A metal surface treatment of electrical insulation equipment to prevent c 4 f 7 n corrosion method
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: 2021-07-30
WUHAN UNIV
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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
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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 metal surface treatment of electrical insulation equipment to prevent C 4 f 7 The method of N corrosion, the steps are as follows: 1) Contact C to the electrical insulation equipment 4 f 7 Clean the surface of the component with N gas to remove the oil on the surface of the component; 2) Activate the component to activate the metal surface of the component; 3) Plating aluminum on the surface of the component; 4) Oxidize the surface of the component to form a dense layer on the surface of the component aluminum oxide film. This method can effectively prevent gas insulation medium C 4 f 7 N corrodes the metal material inside the electrical insulation equipment at a higher temperature, prolongs the service life of the electrical insulation equipment, and at the same time, prevents C 4 f 7 N reacts and decomposes with metal materials to ensure the electrical insulation level of the insulating gas, avoid affecting the normal operation of electrical equipment, and prevent the generation of toxic gases. The operation process is simple and 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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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