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Integration corrosion-proof method for copper seawater pipe line

A seawater pipe and anti-corrosion technology, which is applied in the field of integrated anti-corrosion of copper seawater pipelines, can solve problems such as seawater pipeline corrosion, achieve the effects of preventing galvanic corrosion, improving seawater erosion resistance, and prolonging service life

Active Publication Date: 2009-08-12
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings existing in the corrosion prevention technology of copper materials in the existing marine environment, and seek a method that adopts a variety of anti-corrosion measures to solve the corrosion problem of seawater pipelines. Weak parts with severe corrosion, such as intubation, near the variable diameter, behind the water inlet flange, before and after the pump valve, etc., are the object of cathodic protection

Method used

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Examples

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Embodiment Construction

[0017] When the present invention is implemented, it adopts sacrificial anode protection, Ni-P alloy coating, and electrical insulation technology to comprehensively prevent the corrosion of copper alloy seawater pipelines. Fe-Cr or Fe-Mn-Cr or Fe-Mn-Cr-Al alloy, wherein the total weight percentage content of alloying elements is 1-10%, the rest is iron (Fe), and the percentage content of iron is 90-99%; The outer casing of the composite structure and the pipeline are made of copper material; the inner wall of the pipeline or the inner wall of the pipe fittings such as elbows and tees is plated with Ni-P coating on the copper substrate by electroless plating, and the average thickness of the coating is 50 μm. The weight percentage content of P in the coating is 10-13%; use electrical insulation on the contact parts of dissimilar metals such as pipe fittings and equipment to prevent galvanic corrosion, and use insulating materials such as polytetrafluoroethylene or aramid rubber...

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Abstract

An integrated corrosion-proof method for Cu sea water pipelines includes: taking Fe alloy anodic sacrifice protection, chemically electroplating Ni-P alloy layer, and dielectric technology by flange section style or stage sacrifice anode composition style. The Fe alloy sacrifice anodes are of Fe-Mn and Fe-Cr; or Fe-Mn-Cr and Fe-Mn-Cr-Al with alloyed elements of (1-10%) and balanced with Fe. The casings of composite structure are of copper and inner walls and bends of the pipelines electroplated with Ni-P layer to improve flushing-resisting performance and to last their working life longer.

Description

Technical field: [0001] The invention relates to an integrated anti-corrosion method for copper seawater pipelines, especially to protect severely corroded parts such as flange ends, elbows and tees in pipelines, which can not only play the role of cathodic protection, but also be able to withstand seawater Erosion corrosion effectively prolongs the service life of seawater pipelines, and belongs to a method for comprehensively protecting copper alloy seawater pipelines from corrosion. Background technique: [0002] The corrosion problem of seawater pipelines in ships has always troubled designers and users, and people are constantly exploring its solutions. There are various forms of selection and surface treatment of seawater pipelines. For example, the early steel seawater pipelines used methods such as galvanizing and plastic coating to improve the corrosion resistance of the pipelines; as the design flow rate of ship seawater systems increased, copper-nickel alloys Pip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F15/00C23F13/02C23C18/32
Inventor 王洪仁李相波孙明先许立坤姚萍
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP