A grounding grid alloy material resistant to acidic soil corrosion and wear resistance

Abstract

The invention discloses a ground grid alloy material withresisting to acid soil corrosion and wearing. The ground grid alloy material comprises the following ingredients in percentage by weight: 0.1 to 0.25 percent of C, 0.06 to 0.08 percent of P, 0.012 to 0.015 percent of S, 1.2 to 1.8 percent of Si, 0.1 to 0.18 percent of Mn, 0.000001 to 0.00006 percent of Ag, 0.03 to 0.09 percent of W, 0.6 to 0.8 percent of Sn, 0.2 to 0.5 percent of V and the balance of Fe. Compared with the prior art, the ground grid alloy material resisting to acid soil corrosion and wearing has the advantages that under the condition of not adding copper, by adding a trace amount of silver with good electrical conductivity, the ground grid alloy material has lower cost than a pure copper material or a material added with a certain percent of copper; the ground grid alloy material has excellent wear resistance, has better electrical conductivity and higher acid resistance and corrosion resistance, and cannot cause pollution to soil;the alloy has higher corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant and corrosion-resistant metal materials for power grids, and in particular relates to a grounding grid alloy material resistant to acid soil corrosion and wear. Background technique [0002] In the integrated grounding system, metal grounding electrodes such as pure copper rods or copper-clad steel are usually used. Although the use of metal grounding electrodes can reduce the grounding resistance of the integrated grounding system, due to the problem of metal corrosion, the typical value of the corrosion rate of copper in the soil is 0.19mm / year, and the typical value of the corrosion rate of aluminum in the soil is 0.55 mm / year, the typical value of lead corrosion rate in soil is 0.42mm / year, and the typical value of steel corrosion rate in soil is 0.66mm / year, which will affect the life of the grounding electrode. The above metal corrosion rate data is uniform corrosion. If pitting corr...

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

Aluminum corrosion causes the grounding lead to become thinner, and the grounding resistance increases, causing accidents when subjected to lightning or short circuit, and cannot guarantee the safe operation of the power grid

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