CN1323918A - Chemical Ni-P plating process with high compactedness and high corrosion resitance - Google Patents
Chemical Ni-P plating process with high compactedness and high corrosion resitance Download PDFInfo
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- CN1323918A CN1323918A CN 01112669 CN01112669A CN1323918A CN 1323918 A CN1323918 A CN 1323918A CN 01112669 CN01112669 CN 01112669 CN 01112669 A CN01112669 A CN 01112669A CN 1323918 A CN1323918 A CN 1323918A
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Abstract
A process of chemical nickel-phosphorus coating film with high compactness and high anticorrosino ability includes the steps: (1). preparing the deoxidation distilled water solution containing wetting agent and complexing agent which are polyethylene glycol and/or trisodium citrate, (2). increasing the temperature of the solution up to 40-70 deg.C, (3). selecting the chemical formulation and processing condition for the coating workpiece, coating period of time according to coating speed, (4). after a period of coating, to take out the workpiece and putting it into the deoxidation distilled water solution for removal of the hydrogen on the surface of it, (5). repeating the workpiece coating and hydrogen removal process.
Description
What the present invention relates to is a kind of plated film technology, and the chemical Ni-P plating process of particularly a kind of high-compactness and high anti-corrosion belongs to metal heat treatmet class electroless plating field.
Chemical plating nickel-phosphorus alloy has been widely used in industrial circle as anti-corrosion protective coating; but in the existing chemical plating nickel technology; bring gas hole defect by the hydrogen that side reaction produced in the chemical plating nickel-phosphorus alloy process to coating; the solidity to corrosion of coating is descended, limited the range of application of chemical nickel plating.The method that improves corrosion resistance of coating at present mainly contains two kinds: the one, select for use to make more fine and close complexing agent of coating and stablizer; The 2nd, improve the composition of coating.But these methods all can not fine elimination coating in hydrogen be detained the small hole that is produced, greatly reduce the solidity to corrosion of amorphous deposit.As Chinese patent, application number is: 89104018, and invention is artificial: Shen Wei etc., denomination of invention is: the solution of chemical plating of corrosion resisting amorphous phosphorus-nickel alloy and method.Use this method to the workpiece plating, workpiece surface has hydrogen adsorption all the time, makes coating form pin hole, and solidity to corrosion descends.
The objective of the invention is to overcome deficiency of the prior art, the chemical Ni-P plating process of a kind of high-compactness and high anti-corrosion is provided.
Technical scheme of the present invention and performance are as follows: the present invention adopts repeatedly plating and is interrupted the method for removing coating surface hydrogen and realizes purpose of the present invention.Coating process is specific as follows: 1. preparation contains the deoxidation distilled water solution of wetting agent and network and agent, the wetting agent that uses in the deoxidation distilled water solution, complexing agent is polyoxyethylene glycol and/or trisodium citrate, 2. solution is warming up to 40-70 ℃, 3. specify under electroless plating prescription and the processing condition the workpiece plating, it is fixed that the length of plating time is come according to plating speed, height plates speed promptly:＞25 μ m/h got 5-10 minute, hang down plating speed promptly: 6-12 μ m/h got 15-30 minute, 4. after plating for some time, take out workpiece and put into deoxidation distilled water solution its surface removal hydrogen, during to the workpiece surface dehydrogenation, the aqueous solution will be got well in the workpiece surface flowability, promptly form strong flow, and reduce the time that workpiece is detained as far as possible in atmosphere, 5. repeat workpiece plating and dehydrogenation process at workpiece surface.
Example below further is provided:
One, the plating speed of the used plating bath of setting is 6 μ m/h, and the volume of desire plating workpiece is 30cm
2Thickness of coating requires 12 μ m, 1. compound concentration is the 2g/L polyoxyethylene glycol, 1 liter of the distilled water solution of 10g/L trisodium citrate, put into water-bath and heat up up to boiling, be cooled to 30 ℃ then, 2. workpiece is through sand papering, alkaline degreasing, behind the clear water cleaning down, pickling is 30 seconds in 15% hydrochloric acid, through the clear water cleaning down, in 1.5% hydrochloric acid, activate 30 seconds more then, through the distillation washing, 3. workpiece is put into immediately and specified the plating bath chemical nickel plating to take out after 30 minutes, put into aforementioned distilled water solution with strong current flushing 2 minutes, soaked 1 minute, 4. workpiece nickel plating 30 minutes once more, take out, put into aforementioned distilled water solution once more with strong current flushing 2 minutes, 5. workpiece nickel plating 30 minutes again plate 4 times so repeatedly, taking-up is also used flushing with clean water, and it is higher to obtain the coating density, the uniform nickel-phosphorus alloy coating that solidity to corrosion is more excellent.
The coating of gained and ordinary method gained coating are carried out the solidity to corrosion comparative experiments in the 5%Nacl aqueous solution prove, under the same conditions, the time that first hot spot occurs with ordinary method gained coating is after the plating the 10th day, and the time that first hot spot appears in this routine gained coating is after the plating the 19th day.
Two, the plating speed of the used plating bath of setting is 30 μ m/h, and the volume of desire plating workpiece is 30cm
2Thickness of coating requires 12 μ m, 1. compound concentration is the 2g/L polyoxyethylene glycol, water-soluble 1 liter of the distillation of 10gL trisodium citrate, put into water-bath and heat up up to boiling, be cooled to 50 ℃ then, 2. workpiece is through sand papering, alkaline degreasing, behind the clear water cleaning down, pickling is 30 seconds in 15% hydrochloric acid, through the clear water cleaning down, in 1.5% hydrochloric acid, activate 30 seconds more then, through the distillation washing, 3. workpiece is put into immediately and specified the plating bath chemical nickel plating to take out after 20 minutes, put into aforementioned distilled water solution with strong current flushing 2 minutes, soaked 1 minute, 4. workpiece nickel plating 20 minutes once more, take out, put into aforementioned distilled water solution once more with strong current flushing 2 minutes, 5. workpiece nickel plating 20 minutes again plate 4 times so repeatedly, taking-up is also used flushing with clean water, and it is higher to obtain the coating density, the uniform nickel-phosphorus alloy coating that solidity to corrosion is more excellent.
The coating of gained and ordinary method gained coating are carried out the solidity to corrosion comparative experiments in the 5%Nacl aqueous solution prove, under the same conditions, the time that first hot spot occurs with ordinary method gained coating is after the plating the 10th day, and the time that first hot spot appears in this routine gained coating is after the plating the 18th day.
Three, setting used plating bath is 12 μ m/h, and the volume of desire plating workpiece is 30cm
2Thickness of coating requires 12 μ m, 1. compound concentration is the 2g/L polyoxyethylene glycol, water-soluble 1 liter of the distillation of 10g/L trisodium citrate, put into water-bath and heat up up to boiling, be cooled to 70 ℃ then, 2. workpiece is through sand papering, alkaline degreasing, behind the clear water cleaning down, pickling is 30 seconds in 15% hydrochloric acid, through the clear water cleaning down, in 1.5% hydrochloric acid, activate 30 seconds more then, through the distillation washing, 3. workpiece is put into immediately and specified the plating bath chemical nickel plating to take out after 15 minutes, put into aforementioned distilled water solution with strong current flushing 2 minutes, soaked 2 minutes, 4. workpiece nickel plating 15 minutes once more, take out, put into aforementioned distilled water solution once more with strong current flushing 2 minutes, 5. workpiece nickel plating 15 minutes again plate 4 times so repeatedly, taking-up is also used flushing with clean water, and it is higher to obtain the coating density, the uniform nickel-phosphorus alloy coating that solidity to corrosion is more excellent.
The coating of gained and ordinary method gained coating are carried out the solidity to corrosion comparative experiments in the 5%Nacl aqueous solution prove, under the same conditions, the time that first hot spot occurs with ordinary method gained coating is after the plating the 10th day, and the time that first hot spot appears in this routine gained coating is after the plating the 15th day.
The present invention has substantive distinguishing features and marked improvement, and its method is simple, adopts discontinuity to remove coating The technology that the Surface Hydrogen stagnation of the circulation of vital energy is stayed cooperates rational break time, draws that density is higher, corrosion resistance is more excellent Uniform nickel-phosphorus alloy coating, especially be used in high speed chemical nickel plating aspect, its superiority is more bright Aobvious.
Claims (2)
1, the chemical Ni-P plating process of a kind of high-compactness and high anti-corrosion, it is characterized in that concrete technology is as follows: 1. preparation contains the deoxidation distilled water solution of wetting agent and network and agent, the wetting agent that uses in the deoxidation distilled water solution, complexing agent is polyoxyethylene glycol and/or trisodium citrate, 2. solution is warming up to 40-70 ℃, 3. specify under electroless plating prescription and the processing condition the workpiece plating, it is fixed that the length of plating time is come according to plating speed, 4. after plating for some time, take out workpiece and put into deoxidation distilled water solution, 5. repeat workpiece plating and dehydrogenation process its surface removal hydrogen.
2, the chemical Ni-P plating process of described this high-compactness of claim 1 and high anti-corrosion, its feature also are to plate speed can select high plating speed or low plating speed for use, high plating speed promptly:＞25 μ m/h got 5-10 minute, low plating speed promptly: 6-12 μ m/h got 15-30 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01112669 CN1128248C (en) | 2001-04-19 | 2001-04-19 | Chemical Ni-P plating process with high compactedness and high corrosion resitance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01112669 CN1128248C (en) | 2001-04-19 | 2001-04-19 | Chemical Ni-P plating process with high compactedness and high corrosion resitance |
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| Publication Number | Publication Date |
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| CN1323918A true CN1323918A (en) | 2001-11-28 |
| CN1128248C CN1128248C (en) | 2003-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01112669 Expired - Fee Related CN1128248C (en) | 2001-04-19 | 2001-04-19 | Chemical Ni-P plating process with high compactedness and high corrosion resitance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014681A (en) * | 2012-12-12 | 2013-04-03 | 西安科技大学 | Preparation method of Ni-P alloy gradient coating |
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2001
- 2001-04-19 CN CN 01112669 patent/CN1128248C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014681A (en) * | 2012-12-12 | 2013-04-03 | 西安科技大学 | Preparation method of Ni-P alloy gradient coating |
| CN103014681B (en) * | 2012-12-12 | 2014-08-13 | 西安科技大学 | Preparation method of Ni-P alloy gradient coating |
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| CN1128248C (en) | 2003-11-19 |
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