Thermal spraying long-acting corrosion-resistant protective coating on surface of grounding electrode and preparation method of thermal spraying long-acting corrosion-resistant protective coating

A technology of protective coating and surface spraying, applied in the direction of coating, metal material coating process, melt spraying, etc., to achieve the effect of low cost, improved wettability, and improved long-term corrosion resistance

Active Publication Date: 2022-07-22
国网黑龙江省电力有限公司大兴安岭供电公司 +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to solve the problem of avoiding or reducing the corrosion of the ground electrode, providing a long-term corrosion-resistant protective coating of thermal spraying on the surface of the ground electrode and its preparation method

Method used

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  • Thermal spraying long-acting corrosion-resistant protective coating on surface of grounding electrode and preparation method of thermal spraying long-acting corrosion-resistant protective coating
  • Thermal spraying long-acting corrosion-resistant protective coating on surface of grounding electrode and preparation method of thermal spraying long-acting corrosion-resistant protective coating
  • Thermal spraying long-acting corrosion-resistant protective coating on surface of grounding electrode and preparation method of thermal spraying long-acting corrosion-resistant protective coating

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specific Embodiment approach 1

[0021] Embodiment 1: In this embodiment, a thermal sprayed long-term corrosion-resistant protective coating on the surface of the ground electrode is composed of a corrosion-resistant isolation layer and a corrosion-resistant function enhancement layer, wherein the corrosion-resistant isolation layer has a thickness of 50-250 μm, and the corrosion-resistant function The thickness of the reinforcement layer is 100-300 μm.

specific Embodiment approach 2

[0022] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the thickness of the corrosion-resistant isolation layer is 100-200 μm; the thickness of the corrosion-resistant function enhancement layer is 150-250 μm. Others are the same as the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the corrosion-resistant isolation layer is composed of 1-5% rare earth material, 1-10% carbon material, 20-80% by mass percentage It is composed of cermet material and the balance of nickel-based metal material; wherein, the rare earth material is one or two of cerium oxide and yttrium oxide mixed in any ratio, and the particle size is 5-40nm; the carbon material is conductive graphite, conductive acetylene carbon , One or more of carbon nanotubes are mixed in any ratio, the particle size is 5-20nm, the size of carbon nanotubes is 1-5nm in diameter and 5-20μm in length; the cermet material is Cr 3 C 2 -Ni, WC-Co, WC-Co-Cr, Cr 3 C 2 -NiCr, Cr 3 C 2 - One or more of CoNiCrAlY and WC-FeCrAl are mixed in any ratio, and the particle size is 30-80 μm; the nickel-based metal is one or more of stainless steel, nickel-chromium alloy, and Ni60, and the particle size is mixed in any ratio. 20 t...

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Abstract

The invention discloses a thermal spraying long-acting corrosion-resistant protective coating on the surface of a grounding electrode and a preparation method of the thermal spraying long-acting corrosion-resistant protective coating, and relates to the thermal spraying long-acting corrosion-resistant protective coating on the surface of the grounding electrode and the preparation method. In order to solve the problem of avoiding or reducing the corrosion of the grounding electrode, the grounding electrode is used as a substrate, and a corrosion-resistant isolation layer and a corrosion-resistant function enhancement layer are prepared on the surface of the substrate by adopting a thermal spraying technology to construct a long-acting corrosion-resistant protective coating; the corrosion-resistant isolation layer is a composite coating of rare earth, a carbon material, metal ceramic and nickel-based metal prepared by thermal spraying, and the corrosion-resistant function enhancement layer is a soft metal coating which is prepared by thermal spraying and can be used as a sacrificial anode. The method is easy to operate, low in cost and suitable for industrialization, and the prepared coating has the advantages of being high in compactness, low in porosity, good in corrosion resistance and good in conductivity. The method is applied to the technical field of grounding electrode surface treatment.

Description

Technical field: [0001] The invention relates to a thermally sprayed long-acting corrosion-resistant protective coating on the surface of a ground electrode and a preparation method thereof. Background technique: [0002] At present, grounding has become an important measure to ensure the safe operation and personal safety of power systems and building facilities. Lightning terminals, down conductors, and surge protectors can quickly discharge strong lightning currents into the ground only through good grounding devices. The grounding electrode is the core component of the grounding device, and it is in the underground or dark and humid environment for a long time. Corrosion and fracture occur under the influence of various factors. After the grounding electrode is corroded, the grounding electrode material is damaged, and the surface corrosion products will cause poor grounding performance, which cannot meet the requirements for thermal and dynamic stability during leakage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23F13/14C23C4/08C23C4/129C23C4/134
CPCC23C4/06C23F13/14C23C4/08C23C4/129C23C4/134
Inventor 赵文林李亚妮谭霄峰刘晓磊张成马丽丽
Owner 国网黑龙江省电力有限公司大兴安岭供电公司
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