CN115522240A - Pulse nickel fog plating process - Google Patents
Pulse nickel fog plating process Download PDFInfo
- Publication number
- CN115522240A CN115522240A CN202211343409.4A CN202211343409A CN115522240A CN 115522240 A CN115522240 A CN 115522240A CN 202211343409 A CN202211343409 A CN 202211343409A CN 115522240 A CN115522240 A CN 115522240A
- Authority
- CN
- China
- Prior art keywords
- nickel
- concentration
- electroplating solution
- electroplating
- pulse
- 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
Classifications
-
- 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
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
- C25D5/14—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
-
- 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
- C25D5/18—Electroplating using modulated, pulsed or reversing current
-
- 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
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
-
- 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
-
- 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
- C25D5/50—After-treatment of electroplated surfaces by heat-treatment
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)
Abstract
The invention discloses a pulse fog nickel plating process, which is applied to rack plating or roll-to-roll continuous plating and comprises the following steps: s7, after cleaning, immersing the part into a storage tank filled with an electroplating solution, wherein the electroplating solution comprises nickel sulfate heptahydrate with the concentration of 250 to 350g/L, nickel chloride hexahydrate with the concentration of 30 to 50g/L, boric acid with the concentration of 30 to 40g/L and sodium dodecyl sulfate with the concentration of 0.05 to 0.1g/L, the pH of the electroplating solution is 3 to 5 to 4.5, the temperature of the electroplating solution is 50 to 60 ℃, pulse parameters of a control current comprise a forward/reverse current density ratio of 1; s8, after the electroplating is finished, washing off electroplating liquid attached to the surface of the part by using clear water by workers to clean the part for the fourth time. The invention has the beneficial effects that: can be suitable for electroplating parts and improving the electroplating quality of the parts.
Description
Technical Field
The invention relates to the technical field of nickel fog electroplating on parts, in particular to a pulse nickel fog plating process.
Background
After the part is punched and formed by a die, a layer of nickel fog is required to be plated on the outer surface of the part in the process, and the part is required to be matte white and adjustable in glossiness after the nickel fog is plated. The existing nickel fog plating process has 2 kinds, namely a pearl nickel plating process and a dark nickel plating process. The pearl nickel layer on the part has the characteristics of silk-satin appearance, dull white color, good decoration and wider adjustable range of glossiness. And the other part is electroplated by a dark nickel plating process, wherein a dark nickel layer on the part has dull and grey-white appearance, but the appearance decoration is poor, and the glossiness adjustment range is small. Therefore, the pearl nickel plating process is more suitable for plating the pearl nickel layer on the part.
The method comprises the following specific process steps of plating pearl nickel on the outer surface of the part: the method comprises the steps of base material removing, washing, activating, washing, nickel preplating, washing, pearl nickel plating, washing, drying and drying, wherein after drying, a pearl nickel layer can be plated on a part, so that the part is matte white in color and adjustable in glossiness. However, although this electroplating process can be applied to electroplating of parts, the following technical drawbacks still exist: I. the pearl nickel layer has large porosity, the surface of the plating layer is not compact, the conductivity is low, and the quality of parts is further reduced. II. The electroplating solution adopted by the process often generates impurities in the using process, so that the periodic maintenance treatment is needed, and the electroplating period is increased. Therefore, a pulse nickel-fog plating process suitable for electroplating parts and improving the electroplating quality of the parts is needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a pulse nickel fog plating process which is suitable for electroplating parts and improving the electroplating quality of the parts.
The purpose of the invention is realized by the following technical scheme: a pulse nickel fog plating process is applied to rack plating or roll-to-roll continuous plating and comprises the following steps:
s1, deoiling: removing oil stains on the surface of the part by adopting an electrolytic oil removal process, wherein the oil removal time is 3 to 5min;
s2, after oil removal, taking out the oil-removed part, and washing off oil stains attached to the surface of the part by using clean water so as to realize first cleaning of the part;
s3, hydrochloric acid activation: immersing the deoiled part into a groove body filled with an activation liquid, wherein the concentration of the activation liquid is 10-20%;
s4, after activation, taking out the activated part, and washing away the activating liquid attached to the surface of the part by using clean water to realize secondary cleaning of the part;
s5, nickel preplating: immersing the cleaned part into a tank body containing a nickel pre-plating solution, and electrifying for a period of time to electroplate a nickel pre-plating layer on the surface of the part;
s6, after nickel is preplated, washing away the nickel preplating solution attached to the surface of the part by using clean water so as to realize the third washing of the part;
s7, after cleaning, immersing the part into a storage tank containing an electroplating solution, wherein the electroplating solution comprises nickel sulfate heptahydrate with the concentration of 250-350g/L, nickel chloride hexahydrate with the concentration of 30-50g/L, boric acid with the concentration of 30-40g/L and sodium dodecyl sulfate with the concentration of 0.05-0.1g/L, the pH of the electroplating solution is 3.5-4.5, the temperature of the electroplating solution is 50-60 ℃, pulse parameters of a control current comprise a forward/reverse current density ratio of 1;
s8, after the electroplating is finished, washing off the electroplating solution attached to the surface of the part by workers with clear water to realize fourth cleaning of the part;
and S9, after cleaning, putting the parts into an oven, and drying the parts by controlling the temperature in the oven so as to finally obtain the parts.
In the step S1, the soaking time is 30min.
The nickel preplating solution in the step S5 is a hydrochloric acid + nickel chloride system.
The concentration of the activating solution is 8%.
The electroplating solution comprises 250g/L nickel sulfate heptahydrate, 30g/L nickel chloride hexahydrate, 30g/L boric acid and 0.05g/L sodium dodecyl sulfate, the pH value of the electroplating solution is 5, and the temperature of the electroplating solution is 45 ℃.
The electroplating solution comprises nickel sulfate heptahydrate with the concentration of 300g/L, nickel chloride hexahydrate with the concentration of 50g/L, boric acid with the concentration of 40g/L and sodium dodecyl sulfate with the concentration of 0.1g/L, the pH value of the electroplating solution is 5, and the temperature of the electroplating solution is 60 ℃.
The invention has the following advantages:
the electroplating solution adopted by the invention comprises nickel sulfate heptahydrate with the concentration of 250-300g/L, nickel chloride hexahydrate with the concentration of 30-50g/L, boric acid with the concentration of 30-40g/L and sodium dodecyl sulfate with the concentration of 0.05-0.1g/L, the pH of the electroplating solution is 3-5, the temperature of the electroplating solution is 45-60 ℃, the adopted pulse parameters comprise that the forward/reverse current density ratio is 1.
The invention adopts the electroplating solution and the pulse parameters, and the result obtained by detecting the nickel layer on the part is as follows: the porosity of the nickel layer is reduced, the plating layer is brighter, the surface of the plating layer is more uniform and compact, the conductivity is high, the density and the hardness of the plating layer are increased, the ductility and the wear resistance are improved, the hydrogen brittleness is eliminated, the dispersing capacity of the plating layer is improved, and the like, and the technical problem of the existing pearl nickel plating is solved.
Detailed Description
The present invention is further described below, and the scope of protection of the present invention is not limited to the following:
the first embodiment is as follows: a pulse nickel fog plating process is applied to rack plating or roll-to-roll continuous plating and comprises the following steps:
s1, deoiling: removing oil stains on the surfaces of the parts by adopting an electrolytic oil removal process, wherein the oil removal time is 3min;
s2, after oil removal, taking out the oil-removed part, and washing off oil stains attached to the surface of the part by using clean water so as to realize first cleaning of the part;
s3, hydrochloric acid activation: immersing the deoiled part into a groove body filled with an activating solution, wherein the concentration of the activating solution is 10%;
s4, after activation, taking out the activated part, and washing away the activating liquid attached to the surface of the part by using clean water to realize secondary cleaning of the part;
s5, nickel preplating: immersing the cleaned part into a tank containing nickel preplating solution, wherein the nickel preplating solution is a hydrochloric acid + nickel chloride system, and electroplating a nickel preplating layer on the surface of the part after electrifying for a period of time;
s6, after nickel pre-plating, washing away the nickel pre-plating solution attached to the surface of the part by using clean water to realize third cleaning of the part;
s7, after cleaning, immersing the part into a storage tank filled with electroplating solution, wherein the electroplating solution comprises nickel sulfate heptahydrate with the concentration of 250g/L, nickel chloride hexahydrate with the concentration of 30g/L, boric acid with the concentration of 30g/L and sodium dodecyl sulfate with the concentration of 0.05g/L, the pH of the electroplating solution is 3.5, the temperature of the electroplating solution is 50 ℃, pulse parameters of control current comprise a forward/reverse current density ratio of 1;
s8, after the electroplating is finished, washing off the electroplating solution attached to the surface of the part by workers with clear water to realize fourth cleaning of the part;
and S9, after cleaning, putting the parts into an oven, and drying the parts by controlling the temperature in the oven so as to finally obtain the parts.
From step S7, in the pulse plating process, the adopted plating solution includes nickel sulfate heptahydrate with a concentration of 250g/L, nickel chloride hexahydrate with a concentration of 30g/L, boric acid with a concentration of 30g/L, and sodium dodecyl sulfate with a concentration of 0.05g/L, the PH of the plating solution is 3.5, the temperature of the plating solution is 45 ℃, and the adopted pulse parameters include a forward/reverse current density ratio of 1.
Meanwhile, the pulse electroplating process adopts the electroplating solution and pulse parameters, and the result obtained by detecting the nickel layer on the part is as follows: the porosity of the nickel layer is reduced, the plating layer is brighter, the surface of the plating layer is more uniform and compact, the conductivity is high, the density and the hardness of the plating layer are increased, the ductility and the wear resistance are improved, the hydrogen brittleness is eliminated, the dispersion capacity of the plating layer is improved, and the like. Therefore, the pulse electroplating process solves the technical problems existing in the prior pearl nickel plating. In addition, the nickel sulfate heptahydrate, the nickel chloride hexahydrate, the boric acid and the sodium dodecyl sulfate do not generate precipitates or impurities in the using process, and regular maintenance treatment is not needed, so that the electroplating period is shortened.
Example two: a pulse nickel fog plating process comprises the following steps:
s1, deoiling: removing oil stain on the surface of the part by electrolytic oil removal process for 4min
S2, after oil removal, taking out the oil-removed part, and washing off oil stains attached to the surface of the part by using clean water so as to realize first cleaning of the part;
s3, hydrochloric acid activation: immersing the deoiled part into a tank body filled with an activating solution, wherein the concentration of the activating solution is 15%;
s4, after activation, taking out the activated part, and washing away the activating liquid attached to the surface of the part by using clean water to realize secondary cleaning of the part;
s5, nickel preplating: immersing the cleaned part into a tank body containing nickel preplating solution, and electroplating a layer of nickel preplating layer on the surface of the part after electrifying for a period of time;
s6, after nickel pre-plating, washing away the nickel pre-plating solution attached to the surface of the part by using clean water to realize third cleaning of the part;
s7, after cleaning, immersing the part into a storage tank containing electroplating solution, wherein the electroplating solution comprises nickel sulfate heptahydrate with the concentration of 300g/L, nickel chloride hexahydrate with the concentration of 40g/L, boric acid with the concentration of 35g/L and sodium dodecyl sulfate with the concentration of 0.07g/L, the PH of the electroplating solution is 4, the temperature of the electroplating solution is 55 ℃, pulse parameters of control current comprise a forward/reverse current density ratio of 1 to 25, a forward time of 35ms and a forward/reverse time ratio of 20, and after a period of time, a nickel layer with a matte white color and adjustable glossiness can be electroplated on the outer surface of the part;
s8, after the electroplating is finished, washing off the electroplating solution attached to the surface of the part by workers with clear water to realize fourth cleaning of the part;
and S9, after cleaning, putting the parts into an oven, and drying the parts by controlling the temperature in the oven so as to finally obtain the parts.
Example three: a pulse nickel fog plating process comprises the following steps:
s1, deoiling: removing oil stain on the surface of the part by electrolytic oil removal process for 5min
S2, after oil removal, taking out the oil-removed part, and washing off oil stains attached to the surface of the part by using clean water so as to realize first cleaning of the part;
s3, hydrochloric acid activation: immersing the deoiled part into a groove body filled with an activating solution, wherein the concentration of the activating solution is 20%;
s4, after activation, taking out the activated part, and washing away the activating liquid attached to the surface of the part by using clean water to realize secondary cleaning of the part;
s5, nickel preplating: immersing the cleaned part into a tank body containing a nickel pre-plating solution, and electrifying for a period of time to electroplate a nickel pre-plating layer on the surface of the part;
s6, after nickel is preplated, washing away the nickel preplating solution attached to the surface of the part by using clean water so as to realize the third washing of the part;
s7, after cleaning, immersing the part into a storage tank containing electroplating solution, wherein the electroplating solution comprises nickel sulfate heptahydrate with the concentration of 350g/L, nickel chloride hexahydrate with the concentration of 50g/L, boric acid with the concentration of 40g/L and sodium dodecyl sulfate with the concentration of 0.1g/L, the pH of the electroplating solution is 4.5, the temperature of the electroplating solution is 60 ℃, pulse parameters of control current comprise a forward/reverse current density ratio of 1;
s8, after the electroplating is finished, washing off the electroplating solution attached to the surface of the part by workers with clear water to realize fourth cleaning of the part;
and S9, after cleaning, putting the parts into an oven, and drying the parts by controlling the temperature in the oven so as to finally obtain the parts.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A pulse nickel fog plating process is applied to rack plating or roll-to-roll continuous plating and is characterized in that: it comprises the following steps:
s1, oil removal: removing oil stains on the surface of the part by adopting an electrolytic oil removal process, wherein the oil removal time is 3 to 5min;
s2, after oil removal, taking out the oil-removed part, and washing off oil stains attached to the surface of the part by using clean water so as to realize first cleaning of the part;
s3, hydrochloric acid activation: immersing the deoiled part into a groove body filled with an activation liquid, wherein the concentration of the activation liquid is 10-20%;
s4, after activation, taking out the activated part, and washing away the activating liquid attached to the surface of the part by using clean water to realize secondary cleaning of the part;
s5, nickel preplating: immersing the cleaned part into a tank body containing a nickel pre-plating solution, and electrifying for a period of time to electroplate a nickel pre-plating layer on the surface of the part;
s6, after nickel is preplated, washing away the nickel preplating solution attached to the surface of the part by using clean water so as to realize the third washing of the part;
s7, after cleaning, immersing the part into a storage tank containing an electroplating solution, wherein the electroplating solution comprises nickel sulfate heptahydrate with the concentration of 250-350g/L, nickel chloride hexahydrate with the concentration of 30-50g/L, boric acid with the concentration of 30-40g/L and sodium dodecyl sulfate with the concentration of 0.05-0.1g/L, the pH of the electroplating solution is 3.5-4.5, the temperature of the electroplating solution is 50-60 ℃, pulse parameters of a control current comprise a forward/reverse current density ratio of 1;
s8, after the electroplating is finished, washing off the electroplating solution attached to the surface of the part by workers with clear water to realize fourth cleaning of the part;
and S9, after cleaning, putting the parts into an oven, and drying the parts by controlling the temperature in the oven so as to finally obtain the parts.
2. The pulse nickel fog plating process of claim 1, wherein: in the step S1, the soaking time is 30min.
3. The pulse nickel fog plating process of claim 1, wherein: the nickel preplating solution in the step S5 is a hydrochloric acid + nickel chloride system.
4. The pulse nickel fog plating process of claim 1, wherein: the concentration of the activating solution is 15%.
5. The pulse nickel fog plating process of claim 1, wherein: the electroplating solution comprises 250g/L nickel sulfate heptahydrate, 30g/L nickel chloride hexahydrate, 30g/L boric acid and 0.05g/L sodium dodecyl sulfate, the pH value of the electroplating solution is 4, and the temperature of the electroplating solution is 45 ℃.
6. The pulse nickel fog plating process of claim 1, wherein: the electroplating solution comprises 350g/L nickel sulfate heptahydrate, 50g/L nickel chloride hexahydrate, 40g/L boric acid and 0.1g/L sodium dodecyl sulfate, the pH value of the electroplating solution is 4.5, and the temperature of the electroplating solution is 60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211343409.4A CN115522240A (en) | 2022-10-31 | 2022-10-31 | Pulse nickel fog plating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211343409.4A CN115522240A (en) | 2022-10-31 | 2022-10-31 | Pulse nickel fog plating process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115522240A true CN115522240A (en) | 2022-12-27 |
Family
ID=84702922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211343409.4A Pending CN115522240A (en) | 2022-10-31 | 2022-10-31 | Pulse nickel fog plating process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115522240A (en) |
-
2022
- 2022-10-31 CN CN202211343409.4A patent/CN115522240A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103668359B (en) | A kind of electroplate liquid of multilayer non-cyanide copper electroplating-tin alloy coat, electroplating technology and coin thereof | |
| US3620934A (en) | Method of electrolytic tinning sheet steel | |
| Fei et al. | Electrodeposition of Zn–Co alloys with pulse containing reverse current | |
| CN101146934A (en) | Alkaline galvanizing bath comprising a filtration membrane | |
| CN102363884B (en) | Surface treatment process for zinc alloy die casting | |
| CN101054699B (en) | Plating technique for substituting chemical oxidation of copper and copper alloy | |
| CN101643924A (en) | Full-sulfate trivalent-chromium solution for plating thick chromium and plating method | |
| CN102719876A (en) | Purifying treatment method of nickel plating solution | |
| CN103757672A (en) | Zinc-tin alloy electroplating method | |
| US20060257683A1 (en) | Stainless steel electrolytic coating | |
| US3620936A (en) | Electroplating a decorative chromium-plating resistant to corrosion | |
| CN115522240A (en) | Pulse nickel fog plating process | |
| CN105112971A (en) | Process for electroplating sand nickel on automobile heat-dissipation grating | |
| CN103388164A (en) | Non-cyanide alkaline copper electroplating process and formula | |
| CN105220195A (en) | The husky nickel electroplating technology of a kind of arrangements for automotive doors handle | |
| GB2077764A (en) | Electrodepositing cobalt-zinc alloys stimulating a chromium plating | |
| CN204918818U (en) | Multi -functional intelligent plating bath | |
| US3644184A (en) | Electrolytic gold plating solutions and methods for using same | |
| WO2007144336A2 (en) | Cr(vi)-free black chroming | |
| CN1229148A (en) | Titanium-plating technology for aluminium section material | |
| Fei et al. | Composition and morphology of Zn-Co alloy coatings deposited by means of pulse plating containing reverse current | |
| KR101828698B1 (en) | Plating decoration and manufacturing method | |
| ES2549156T3 (en) | Method for electroplating an article, and electrolytic solution | |
| CN114836801B (en) | Multilayer electroplating process of beryllium bronze elastic device | |
| KR20030075623A (en) | Plating method for lusterless metal layer and products coated by the 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 |