CN111945195A - Electroplating method of low-hydrogen brittle alkaline zinc-nickel alloy for high-strength steel - Google Patents
Electroplating method of low-hydrogen brittle alkaline zinc-nickel alloy for high-strength steel Download PDFInfo
- Publication number
- CN111945195A CN111945195A CN202010823137.2A CN202010823137A CN111945195A CN 111945195 A CN111945195 A CN 111945195A CN 202010823137 A CN202010823137 A CN 202010823137A CN 111945195 A CN111945195 A CN 111945195A
- Authority
- CN
- China
- Prior art keywords
- electroplating
- zinc
- strength steel
- nickel alloy
- nickel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009713 electroplating Methods 0.000 title claims abstract description 51
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 35
- 239000010959 steel Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 33
- 229910000990 Ni alloy Inorganic materials 0.000 title claims abstract description 31
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 25
- 239000001257 hydrogen Substances 0.000 title claims abstract description 25
- 238000007747 plating Methods 0.000 claims abstract description 21
- 238000002161 passivation Methods 0.000 claims abstract description 17
- 238000005260 corrosion Methods 0.000 claims abstract description 12
- 230000007797 corrosion Effects 0.000 claims abstract description 12
- 239000008139 complexing agent Substances 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 238000001994 activation Methods 0.000 claims abstract description 5
- 238000006356 dehydrogenation reaction Methods 0.000 claims abstract description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 238000005530 etching Methods 0.000 claims description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 10
- 239000011651 chromium Substances 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- XSUMSESCSPMNPN-UHFFFAOYSA-N propane-1-sulfonate;pyridin-1-ium Chemical compound C1=CC=NC=C1.CCCS(O)(=O)=O XSUMSESCSPMNPN-UHFFFAOYSA-N 0.000 claims description 5
- HVOBSBRYQIYZNY-UHFFFAOYSA-N 2-[2-(2-aminoethylamino)ethylamino]ethanol Chemical compound NCCNCCNCCO HVOBSBRYQIYZNY-UHFFFAOYSA-N 0.000 claims description 4
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 4
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 4
- 239000012964 benzotriazole Substances 0.000 claims description 4
- RRIWRJBSCGCBID-UHFFFAOYSA-L nickel sulfate hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-]S([O-])(=O)=O RRIWRJBSCGCBID-UHFFFAOYSA-L 0.000 claims description 4
- 229940116202 nickel sulfate hexahydrate Drugs 0.000 claims description 4
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 claims description 4
- 239000001433 sodium tartrate Substances 0.000 claims description 4
- 229960002167 sodium tartrate Drugs 0.000 claims description 4
- 235000011004 sodium tartrates Nutrition 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 claims description 3
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- DLDJFQGPPSQZKI-UHFFFAOYSA-N but-2-yne-1,4-diol Chemical compound OCC#CCO DLDJFQGPPSQZKI-UHFFFAOYSA-N 0.000 claims description 3
- GVHCUJZTWMCYJM-UHFFFAOYSA-N chromium(3+);trinitrate;nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Cr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GVHCUJZTWMCYJM-UHFFFAOYSA-N 0.000 claims description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 150000002815 nickel Chemical class 0.000 claims description 3
- 229910001453 nickel ion Inorganic materials 0.000 claims description 3
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 claims description 3
- 229940039790 sodium oxalate Drugs 0.000 claims description 3
- LLNFGUHIXJVVGK-UHFFFAOYSA-N 1-(2-hydroxyethyl)-2h-pyridine-3-carboxylic acid Chemical compound OCCN1CC(C(O)=O)=CC=C1 LLNFGUHIXJVVGK-UHFFFAOYSA-N 0.000 claims description 2
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 2
- QGUAJWGNOXCYJF-UHFFFAOYSA-N cobalt dinitrate hexahydrate Chemical compound O.O.O.O.O.O.[Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O QGUAJWGNOXCYJF-UHFFFAOYSA-N 0.000 claims description 2
- 229940039748 oxalate Drugs 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000005282 brightening Methods 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 claims 2
- JEIZBHITXXBWHM-UHFFFAOYSA-N 2-(2-hydroxyethyl)pyridine-3-carboxylic acid Chemical compound OCCC1=NC=CC=C1C(O)=O JEIZBHITXXBWHM-UHFFFAOYSA-N 0.000 claims 1
- 229910001297 Zn alloy Inorganic materials 0.000 claims 1
- 230000003213 activating effect Effects 0.000 claims 1
- QNDQILQPPKQROV-UHFFFAOYSA-N dizinc Chemical compound [Zn]=[Zn] QNDQILQPPKQROV-UHFFFAOYSA-N 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 19
- 238000000576 coating method Methods 0.000 abstract description 19
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- RILZRCJGXSFXNE-UHFFFAOYSA-N 2-[4-(trifluoromethoxy)phenyl]ethanol Chemical compound OCCC1=CC=C(OC(F)(F)F)C=C1 RILZRCJGXSFXNE-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- GPHSGOLKGXTCGE-UHFFFAOYSA-N OCCC1=C(C(=O)O)C=CC=N1.C(#CCCO)O Chemical compound OCCC1=C(C(=O)O)C=CC=N1.C(#CCCO)O GPHSGOLKGXTCGE-UHFFFAOYSA-N 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- JPJBEORAVWZJKS-UHFFFAOYSA-N oxalic acid;propanedioic acid Chemical compound OC(=O)C(O)=O.OC(=O)CC(O)=O JPJBEORAVWZJKS-UHFFFAOYSA-N 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- 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
- C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
The invention provides a low-hydrogen embrittlement alkaline zinc-nickel alloy electroplating method for high-strength steel, which comprises the steps of a high-strength steel surface activation process, a plating solution preparation process, a zinc-nickel alloy electroplating process, a cleaning and dehydrogenation process, a passivation process and the like. According to the low-hydrogen-brittleness alkaline zinc-nickel alloy electroplating method for the high-strength steel, provided by the invention, the coating of the low-hydrogen-brittleness alkaline zinc-nickel alloy electroplating solution on the surface of the high-strength steel has good dispersibility by using the formula, the allowable temperature range in the electroplating process is enlarged, the allowable temperature width in electroplating exceeds 20 ℃, the manufacturability of electroplating operation is improved, the coating inclusion is reduced, the coating complexing agent is stable, and the corrosion resistance is improved.
Description
Technical Field
The invention belongs to the technical field of zinc-nickel alloy electroplating surface treatment, and particularly relates to a low-hydrogen-brittleness alkaline zinc-nickel alloy electroplating method for high-strength steel.
Background
The zinc-nickel alloy plating layer not only has excellent corrosion resistance, but also has good cost performance. Since the zinc-nickel alloy electroplating process is proposed and researched at the beginning of the 20 th century, various acidic and alkaline electroplating systems have appeared after decades of development, and the performance of a plating layer is greatly improved. Zinc-nickel alloys have been studied and used in many fields. However, most of the applications of the zinc-nickel alloy are mostly concentrated on common low-carbon steel and structural steel, the application on high-strength steel is very little, an acidic system is easy to have very strong hydrogen embrittlement sensitivity on a high-strength steel matrix, and hydrogen embrittlement fracture is easy to cause, so that the hydrogen embrittlement sensitivity can be reduced by selecting an alkaline system, the dispersion of a coating and the electroplating conditions of the coating are affected differently by the addition of different complexing agents and brighteners, the electroplating temperature range of the commonly used electroplating zinc-nickel alloy electroplating solution is small, impurities exist in the coating, and the stability of some electroplating solutions is not enough. These are problems in zinc-nickel alloy plating.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method suitable for low-hydrogen-brittleness alkaline electroplating of zinc-nickel alloy on the surface of high-strength steel, which comprises the steps of carrying out etching activation on the surface of the high-strength steel to improve the binding force of a coating, then carrying out electroplating in electroplating solution prepared by using main nickel salt, zinc oxide, a complexing agent, a brightener and the like on the surface of the high-strength steel, and passivating by using trivalent chromium after electroplating according to certain process parameters, wherein the corrosion resistance of the formed coating is greatly improved, other properties of the coating meet the requirements, and the low-hydrogen-brittleness environmental protection effect is achieved.
In order to solve the above problems, the specific technical scheme of the invention is as follows:
a method for electroplating low-hydrogen brittle alkaline zinc-nickel alloy on high-strength steel comprises the following steps:
1) the surface activation process of the high-strength steel comprises the following steps: and (3) weakly etching the surface of the steel for less than 10s by using a weak etching solution at room temperature, so as to prevent hydrogen absorption caused by transitional corrosion. The preparation amount of the weak etching solution is determined according to the size and the number of workpieces, and 1L of the weak etching solution is treated for 3-5dm2The surface of the workpiece is prepared into weak etching solution by adopting 3-8% (mass percent m/m) hydrochloric acid solution. The surface is slightly activated by selecting a hydrochloric acid solution with low concentration, the activation time is reduced as much as possible, and the hydrogen absorption phenomenon caused by overhigh hydrogen content in acid is prevented.
2) The preparation process of the plating solution comprises the following steps: the preparation is prepared from main nickel salt, zinc oxide, complexing agent and brightener according to a proportion. After mixing according to the proportion, the concentration of zinc ions is 5-12g/L, and the concentration of nickel ions is 0.5-1.6 g/L. The main components of the nickel main salt of the plating solution are nickel sulfate hexahydrate and N- (2-hydroxyethyl) diethylenetriamine. Wherein, 0.5 to 1g/L of nickel sulfate hexahydrate and 50 to 100g/L of N- (2-hydroxyethyl) diethylenetriamine. The main components of the complexing agent of the plating solution are diethylenetriamine and sodium tartrate. Wherein, 3 to 8g/L of diethylenetriamine and 0.1 to 0.3g/L of sodium tartrate. The brightener of the plating solution mainly comprises 1, 4-butynediol, N-hydroxyethyl nicotinic acid inner salt, benzotriazole and pyridinium propanesulfonate. Wherein, 0.5-1g/L, N g/L of 1, 4-butynediol-hydroxyethyl nicotinic acid inner salt, 0.01-0.05g/L of benzotriazole, 0.01-0.02g/L of pyridinium propanesulfonate and 0.2-0.8g/L of pyridinium propanesulfonate.
3) The zinc-nickel alloy electroplating process comprises the following steps: the low-hydrogen brittle alkaline electroplating zinc-nickel alloy on the surface of the activated high-strength steel in the step 1) is carried out under the following process parameters: the temperature is 20-40 ℃, and the current density is 0.5-4A/dm2The concentration of sodium hydroxide is 80-120g/l, and a nickel polar plate is used.
4) Cleaning and dehydrogenation processes: and 3) after the electroplating is finished, cleaning the electroplating surface by using flowing cold water, and then removing hydrogen from the high-strength steel part at a specified temperature and time according to the material strength.
5) And (3) passivation process: before passivation, the surface subjected to dehydrogenation in the step 4) is activated by using a sulfuric acid solution so as to ensure the quality of surface passivation. Passivating in trivalent chromium passivating solution for 40-60s, controlling the pH value at 1.0-2.0, and controlling the temperature: 60-70 ℃. And finishing the electroplating process after passivation. The trivalent chromium passivation solution mainly comprises chromium nitrate nonahydrate, sodium oxalate, malonic acid oxalate, maleic anhydride and fluoboric acid. Wherein the passivation solution comprises 70-90g/L of chromium nitrate nonahydrate, 10-30g/L of sodium oxalate, 20-40g/L of malonic oxalate, 5-15g/L of cobalt nitrate hexahydrate, 20-40g/L of maleic anhydride and 5-10ml/L of fluoroboric acid. The mixed passivation solution is preferably left to stand for 24 hours.
The invention has the advantages that:
according to the low-hydrogen-brittleness alkaline zinc-nickel alloy electroplating method for the high-strength steel, provided by the invention, the coating of the low-hydrogen-brittleness alkaline zinc-nickel alloy electroplating solution on the surface of the high-strength steel has good dispersibility by using the formula, the allowable temperature range in the electroplating process is enlarged, the allowable temperature width in electroplating exceeds 20 ℃, the manufacturability of electroplating operation is improved, the coating inclusion is reduced, the coating complexing agent is stable, and the corrosion resistance is improved.
The corrosion resistance of a zinc-nickel alloy plating layer obtained by the low-hydrogen embrittlement alkaline electroplating zinc-nickel alloy plating solution on the surface of the high-strength steel is higher than that of a hexavalent chromium plating layer by using trivalent chromium passivation, and the neutral salt spray corrosion resistance exceeds 4000 hours, which is 10 times of the evaluation index of the same type of plating layer. The hydrogen embrittlement sensitivity is low, and the influence of hydrogen embrittlement on high-strength steel is avoided. Meanwhile, the trivalent chromium is green and environment-friendly, and the pollution of hexavalent chromium is reduced.
The workpiece adopting the coating can be suitable for complex shapes, the electroplating capability of the deep hole is improved, and the coating exists in the deep hole with the diameter of more than 4 times.
Detailed Description
The invention is further illustrated by the following examples, which are not to be construed as limiting the invention thereto. The following provides specific materials and sources thereof used in embodiments of the present invention. However, it should be understood that these are exemplary only and not intended to limit the invention, and that materials of the same or similar type, quality, nature or function as the following reagents and instruments may be used in the practice of the invention. The experimental procedures used in the following examples are all conventional procedures unless otherwise specified. Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Examples
The electroplating method of the low-hydrogen brittle alkaline zinc-nickel alloy for the high-strength steel comprises the following steps:
1) the method is characterized in that aviation high-strength steel 30CrMnSiNi2A is selected, weak etching liquid is adopted to conduct weak etching on the surface of the steel at room temperature, the time is less than 10s, and hydrogen absorption caused by transitional corrosion is prevented.
2) The preparation is prepared from nickel main salt, zinc oxide, complexing agent and brightener in proportion. After mixing according to the proportion, the concentration of zinc ions is 8g/l, and the concentration of nickel ions is 1.0 g/l.
3) High strength steel surfaceThe low-hydrogen brittle alkaline zinc-nickel alloy plating is carried out under the following process parameters: the temperature is 35 ℃, and the current density is 2.5A/dm2The sodium hydroxide concentration was 90g/l, and a nickel plate was used.
4) After the electroplating is finished, cleaning the electroplated surface, and then removing hydrogen from the high-strength steel part at a specified temperature and time according to the material strength.
5) Passivating for 60s in trivalent chromium passivation solution, controlling the pH value to be 1.5, and controlling the temperature: at 60 ℃. And finishing the electroplating process after passivation.
According to the low-hydrogen-brittleness alkaline zinc-nickel alloy electroplating method for the high-strength steel, provided by the invention, the coating of the low-hydrogen-brittleness alkaline zinc-nickel alloy electroplating solution on the surface of the high-strength steel has good dispersibility by using the formula, the allowable temperature range in the electroplating process is enlarged, the allowable temperature width in electroplating exceeds 20 ℃, the manufacturability of electroplating operation is improved, the coating inclusion is reduced, the coating complexing agent is stable, and the corrosion resistance is improved.
The corrosion resistance of a zinc-nickel alloy plating layer obtained by the low-hydrogen embrittlement alkaline electroplating zinc-nickel alloy plating solution on the surface of the high-strength steel is higher than that of a hexavalent chromium plating layer by using trivalent chromium passivation, and the neutral salt spray corrosion resistance exceeds 4000 hours, which is 10 times of the evaluation index of the same type of plating layer. The hydrogen embrittlement sensitivity is low, and the influence of hydrogen embrittlement on high-strength steel is avoided. Meanwhile, the trivalent chromium is green and environment-friendly, and the pollution of hexavalent chromium is reduced.
The workpiece adopting the coating can be suitable for complex shapes, the electroplating capability of the deep hole is improved, and the coating exists in the deep hole with the diameter of more than 4 times.
The above description of exemplary embodiments has been presented only to illustrate the technical solution of the invention and is not intended to be exhaustive or to limit the invention to the precise form described. Obviously, many modifications and variations are possible in light of the above teaching to those skilled in the art. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to thereby enable others skilled in the art to understand, implement and utilize the invention in various exemplary embodiments and with various alternatives and modifications. It is intended that the scope of the invention be defined by the following claims and their equivalents.
Claims (1)
1. The electroplating method of the low-hydrogen-brittleness alkaline zinc-nickel alloy of the high-strength steel is characterized by comprising the following steps of:
1) the surface activation process of the high-strength steel comprises the following steps: weak etching is carried out on the surface of the steel by adopting weak etching solution at room temperature for less than 10s, so that hydrogen absorption caused by transitional corrosion is prevented; wherein 1L of weak etching solution is treated for 3-5dm2Preparing weak etching solution by adopting 3-8% (m/m) hydrochloric acid solution on the surface of the workpiece;
2) the preparation process of the plating solution comprises the following steps: the zinc-zinc alloy is prepared by mixing main nickel salt, zinc oxide, a complexing agent and a brightening agent according to a proportion, wherein the concentration of zinc ions is 5-12g/L, and the concentration of nickel ions is 0.5-1.6 g/L; the nickel main salt of the plating solution comprises nickel sulfate hexahydrate and N- (2-hydroxyethyl) diethylenetriamine, wherein the nickel sulfate hexahydrate is 0.5-1g/L, and the N- (2-hydroxyethyl) diethylenetriamine is 50-100 g/L; the complexing agent of the plating solution comprises diethylenetriamine and sodium tartrate, wherein the diethylenetriamine is 3-8g/L, and the sodium tartrate is 0.1-0.3 g/L; brightening agents of the plating solution comprise 1, 4-butynediol, N-hydroxyethyl nicotinic acid inner salt, benzotriazole and pyridinium propane sulfonate, wherein the 1, 4-butynediol accounts for 0.5-1g/L, N g, the hydroxyethyl nicotinic acid inner salt accounts for 0.01-0.05g/L, the benzotriazole accounts for 0.01-0.02g/L, and the pyridinium propane sulfonate accounts for 0.2-0.8 g/L;
3) the zinc-nickel alloy electroplating process comprises the following steps: the low-hydrogen brittle alkaline electroplating zinc-nickel alloy on the surface of the activated high-strength steel in the step 1) is carried out under the following process parameters: the temperature is 20-40 ℃, and the current density is 0.5-4A/dm2Using a nickel polar plate with the concentration of sodium hydroxide of 80-120 g/l;
4) cleaning and dehydrogenation processes: after the electroplating in the step 3) is finished, cleaning the electroplating surface by using flowing cold water, and then removing hydrogen from the high-strength steel part at a specified temperature and time according to the material strength;
5) and (3) passivation process: before passivation, activating the surface subjected to dehydrogenation in the step 4) by using a sulfuric acid solution so as to ensure the quality of surface passivation; passivating in trivalent chromium passivating solution for 40-60s, controlling the pH value at 1.0-2.0, and controlling the temperature: 60-70 ℃; and finishing the electroplating process after passivation, wherein the trivalent chromium passivation solution comprises 70-90g/L of chromium nitrate nonahydrate, 10-30g/L of sodium oxalate, 20-40g/L of malonic oxalate, 5-15g/L of cobalt nitrate hexahydrate, 20-40g/L of maleic anhydride and 5-10ml/L of fluoboric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010823137.2A CN111945195A (en) | 2020-08-17 | 2020-08-17 | Electroplating method of low-hydrogen brittle alkaline zinc-nickel alloy for high-strength steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010823137.2A CN111945195A (en) | 2020-08-17 | 2020-08-17 | Electroplating method of low-hydrogen brittle alkaline zinc-nickel alloy for high-strength steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111945195A true CN111945195A (en) | 2020-11-17 |
Family
ID=73341940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010823137.2A Pending CN111945195A (en) | 2020-08-17 | 2020-08-17 | Electroplating method of low-hydrogen brittle alkaline zinc-nickel alloy for high-strength steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111945195A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312238A (en) * | 2011-09-28 | 2012-01-11 | 中国计量学院 | Preparation of zinc nickel plating layer and trivalent chromium passivation process thereof |
| CN104005063A (en) * | 2014-06-11 | 2014-08-27 | 沈阳飞机工业（集团）有限公司 | Method for electroplating zinc and nickel alloy on steel work |
-
2020
- 2020-08-17 CN CN202010823137.2A patent/CN111945195A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312238A (en) * | 2011-09-28 | 2012-01-11 | 中国计量学院 | Preparation of zinc nickel plating layer and trivalent chromium passivation process thereof |
| CN104005063A (en) * | 2014-06-11 | 2014-08-27 | 沈阳飞机工业（集团）有限公司 | Method for electroplating zinc and nickel alloy on steel work |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106245071B (en) | Acid non-cyanide plating cadmium additive, plating solution prepares and electroplating technology | |
| CN105386089A (en) | Trivalent chromium hard chromium electroplating solution and application of trivalent chromium hard chromium electroplating solution in hard chromium electroplating | |
| CN102071415B (en) | Rare earth modified surface treating agent for copper and copper alloys and preparation method thereof | |
| CN109518237B (en) | Zinc-nickel-phosphorus electroplating solution, preparation method thereof and electroplating method | |
| CN102260891A (en) | Method for electrodepositing nanocrystalline nickel-cobalt alloy by double-pulse | |
| CN106756955A (en) | A kind of trivalent blue-white chromating concentrate of highly corrosion resistant and preparation method thereof | |
| CN111058068A (en) | Processing technology of zinc-plated nickel alloy | |
| CN111455419B (en) | Metal surface zinc-nickel alloy electroplating solution and electroplating process | |
| CN108315788B (en) | Stainless steel continuous electroplating nickel-phosphorus-boron alloy coiled plate and preparation method thereof | |
| CN102312238A (en) | Preparation of zinc nickel plating layer and trivalent chromium passivation process thereof | |
| CN104805480A (en) | Alkaline zinc-nickel electroplating liquid, preparation method and electroplating method | |
| CN101748449A (en) | Method for plating chromium by using trivalent chromium | |
| EP2350355B1 (en) | Zinc alloy electroplating baths and processes | |
| CN101781781A (en) | Method of pulse chromium plating with trivalent chromium | |
| CN111945195A (en) | Electroplating method of low-hydrogen brittle alkaline zinc-nickel alloy for high-strength steel | |
| CN112831808B (en) | Zinc-nickel alloy electroplating solution and application thereof in surface treatment of steel rail fastener | |
| CN104334770A (en) | Trivalent chromium-conversion processing solution containing aluminum-modified colloidal silica | |
| CN112626575A (en) | Surface electroplating liquid for alloy and electroplating process | |
| CN102383149B (en) | Environment-friendly trivalent chromium electroplating solution and environment-friendly trivalent chromium electroplating method | |
| CN102492967B (en) | Metal workpiece surface high-corrosion-resistance bright chromium plating technology | |
| CN208055478U (en) | The novel coating structure of non-cyanide plating cadmium on a kind of alloy matrix aluminum | |
| CN104120466A (en) | Weak acid chloride electroplating solution used for neodymium iron boron electroplating of zinc-iron alloy and preparation method | |
| CN110079842B (en) | Potassium chloride cadmium cobalt alloy plating solution, preparation method and electroplating process thereof | |
| CN111254466B (en) | Neodymium-iron-boron permanent magnet material surface galvanizing electroplating liquid and electroplating method thereof | |
| CN111270276A (en) | Flash galvanizing plating solution and preparation method thereof and flash galvanizing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201117 |