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Processing method of obtaining highly wear-resistant ultra-thick zinc coating of electric power fitting

A technology of electric power fittings and processing methods, applied in metal material coating process, hot dip plating process, coating and other directions, can solve the problem that the zinc layer cannot be made thick and cannot match the life of power facilities for more than 30 years, and achieves adhesion Good, eliminate the effect of low adhesion strength and good thickness uniformity

Active Publication Date: 2020-12-15
中国南方电网有限责任公司超高压输电公司柳州局 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The galvanized layer of existing electric power fittings is generally around 85um. The zinc layer cannot be made thick, and the defects in galvanizing technology make the fittings corrode within 5 years in this harsh environment, which cannot match the design life of power facilities for more than 30 years.

Method used

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  • Processing method of obtaining highly wear-resistant ultra-thick zinc coating of electric power fitting
  • Processing method of obtaining highly wear-resistant ultra-thick zinc coating of electric power fitting
  • Processing method of obtaining highly wear-resistant ultra-thick zinc coating of electric power fitting

Examples

Experimental program
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Effect test

Embodiment 1

[0034] S1: Initial plating: place the pretreated workpiece in the initial galvanizing bath for 3 minutes, then take it out and dry it. Among them, the zinc solution in the initial galvanizing bath is 0# zinc, and the initial plating temperature is 395°C;

[0035] S2: Secondary galvanizing: place the workpiece after initial plating in a rectangular secondary galvanizing pool for 4 minutes, then take it out to solidify and dry, wherein the zinc solution in the secondary galvanizing pool includes 0.3% Bi, 0.13% Sb, 0.01% Si and 0.1% graphene oxide particles, graphene oxide particles are porous graphene oxide nanoparticles, the temperature of the secondary galvanizing is 480°C in the front section and 455°C in the back section, and the workpiece is sine wave up and down in the secondary galvanizing pool Ups and downs advance, while also carrying out continuous ultrasonic vibration, the ultrasonic frequency is 20kHz.

[0036] Embodiment 2~4 are identical with the step of embodiment...

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Abstract

The invention discloses a processing method of obtaining a highly wear-resistant ultra-thick zinc coating of an electric power fitting and belongs to the technical field of hot galvanizing. The methodcomprises the following steps of S1, initial plating: putting a pre-treated workpiece in an initial galvanizing pond to be initially plated for 1-5 min, and then taking out the workpiece and drying the same, wherein the initial plating temperature is 350-450 DEG C; and S2, secondary galvanizing: putting the initially plated workpiece in a rectangular secondary galvanizing pond to move at a speedof 0.5-5 m / min, wherein the workpiece moves in an up-down moving track of a sine wave in a forward direction, the surface of the zinc coating of the workpiece and a zinc liquid are in flowing contactto increase the compactness and the arranging orientation, the zinc liquid is mixed uniformly by ultrasonic vibration, and the control temperature of a secondary galvanized liquid is 420-520 DEG C. The thickness of the zinc coating can reach 170-255 [mu[m, and the zinc coating is good in adhesive force, low in brittleness and high in corrosion resistance.

Description

technical field [0001] The invention relates to a processing method for obtaining a high-corrosion-resistant super-thick galvanized layer for electric fittings, and belongs to the technical field of hot-dip galvanizing. Background technique [0002] Power fittings are important metal components that connect and combine various devices in the power system, and are used to transmit and withstand mechanical loads such as tension, bending, shearing and torsion, and high-voltage electrical loads. Common ferrous metal parts such as casting or forging, a large number of power fittings have been operating in various harsh environments for a long time, including high salt spray, high temperature and high humidity, metallurgical plants, chemical fertilizer plants, pharmaceutical factories, mines and other seriously polluted environments. Under long-term operating conditions, corrosion often occurs on the surface of power fittings. Corrosion failure of power fittings will cause disconn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C22C18/00
CPCC23C2/06C22C18/00
Inventor 韦扬志钟万才宋志强方苏谭宗会阳仁庆李茂峰周经中黄运兴袁锋陈秋石财发赵斌庞祖新韦成维李固坛韦黎彭金华
Owner 中国南方电网有限责任公司超高压输电公司柳州局
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