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Ship metal component coated with rare earth ceramic electric insulation coating and preparation method of ship metal component

A technology of ceramic coating and metal parts, which is applied to the metal parts coated with rare earth ceramic electrical insulating coating for ships and the field of preparation thereof, and can solve the problems of short service life of ships and the like

Active Publication Date: 2017-06-13
WUCHANG SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a metal part coated with a rare earth ceramic electrical insulation coating for a ship and a preparation method thereof, so as to solve the technical problem of the short service life of the ship caused by the bonding strength of the resin coating and the metal matrix

Method used

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  • Ship metal component coated with rare earth ceramic electric insulation coating and preparation method of ship metal component
  • Ship metal component coated with rare earth ceramic electric insulation coating and preparation method of ship metal component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: the end face of the metal base is roughened by sand blasting with a particle size of 0.42 to 0.85mm, and then a 0.03mm thick YSZ layer (Y 2 o 3 The mass percentage is 3%, and the rest is ZrO 2 ); the surface of the YSZ layer is coated with 0.03mm thick polyurea as the sealing layer, and the appearance of the prepared rare earth ceramic electrical insulating coating is shown in figure 2 , its resistance ≥ 700MΩ. Wherein the bonding strength between the YSZ layer and the metal substrate is ≥ 20MPa, and the bonding strength between the YSZ layer and the polyurea layer is ≥ 10MPa. After 11MPa and 48 hours of water pressure, the rare earth ceramic electrical insulation coating did not experience any water seepage.

Embodiment 2

[0051] Embodiment 2: The end face of the metal substrate is roughened by sand blasting with a particle size of 0.42mm to 0.85mm, and then a 0.5mm thick YSZ layer (Y 2 o 3 The mass percentage is 12%, and the rest is ZrO 2 ); the surface of the YSZ layer is coated with a 0.1mm thick fluorocarbon coating as a sealing layer, and the resistance of the prepared rare earth ceramic electrical insulation coating is ≥700MΩ. Among them, the bonding strength between the YSZ layer and the metal substrate is ≥ 20MPa, and the bonding strength between the YSZ layer and the fluorocarbon coating layer is ≥ 10MPa.

Embodiment 3

[0052] Embodiment 3: the metal substrate end face is roughened by sand blasting with a particle size of 0.42mm to 0.85mm, and then sprayed with a 0.3mm thick YSZ layer (Y 2 o 3 The mass percentage is 6%, and the rest is ZrO 2 ); the surface of the YSZ layer is coated with a 0.05mm thick fluorocarbon coating as a sealing layer, and the resistance of the prepared rare earth ceramic electrical insulation coating is ≥700MΩ. Among them, the bonding strength between the YSZ layer and the metal substrate is ≥ 20MPa, and the bonding strength between the YSZ layer and the fluorocarbon coating layer is ≥ 10MPa.

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Abstract

The invention discloses a ship metal component coated with a rare earth ceramic electric insulation coating. The ship metal component comprises a metal matrix and the rare earth ceramic electric insulation coating coating all outer surfaces of the metal matrix, wherein the rare earth ceramic electric insulation coating comprises a rare earth ceramic coating and a hole sealing coating, the rare earth ceramic coating is a YSZ layer or an LZ layer, the YSZ layer comprises Y2O3 and ZrO2, the LZ layer comprises La2O3 and ZrO2, and the hole sealing coating specifically is polyurea or fluorocarbon. The coating thickness of the rare earth ceramic coating ranges from 0.03 mm to 0.5 mm, and the coating thickness of the hole sealing coating ranges from 0.03 mm to 0.1 mm. By means of the breaking tenacity and the electric insulating performance of rare earth ceramic and the weather fastness and leakproofness of the hole sealing coating, the surface of the rare earth ceramic coating is coated with the polyurea or fluorocarbon, the electric insulation coating with large binding strength, impact resistance and the excellent electrical insulation performance is formed, and the requirement for long-term using of sea pipeline metal components of seaborne ships and submarines is met.

Description

technical field [0001] The present application relates to the technical field of electrochemical corrosion and protection of ships at sea, in particular to a metal part coated with a rare earth ceramic electrical insulation coating for ships and a preparation method thereof. Background technique [0002] Ships at sea use a large number of metals of different materials. If the potential difference between different metals exceeds 0.1mV, galvanic corrosion will occur between the two. The larger the potential difference, the more serious the galvanic corrosion, which seriously threatens the service life of the ship. . In addition, galvanic corrosion generates currents and magnetic fields that interfere with the normal transmission of radio signals. Therefore, the electrical insulation of seawater pipelines is an urgent problem to be solved. [0003] Conventional electrical insulating coatings are alumina-based ceramic coatings and various resin coatings. [0004] For example...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/11
Inventor 黄晓黎曹学强樊爱春
Owner WUCHANG SHIPBUILDING IND
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