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Method for preventing C4F7N corrosion by metal surface treatment of electrical insulation equipment

A metal surface treatment and electrical insulation technology, which is applied in the direction of metal material coating process, solid diffusion coating, coating, etc., can solve the problems of performance degradation of metal parts of insulation equipment, drop of flashover voltage along the surface, and reduction of insulation performance. To achieve the effect of avoiding normal operation, preventing the generation of toxic gas and preventing corrosion

Active Publication Date: 2020-09-25
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] C 4 f 7 N is easy to corrode metal materials in electrical equipment during practical application, which will not only degrade the performance of metal parts in insulating equipment, cause flashover voltage drop along the surface, gas leakage and other problems, but also cause C 4 f 7 N decomposes, reducing insulation performance

Method used

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  • Method for preventing C4F7N corrosion by metal surface treatment of electrical insulation equipment
  • Method for preventing C4F7N corrosion by metal surface treatment of electrical insulation equipment
  • Method for preventing C4F7N corrosion by metal surface treatment of electrical insulation equipment

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Embodiment 1

[0035] Surface treatment of a metal part (made of red copper) of electrical insulation equipment to prevent C 4 f 7 The method for N gas corrosion, the specific steps are as follows:

[0036] 1) Clean the copper parts: soak the copper parts in a cleaning agent (sodium nitrite 0.3wt%, sodium carbonate 0.5wt%, the balance is water) at 60°C, and use an ultrasonic cleaner (power 0.5W / cm 2 ) Clean the parts for 10 minutes, then rinse the metal parts with water at 80-90°C for 5 minutes, and place them in a dryer at 60°C for 2 hours to dry;

[0037] 2) Soak the cleaned parts in an activator at 90-100°C, the components and mass percentage of the activator are: 5wt% Na 2 B 4 o 7 , 1.5 wt% NH 4 Cl, the balance is water;

[0038] 3) Aluminum plating on the surface of metal parts by hot-dip aluminum plating: immerse the metal parts after surface activation in immersion plating solution at 550°C for 4 minutes. The composition and mass percentage of the immersion plating solution are:...

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Abstract

The invention relates to a method for preventing C4F7N corrosion by metal surface treatment of electrical insulation equipment. The method comprises the following steps of (1) cleaning the surface ofa component of the electrical insulation equipment contacting C4F7N gas to remove oil stains on the surface of the component; (2) carrying out activating treatment on the component to activate the metal surface of the component; (3) plating aluminum on the surface of the component; and (4) carrying out oxidation treatment on the surface of the component to form a layer of a compact aluminum oxidefilm on the surface of the component. According to the method, a metal material inside the electric insulation equipment can be effectively prevented from being corroded by the gas insulation medium C4F7N at higher temperature, the service life of the electric insulation equipment is prolonged, meanwhile, the C4F7N and the metal material are prevented from being reacted and decomposed, the electric insulation level of the insulation gas is guaranteed, the normal working operation of electric equipment is prevented from being influenced, toxic gas is prevented from being generated, the operation process is simple, and the method has good engineering application value.

Description

technical field [0001] The invention belongs to the technical field of gas insulated switchgear, in particular to a metal surface treatment of electrical insulation equipment to prevent perfluoroisobutyronitrile (C 4 f 7 N) Method of gas corrosion. Background technique [0002] Due to the traditional insulating gas sulfur hexafluoride (SF 6 ) has attracted much attention to the environmental problems brought about, and domestic and foreign electrical manufacturers are actively looking for alternatives to SF 6 Gas is an environmentally friendly insulating gas. C 4 f 7 N gas has good insulation performance, low greenhouse effect potential index (GWP), stable chemical properties, and low acute inhalation toxicity, which is the most potential SF at present. 6 One of the alternative gases. [0003] C 4 f 7 N is easy to corrode metal materials in electrical equipment during practical application, which will not only degrade the performance of metal parts in insulating equ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C23C2/26C23C2/02C23C8/12C22C21/02
CPCC22C21/02C23C2/02C23C2/12C23C2/26C23C8/12
Inventor 肖淞张晓星唐炬卫卓石生尧闫永旭庞轩佩韩森浩陈昱佐莫俊业
Owner WUHAN UNIV
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