A titanium-clad steel corrosion-resistant grounding material

Abstract

A corrosion-resistant titanium-coated steel grounding material is a double-layer structure composite material comprising an inner corrosion-resistant low-carbon steel layer and an outer coating titanium layer. Alloying components in the inner corrosion-resistant low-carbon steel layer include, in weight percent, one or more of 0.01-0.25% of C, 0.01-0.60% of Si, 0.10-1.60% of Mn, less than or equal to 0.010% of S, 0.010-0.025% of P, 0.05-2.0% of Cu, 0.01-0.20% of Sn and 0.01-0.20% of Sb. The section of the corrosion-resistant grounding material is circular, the thickness of the outer coating titanium layer is 0.1-1mm, and the processing technology includes heat treatment after titanium tape coating or extrusion forming. The grounding material is corrosion-resistant under the condition of a grounding grid, and is fine in electrical conductivity, convenient in construction and capable of resisting corrosion caused by highly corrosive soil media.

Description

technical field [0001] The invention relates to the technical field of grounding materials for substations or power transmission towers and low-carbon steel materials, and relates to a grounding material for improving the corrosion resistance of a grounding grid, in particular to a titanium-clad steel corrosion-resistant grounding material. Background technique [0002] Grounding is to connect some parts of electrical equipment and a certain point of the power system to the earth, provide a leakage channel for fault current and lightning current, stabilize the potential, provide a zero potential reference point and reduce the insulation level to ensure that the power system and electrical equipment The safe operation of the system, while ensuring the personal safety of power system operators and other personnel. The grounding function is realized through grounding material or grounding system. The grounding of the power system can be divided into two types: one is the relat...

AI Technical Summary

Problems solved by technology

There are some disadvantages in using galvanized steel: First, in order to prevent accidents caused by corrosion, it is a common method to increase the cross-sectional area of ​​galvanized steel, but there is a serious waste of materials, which increases the difficulty of construction, and cannot be prevented in areas with strong corrosion Fractures caused by localized corrosion; Second, in view of the poor corrosion resistance of galvanized steel, the relevant specifications require that the grounding grid needs to be regularly excavated and inspected, or regularly rebuilt and rebuilt, which not only affects the normal operation of the power substation, but also greatly increases Project investment, and many grounding grids are built under buildings, resulting in great difficulties in ground grid excavation and transformation

Some problems have been reflected in practical applications: for example, copper materials are expensive and difficult to be widely used, and are only used in some key projects or special projects; due to the high cost, frequent theft accidents may cause larger grounding accidents; Pollution with groundwater; and poor corrosion resistance in acidic environments

The shortcomings are: (1) The outer stainless steel can deal with the general corrosion problem in most soil environments, but local corrosion cannot be completely avoided

The problem is that the corrosion resistance of the copper core is much greater than the zinc layer covering the outer periphery of the copper core, even without the protection of the zinc layer, it will not affect the service life of the copper core

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