CN101153390A - Chemical nickel plating solution for magnesium alloy and nickeling technique thereof - Google Patents
Chemical nickel plating solution for magnesium alloy and nickeling technique thereof Download PDFInfo
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- CN101153390A CN101153390A CNA2006101223873A CN200610122387A CN101153390A CN 101153390 A CN101153390 A CN 101153390A CN A2006101223873 A CNA2006101223873 A CN A2006101223873A CN 200610122387 A CN200610122387 A CN 200610122387A CN 101153390 A CN101153390 A CN 101153390A
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Abstract
The invention discloses a magnesium alloy chemical nickel plating solution and the nickel plating process thereof, wherein, the solution comprises basic chemical nickel plating solution and acidic nickel plating solution; the pH value of the basic chemical nickel plating solution is maintained between 7.5 and 9.5 and the solution contains 5g to 40g nickel sulfate, 5g to 30g sodium citrate, 5g to 25g ammonium bifluoride and 10g to 30g sodium hypophosphite per liter; the pH value of the acidic nickel plating solution is maintained between 5.0 to 7.0 and the solution contains 5g to 35g nickel sulfate, 8g to 20g sodium citrate, 8g to 20g sodium acetate, 6g to 30g sodium hypophosphite and 5g to 25g ammonium bifluoride per liter. With the composition, chemical plating is completed through adopting the treatment steps including (a) pretreatment, (b) activating treatment, (c) basic chemical nickel plating, (d) acidic chemical nickel plating and (e) roasting. Due to adopting fluoride-free chromium-free chemical plating process, the invention effectively solves the problems of high cost and severe pollution of magnesium alloy chemical nickel plating.
Description
Technical field
The present invention relates to the non-electrolysis tech of a kind of magnesium alloy, particularly relate to a kind of solution and processing method thereof that is used for magnesium alloy surface chemical plating nickel.
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, mobile telephone, 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.
Therefore, be necessary the corrosion resistance nature of magnesium alloy is done further to improve.
Summary of the invention
In view of the above problems, the invention provides a kind of environment-friendly type and magnesium alloy chemical nickel plating solution and nickel plating technology thereof cheaply.
For achieving the above object, the present invention has adopted following technical scheme: a kind of magnesium alloy chemical nickel plating solution and nickel plating technology thereof.Wherein, this nickel plating solution comprises:
One alkaline electroless plating nickel solution, its pH value are between 7.5～9.5, and it is solvent with water, contain in every liter of solution:
Single nickel salt 5～40 grams;
Trisodium Citrate 5～30 grams;
Hydrogen fluoride ammonia 5～25 grams;
Sodium hypophosphite 10～30 grams; And
One acid chemical plating nickel solution, its pH value are between 5.0～7.0, and it is solvent with water, contain in every liter of solution:
Single nickel salt 5～35 grams;
Trisodium Citrate 8～20 grams;
Sodium-acetate 8～20 grams;
Inferior sodium phosphate 6～30 grams;
Hydrogen fluoride ammonia 5～25 grams.
In addition, the invention allows for a kind of chemical nickel plating process on magnesium alloy, its key step comprises:
A. pre-treatment is earlier carried out ash disposal successively with a magnesium alloy test product, cleans, is dried, surface sand-blasting;
B. activation treatment will impregnated in through the magnesium alloy test product that above-mentioned steps was handled in the activated solution, to generate a chemical conversion film;
C. alkaline chemical nickel-plating impregnated in the magnesium alloy sample with chemical conversion film on it in above-mentioned alkaline electroless plating nickel solution;
D. acid chemical plating nickel impregnated in the magnesium alloy sample after above-mentioned steps is handled in the above-mentioned acid chemical plating nickel solution at last;
E. after treatment magnesium alloy sample is toasted in baking.
Preferable, the invention allows for a kind of chemical nickel plating process on magnesium alloy, wherein, also need be between above-mentioned per two steps through the step of ultrasonic wave deionization washing.And above-mentioned steps a is in the process of carrying out surface sand-blasting, and air pressure remains on 0.03～0.07Mpa, and the gravel that uses is brown corundum, white fused alumina, iron sand and the granulated glass sphere etc. of size between 80～200 orders.
Preferable, the invention allows for a kind of chemical nickel plating process on magnesium alloy, wherein, the pH value of the activated solution among the described step b is 5.5, and contains in every liter of activated solution:
Hydrogen fluoride ammonia 2～10 grams;
Ammonium di-hydrogen phosphate 1～5 gram;
Boric acid 1.0～2.0 grams;
Propionic acid 2.0～5.0 grams.
With this magnesium alloy sample after above-mentioned activated solution is handled 1～10 minute, wash, and impregnated in above-mentioned pH value and remain on 7.5～9.5, temperature is in 50～75 ℃ alkaline electroless plating nickel solution, handle after 10～60 minutes, take out this magnesium alloy sample and wash from this solution, subsequently this magnesium alloy sample be impregnated in and handled in the above-mentioned acid chemical plating nickel solution 10～120 minutes, and this acid chemical plating nickel solution pH value remains on 5.0～7.0, temperature is 100～300 ℃ in temperature and toasted 10～180 minutes down between 75～95 ℃ after above-mentioned processing.
Above-mentioned technical scheme forms one an alkaline chemical nickel-plating-phosphorus layer and an electroless nickel-phosphorus plating layer successively on Mg alloy surface, formed coating corrosion resistance is good.
Embodiment
Below in conjunction with specific embodiment a kind of magnesium alloy chemical nickel plating solution and nickel plating technology thereof proposed by the invention are described in further detail.
Embodiment 1:
Earlier by following each reagent that takes by weighing:
Single nickel salt 30 grams;
Trisodium Citrate 25 grams;
Hydrogen fluoride ammonia 15 grams;
Sodium hypophosphite 30 grams;
Respectively with less water dissolving, mixed diluting to 1 liter then, and the pH value of solution is adjusted to 8.0 with strong aqua and sulfuric acid can obtain an alkaline electroless plating nickel solution with mentioned reagent;
And then by following each reagent that takes by weighing:
Single nickel salt 25 grams;
Trisodium Citrate 15 grams;
Sodium-acetate 10 grams;
Inferior sodium phosphate 25 grams;
Hydrogen fluoride ammonia 15 grams.
Respectively with less water dissolving, mixed diluting to 1 liter then, and the pH value of solution is adjusted to 5.4 with strong aqua and sulfuric acid can obtain an acid chemical plating nickel solution with mentioned reagent;
In addition, also need prepare a chemical activation liquid, its pH value is 5.5, and by the following reagent that takes by weighing:
Hydrogen fluoride ammonia 8 grams;
Ammonium di-hydrogen phosphate 5 grams;
Boric acid 2 grams;
Propionic acid 4 grams.
Respectively with less water dissolving, mixed diluting to 1 liter then, and the pH value of solution is adjusted to 5.5 with strong aqua and sulfuric acid can obtain a chemical activation solution with mentioned reagent.
Get a magnesium alloy sample, it is carried out chemical nickel plating handle, its step is as follows:
Earlier this magnesium alloy sample is carried out pre-treatment, with its surface ash disposal successively, clean, dry, for further removing the spot on this magnesium alloy sample surfaces, keep 0.03～0.07Mpa at air pressure, utilize the gravels such as brown corundum, white fused alumina, iron sand and granulated glass sphere of size between 80～200 orders that this magnesium alloy sample is done surperficial sandblasting; Cleaned this sample 1～10 minute with the ultrasonic water that involves subsequently, to remove the gravel that may stay after the sandblast; And for this magnesium alloy sample is not corroded, this sample is impregnated in the above-mentioned chemical activation solution for preparing handled 10 minutes, to generate a chemical conversion film; Afterwards, also need to clean this sample with the ultrasonic water that involves; Place the above-mentioned alkaline electroless plating nickel solution for preparing to handle 15 minutes in this sample after cleaning up, temperature remains on 50 ℃; Certainly, this sample also needs to clean with the ultrasonic water that involves after above-mentioned processing, again this sample be impregnated in the above-mentioned acid chemical plating nickel solution after cleaning up, treatment temp is 80 ℃, and the treatment time is 120 minutes, at last this magnesium alloy sample is toasted after water cleans with ultrasonic involving, storing temperature is 180 ℃, storing time is 60 minutes, after above-mentioned steps, can finish the nickel plating at this magnesium alloy sample surfaces.
Embodiment 2:
Earlier by following each reagent that takes by weighing:
Single nickel salt 20 grams;
Trisodium Citrate 10 grams;
Hydrogen fluoride ammonia 10 grams;
Sodium hypophosphite 20 grams;
Respectively with less water dissolving, mixed diluting to 1 liter then, and the pH value of solution is adjusted to 8.0 with strong aqua and sulfuric acid can obtain an alkaline electroless plating nickel solution with mentioned reagent;
And then by following each reagent that takes by weighing:
Single nickel salt 15 grams;
Trisodium Citrate 8 grams;
Sodium-acetate 8 grams;
Inferior sodium phosphate 15 grams;
Hydrogen fluoride ammonia 10 grams.
Respectively with less water dissolving, mixed diluting to 1 liter then, and the pH value of solution is adjusted to 5.5 with strong aqua and sulfuric acid can obtain an acid chemical plating nickel solution with mentioned reagent;
In addition, also need prepare a chemical activation liquid, its pH value is 5.5, and by the following reagent that takes by weighing:
Hydrogen fluoride ammonia 5 grams;
Ammonium di-hydrogen phosphate 3 grams;
Boric acid 1.5 grams;
Propionic acid 3 grams.
Respectively with less water dissolving, mixed diluting to 1 liter then, and the pH value of solution is adjusted to 5.5 with strong aqua and sulfuric acid can obtain a chemical activation solution with mentioned reagent.
Get a magnesium alloy sample, it is carried out chemical nickel plating handle, its step is as follows:
Earlier this magnesium alloy sample is carried out pre-treatment, with its surperficial ash disposal, clean, dry, for further removing the spot on this magnesium alloy sample surfaces, keep 0.03～0.07Mpa at air pressure, utilize the gravels such as brown corundum, white fused alumina, iron sand and granulated glass sphere of size between 80～200 orders that this magnesium alloy sample is done surperficial sandblasting; Cleaned this sample 1～10 minute with the ultrasonic water that involves subsequently, to remove the gravel that may stay after the sandblast; And for this magnesium alloy sample is not corroded, this sample is impregnated in the above-mentioned chemical activation solution for preparing handled 10 minutes, to generate a chemical conversion film; Afterwards, also need to clean this sample with the ultrasonic water that involves; Place the above-mentioned alkaline electroless plating nickel solution for preparing to handle 30 minutes in this sample after cleaning up, temperature remains on 50 ℃; Certainly, this sample also needs to clean with the ultrasonic water that involves after above-mentioned processing, again this sample be impregnated in the above-mentioned acid chemical plating nickel solution after cleaning up, treatment temp is 80 ℃, and the treatment time is 100 minutes, at last this magnesium alloy sample is toasted after water cleans with ultrasonic involving, storing temperature is 180 ℃, storing time is 60 minutes, after above-mentioned steps, can finish the nickel plating at this magnesium alloy sample surfaces.
Claims (8)
1. magnesium alloy chemical nickel plating solution, this solution comprises:
One alkaline electroless plating nickel solution, its pH value are between 7.5～9.5, and it is solvent with water, contain in every liter of solution:
Single nickel salt 5～40 grams;
Trisodium Citrate 5～30 grams;
Hydrogen fluoride ammonia 5～25 grams;
Sodium hypophosphite 10～30 grams; And
One acid chemical plating nickel solution, its pH value are between 5.0～7.0, and it is solvent with water, contain in every liter of solution:
Single nickel salt 5～35 grams;
Trisodium Citrate 8～20 grams;
Sodium-acetate 8～20 grams;
Inferior sodium phosphate 6～30 grams;
Hydrogen fluoride ammonia 5～25 grams.
2. chemical nickel plating process on magnesium alloy, its step mainly comprises:
A. pre-treatment is earlier carried out ash disposal with a magnesium alloy test product, cleans, is dried, surface sand-blasting;
B. activation treatment will impregnated in the activated solution through the magnesium alloy test product that above-mentioned steps was handled, and generates a chemical conversion film;
C. alkaline chemical nickel-plating impregnated in the magnesium alloy sample with chemical conversion film on it in above-mentioned alkaline electroless plating nickel solution;
D. acid chemical plating nickel impregnated in the magnesium alloy sample after above-mentioned steps is handled in the above-mentioned acid chemical plating nickel solution at last;
E. after treatment magnesium alloy sample is toasted in baking.
3. chemical nickel plating process on magnesium alloy according to claim 2 is characterized in that, also need be through the step of ultrasonic wave deionization washing between above-mentioned per two steps.
4. chemical nickel plating process on magnesium alloy according to claim 2, it is characterized in that, in the surface sand-blasting process of above-mentioned steps a, air pressure remains on 0.03～0.07Mpa, and the gravel that uses is brown corundum, white fused alumina, iron sand and the granulated glass sphere of size between 80～200.
5. chemical nickel plating process on magnesium alloy according to claim 2 is characterized in that, the pH value of described activated solution is 5.5, and contains in every liter of activated solution:
Hydrogen fluoride ammonia 2～10 grams;
Ammonium di-hydrogen phosphate 1～5 gram;
Boric acid 1.0～2.0 grams;
Propionic acid 2.0～5.0 grams.
6. chemical nickel plating process on magnesium alloy according to claim 2, it is characterized in that, among the step c this magnesium alloy sample be impregnated in the above-mentioned alkaline electroless plating nickel solution and handled 10～60 minutes, and this solution pH value remains on 7.5～9.5, temperature is between 50～75 ℃.
7. chemical nickel plating process on magnesium alloy according to claim 2, it is characterized in that, in the steps d this magnesium alloy sample be impregnated in and handled in the above-mentioned acid chemical plating nickel solution 10～120 minutes, and this solution pH value remains on 5.0～7.0, temperature is between 75～95 ℃.
8. chemical nickel plating process on magnesium alloy according to claim 2 is characterized in that, the baking among the step e is to be 100～300 ℃ in temperature to toast 10～180 minutes down.
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| CNB2006101223873A CN100570000C (en) | 2006-09-25 | 2006-09-25 | A kind of magnesium alloy chemical nickel plating solution and nickel plating technology thereof |
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| CNB2006101223873A CN100570000C (en) | 2006-09-25 | 2006-09-25 | A kind of magnesium alloy chemical nickel plating solution and nickel plating technology thereof |
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| CN101153390A true CN101153390A (en) | 2008-04-02 |
| CN100570000C CN100570000C (en) | 2009-12-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880871A (en) * | 2010-06-10 | 2010-11-10 | 沈阳理工大学 | Replenishment method suitable for magnesium alloy direct chemical nickel-plating solution |
| CN103215574A (en) * | 2013-04-18 | 2013-07-24 | 江门市瑞期精细化学工程有限公司 | Magnesium-alloy chemical nickel plating solution and nickel plating process thereof |
| CN104152872A (en) * | 2013-05-14 | 2014-11-19 | 汉达精密电子(昆山)有限公司 | Magnesium alloy treatment method and product |
| CN105779977A (en) * | 2016-02-15 | 2016-07-20 | 深圳市瑞世兴科技有限公司 | Palladium activating solution for nickel plating of magnesium alloy and nickel plating method of magnesium alloy |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941525B (en) * | 2012-11-23 | 2014-09-10 | 江苏顺发电热材料有限公司 | Electrothermal tube barrel burnishing process |
-
2006
- 2006-09-25 CN CNB2006101223873A patent/CN100570000C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880871A (en) * | 2010-06-10 | 2010-11-10 | 沈阳理工大学 | Replenishment method suitable for magnesium alloy direct chemical nickel-plating solution |
| CN103215574A (en) * | 2013-04-18 | 2013-07-24 | 江门市瑞期精细化学工程有限公司 | Magnesium-alloy chemical nickel plating solution and nickel plating process thereof |
| CN104152872A (en) * | 2013-05-14 | 2014-11-19 | 汉达精密电子(昆山)有限公司 | Magnesium alloy treatment method and product |
| CN104152872B (en) * | 2013-05-14 | 2016-09-07 | 汉达精密电子(昆山)有限公司 | Magnesium alloy processing method and products thereof |
| CN105779977A (en) * | 2016-02-15 | 2016-07-20 | 深圳市瑞世兴科技有限公司 | Palladium activating solution for nickel plating of magnesium alloy and nickel plating method of magnesium alloy |
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| CN100570000C (en) | 2009-12-16 |
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Granted publication date: 20091216 Termination date: 20110925 |