CN101634041B - Method and solution for electrogalvanizing surface of zinc alloy workpiece comprising blind hole - Google Patents
Method and solution for electrogalvanizing surface of zinc alloy workpiece comprising blind hole Download PDFInfo
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- CN101634041B CN101634041B CN2008101200090A CN200810120009A CN101634041B CN 101634041 B CN101634041 B CN 101634041B CN 2008101200090 A CN2008101200090 A CN 2008101200090A CN 200810120009 A CN200810120009 A CN 200810120009A CN 101634041 B CN101634041 B CN 101634041B
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Abstract
The invention discloses a method and solution for electrogalvanizing the surface of a zinc alloy workpiece comprising a blind hole. The method orderly comprises the steps of cleaning, activating, electrogalvanizing, reactivating and passivating the surface of the zinc alloy workpiece. The electrogalvanizing solution is characterized in that: the solution contains the following components per liter: 0.5 to 2 g of acridine, 0.05 to 0.2 g of dioctyl sodium sulfosuccinate, and the balance of common acidic galvanizing components. The electrogalvanizing solution adjusts the pH value to between 5.0 and 6.0 when the electrogalvanizing is performed, the temperature of the solution is kept between 20 and 30 DEG C, and the cathode current density is between 1 and 3 A/dm<3>. The method and the solution have the advantages that: the electrogalvanizing solution has little corrosion to the matrix of a zinc alloy after a corrosion inhibitor is added; and the throwing power of the blind hole is high after a wetting agent is added into the electrogalvanizing solution; a finally obtained electrogalvanized layer has good binding force, good the throwing power, and good compactness and corrosion resistance; and the efficiency is improved.
Description
Technical field
The present invention relates to a kind of solution and method of electrogalvanizing surface of zinc alloy workpiece comprising blind hole, belong to the material surface process field.
Background technology
Because zinc alloy low price, fusing point are low, particularly the extrusion process performance is good, has been widely used in to make hardware accessory etc.The zinc alloy workpiece that has contains undersized blind hole, needs the long period in treating processes, and needs to add some wetting agents in treating processes.And the zinc alloy diecasting appearance is greyish white, and there are various defectives on the surface, as: lime-ash, shrinkage cavity etc., so under not surface treated situation, its usability and ornamental non-constant.Common surface treatment method is to electroplate.But zinc alloy is relatively more active comparatively speaking, and corrosion-resistant in acidic solution, such as in electroplating process, because electroplating time is longer, needs to add some inhibiter especially, and the excessive erosion of prevention zinc alloy reduces the cost, and raises the efficiency.
Number of patent application is that 200610151222.9 Chinese patent " a kind of method of direct copper non-cyanide plating of zinc alloy casting die " discloses a kind of zinc alloy diecasting electro-plating method, the organic acid-wash activation of a. catholyte oil removing → b. → c. organic acid dipping → d. Direct Electroplating copper; The composition and the processing condition of the solution of described " d. Direct Electroplating copper " are: bivalent cupric ion concentration 10～25g/L, complexing agent 120～350g/L, salt of wormwood 10～50g/L, hydrogen peroxide 1～15mL/L, the pH value remains between 9～12, use 50% potassium hydroxide solution adjusting pH value, cathode current density D
k=0.5～2.5A/dm
2, 20～50 ℃ of temperature, this invention both can be used for the directly pre-copper facing of zinc alloy diecasting, also can be used for the copper electroplating layer thickening, and its defective is do not have wetting agent and inhibiter, is not suitable for electro-galvanizing on surface of zinc alloy workpiece comprising blind hole.
Comprehensively above-mentioned, require further improvement.
Summary of the invention
Primary technical problem to be solved by this invention provides a kind of method of electrogalvanizing surface of zinc alloy workpiece comprising blind hole, and it reduces electroplate liquid effectively to zinc alloy matrix corrosion, and blind hole to plate performance deeply good, coating is also fine and close, solidity to corrosion is good, improved efficient.
Another technical problem to be solved by this invention provides a kind of solution of electrogalvanizing surface of zinc alloy workpiece comprising blind hole, it reduces electroplate liquid effectively the zinc alloy matrix is corroded, and blind hole to plate performance deeply good, coating is also fine and close, solidity to corrosion is good, improved efficient.
The present invention solves the technical scheme that above-mentioned primary technical problem adopts: a kind of method of electrogalvanizing surface of zinc alloy workpiece comprising blind hole, it includes surface of zinc alloy workpiece cleaning, activation, plating, clear Xian, reactivate, passivation step successively, it is characterized in that containing in the electro-galvanizing solution acridine 0.5～2g/l, Aerosol OT 0.05～0.2g/l, all the other are common acid zinc plating composition.
The present invention solves the technical scheme that above-mentioned another technical problem adopts: a kind of solution of electrogalvanizing surface of zinc alloy workpiece comprising blind hole, it is characterized in that containing in the electro-galvanizing solution acridine 0.5～2g/l, Aerosol OT 0.05～0.2g/l, all the other are common acid zinc plating composition.
Described electro-galvanizing solution is adjusted into 5.0～6.0 with the pH value when electroplating, solution temperature remains on 20～30 ℃, and cathode current density is 1～3A/dm
3After oil removing, cleaning, put into the plating bath plating containing the blind hole zinc alloy workpiece.
Zinc accounts for 60%～90% of massfraction in the described zinc alloy workpiece, and all the other compositions are aluminium or copper.
The deionized water ultrasonic cleaning is then used in described cleaning.
Compared with prior art, the invention has the advantages that: the zinc-plated prescription that does not add Aerosol OT, dark in the blind hole inwall of 6mm just can't plate, the electro-galvanizing solution that contains Aerosol OT 0.05～0.2g/l then still can plate for the blind hole inwall of 30mm.Do not add acridine in the plating bath, gained coating has the corrosion aperture, and after having added 0.5～2g/l acridine in the plating bath, it is complete to obtain coating, and bonding force is good.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail.
A kind ofly contain small-sized blind hole zinc alloy surface treatment process, it mainly may further comprise the steps successively:
Alkali Xian, water Xian, sour Xian, water Xian, activation, plating, water Xian, reactivate, passivation, hot water Xian, cold wash, add inhibiter acridine 0.5～2g/L, Aerosol OT 0.05～0.2g/L therein in the acid chloride electro-galvanizing solution, the invention has the advantages that: plating bath is little to the corrosion of zinc alloy matrix after adding inhibiter, blind hole is plated performance deeply after adding wetting agent, the galvanized layer combining capacity that finally obtains is good, plating property is good deeply, and coating is also fine and close, solidity to corrosion is good, improved efficient.
The deionized water ultrasonic cleaning is then used in described cleaning.
Specific embodiment 1
With massfraction is that 60% zinc alloy is as matrix.Acid chloride electro-galvanizing solution is: zinc chloride 70g/L, Repone K 200g/L, boric acid 30g/L, acridine 2g/L, Aerosol OT 0.05g/L, brightening agent provides ZINC ACK series for Hangzhou wild Scientific and Technical Industry Co., Ltd difficult to understand, wherein brightening agent ACK-130ml/L, ACK-22ml/L, 30 ℃ of solution temperatures, cathode current density 3A/dm
2, pH value=5.3, electroplating time 50min.The coating compactness of gained is good, plating property is good deeply, glossiness is fine and corrosion resistance nature might as well.Under the identical situation of other compositions,
Embodiment 2
With massfraction is that 70% zinc alloy is as matrix. acid chloride electro-galvanizing solution is: zinc chloride 70g/L, Repone K 200g/L, boric acid 30g/L, acridine 1.5g/L, Aerosol OT 0.1g/L, brightening agent provides ZINC ACK series for Hangzhou wild Scientific and Technical Industry Co., Ltd difficult to understand, wherein brightening agent ACK-130ml/L, ACK-22ml/L, 30 ℃ of solution temperatures, cathode current density 3A/dm
2, pH value=5.3, electroplating time 45min.The coating compactness of gained is good, plating property is good deeply, glossiness is fine and corrosion resistance nature might as well.
Embodiment 3
Be that 80% zinc alloy is: zinc chloride 70g/L with massfraction as matrix acid chloride electro-galvanizing solution, Repone K 2000g/L, boric acid 30g/L, acridine 1g/L, Aerosol OT 0.15g/L, brightening agent provides ZINCACK series for Hangzhou wild Scientific and Technical Industry Co., Ltd difficult to understand, wherein brightening agent ACK-130ml/L, ACK-22ml/L, 30 ℃ of solution temperatures, cathode current density 3A/dm
2, pH value=5.3, electroplating time 40min.The coating compactness of gained is good, plating property is good deeply, glossiness is fine and corrosion resistance nature might as well.
Embodiment 4
Be that 90% zinc alloy is: zinc chloride 70g/L with massfraction as matrix acid chloride electro-galvanizing solution, Repone K 2000g/L, boric acid 30g/L, acridine 0.5g/L, Aerosol OT 0.2g/L, brightening agent provides ZINC ACK series for Hangzhou wild Scientific and Technical Industry Co., Ltd difficult to understand, wherein brightening agent ACK-130ml/L, ACK-22ml/L, 30 ℃ of solution temperatures, cathode current density 3A/dm
3, pH value=5.3, electroplating time 30min.The coating compactness of gained is good, plating property is good deeply, glossiness is fine and corrosion resistance nature might as well.
In a word, because zinc alloy is relatively more active and workpiece contains blind hole, add some inhibiter and wetting agent in electroplating solution, it is the main component of plating bath with zinc chloride, Repone K, boric acid, and acridine is an inhibiter, and Aerosol OT is a wetting agent.Using method: required acridine is put into fully stirring and dissolving of small quantity of deionized water; Aerosol OT joins in the small amount of deionized water and fully stirs; Be added to together behind both remix and fully stir 4～6min in the plating bath again, electroplate passivation more afterwards, can obtain the good and corrosion resistant zinc coating of bonding force putting into plating bath through oil removing, rust cleaning, activatory zinc alloy matrix.
Claims (2)
1. the method for an electrogalvanizing surface of zinc alloy workpiece comprising blind hole, it includes surface of zinc alloy workpiece cleaning, activation, plating, clear Xian, reactivate, passivation step successively, it is characterized in that containing in the electro-galvanizing solution acridine 0.5～2g/L, Aerosol OT 0.05～0.2g/L, all the other are acid chloride electro-galvanizing solution;
Described electro-galvanizing solution is adjusted into 5.0～6.0 with the pH value when electroplating, solution temperature remains on 20～30 ℃, and cathode current density is 1～3A/dm
2
Zinc accounts for 60%～90% of massfraction in the described zinc alloy workpiece, and all the other compositions are aluminium or copper.
2. the solution of an electrogalvanizing surface of zinc alloy workpiece comprising blind hole is characterized in that containing in the electro-galvanizing solution acridine 0.5～2g/L, Aerosol OT 0.05～0.2g/L, and all the other are acid chloride electro-galvanizing solution;
Described electro-galvanizing solution is adjusted into 5.0～6.0 with the pH value when electroplating, solution temperature remains on 20～30 ℃, and cathode current density is 1～3A/dm
2
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| CN2008101200090A CN101634041B (en) | 2008-07-21 | 2008-07-21 | Method and solution for electrogalvanizing surface of zinc alloy workpiece comprising blind hole |
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| CN2008101200090A CN101634041B (en) | 2008-07-21 | 2008-07-21 | Method and solution for electrogalvanizing surface of zinc alloy workpiece comprising blind hole |
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| CN101634041A CN101634041A (en) | 2010-01-27 |
| CN101634041B true CN101634041B (en) | 2011-05-18 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560567B (en) * | 2012-01-19 | 2015-03-11 | 朱育盼 | Method for electrogalvanizing on surface of zinc alloy workpiece with blind holes |
| CN102534699B (en) * | 2012-01-19 | 2015-01-28 | 张颖 | Electroplating solution for surface of zinc alloy workpiece with blind hole |
| CN103924268B (en) * | 2013-12-26 | 2016-04-13 | 苏州昕皓新材料科技有限公司 | A kind of application of sour copper leveling agent |
| CN103924269B (en) * | 2013-12-26 | 2016-04-13 | 苏州昕皓新材料科技有限公司 | The application of a kind of non-dyestuff system leveling agent |
| CN115125590B (en) * | 2022-08-08 | 2024-02-06 | 辛集市澳森金属制品有限公司 | Corrosion-resistant electroplated galvanized wire and processing technology thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5578187A (en) * | 1995-10-19 | 1996-11-26 | Enthone-Omi, Inc. | Plating process for electroless nickel on zinc die castings |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5578187A (en) * | 1995-10-19 | 1996-11-26 | Enthone-Omi, Inc. | Plating process for electroless nickel on zinc die castings |
Non-Patent Citations (3)
| Title |
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| 匡海文.锌合金压铸件无氰镀锌.《电镀与精饰》.1990,第12卷(第5期), * |
| 张立茗等.实用电镀添加剂.《实用电镀添加剂》.张立茗等,2001, * |
| 鞠虹等.金属锌、铝的缓蚀剂研究进展.《腐蚀科学与防护技术》.2006,第18卷(第5期), * |
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