CN101096757A - Magnesium alloy surface multilayer nickel plating solution and its multilayer nickel plating technique - Google Patents
Magnesium alloy surface multilayer nickel plating solution and its multilayer nickel plating technique Download PDFInfo
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- CN101096757A CN101096757A CNA2006100362667A CN200610036266A CN101096757A CN 101096757 A CN101096757 A CN 101096757A CN A2006100362667 A CNA2006100362667 A CN A2006100362667A CN 200610036266 A CN200610036266 A CN 200610036266A CN 101096757 A CN101096757 A CN 101096757A
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Abstract
The invention discloses a multilayer nickel solution on the magnesium alloy surface and the multilayer nickel process. The multilayer nickel solution on the magnesium alloy surface comprises low-phosphorus, proper phosphorus, high-phosphorus nickel solution, wherein the formulation of low-phosphorus nickel solution comprises 10-50g/L nickel sulfate, 10-50g/L sodium acetate, 10-50g/L sodium hypophosphite, 10-50g/L sodium citrate; the formulation of proper phosphorus nickel solution comprises 10-50g/L nickel sulfate, 10-50g/L sodium acetate, 10-50g/L sodium hypophosphite, 10-50g/L ammonium acid fluoride, 0.001-0.020g/L sulfourea; the formulation of high-phosphorus nickel solution comprises 10-50g/L nickel sulfate, 10-50g/L sodium acetate, 10-50g/L sodium hypophosphite. The process comprises the following steps: degreasing the magnesium alloy surface and removing the oxidation film; washing with the water; activating; washing with water; coating multilayer; washing with the water; drying. The nickel of the invention is provided with good corrosion resistance, good metallic luster, which can be used for the outside surface.
Description
Technical field
The present invention relates to a kind of magnesium alloy surface treatment Ji Intraoperative, particularly relate to a kind of Mg alloy surface nickel plating solution and multiple layer nickel plating technique thereof.
Background technology
Magnesium alloy is as the trend of 21st century material, subtract declining property and good hertzian wave barrier property etc. and be subjected to the welcome of industry with its low density, high vibration, particularly magnesium alloy is widely applicable in the light-weighted goods such as computer, mobil phone, trolley part in recent years.Yet the etching problem that the chemically reactive of magnesium alloy is brought but becomes the principal element that its performance of restriction should have superiority, and therefore, the solidity to corrosion that strengthens magnesium alloy has important demonstration meaning.And the corrosion prevention problem of solution magnesium alloy for large-scale commercial production, adopts protective membrane and coating to handle, and is the most economically viable method, and the common thickness of protective film that present technology is generated is on the low side, and its solidity to corrosion can't reach actual demand.
Summary of the invention
The objective of the invention is to propose a kind of Mg alloy surface multiple layer nickel plating solution and multiple layer nickel plating technique thereof.
Mg alloy surface multiple layer nickel plating solution of the present invention comprises low phosphorus content nickel plating solution, middle phosphorus content nickel plating solution, high content of phosphorus nickel plating solution.
Wherein, described low phosphorus content nickel plating solution is the aqueous solution that is grouped into by following one-tenth, promptly contains in every liter of this solution:
Single nickel salt 10～50 grams
Sodium-acetate 10～50 grams
Sodium hypophosphite 10～50 grams
Trisodium Citrate 10～50 grams
And phosphorus content nickel plating solution in described is a solvent with water, contains in its every liter this solution:
Single nickel salt 10～50 grams
Sodium-acetate 10～50 grams
Sodium hypophosphite 10～50 grams
Ammonium bifluoride 10～50 grams
Thiocarbamide 0.001～0.020 gram
And described high content of phosphorus nickel plating solution is a solvent with water, contains in its every liter this solution:
Single nickel salt 10～50 grams
Sodium-acetate 10～50 grams
Sodium hypophosphite 10～50 grams
In addition, carry out magnesium alloy multilayer plating nickel plating technology with multiple layer nickel plating solution of the present invention, its technical process is the Mg alloy surface degreasing and removes oxide film → washing → activation → washing → multilayer plating → washing → oven dry; Wherein these technology concrete steps are:
A. earlier sandblasting is carried out on the magnesium alloy component surface of a cleaning surfaces, then according to this by washing again after alkali cleaning and the pickling;
B. this magnesium alloy component be impregnated in 5～20% the hydrofluoric acid solution again and carry out activation treatment, its working temperature is 20～60 ℃, floods to take out after 5～20 minutes to wash;
C. under temperature is 50～70 ℃ condition, to impregnated in according to this through the magnesium alloy component of above-mentioned processing in described middle phosphorus content nickel plating solution, high content of phosphorus nickel plating solution, the low phosphorus content nickel plating solution and carry out plating, its dipping time was respectively 10～40 minutes, and pH value is respectively 4.5～6.5.
D. at last the magnesium alloy component after the above-mentioned processing is washed oven dry again, and then carry out sealing of hole.
The composition that the invention has the advantages that this Mg alloy surface multiple layer nickel plating solution is simple; preparation is convenient; cost is low; various constituent concentrations can change in a big way; be fit to large-scale production; the nickel layer that adopts this technology to generate had 3 once; the 1st layer is middle phosphorus layer, is covered in Mg alloy surface, and purpose is to prevent that magnesium alloy is by excessive corrosion; the 2nd layer is the high phosphorus layer; its phosphorus content is 12% probably, is used to strengthen the protection to Mg alloy surface, and uppermost one deck is low-phosphorous layer; phosphorus content is about 5%, is used for protecting above-mentioned high phosphorus layer.This nickel layer can be by 24 hours salt mist experiments and the surface does not have corrosion, and its nickel layer has metalluster, can do appearance.
Embodiment
Embodiment one
Dispose described solution respectively according to following prescription, wherein,
The low phosphorus content nickel plating solution:
Single nickel salt 24 grams
Sodium-acetate 20 grams
Sodium hypophosphite 18 grams
Trisodium Citrate 14 grams
Middle phosphorus content nickel plating solution:
Single nickel salt 18 grams
Sodium-acetate 17 grams
Sodium hypophosphite 17 grams
Ammonium bifluoride 36 grams
Thiocarbamide 0.01 gram
The high content of phosphorus nickel plating solution:
Single nickel salt 18 grams
Sodium-acetate 17 grams
Sodium hypophosphite 32 grams
The AZ91D magnesium alloy component of choosing a cleaning surfaces carries out sandblasting as sample with this sample surfaces, then according to this by washing after alkali cleaning and the pickling again; At ambient temperature this magnesium alloy sample be impregnated in again in 10% the hydrofluoric acid solution and carry out activation treatment, flood to take out after 10 minutes and wash; Then this magnesium alloy sample is immersed above-mentioned middle phosphorus content nickel plating solution, its working temperature is 60 ℃, pH value is adjusted to 6.4 by ammoniacal liquor, reaction times is 20 minutes, again this magnesium alloy sample is placed above-mentioned high content of phosphorus nickel plating solution to soak after the washing 30 minutes, its working temperature is 60 ℃, pH value is adjusted to 5.5 by ammoniacal liquor, again it is immersed in the above-mentioned low phosphorus content nickel plating solution after the washing, its working temperature is 60 ℃, and pH value is adjusted to 6.5 by ammoniacal liquor, and the reaction times is 20 minutes, at last the magnesium alloy component after the above-mentioned processing is washed oven dry again, and then carry out sealing of hole.With the 5%NaCl salt-fog test test of this AZ91D magnesium alloy sample through 24h, reach 10 grades of corrosion, and its nickel layer is silver color, metalluster is arranged.
Embodiment two
Dispose described solution respectively according to following prescription, wherein,
The low phosphorus content nickel plating solution:
Single nickel salt 38 grams
Sodium-acetate 18 grams
Sodium hypophosphite 20 grams
Trisodium Citrate 15 grams
Middle phosphorus content nickel plating solution:
Single nickel salt 20 grams
Sodium-acetate 15 grams
Sodium hypophosphite 15 grams
Ammonium bifluoride 30 grams
Thiocarbamide 0.02 gram
The high content of phosphorus nickel plating solution:
Single nickel salt 25 grams
Sodium-acetate 15 grams
Sodium hypophosphite 35 grams
The AZ91D magnesium alloy component of choosing a cleaning surfaces carries out sandblasting as sample with this sample surfaces, then according to this by washing after alkali cleaning and the pickling again; At ambient temperature this magnesium alloy sample be impregnated in again in 10% the hydrofluoric acid solution and carry out activation treatment, flood to take out after 10 minutes and wash; Then this magnesium alloy sample is immersed above-mentioned middle phosphorus content nickel plating solution, its working temperature is 60 ℃, pH value is adjusted to 6.1 by ammoniacal liquor, reaction times is 20 minutes, again this magnesium alloy sample is placed above-mentioned high content of phosphorus nickel plating solution to soak after the washing 30 minutes, its working temperature is 60 ℃, pH value is adjusted to 5.5 by ammoniacal liquor, again it is immersed in the above-mentioned low phosphorus content nickel plating solution after the washing, its working temperature is 60 ℃, and pH value is adjusted to 6.3 by ammoniacal liquor, and the reaction times is 20 minutes, at last the magnesium alloy component after the above-mentioned processing is washed oven dry again, and then carry out sealing of hole.With the 5%NaCl salt-fog test test of this AZ91D magnesium alloy sample through 24h, reach 10 grades of corrosion, and its nickel layer is silver color, metalluster is arranged.
Claims (4)
1. Mg alloy surface multiple layer nickel plating solution, this solution mainly comprises low phosphorus content nickel plating solution, middle phosphorus content nickel plating solution, high content of phosphorus nickel plating solution, and wherein, above-mentioned three kinds of solution are all with water as solvent, and its prescription is respectively:
The low phosphorus content nickel plating solution:
Single nickel salt 10～50 grams per liters
Sodium-acetate 10～50 grams per liters
Sodium hypophosphite 10～50 grams per liters
Trisodium Citrate 10～50 grams per liters
Middle phosphorus content nickel plating solution:
Single nickel salt 10～50 grams per liters
Sodium-acetate 10～50 grams per liters
Sodium hypophosphite 10～50 grams per liters
Ammonium bifluoride 10～50 grams per liters
Thiocarbamide 0.001～0.020 grams per liter
The high content of phosphorus nickel plating solution:
Single nickel salt 10～50 grams per liters
Sodium-acetate 10～50 grams per liters
Sodium hypophosphite 10～50 grams per liters
2. Mg alloy surface multiple layer nickel plating solution according to claim 1 is characterized in that the screening formulation of this solution is:
The low phosphorus content nickel plating solution:
Single nickel salt 24 grams per liters
Sodium-acetate 20 grams per liters
Sodium hypophosphite 18 grams per liters
Trisodium Citrate 14 grams per liters
Middle phosphorus content nickel plating solution:
Single nickel salt 18 grams per liters
Sodium-acetate 17 grams per liters
Sodium hypophosphite 17 grams per liters
Ammonium bifluoride 36 grams per liters
Thiocarbamide 0.01 grams per liter
The high content of phosphorus nickel plating solution:
Single nickel salt 18 grams per liters
Sodium-acetate 17 grams per liters
Sodium hypophosphite 32 grams per liters
3. Mg alloy surface multiple layer nickel plating technique, its technical process is the Mg alloy surface degreasing and removes oxide film → washing → activation → washing → multilayer plating → washing → oven dry, wherein the nickel plating step in the flow process is specially: be under 50～70 ℃ the condition in temperature, to impregnated in according to this through the magnesium alloy component of pre-treatment in the described middle phosphorus content nickel plating solution of claim 1, high content of phosphorus nickel plating solution, the low phosphorus content nickel plating solution and carry out plating, its dipping time was respectively 10～40 minutes, and pH value is respectively 4.5～6.5.
4. Mg alloy surface multiple layer nickel plating technique according to claim 3 is characterized in that, the nickel layer that this multiple layer nickel plating technique generates comprised three once altogether, and wherein, the first layer is middle phosphorus layer, is attached at the magnesium alloy basal plane; The second layer is high adjacent bed, and the 3rd layer is low-phosphorous layer.
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| CNA2006100362667A CN101096757A (en) | 2006-06-30 | 2006-06-30 | Magnesium alloy surface multilayer nickel plating solution and its multilayer nickel plating technique |
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| CNA2006100362667A CN101096757A (en) | 2006-06-30 | 2006-06-30 | Magnesium alloy surface multilayer nickel plating solution and its multilayer nickel plating technique |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094192A (en) * | 2011-03-15 | 2011-06-15 | 北京交通大学 | Method for preparing plating solution for chemical nickel plating on surface of aluminum alloy and method for regenerating waste plating solution |
| CN102560450A (en) * | 2012-01-18 | 2012-07-11 | 湖南正圆动力配件有限公司 | Process for coating nickel transition layer |
| CN101760732B (en) * | 2009-11-16 | 2012-07-25 | 海洋王照明科技股份有限公司 | Chemical nickel plating process for surface of magnesium alloy and chemical nickel plating solution |
| CN101736333B (en) * | 2010-01-18 | 2013-03-13 | 海洋王照明科技股份有限公司 | Aluminium alloy workpiece surface treatment method and aluminium alloy workpiece |
| CN111394716A (en) * | 2019-01-03 | 2020-07-10 | 泰科电子(上海)有限公司 | Multi-coating stacked structure, preparation method and application thereof |
-
2006
- 2006-06-30 CN CNA2006100362667A patent/CN101096757A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760732B (en) * | 2009-11-16 | 2012-07-25 | 海洋王照明科技股份有限公司 | Chemical nickel plating process for surface of magnesium alloy and chemical nickel plating solution |
| CN101736333B (en) * | 2010-01-18 | 2013-03-13 | 海洋王照明科技股份有限公司 | Aluminium alloy workpiece surface treatment method and aluminium alloy workpiece |
| CN102094192A (en) * | 2011-03-15 | 2011-06-15 | 北京交通大学 | Method for preparing plating solution for chemical nickel plating on surface of aluminum alloy and method for regenerating waste plating solution |
| CN102094192B (en) * | 2011-03-15 | 2012-10-31 | 北京交通大学 | Method for preparing plating solution for chemical nickel plating on surface of aluminum alloy and method for regenerating waste plating solution |
| CN102560450A (en) * | 2012-01-18 | 2012-07-11 | 湖南正圆动力配件有限公司 | Process for coating nickel transition layer |
| CN102560450B (en) * | 2012-01-18 | 2013-07-31 | 湖南正圆动力配件有限公司 | Process for coating nickel transition layer |
| CN111394716A (en) * | 2019-01-03 | 2020-07-10 | 泰科电子(上海)有限公司 | Multi-coating stacked structure, preparation method and application thereof |
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