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Titanium alloy parts protection and its preparation method and uses of hydrogen prevention crisp

A technology of titanium alloy and protective layer, applied in the field of protective materials

Active Publication Date: 2008-06-25
中科西卡思(苏州)科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of preventing hydrogen infiltration by plating gold film on the surface of titanium alloy has not been reported at home and abroad.

Method used

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  • Titanium alloy parts protection and its preparation method and uses of hydrogen prevention crisp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The transitional nickel layer and gold layer were coated on the tensile test piece to test its tensile properties. The coating process is as follows:

[0026] Chemical degreasing → water washing → oxidation film removal → water washing → immersion in catalytic solution → water washing → electroless nickel plating → electroplating gold → heat treatment.

[0027] 1. Chemical degreasing: Put the titanium alloy substrate into the degreasing liquid, heat until the degreasing liquid boils, and continue heating for 3 minutes to stop.

[0028] 2. Washing: Rinse the test piece with water to prevent residual degreasing liquid on the surface of the test piece.

[0029] 3. Membrane removal: HNO 3 (70%) 27.5ml / L;

[0030] HF (40%) 225ml / L;

[0031] Temperature: room temperature

[0032] Time: 20~30s

[0033] After removing the film and washing with water, the test piece has a bright metallic luster.

[0034] 4. Catalysis: HF (40%) 250ml / L;

[0035] ...

Embodiment 2

[0061] Coat the transition nickel layer and gold layer on the tensile cylinder of Φ25mm*26mm, and test its bonding strength. The coating process is as follows:

[0062] Chemical degreasing → water washing → oxidation film removal → water washing → immersion in catalytic solution → water washing → electroless nickel plating → electroplating gold → heat treatment.

[0063] 1. Chemical degreasing: put the cylinder into the degreasing liquid, heat until the degreasing liquid boils, continue heating for 3 minutes and stop.

[0064] 2. Water washing: Rinse the cylinder with water to prevent residual degreasing liquid on the surface of the cylinder and inside the threads.

[0065] 3. Film removal: Same as Example 1

[0066]4. Catalysis: HF (40%) 200ml / L;

[0067] CrO 3 130g / L;

[0068] SbF 3 2g / L;

[0069] Temperature 50°C

[0070] Catalytic time 60min

[0071] After the cylinder is catalyzed and washed with distilled water, a laye...

example 3

[0087] Coat the transitional nickel layer and gold layer on the wafer of Ф50mm*2mm, and test its corrosion resistance. The coating process is as follows:

[0088] Chemical degreasing → water washing → oxidation film removal → water washing → immersion in catalytic solution → water washing → electroless nickel plating → electroplating gold → heat treatment.

[0089] 1. Chemical degreasing: Same as Example 1.

[0090] 2. Washing: Same as Example 1.

[0091] 3. Film removal: Same as Example 1

[0092] 4. Catalysis: HF (40%) 220ml / L;

[0093] CrO 3 135g / L;

[0094] SbF 3 3g / L;

[0095] Temperature 50°C

[0096] Catalytic time 30min

[0097] After the wafer is catalyzed and washed with distilled water, a layer of dark gray film is formed on the surface. The color changes with the newness of the catalytic solution, temperature and time, which is a normal phenomenon.

[0098] 5. Formula and parameters of electroless nickel pla...

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Abstract

The invention relates to a protective layer for titanium alloy parts, a preparation method and application thereof to prevent hydrogen brittleness. The preparation method mainly comprises the processes of oil removal, membrane removal, catalyzing, chemical nickel plating, gold electroplating and heat treatment. A fluoride membrane is formed on the surface of the prepared titanium alloy substrate;a nickel phosphorus transition layer is plated on the fluoride membrane; a dense gold layer with a thickness of 5 to 20Mum is plated on the transition layer. The invention can effectively prevent thetitanium alloy from hydrogen brittleness in hydrogen atmosphere.

Description

technical field [0001] The invention relates to a titanium alloy surface protective layer and a treatment method, in particular to a hydrogen embrittlement-proof protective layer for titanium alloy parts, a preparation method and application thereof, and belongs to the field of protective materials. Background technique [0002] Titanium and its alloys have a series of excellent properties and are widely used in industrial production such as aviation, aerospace, chemical industry, petroleum, metallurgy, light industry, electric power, seawater desalination, ships and daily life appliances, and are known as modern metals. However, in the early stage of production and use of titanium and its alloys, brittle fracture due to the action of hydrogen often occurred. With the improvement of titanium metallurgy and manufacturing level, the hydrogen content in titanium and its alloys is significantly reduced, and hydrogen embrittlement problems caused by metallurgy and manufacturing r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/04B32B33/00B32B9/00C23C28/02C23C18/18C23C18/32C25D3/48C25D5/50
Inventor 盛晓晨都徽乐军赵荣根
Owner 中科西卡思(苏州)科技发展有限公司
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