A processing method for obtaining high corrosion resistance and ultra-thick galvanized layer for power fittings

A technology of electric power fittings and processing methods, applied in metal material coating process, hot dipping process, coating and other directions, can solve the problems of inability to match the life of electric power facilities for more than 30 years, and the zinc layer cannot be made thick, so as to eliminate adhesion Low strength, good adhesion, good thickness uniformity

Active Publication Date: 2022-07-01
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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  • A processing method for obtaining high corrosion resistance and ultra-thick galvanized layer for power fittings
  • A processing method for obtaining high corrosion resistance and ultra-thick galvanized layer for power fittings
  • A processing method for obtaining high corrosion resistance and ultra-thick galvanized layer for power fittings

Examples

Experimental program
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Embodiment 1

[0034] S1: Preliminary plating: place the pretreated workpiece in the primary galvanizing tank for initial plating for 3 minutes, and then take it out to dry, wherein the zinc solution in the primary galvanizing tank adopts 0# zinc, and the initial plating temperature is 395°C;

[0035] S2: Secondary galvanizing: The workpiece after primary galvanizing is placed in a rectangular secondary galvanizing pool for 4 minutes, then taken out to solidify and dry. 0.01% Si and 0.1% graphene oxide particles, the graphene oxide particles are porous graphene oxide nanoparticles, the secondary galvanizing temperature is 480 °C in the front section and 455 °C in the rear section, and the workpiece is sine wave up and down in the secondary galvanizing pool Ups and downs move forward, and at the same time, the ultrasonic wave is continuously vibrated, and the ultrasonic frequency is 20kHz.

[0036] The steps of Examples 2 to 4 are the same as those of Example 1, except that the process parame...

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Abstract

The invention discloses a processing method for obtaining a high-corrosion-resistant and extra-thick galvanized layer for a power fitting, belonging to the technical field of hot-dip galvanizing, and comprising the following steps: S1: primary plating: placing the pretreated workpiece in a primary galvanizing bath Medium and primary plating for 1 to 5 minutes, then take out and dry, wherein the initial plating temperature is 350 to 450 ° C; S2: Secondary galvanizing: place the workpiece after primary plating in a rectangular secondary galvanizing pool at a temperature of 0.5 to 5 m / m min speed movement, the workpiece moving in the forward direction is a sine wave up and down motion trajectory, the surface of the workpiece zinc layer and the zinc liquid are in flow contact to increase the density and arrangement orientation, the zinc liquid is uniformly mixed by ultrasonic vibration, and the secondary galvanizing liquid When the temperature is controlled at 420°C to 520°C, the thickness of the zinc layer of the present invention can reach 170 to 255 μm, and the zinc layer has good adhesion, low brittleness and high corrosion resistance.

Description

technical field [0001] The invention relates to a processing method for obtaining a high-corrosion-resistant and ultra-thick galvanized layer for electric power fittings, belonging 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. They are used to transmit and withstand mechanical loads such as tension, bending, shearing and torsion, as well as high-voltage electrical loads. It is commonly used in iron and steel ferrous metal parts such as casting or forging. A large number of power fittings have been operated in various harsh environments for a long time, including high salt spray, high temperature and high humidity, metallurgical plants, fertilizer plants, pharmaceutical plants, mines and other seriously polluted environments. Under long-term operating conditions, the surface of power fittings often corrodes, and the corrosion failure of po...

Claims

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Application Information

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Patent Type & Authority Patents(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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