaptability, excellent and lasting in corrosion inhibition effect, environmentally friendly, non-toxic, easy and convenient to prepare, low in cost and the like, is suitable for long-acting protection of copper metal components in the ocean engineering field of offshore wind power and the like, and has wide application prospects.
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