CN104419953A - Process for electroplating zinc-nickel alloy to surface of iron matrix - Google Patents
Process for electroplating zinc-nickel alloy to surface of iron matrix Download PDFInfo
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- CN104419953A CN104419953A CN201310397171.8A CN201310397171A CN104419953A CN 104419953 A CN104419953 A CN 104419953A CN 201310397171 A CN201310397171 A CN 201310397171A CN 104419953 A CN104419953 A CN 104419953A
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- Prior art keywords
- electroplating
- iron
- nickel alloy
- based surface
- electroplate liquid
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
Abstract
The invention discloses a process for electroplating a zinc-nickel alloy to a surface of an iron matrix. The process comprises the following steps: (1) preparing electroplating liquid according to the following formula: 150-210g/L of zinc chloride, 50-100g/L of nickel chloride hexahydrate, 40g/L of boric acid and 0.5g/L of sodium dodecyl sulfate; (2) adding the prepared electroplating liquid into an electroplating tank, adding a to-be-electroplated iron plate to the center of the electroplating tank to serve as a cathode, and adding two zinc plates into the electroplating tank to serve as anodes; (3) electroplating at the cathode current density of 10-20mA/cm<2>; and (4) taking out the iron plate when the thickness of an electroplating layer is 6-14 microns, so as to finish the electroplating. The process has the beneficial effects that ingredients for preparing the electroplating liquid are easily available, and the ingredients required in the electroplating do not easily volatilize during standing, so that the cost is saved; a zinc-nickel alloy layer produced by virtue of electroplating has flat and compact surface and bright appearance and colors, and the occurring probability of red rust is low.
Description
Technical field
The present invention relates to a kind of electroplating technology, specifically iron-based surface electroplated zinc nickel alloy technique.
Background technology
The crystalline structure of zn-ni alloy deposits, weldability, surfacial spalling and erosion resistance etc. are all better than zinc coating, its erosion resistance can reach 3 ~ 10 times of pure zinc coating, there is hydrogen embrittlement hardly, be applicable to use in severe industrial atmosphere and harsh ocean environment.The erosion resistance of iron-based surface is greatly increased at iron-based surface electroplated zinc nickel alloy coating, generally carry out in alkali plating solution when iron-based surface electroplated zinc nickel alloy now, employing ammoniacal liquor is complexing agent, when electroplate liquid does not use, ammoniacal liquor is volatile, ammoniacal liquor demand is large, this adds increased the cost at iron-based surface electroplated zinc nickel alloy coating.
Summary of the invention
The object of the invention is to solve now iron-based surface electroplated zinc nickel alloy adopt ammoniacal liquor as complexing agent because of ammoniacal liquor volatilization cause cost to increase problem, provide a kind of iron-based surface electroplated zinc nickel alloy technique, it is in acid condition at iron-based surface electroplated zinc nickel alloy layer, the composition that demand electroplated by electroplate liquid when standing is not volatile, thus can save the cost at iron-based surface electroplated zinc nickel alloy layer.
Object of the present invention is achieved through the following technical solutions: iron-based surface electroplated zinc nickel alloy technique, comprises the following steps:
Step one, by following recipe configuration electroplate liquid:
Zinc chloride 150 ~ 210g/L
Nickel dichloride hexahydrate 50 ~ 100g/L
Boric acid 40 g/L
Sodium laurylsulfonate 0.5 g/L;
Step 2, the electroplate liquid configured to be added in coating bath, and the iron plate that need electroplate adds coating bath central authorities as negative electrode, adds in coating bath two pieces of zine plates as anode;
Step 3, setting cathode current density are 10 ~ 20mA/cm
2electroplate;
Step 4, when coating is 6 ~ 14 μm, iron plate to be taken out, complete plating.Wherein, when the present invention applies, sodium laurylsulfonate has wetting effect to iron plate and zine plate, and the major ingredient of plating solution adopts distilled water configuration.
Further, also comprise in described step one and the pH value of electroplate liquid regulated and tests, make the pH value of electroplate liquid be 3.5 ~ 4.
Further, the area ratio adding iron plate and zine plate in described step 2 is 1:6.
In order to improve reaction efficiency, also comprising in described step 2 and heating regulation and control are carried out to the temperature of electroplate liquid in coating bath, making temperature of electroplating solution in it be in 45 ~ 55 DEG C.
Also comprise in described step 4 after the tool coated iron plate use water flushing of taking out and water are rinsed and adopt ethanol purge.So, on the iron-based body ensureing to have zinc-nickel alloy layer, electroless plating liquid causes corrosion to it.
Time too high as the iron plate current density of negative electrode in the present invention, negative electrode will separate out a large amount of hydrogen, cause current efficiency to decline, coating performance reduces; When current density is lower, will occur that zinc one nickel alloy coating deposition occurs abnormal.As preferably, the current density of the negative electrode set in described step 3 is 15mA/cm
2.
Compared with prior art, the present invention has following beneficial effect: comprise zinc chloride, Nickel dichloride hexahydrate, boric acid and sodium laurylsulfonate during electroplate liquid configuration of the present invention, demand electroplated by electroplate liquid composition when not using is not volatile, so, electroplate liquid can be avoided to volatilize the wasting of resources caused, and in the present invention, each component of electroplate liquid is all drawn materials convenient, and cost is low, so, the cost of iron-based surface electroplated zinc nickel alloy layer can be saved.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1
Iron-based surface electroplated zinc nickel alloy technique, comprise the following steps: step one, by following recipe configuration electroplate liquid: zinc chloride 150g/L, Nickel dichloride hexahydrate 50g/L, Boron acid 40g/L and sodium laurylsulfonate 0.5 g/L, the pH value of electroplate liquid regulated and tests, making the pH value of electroplate liquid be 3.5; Step 2, the electroplate liquid configured is added in coating bath, and the iron plate that need electroplate adds coating bath central authorities as negative electrode, two pieces of zine plates are added in coating bath as anode, the area ratio adding iron plate and zine plate is 1:6, heating regulation and control are carried out to the temperature of electroplate liquid in coating bath, makes temperature of electroplating solution in it be in 45 DEG C; Step 3, setting cathode current density are 10mA/cm
2electroplate; Step 4, when coating is 6 ~ 14 μm, iron plate to be taken out, the tool coated iron plate use water taken out is rinsed and water rinse after adopt ethanol purge, complete plating.
The present embodiment electroplating efficiency is high, X-ray diffraction method is adopted to measure the zinc-nickel alloy layer surfacing of iron-based surface fine and close, overall appearance color light, but have a little silver gray, adopt salt mist experiment to measure iron-based surface zinc-nickel alloy layer and occur that the probability of red rust is lower.
Embodiment 2
Iron-based surface electroplated zinc nickel alloy technique, comprise the following steps: step one, by following recipe configuration electroplate liquid: zinc chloride 150g/L, Nickel dichloride hexahydrate 100g/L, Boron acid 40g/L and sodium laurylsulfonate 0.5 g/L, the pH value of electroplate liquid regulated and tests, making the pH value of electroplate liquid be 4; Step 2, the electroplate liquid configured is added in coating bath, and the iron plate that need electroplate adds coating bath central authorities as negative electrode, two pieces of zine plates are added in coating bath as anode, the area ratio adding iron plate and zine plate is 1:6, heating regulation and control are carried out to the temperature of electroplate liquid in coating bath, makes temperature of electroplating solution in it be in 55 DEG C; Step 3, setting cathode current density are 10mA/cm
2electroplate; Step 4, when coating is 6 ~ 14 μm, iron plate to be taken out, the tool coated iron plate use water taken out is rinsed and water rinse after adopt ethanol purge, complete plating.
The present embodiment electroplating efficiency is high, adopts X-ray diffraction method to measure the zinc-nickel alloy layer surfacing of iron-based surface fine and close, appearance color light, adopts salt mist experiment to measure iron-based surface zinc-nickel alloy layer and occurs that the probability of red rust is lower.
Embodiment 3
Iron-based surface electroplated zinc nickel alloy technique, comprise the following steps: step one, by following recipe configuration electroplate liquid: zinc chloride 210g/L, Nickel dichloride hexahydrate 75g/L, Boron acid 40g/L and sodium laurylsulfonate 0.5 g/L, the pH value of electroplate liquid regulated and tests, making the pH value of electroplate liquid be 3.5; Step 2, the electroplate liquid configured is added in coating bath, and the iron plate that need electroplate adds coating bath central authorities as negative electrode, two pieces of zine plates are added in coating bath as anode, the area ratio adding iron plate and zine plate is 1:6, heating regulation and control are carried out to the temperature of electroplate liquid in coating bath, makes temperature of electroplating solution in it be in 50 DEG C; Step 3, setting cathode current density are 15mA/cm
2electroplate; Step 4, when coating is 6 ~ 14 μm, iron plate to be taken out, the tool coated iron plate use water taken out is rinsed and water rinse after adopt ethanol purge, complete plating.
The present embodiment electroplating efficiency is high, adopts X-ray diffraction method to measure the zinc-nickel alloy layer surfacing of iron-based surface fine and close, overall appearance color light, but has a little silver gray, adopts salt mist experiment to measure iron-based surface zinc-nickel alloy layer and occurs that the probability of red rust is lower.
Above content is the further description done the present invention in conjunction with concrete preferred implementation, can not assert that the specific embodiment of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, not departing from other embodiments drawn under technical scheme of the present invention, all should be included in protection scope of the present invention.
Claims (6)
1. iron-based surface electroplated zinc nickel alloy technique, is characterized in that, comprise the following steps:
Step one, by following recipe configuration electroplate liquid:
Zinc chloride 150 ~ 210g/L
Nickel dichloride hexahydrate 50 ~ 100g/L
Boric acid 40 g/L
Sodium laurylsulfonate 0.5 g/L;
Step 2, the electroplate liquid configured to be added in coating bath, and the iron plate that need electroplate adds coating bath central authorities as negative electrode, adds in coating bath two pieces of zine plates as anode;
Step 3, setting cathode current density are 10 ~ 20mA/cm
2electroplate;
Step 4, when coating is 6 ~ 14 μm, iron plate to be taken out, complete plating.
2. iron-based surface according to claim 1 electroplated zinc nickel alloy technique, is characterized in that, also comprises and to regulate the pH value of electroplate liquid and test, make the pH value of electroplate liquid be 3.5 ~ 4 in described step one.
3. iron-based surface according to claim 1 electroplated zinc nickel alloy technique, is characterized in that, the area ratio adding iron plate and zine plate in described step 2 is 1:6.
4. iron-based surface according to claim 1 electroplated zinc nickel alloy technique, is characterized in that, also comprises and carries out heating regulation and control to the temperature of electroplate liquid in coating bath, make temperature of electroplating solution in it be in 45 ~ 55 DEG C in described step 2.
5. iron-based surface according to claim 1 electroplated zinc nickel alloy technique, is characterized in that, also comprises after rinsing the tool coated iron plate use water flushing of taking out and water and adopt ethanol purge in described step 4.
6. according to the iron-based surface electroplated zinc nickel alloy technique in Claims 1 to 5 described in any one, it is characterized in that, the current density of the negative electrode set in described step 3 is 15mA/cm
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310397171.8A CN104419953A (en) | 2013-09-04 | 2013-09-04 | Process for electroplating zinc-nickel alloy to surface of iron matrix |
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|---|---|---|---|
| CN201310397171.8A CN104419953A (en) | 2013-09-04 | 2013-09-04 | Process for electroplating zinc-nickel alloy to surface of iron matrix |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112961A (en) * | 2015-09-22 | 2015-12-02 | 太仓市金鹿电镀有限公司 | Zinc-nickel alloy electroplating process |
| CN112593173A (en) * | 2020-12-03 | 2021-04-02 | 常州大学 | Silicon-containing steel hot dipping method capable of avoiding silicon reaction |
-
2013
- 2013-09-04 CN CN201310397171.8A patent/CN104419953A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112961A (en) * | 2015-09-22 | 2015-12-02 | 太仓市金鹿电镀有限公司 | Zinc-nickel alloy electroplating process |
| CN112593173A (en) * | 2020-12-03 | 2021-04-02 | 常州大学 | Silicon-containing steel hot dipping method capable of avoiding silicon reaction |
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Application publication date: 20150318 |