Bionic gradient antifouling composite coating and preparation method thereof

A composite coating and gradient technology, which is applied in coating, metal material coating process, fusion spraying, etc., can solve the problems of insufficient toughness, improve toughness and bonding strength, avoid frequent powder replacement, and improve coating consistency. effect of density

Pending Publication Date: 2021-08-17
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology

Plasma sprayed ceramic coatings have a similar layered structure to shells, but since there is no soft material between the ceramic layers, the toughness is far less than that of shell materials

Method used

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  • Bionic gradient antifouling composite coating and preparation method thereof

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Embodiment 1

[0024] Such as figure 1 As shown, in this embodiment, a dense bonding layer is deposited on the metal substrate, and a dense gradient composite coating is deposited on the surface of the bonding layer.

[0025] In this embodiment, the material of the metal base is 45 steel.

[0026] In this embodiment, the composition of the bonding layer is NiCrAl; the composition of the gradient composite coating is Al 2 o 3 -13%TiO 2 , Modified NiCrAlY, navy copper HSn70-1.

[0027] In this embodiment, the thickness of the bonding layer is 100 μm, and the thickness of the gradient composite coating is 400 μm.

[0028] combine figure 1 , a preparation method of bionic gradient antifouling composite coating, comprising the following steps:

[0029] Step 1, use coarse sandpaper (100#) to polish the surface of the metal substrate sample, then use alcohol to clean, sandblast the sample, install the sample after alcohol ultrasonic cleaning;

[0030] Step 2, using a gas mask to protect the ...

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Abstract

A bionic gradient antifouling composite coating comprises a base body, a metal bonding layer is deposited on the base body, and a gradient composite coating with the ceramic content gradually increased and the metal content gradually reduced from the surface of the base material to the surface of the coating is deposited on the bonding layer; and the gradient composite coating is of a block-like compact layered structure. A preparation method of the bionic gradient antifouling composite coating comprises the following steps that (1) the surface of the metal base body is polished and subjected to sand blasting treatment; (2) a metal bonding layer is deposited on the surface of the base body through gas hood protection plasma spraying; (3) an atmosphere plasma spraying method is adopted, the powder proportion during spraying is adjusted, and a gradient composite coating with the ceramic content gradually increased and the metal content gradually reduced from the surface of the base material to the surface of the coating is deposited on the surface of the metal bonding layer. According to the gradient composite interface structure, the interface bonding strength can be improved, the density of the coating is improved, the corrosion resistance and toughness of the coating are improved, and the biofouling resistance can be achieved through adjustment of a metal phase.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a bionic gradient antifouling composite coating and a preparation method thereof. Background technique [0002] Pneumatic, hydraulic devices, various valves and other motion auxiliary parts are widely used in almost all marine equipment such as military and civilian ships, submarines, and offshore platforms, and are one of the core components of marine equipment. Marine corrosion and biofouling are the main reasons for the failure of sub-category parts of marine environmental sports during service. The most important way to improve the reliability and service life of such parts is to protect the surface of metal moving parts such as structural steel from corrosion and wear through coating technology. Plasma spraying ceramic coating is an important technical means to prepare such coatings. [0003] Plasma sprayed ceramic coating after sealing treatment is the mainst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/073C23C4/02C23C4/10
CPCC23C4/134C23C4/073C23C4/02C23C4/10
Inventor 姚建洮马群董会
Owner XI'AN PETROLEUM UNIVERSITY
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