Corrosion-resistant and wear-resistant composite coating for metal surface and preparing method thereof

A composite coating, metal surface technology, applied in the direction of metal material coating process, coating, gaseous chemical plating, etc., can solve the problems of poor corrosion resistance and wear resistance, and improve corrosion resistance and wear resistance. Good continuity and uniform coating effect

Inactive Publication Date: 2016-11-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the disadvantages of poor corrosion resistance and wear resistance existing in the prior art, the invention discloses a metal surface corrosion and wear resistance composite coating and a preparation method thereof. The composite coating prepared by the method improves metal Corrosion resistance and wear resistance of the substrate surface

Method used

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  • Corrosion-resistant and wear-resistant composite coating for metal surface and preparing method thereof

Examples

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Effect test

Embodiment 1

[0017] Using titanium alloy TC4 as the metal / alloy substrate, the titanium alloy TC4 was first polished and cleaned, then placed in the atomic layer deposition reaction chamber, and the chamber was evacuated; fumaric acid and trimethylaluminum (TMA ) as the source, and the source temperatures are 170°C and 35°C respectively; with Ar as the carrier gas, the temperature of the reaction chamber is set at 200°C, and a 50 nm thick Al-fumaric acid hybrid film is deposited; then the titanium alloy sample is placed In a tube furnace, it was annealed at 600 °C for 1 h in a vacuum environment to obtain an Al-doped carbon coating, that is, an Al-C coating; finally, the above sample was placed in an atomic layer deposition reaction chamber, and trimethyl Aluminum is the aluminum source, the source temperature is set to 35 °C, H 2 O was the oxygen source, 10 nm thick Al was deposited at 100 °C 2 o 3 , and finally form Al-C / Al on the surface of titanium alloy TC4 2 o 3 Composite coating...

Embodiment 2

[0020] Using titanium alloy TC4 as the metal / alloy substrate, the titanium alloy TC4 is first polished and cleaned, then loaded in the atomic layer deposition reaction chamber, and the chamber is evacuated; using fumaric acid and trimethylaluminum as the source , the source temperatures are 170°C and 30°C respectively; 2 As the carrier gas, the temperature of the reaction chamber was set at 300 °C, and a 200 nm thick Al-fumaric acid hybrid film was deposited; then the titanium alloy sample was placed in a tube furnace, and annealed at 600 °C for 1 h in a vacuum environment , to obtain an Al-doped carbon coating, that is, an Al-C coating; finally, the above sample was placed in an atomic layer deposition reaction chamber, with trimethylaluminum as the aluminum source, and the source temperature was set at 30 °C, H 2 O was the oxygen source, 10 nm thick Al was deposited at 100 °C 2 o 3 , to get the final Al-C / Al 2 o 3 Composite coating.

Embodiment 3

[0022] Using aluminum alloy as the metal / alloy substrate, the aluminum alloy is first polished and cleaned, then loaded in the atomic layer deposition reaction chamber, and the chamber is evacuated; with fumaric acid and trimethylaluminum as the source, the source The temperatures are 150°C and 35°C respectively; 2 As the carrier gas, the temperature of the reaction chamber is 180°C, and an 80nm-thick Al-fumaric acid hybrid film is deposited; then the aluminum alloy sample is placed in a tube furnace, annealed in a vacuum environment, and annealed at 500°C After 2 hours, the Al-doped carbon coating, that is, the Al-C coating was obtained; finally, the above sample was placed in the atomic layer deposition reaction chamber, with trimethylaluminum as the aluminum source, the source temperature was 35 ° C, H 2 O was the oxygen source, and 20 nm thick Al was deposited at 300 °C 2 o 3 , to obtain the final Al-C / Al surface of the aluminum alloy 2 o 3 Composite coating.

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Abstract

The invention discloses a corrosion-resistant and wear-resistant composite coating for a metal surface. The composite coating is an Al-C and Al2O3 composite coating, the composite coating is sequentially an Al-C coating and an Al2O3 layer on the metal surface from the surface layer to the outer layer, and the deposition thickness of Al2O3 in the Al-C and Al2O3 composite coating is 10-50 nanometers. The invention further discloses a preparing method. According to the corrosion-resistant and wear-resistant composite coating prepared by the method, an Al-fumaric acid hybrid film coating in the composite coating is even, has great continuity and can avoid the defect of through holes, so that metal is protected from corrosion on the surface of a base layer; the Al-C coating has great wear resistance, so that the wear resistance of the metal is improved; and an amorphous aluminum oxide layer in the composite coating further improves corrosion resistance and wear resistance.

Description

technical field [0001] The invention belongs to the field of corrosion and protection of substrate surfaces, in particular to a metal surface anti-corrosion and wear-resistant composite coating and a preparation method thereof. Background technique [0002] Metal materials have the characteristics of high strength, excellent electrical and thermal conductivity, good plasticity and formability, and easy processing, and are widely used in civil facilities, aerospace, military industry, construction, automobiles, ships and other fields. Among them, in some specific environmental applications, there are often higher requirements for metals / alloys. For example, the basic parts of stainless steel mechanical movement, including gears, valves, slides, sealing rings, etc., are one of the key components of pump valve pipelines, hydraulic and power transmission systems that are in direct contact with the water environment, and their service life The reliability and safety largely depe...

Claims

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Application Information

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IPC IPC(8): C23C16/30C23C16/40C23C16/455C23C16/56
CPCC23C16/30C23C16/403C23C16/45555C23C16/56
Inventor 孔继周周飞王谦之尹亮
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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