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Plating liquid for nickel-titanium alloy to coat nickel, cobalt and tungsten through chemical technology and technique method

A technology of chemical plating solution and chemical nickel plating, which is applied in the direction of liquid chemical plating, metal material coating process, coating, etc., and can solve problems such as no literature reports

Inactive Publication Date: 2005-08-31
TONGJI HOSPITAL ATTACHED TO TONGJI MEDICAL COLLEGE HUAZHONG SCI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, although there are many processes and patents related to electroless nickel plating, there is no literature report on electroless nickel-cobalt-tungsten plating, especially the research on electroless nickel-cobalt-tungsten alloy film plating on the surface of nickel-titanium alloy

Method used

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  • Plating liquid for nickel-titanium alloy to coat nickel, cobalt and tungsten through chemical technology and technique method
  • Plating liquid for nickel-titanium alloy to coat nickel, cobalt and tungsten through chemical technology and technique method
  • Plating liquid for nickel-titanium alloy to coat nickel, cobalt and tungsten through chemical technology and technique method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of No. 1 electroless plating solution, its preparation step is:

[0028] 1. Weigh sodium citrate (Na 3 C 6 h 5 o 2 )26.0g and ammonium sulfate ((NH 4 ) 2 SO 4 ) 40.0g was added into a beaker, and dissolved in 300ml of distilled water to obtain a solution;

[0029] 2. Weigh the metered nickel sulfate (NiSO 4 ·6H 2 O) 5.0g, cobalt sulfate (CoSO 4 ·6H 2 O) 23.0g, sodium tungstate (Na 2 WO 4 ) 0.3g was added to the beaker in turn, and dissolved in 400ml of distilled water to obtain a solution;

[0030] 3. Add the solution obtained in step 2 into the solution obtained in step 1 under stirring to obtain a mixed solution;

[0031] 4. Weigh sodium hypophosphite (NaH 2 PO 2 ·H 2 O) 17.0g was added into a beaker, and dissolved in 200ml of distilled water to obtain a solution;

[0032] 5. Slowly add the solution obtained in step 4 into the mixed solution obtained in step 3 under stirring to obtain a mixed solution;

[0033] 6. Use 15wt% ammonia wa...

Embodiment 2

[0035] The preparation of No. 2 electroless plating solution, its preparation steps are:

[0036] 1. Weigh sodium citrate (Na 3 C 6 h 5 o 2 )29.0g and ammonium sulfate ((NH 4 ) 2 SO 4 ) 58.0g was added into a beaker, and dissolved in 300ml of distilled water to obtain a solution;

[0037] 2. Weigh nickel sulfate (NiSO 4 ·6H 2 O) 5.0g, cobalt sulfate (CoSO 4 ·6H 2 O) 25.0g, sodium tungstate (Na 2 WO 4 ) 0.8g was added to the beaker in turn, and dissolved in 400ml of distilled water to obtain a solution;

[0038] 3. Add the solution obtained in step 2 into the solution obtained in step 1 under stirring to obtain a mixed solution;

[0039] 4. Weigh sodium hypophosphite (NaH 2 PO 2 ·H 2 O) 19.0g was added into a beaker, and dissolved in 200ml of distilled water to obtain a solution;

[0040] 5. Slowly add the solution obtained in step 4 into the mixed solution obtained in step 3 under stirring to obtain a mixed solution;

[0041] 6. Adjust the pH value of the mix...

Embodiment 3

[0043] The preparation of No. 3 electroless plating solution, its preparation steps are:

[0044] 1. Weigh sodium citrate (Na 3 C 6 h 5 o 2 )36.0g and ammonium sulfate ((NH 4 ) 2 SO 4 ) 70.0g was added into a beaker, and dissolved in 300ml of distilled water to obtain a solution;

[0045] 2. Weigh nickel sulfate (NiSO 4 ·6H 2 O) 13.0g, cobalt sulfate (CoSO 4 ·6H 2 O) 30.0g, sodium tungstate (Na 2 WO 4 ) 3.3g was added to the beaker in turn, and dissolved in 400ml of distilled water to obtain a solution;

[0046] 3. Add the solution obtained in step 2 into the solution obtained in step 1 under stirring to obtain a mixed solution;

[0047] 4. Weigh sodium hypophosphite (NaH 2 PO 2 ·H 2 O) 25.0g is added in a beaker, and dissolved in 200ml of distilled water to obtain a solution;

[0048] 5. Slowly add the solution obtained in step 4 into the mixed solution obtained in step 3 under stirring to obtain a mixed solution;

[0049] 6. Adjust the pH value of the mixed s...

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Abstract

A plating liquid for chemically plating the magnetic NiCoW film on the surface of NiTi alloy is an aqueous solution containing nickel sulfate, cobalt sulfate, sodium tungstate, sodium hypophosphite, sodium citrate and ammonium sulfate. Its chemical plating process includes such steps as alkali washing of said surface of NiTi alloy, acid washing, sensitizing, activating, immersing it in said plating liquid and chemical plating. The plated product can be used as the medical magnetic scaffold for physiotherapy and chemicotherapy.

Description

technical field [0001] The invention relates to a treatment method for plating an alloy film on the surface of a nickel-titanium alloy, in particular to an electroless plating solution and a process method for chemically plating a nickel-cobalt-tungsten alloy film on the surface of a nickel-titanium alloy. Background technique [0002] Nickel-titanium alloy is a functional alloy with superelasticity and shape memory functions. It is widely used in aerospace, chemical, medical and other fields. For example, medical stents used clinically to treat stenosis in the human body are made of nickel-titanium shape memory alloys. These stents have achieved great success in the clinical treatment of pipeline stenosis, but unfortunately they only have a physical therapy effect and cannot implement chemical drug therapy. Clinically, it is found that the tumor cells will continue to grow and pass through the stent, or grow along the stent to both ends, which will block the pipeline again...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/16C23C18/18
Inventor 程海斌官建国程旭东袁润章张清杰陶剑青许帅周泽祥邹声泉李占飞童立恒郭伟张林
Owner TONGJI HOSPITAL ATTACHED TO TONGJI MEDICAL COLLEGE HUAZHONG SCI TECH
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