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A corrosion-resistant grounding grid cermet coating material and its preparation device and method

A metal-ceramic coating and metal-ceramic technology, which is applied in the direction of metal material coating process, coating, molten spraying, etc., can solve the problem that the thermal stability of the grounding body cannot be guaranteed to meet the requirements, and the corrosion of the grounding grid and the damage of the grounding body cannot be prevented. problems, achieve excellent oxidation resistance, good electrical conductivity, and prolong service life

Inactive Publication Date: 2017-08-01
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, there have been a large number of researches on the corrosion behavior and diagnosis of grounding grids in China, but little attention has been paid to the development and testing of new protective coatings and the application in the anti-corrosion of grounding grids.
[0004] The Chinese patent "A new type of anti-corrosion grounding body with cathodic protection function and its manufacturing method" "public number: 102544779A" proposes a new type of anti-corrosion grounding body with cathodic protection function and its manufacturing method. There are one or more anode installation grooves with inner width and outer narrowness, and the anode material used as anode is arranged in the anode installation grooves, so as to prevent the grounding body from being corroded, but this method will cause damage to the grounding body itself , the thermal stability of the grounding body cannot be guaranteed to meet the requirements
However, the cathodic protection method is very expensive to maintain. If the maintenance is not timely, it will not be able to prevent the grounding grid from being corroded, and the problem will not be solved fundamentally.

Method used

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  • A corrosion-resistant grounding grid cermet coating material and its preparation device and method
  • A corrosion-resistant grounding grid cermet coating material and its preparation device and method
  • A corrosion-resistant grounding grid cermet coating material and its preparation device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The Q235 steel is processed into an 8*10mm rectangular actual workpiece, which is ground step by step with diamond sandpaper, and then the surface of the Q235 steel is mechanically polished. The polished sample is ultrasonically cleaned in alcohol and then dried to obtain a Q235 steel sample.

[0067] Put the Q235 steel sample into the supersonic flame spraying instrument ZB-2000HVOF, put the No. 1 powder into the powder feeder ZB-2000F, the powder feeding voltage is 5.5V, the number of spraying layers is 2 layers, and the temperature is controlled at 1889°C , the spraying speed is 389m / s, a nickel-based titanium nitride cermet coating is deposited on the surface of the Q235 steel sample, and the thickness of the deposited nickel-based titanium nitride cermet coating is 20 μm.

Embodiment 2

[0069] The Q235 steel is processed into an 8*10mm rectangular actual workpiece, which is ground step by step with diamond sandpaper, and then the surface of the Q235 steel is mechanically polished. The polished sample is ultrasonically cleaned in alcohol and then dried to obtain a Q235 steel sample.

[0070] Put the Q235 steel sample into the supersonic flame spraying instrument ZB-2000HVOF, put the No. 1 powder into the powder feeder ZB-2000F, the powder feeding voltage is 6V, the number of spraying layers is 4 layers, and the temperature is controlled at 1725°C. The spraying speed was 389m / s, and the nickel-based titanium nitride cermet coating was deposited on the surface of the Q235 steel sample, and the thickness of the deposited nickel-based titanium nitride cermet coating was 40 μm.

Embodiment 3

[0072] The Q235 steel is processed into an 8*10mm rectangular actual workpiece, which is ground step by step with diamond sandpaper, and then the surface of the Q235 steel is mechanically polished. The polished sample is ultrasonically cleaned in alcohol and then dried to obtain a Q235 steel sample.

[0073] Put the Q235 steel sample into the supersonic flame spraying instrument ZB-2000HVOF, put the No. 1 powder into the powder feeder ZB-2000F, the powder feeding voltage is 5V, the number of spraying layers is 6 layers, and the temperature is controlled at 1793°C. The spraying speed was 406m / s, and the nickel-based titanium nitride cermet coating was deposited on the surface of the Q235 steel sample, and the thickness of the deposited nickel-based titanium nitride cermet coating was 60 μm.

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Abstract

The invention relates to the technical field of metal materials, in particular to a corrosion-resistant grounding grid metal ceramic coating material and a preparation device and method thereof. The material is prepared from, by weight, 20-60 parts of titanium nitride and 40-80 parts of nickel. The preparation device comprises a combustion chamber. The combustion chamber is connected with a combustion-supporting chamber. The combustion-supporting chamber is connected with a Laval spray pipe. The Laval spray pipe is connected with a nozzle. The combustion chamber is provided with a fuel pipe nozzle, an oxygen pipe nozzle, an igniter and a first powder feed nozzle. The combustion-supporting chamber is provided with a compressed air pipe nozzle. Two second powder feed nozzles are vertically and symmetrically distributed on the nozzle. The preparation method comprises the steps of cleaning the grounding grid material, conducting burdening, conducting ball milling refining, conducting drying, mixing a forming agent, forming a raw material, removing the forming agent and depositing a titanium nitride metal ceramic coating on the surface of a metal ceramic matrix through the high velocity oxy-fuel technology. The material is better in wear resistance, corrosion resistance and oxidization resistance and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a corrosion-resistant grounding grid cermet coating material and a preparation device and method thereof. Background technique [0002] The grounding grid is a necessary facility to ensure the safe operation of power generation, transformation and transmission system equipment and personal safety. Due to resource and economic reasons, galvanized carbon steel is mainly used as the grounding grid material in my country. This material has been in a complex soil environment for a long time, and corrosion is inevitable. According to literature reports, the corrosion of power grounding grids in my country is relatively serious, and there are varying degrees of corrosion in almost every province's power grounding grids, especially in humid and rainy South China and Central China, where galvanized steel that has been in operation for 3-5 years is severely corroded , and even corr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/16C22C19/03C22C32/00C23C4/06C23C4/129
CPCC22C19/03C22C29/16C22C32/0068C23C4/06
Inventor 邹少勇邓海峰李志平聂道琦王民波蔡蕾肖东刘文俊邓长征
Owner STATE GRID CORP OF CHINA
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