CN104294243B - A kind of aluminum pipe nickel plating process - Google Patents
A kind of aluminum pipe nickel plating process Download PDFInfo
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- CN104294243B CN104294243B CN201410555154.7A CN201410555154A CN104294243B CN 104294243 B CN104294243 B CN 104294243B CN 201410555154 A CN201410555154 A CN 201410555154A CN 104294243 B CN104294243 B CN 104294243B
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- aluminum pipe
- alkaline solution
- nickel
- nickel plating
- nickeliferous
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
- C23C18/34—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
- C23C18/36—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents using hypophosphites
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- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemically Coating (AREA)
Abstract
The invention discloses a kind of aluminum pipe nickel plating process, comprise the following steps: cleaning before plating, alkaline solution decontamination, zinc-plated process and first nickel plating in an acidic solution after nickel plating in alkaline solution, then toast.Nickel can be plated on aluminum pipe matrix by the method for the present invention effectively, and nickel coating is firmly combined with aluminum pipe matrix, coating difficult drop-off.
Description
Technical field
The present invention relates to a kind of method in aluminum tube surfaces nickel plating.
Background technology
Aluminum pipe has and is widely applied very much in commercial production and life, aluminium plate and aluminum tube surfaces nickel plating can significantly improve its hardness, wearability and corrosion resistance, but also can give its surface other functional characteristics many, as easy weldability, can polishability etc., its application can be expanded further.
But aluminium belongs to chemical nickel plating Difficult to plate substrates, nickel process is the metallurgical process of a self-catalysis for its essence.The foul of material surface or defect all make the surface breakdown of matrix can not form the cover layer of activity, make aluminium can not obtain qualified nickel coating.Owing to aluminum is the active metal of a kind of comparison, in the plating solution easily and many kinds of metal ions generation displacement reaction, form loose coarse contact coating at aluminium material surface, have a strong impact on the bond strength between coating and matrix.It addition, aluminum belongs to amphoteric metal, all unstable in acid, aqueous slkali, cause the biggest difficulty to chemical nickel plating.And when ambient temperature changes, owing to aluminum substrate is different with the coefficient of expansion of nickel coating, easily produce internal stress and destroy coating, cause nickel coating to come off.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of aluminum pipe nickel plating process, and nickel can be plated on aluminum pipe matrix by the method effectively, and nickel coating is firmly combined with aluminum pipe matrix, coating difficult drop-off.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide a kind of aluminum pipe nickel plating process, and it comprises the following steps:
(1) cleaning before plating, the aluminum pipe treating nickel plating with organic solvent or alkaline solution is cleaned, and removes the dirty of aluminum tube surfaces, then with clear water wash clean aluminum pipe；
(2) aluminum pipe treating nickel plating after cleaning is immersed standing 30-120 minute in the alkaline solution containing zinc, including Zinc oxide powder, water, iron chloride powder and sodium hydroxide powder in the described alkaline solution containing zinc, described Zinc oxide powder, water, iron chloride powder and sodium hydroxide powder are mixed together uniformly；
(3) aluminum pipe after step (2) being completed is inserted and is carried out nickel preplating process in nickeliferous alkaline solution, described nickeliferous alkaline solution includes nickel sulfate, sodium hypophosphite, triethanolamine and ammonium chloride, the pH value of described nickeliferous alkaline solution is 9, and the time that nickel preplating processes is 3-10 minute, treatment temperature is 20-35 DEG C；
(4) the aluminum pipe clear water after step (3) being completed is carried out, and then inserts and carries out Nickel Plating Treatment in nickeliferous acid solution, includes nickel sulfate, water and sulphuric acid or hydrochloric acid in described nickeliferous acid solution, and the time of Nickel Plating Treatment is 2-10 minute；
(5) the aluminum pipe clear water after step (4) being completed is carried out, and then inserts in baking box and toasts, and improves the bond strength of nickel coating and aluminum pipe matrix.
In a preferred embodiment of the present invention, the mass percentage content in the described alkaline solution containing zinc of the Zinc oxide powder described in step (2) is 5%-12%, and the pH value of the described alkaline solution containing zinc is 8.
In a preferred embodiment of the present invention, the mass percentage content in described nickeliferous alkaline solution of nickel sulfate, sodium hypophosphite, triethanolamine and the ammonium chloride described in step (3) is respectively 2%, 5%, 1.5% and 3%.
In a preferred embodiment of the present invention, the mass percentage content in described nickeliferous acid solution of the nickel sulfate described in step (4) is 5%.
In a preferred embodiment of the present invention, the extraction time in step (3) is 1 ~ 3h.
In a preferred embodiment of the present invention, in step (5), the temperature of oven cooking cycle is 130-150 DEG C, and the time of baking is 1-1.5 hour.
Aluminum pipe after step (2) being completed is inserted in the alkaline solution of cupric and is carried out copper pre-plating process, and the thickness of the copper plate that described aluminum pipe is formed is 8-15 micron.
Including copper cyanider in the alkaline solution of described cupric, described copper cyanider mass percentage content in the alkaline solution of described cupric is 0.5%-1.5%.
The invention has the beneficial effects as follows: the processing arrangement that the method is passed through pre-clean processes, zinc-plated process and first nickel plating in an acidic solution after nickel plating in alkaline solution, then toasted, nickel can be plated to effectively on aluminum pipe matrix, nickel coating is firmly combined with aluminum pipe matrix, coating difficult drop-off.
Detailed description of the invention
Technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
Embodiments of the invention include:
(1) cleaning before plating, the aluminum pipe treating nickel plating with organic solvent or alkaline solution is cleaned, and removes the dirty of aluminum tube surfaces, then with clear water wash clean aluminum pipe；
(2) aluminum pipe treating nickel plating after cleaning is immersed standing 30-120 minute in the alkaline solution containing zinc, the described alkaline solution containing zinc includes Zinc oxide powder, water, iron chloride powder and sodium hydroxide powder, described Zinc oxide powder, water, iron chloride powder and sodium hydroxide powder are mixed together uniformly, described Zinc oxide powder mass percentage content in the described alkaline solution containing zinc is 5%-12%, preferably 8%；The pH value of the described alkaline solution containing zinc is 8；Formed the zinc coat of one layer of smooth even by this step on the surface of aluminum pipe, the binding strength of coating and aluminum pipe matrix can be increased.
(3) aluminum pipe after step (2) being completed is inserted and is carried out nickel preplating process in nickeliferous alkaline solution, described nickeliferous alkaline solution includes nickel sulfate, sodium hypophosphite, triethanolamine and ammonium chloride, the pH value of described nickeliferous alkaline solution is 9, the time that nickel preplating processes is 3-10 minute, it is preferably 5 minutes, treatment temperature is 20-35 DEG C, preferably 30 DEG C；Described nickel sulfate, sodium hypophosphite, triethanolamine and ammonium chloride mass percentage content in described nickeliferous alkaline solution is respectively 2%, 5%, 1.5% and 3%；First nickel plating in alkaline solution, is possible to prevent the most plated zinc coat to decompose in an acidic solution, after first plating one layer of nickel in alkaline solution next step in an acidic solution nickel plating time can increase the adhesion of coating, prepare for next step nickel plating.
(4) the aluminum pipe clear water after step (3) being completed is carried out, then insert and nickeliferous acid solution carries out Nickel Plating Treatment, described nickeliferous acid solution includes nickel sulfate, water and sulphuric acid or hydrochloric acid, the time of Nickel Plating Treatment is 2-10 minute, being preferably 5 minutes, described nickel sulfate mass percentage content in described nickeliferous acid solution is 5%；After completing this step, one layer of nickel coating before continues increase thickness of coating, aluminum pipe matrix has plated the nickel of abundance, and has been firmly combined with between coating.
(5) the aluminum pipe clear water after step (4) being completed is carried out, and then inserts in baking box and toasts, and improves the bond strength of nickel coating and aluminum pipe matrix；The temperature of oven cooking cycle is 140 DEG C, and the time of baking is 1.5 hours.The step for the hydrogen of absorption in coating when can remove nickel plating, and discharge stress present in coating, improve the bond strength of coating and matrix, nickel coating difficult drop-off.
Preferably, aluminum pipe is inserted after completing in the alkaline solution of cupric and is first carried out copper pre-plating process by step (2), and the thickness of the copper plate that described aluminum pipe is formed is 8-15 micron.Including copper cyanider in the alkaline solution of described cupric, described copper cyanider mass percentage content in the alkaline solution of described cupric is 0.5%-1.5%, and copper cyanider has good plating performance.Other similar copper-contained electroplating liquid with good plating performance can certainly be selected.
Copper plate can increase the affinity of nickel coating and aluminum pipe matrix, increases nickel coating adhesive force on aluminum pipe matrix, it is ensured that coating solid and reliable.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical field, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (4)
1. an aluminum pipe nickel plating process, it is characterised in that comprise the following steps:
(1) cleaning before plating, the aluminum pipe treating nickel plating with organic solvent or alkaline solution is cleaned, and removes the dirty of aluminum tube surfaces, then with clear water wash clean aluminum pipe；
(2) aluminum pipe treating nickel plating after cleaning is immersed standing 30-120 minute in the alkaline solution containing zinc, the described alkaline solution containing zinc includes Zinc oxide powder, water, iron chloride powder and sodium hydroxide powder, described Zinc oxide powder, water, iron chloride powder and sodium hydroxide powder are mixed together uniformly, described Zinc oxide powder mass percentage content in the described alkaline solution containing zinc is 5%-12%, the pH value of the described alkaline solution containing zinc is 8, after completing, aluminum pipe is inserted in the alkaline solution of cupric and carry out copper pre-plating process, the thickness of the copper plate formed on described aluminum pipe is 8-15 micron, the alkaline solution of described cupric includes copper cyanider, described copper cyanider mass percentage content in the alkaline solution of described cupric is 0.5%-1.5%；
(3) aluminum pipe after step (2) being completed is inserted and is carried out nickel preplating process in nickeliferous alkaline solution, described nickeliferous alkaline solution includes nickel sulfate, sodium hypophosphite, triethanolamine and ammonium chloride, the pH value of described nickeliferous alkaline solution is 9, the time that nickel preplating processes is 3-10 minute, treatment temperature is 20-35 DEG C, and described nickel sulfate, sodium hypophosphite, triethanolamine and ammonium chloride mass percentage content in described nickeliferous alkaline solution is respectively 2%, 5%, 1.5% and 3%；
(4) the aluminum pipe clear water after step (3) being completed is carried out, and then inserts and carries out Nickel Plating Treatment in nickeliferous acid solution, includes nickel sulfate, water and sulphuric acid or hydrochloric acid in described nickeliferous acid solution, and the time of Nickel Plating Treatment is 2-10 minute；
(5) the aluminum pipe clear water after step (4) being completed is carried out, and then inserts in baking box and toasts, and improves the bond strength of nickel coating and aluminum pipe matrix.
Aluminum pipe nickel plating process the most according to claim 1, it is characterised in that the mass percentage content in described nickeliferous acid solution of the nickel sulfate described in step (4) is 5%.
Aluminum pipe nickel plating process the most according to claim 1, it is characterised in that the time of the Nickel Plating Treatment in step (4) is 5 minutes.
Aluminum pipe nickel plating process the most according to claim 1, it is characterised in that in step (5), the temperature of oven cooking cycle is 130-150 DEG C, the time of baking is 1-1.5 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410555154.7A CN104294243B (en) | 2014-10-20 | 2014-10-20 | A kind of aluminum pipe nickel plating process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410555154.7A CN104294243B (en) | 2014-10-20 | 2014-10-20 | A kind of aluminum pipe nickel plating process |
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| Publication Number | Publication Date |
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| CN104294243A CN104294243A (en) | 2015-01-21 |
| CN104294243B true CN104294243B (en) | 2016-09-21 |
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| CN201410555154.7A Active CN104294243B (en) | 2014-10-20 | 2014-10-20 | A kind of aluminum pipe nickel plating process |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107177837A (en) * | 2017-05-17 | 2017-09-19 | 南通惠能镀镍钢带有限公司 | A kind of steel band chemical nickel-plating solution and its nickel plating process |
| CN110284127A (en) * | 2019-05-24 | 2019-09-27 | 北京卫星制造厂有限公司 | High-volume fractional silicon-carbide particle reinforced aluminium-base composite material coating and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005008968A (en) * | 2003-06-20 | 2005-01-13 | Fujikura Ltd | Electroless nickel-plating liquid |
| CN1847453A (en) * | 2006-05-12 | 2006-10-18 | 武士威 | Low temperature chemcial plating nickel solution |
| CN1955343A (en) * | 2005-10-24 | 2007-05-02 | 比亚迪股份有限公司 | Electroplating method of alluminium alloy surface |
| CN101624716A (en) * | 2008-07-08 | 2010-01-13 | 厦门华弘昌科技有限公司 | Method for pretreating aluminum tubes before electroplating |
| 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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2014
- 2014-10-20 CN CN201410555154.7A patent/CN104294243B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005008968A (en) * | 2003-06-20 | 2005-01-13 | Fujikura Ltd | Electroless nickel-plating liquid |
| CN1955343A (en) * | 2005-10-24 | 2007-05-02 | 比亚迪股份有限公司 | Electroplating method of alluminium alloy surface |
| CN1847453A (en) * | 2006-05-12 | 2006-10-18 | 武士威 | Low temperature chemcial plating nickel solution |
| CN101624716A (en) * | 2008-07-08 | 2010-01-13 | 厦门华弘昌科技有限公司 | Method for pretreating aluminum tubes before electroplating |
| 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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