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Wear-resistant and corrosion-resistant nano-aluminum nitride composite coating

A nano-aluminum nitride and composite coating technology, which is applied in the fields of electrochemistry and metal surface treatment, can solve the problems of less protective measures, achieve the effects of reducing processing steps, enhancing bonding strength, and improving corrosion resistance and wear resistance

Active Publication Date: 2020-01-21
江苏丰辉高空建筑防腐有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problem in the prior art that there are few protective measures for the marine environment in the various components of electronic equipment in the marine development process, the present invention provides a wear-resistant and corrosion-resistant nano-aluminum nitride composite coating to obtain a composite coating with strength in the marine environment. Large, wear-resistant, corrosion-resistant composite coating

Method used

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  • Wear-resistant and corrosion-resistant nano-aluminum nitride composite coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A 50 μm Ni-Al composite layer is obtained by low-pressure plasma spraying technology, and the spraying material is aluminum-coated nickel composite powder. The aluminum-clad nickel composite powder is directly purchased with a bulk density of not less than 3.25g / cm 3 Aluminum clad nickel composite powder for thermal spraying. A 30 μm Al-AlN composite layer was sprayed on the Ni-Al composite layer by low-pressure plasma spraying technology. The mixing molar ratio of aluminum and nano-aluminum nitride powder is 3:1. The aluminum content in the obtained Al-AlN composite layer was 88.52ωt%.

Embodiment 2

[0029] The 200μm Ni-Al composite layer was obtained by inert gas protection plasma spraying technology, and the spraying material was aluminum-coated nickel composite powder. The aluminum-clad nickel composite powder is directly purchased with a bulk density of not less than 3.25g / cm 3 Aluminum clad nickel composite powder for thermal spraying. A 100 μm Al-AlN composite layer was sprayed on the Ni-Al composite layer by inert gas shielded plasma spraying technology. The mixing molar ratio of aluminum and nano-aluminum nitride powder is 4:1. The aluminum content in the obtained Al-AlN composite layer was 90.63ωt%.

Embodiment 3

[0031] A 100 μm Ni-Al composite layer is obtained by low-pressure plasma spraying technology, and the spraying material is aluminum-coated nickel composite powder. The aluminum-clad nickel composite powder is directly purchased with a bulk density of not less than 3.25g / cm 3Aluminum clad nickel composite powder for thermal spraying. A 50 μm Al-AlN composite layer was sprayed on the Ni-Al composite layer by supersonic flame spraying technology. The mixing molar ratio of aluminum and nano-aluminum nitride powder is 5:1. The aluminum content in the obtained Al-AlN composite layer was 92.05ωt%. When the Al-AlN composite layer is sprayed with supersonic flame, the oxygen in the air will react with the aluminum to form a small amount of Al2O3 doped in the coating to enhance the corrosion resistance and wear resistance and high temperature thermal stability of the coating. However, the increase of oxygen content in the coating will reduce the shear strength of the coating.

[003...

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Abstract

The invention provides a wear-resistant and corrosion-resistant nano aluminum nitride composite coating. The wear-resistant and corrosion-resistant nano aluminum nitride composite coating sequentially comprises a bonding bottom layer and a corrosion-resistant and wear-resistant functional layer from inside to outside. The bonding bottom layer is a Ni-Al composite layer, and the corrosion-resistant and wear-resistant functional layer is an Al-AlN composite layer; and the content of aluminum in the Al-AlN composite layer is 88.2wt%-92.1wt%. The wear-resistant and corrosion-resistant nano aluminum nitride composite coating is good in corrosion-resistant and wear-resistant performance, high in hardness, and strong in bonding force with a base material, and can serve as the corrosion-resistant and wear-resistant protective coating of each workpiece in equipment and instruments of the marine environment, and the equipment loss of marine development is reduced.

Description

technical field [0001] The invention relates to the technical field of electrochemistry and metal surface treatment, in particular to a wear-resistant and corrosion-resistant nano-aluminum nitride composite coating. Background technique [0002] With the rise of emerging marine industries such as maritime transportation, deep-sea mining, port terminals, oil and gas development, and marine biotechnology, coupled with the significant increase in oil and gas exploration and production activities in deep-sea development in recent years, the scale of human development and utilization of the ocean has continued to expand. , Gradually move from tradition to depth. It is precisely because the marine economy and marine industry play an extremely important role in the development of human society, so the development of anti-corrosion coatings and technologies for various equipment and devices in the marine environment will become the focus of research. The marine environment is a ver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/08C23C4/06C23C4/129C23C4/134C23C4/137
CPCC23C4/06C23C4/08C23C4/129C23C4/134C23C4/137
Inventor 王志国
Owner 江苏丰辉高空建筑防腐有限公司