Hydraulic self-driven anti-corrosion layer structure at joint of ring type steel pipe

By setting up a multi-layer anti-corrosion structure at the ring steel pipe interface, the pressure generated by the water flow is used to form a nano friction generator (TENG) structure to generate a protective current, solving the problems of corrosion and pipe scale generation at the pipe connections, and achieving efficient, safe and environmentally friendly anti-corrosion effects.

CN119642032AActive Publication Date: 2025-03-18ZHEJIANG UNIV OF TECH +1
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Patent Information

Application Number
CN202411600260.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-11
Publication Date
2025-03-18
Estimated Expiration
2044-11-11

AI Technical Summary

Technical Problem

Corrosion is prone to occur at the pipe connections, and the existing physical structure anti-corrosion design has poor protection performance, and is susceptible to mechanical damage and acid-base corrosion, making it difficult to effectively inhibit the generation and conversion of pipe scale.

Method used

A multi-layer anti-corrosion structure is set up at the ring steel pipe interface. The pressure generated by the water flow makes the cellulose aerogel film and the porous polydimethylsiloxane aerogel film extruded and contact each other, forming a nano-trigger generator (TENG) structure, generating alternating current and integrating it into DC power as the protective current of metal pipes, forming a current loop through the electrolyte environment to prevent pipeline corrosion.

Benefits of technology

Through hydraulically driven electrochemical reactions, effective corrosion prevention on the pipeline is achieved, inhibiting the generation and conversion of pipe scale, improving the durability and safety of the anti-corrosion effect, and reducing the preparation cost and environmental impact.

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Abstract

The hydraulic self-driven anti-corrosion layer structure is characterized in that an annular groove is formed in the pipe wall of the joint of the ring type steel pipe, and the anti-corrosion layer structure is arranged at the annular groove; comprising an anode metal layer arranged on the outer side of a steel pipe, a CNF film serving as a positive electrode of the nano friction generator and a PDMS film serving as a negative electrode of the nano friction generator, the CNF film and the PDMS film are sequentially arranged on the inner side of the steel pipe, a wire is arranged on the inner side of the CNF film and connected with a copper foil contact piece in the anode metal layer, and a wire is arranged on the inner side of the PDMS film and connected with a copper foil contact piece in the steel pipe. Double mechanisms of physical corrosion prevention and electrochemical corrosion prevention are fused, and a more comprehensive and efficient solution is provided for pipeline corrosion prevention. The service life of the steel structure pipeline is remarkably prolonged, and the water quality safety of drinking water is continuously guaranteed in the long-term service process of the pipeline. And meanwhile, the design further has a potential steel pipe repairing function, and extra guarantee is provided for long-term stable operation of the pipeline.
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