Corrosion-resistant and alkali-resistant treatment method for pipe piece connecting piece of metro

A technology for connecting parts and segments, which is applied in the fields of multi-metal infiltration and alkali-resistant treatment, can solve the problems of high energy consumption, corrosion and poor wear resistance of composite heat treatment technology, reduce the frequency of maintenance and replacement, improve economical effect
CN102409286BInactive Publication Date: 2014-03-12SHANGHAI DACROMET SURFACE TREATMENT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI DACROMET SURFACE TREATMENT
Publication Date
2014-03-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a corrosion-resistant and alkali-resistant treatment method for a pipe piece connecting piece of a metro. The method is characterized by comprising the following steps of: performing multi-metal co-diffusion treatment on the pipe piece connecting piece to endow the pipe piece connecting piece with corrosion resistance and electrical conductivity; and performing different alkali-resistant treatment on special parts which may contact alkaline water after the pipe piece connecting piece is assembled, wherein the special parts comprise polished rod parts and middle threads of bolts in the pipe piece connecting piece, five thread parts and end faces at the two ends of each bolt, and exposed parts after nuts and gaskets are assembled. By the corrosion-resistant and alkali-resistant treatment method for the pipe piece connecting piece of the metro, the technical requirements of corrosion resistance, alkali resistance, electrical conductivity and the like of the pipe piece connecting piece of the metro are met, the maintenance and replacement frequency of components and parts in the running of the metro is greatly decreased at the same time, and the running economy of the metro is improved.
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Description

technical field

[0001] The invention relates to a corrosion-resistant and alkali-resistant method for segment connectors used in subways, and more precisely relates to a method for combining multi-element metal co-infiltration and alkali-resistant treatment for segment connectors used in subways. Background technique

[0002] Urban rail transit is one of the important means to solve the traffic problems in our country's cities, especially large and extra-large cities. In recent years, the number of tunnel projects using the deep-buried shield method in rail transit projects has also increased, and higher requirements have been put forward for the anti-corrosion technology of subway segment connectors.

[0003] Segment connectors of subway tunnels must meet the durability requirements of the 100-year design service life of subway tunnels. If the segment connectors of the subway tunnel are corroded, since the tunnel segment connectors cannot be replaced, the bearing capacity ...

Claims

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