CN108866591A - Front-wheel hub electroplating technology - Google Patents
Front-wheel hub electroplating technology Download PDFInfo
- Publication number
- CN108866591A CN108866591A CN201810959949.2A CN201810959949A CN108866591A CN 108866591 A CN108866591 A CN 108866591A CN 201810959949 A CN201810959949 A CN 201810959949A CN 108866591 A CN108866591 A CN 108866591A
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- China
- Prior art keywords
- nickel
- solution
- layers
- spoke
- wheel rim
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- 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.)
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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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
- C25D3/08—Deposition of black chromium, e.g. hexavalent chromium, CrVI
-
- 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
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
Abstract
The invention discloses a kind of front-wheel hub electroplating technologies, wheel rim and spoke are handled using at least five sanding and polishings, then electrolytic degreasing, eventually pass through at least four layers of electronickelling, and the sulfur content of every layer of nickel is different, generates the potential difference of 120mv or more, enhances corrosion resistance, while being all made of electrification when every time by taking out and being placed again into nickel solution in nickel solution and taking out and charge and entering, enhance the binding force between each layer nickel.
Description
Technical field
The invention belongs to wheel hub electroplating technology field, more specifically to a kind of front-wheel hub electroplating technology.
Background technique
The matrix surface of wheel hub need to carry out Ni-Speed, and wheel hub nickel plating technology is more simple and crude at present, and nickel layer is easily fallen off,
Corrosion Protection is poor, typically directly directly longitudinally erodes to matrix by outside, and the binding force between nickel layer is poor.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of pair of wheel hub each sections to carry out repeatedly fine polishing, carries out
Multiple layer nickel plating makes there are the potential difference of 120mv or more between two layers of nickel and four layers of nickel, and the front-wheel hub for enhancing corrosion resistance is electroplated
Technique.
To achieve the above object, the present invention provides following technical solutions：A kind of front-wheel hub electroplating technology, including it is as follows
Step：
A) it is successively polished in the following order respectively the wheel rim of wheel hub and spoke：1. utilizing 80#-100# grinder buffing surface
2. oxide skin, point, pit, folder print utilize 180# grinder buffing crin and do not polish clean point, pit, folder to clean
Print, 3. using 240# grinder buffing the Silk Road, point, pit, folder print to surfacing, the Silk Road is uniform, 4. applies on 320# grinding wheel
One layer of butter sanding and polishing silk again is smeared, 5. one layer of butter is smeared on 400# grinding wheel and continues to polish；
B) electrolytic degreasing：Wheel rim and spoke are placed in alkaline solution and carry out electrolytic degreasing；
C) one layer of nickel is plated：Wheel rim and spoke are put into one layer of nickel solution slot respectively in uncharged situation and are electroplated, one layer of nickel
Solution is made of nickel chloride and hydrochloric acid, and wherein nickel chloride is 100-150g/L, hydrochloric acid 150g/L, in solution temperature 20-30 degree, electricity
Current density is 0.4-0.8A/dm2；
D) two layers of nickel are plated：By step c）Middle wheel rim and spoke are placed in two layers of nickel solution, and two layers of nickel solution are by nickel sulfate, chlorination
Nickel, boric acid composition, wherein nickel sulfide is 300-350g/L, nickel chloride 30-40g/L, boric acid 40-45g/L, solution pH value
3.5-4.5, temperature 50-55 degree, air stirring or movable cathode plating, current density is 2-5 A/dm2, and uses continuous mistake
Filter；
E) three layers of nickel are plated：By step d）Middle wheel rim and spoke are placed in three layers of nickel solution, and three layers of nickel solution are by nickel sulfate, chlorination
Nickel, boric acid composition, wherein nickel sulfate is 250-320g/L, nickel chloride 40-60g/L, boric acid 35-45g/L, solution pH value
4.4-4.8, temperature 50-60 degree, is electroplated under air stirring, cathode-current density 3-6 A/dm2, anodic current density 2-
3 A/dm2, electroplating time 2-4min；
F) four layers of nickel are plated：By step e）Middle wheel rim and spoke are placed in four layers of nickel solution, and four layers of nickel solution are by nickel sulfate, chlorination
Nickel, boric acid composition, wherein nickel sulfate is 300-350g/L, nickel chloride 35-45g/L, boric acid 40-45g/L, solution pH value
3.8-4.6, temperature 50-60 degree, air stirring or movable cathode plating, current density 2-5 A/dm2, and using continuous filtering；
G) chromium plating：By step f）Middle wheel rim and spoke are placed in chromium solution, and chromium solution is made of chromic acid, sulfuric acid, wherein chromic acid
The ratio of 180-300g/L, sulfuric acid 0.6-1.5g/L, chromic acid and sulfuric acid is 100:0.3-0.5, chromium solution temperature 38-43 degree, plating
Process voltage 6-15V, cathode-current density 10-30 A/dm2；
H) it welds：By step g）Wheel rim and the spoke place to be welded of completion are polishing to exposing matrix and are welded.
Further in the step d）,e）,f）In be all made of wheel rim and spoke charges into solution and charges out solution.
Further in step d）Middle nickel sulfate is 330g/L, nickel chloride 35g/L, boric acid 43g/L, step e）Middle sulphur
Sour nickel is 280g/L, nickel chloride 50g/L, boric acid 40g/L, step f）Middle nickel sulfate be 320g/L, nickel chloride 40g/L,
Boric acid is 42g/L.
Compared with prior art, the beneficial effects of the invention are as follows：1, the wheel hub of matrix and wheel rim are separated into first electroplating processes
It welds again, the connecting sewing for being guaranteed at outside can also be electroplated completely；
2, different by the sulfur content between each layer, increase potential difference, makes the process change lateral encroaching longitudinally corroded originally,
Delay corrosion progress, enhances corrosion resistance；
3, solution is charged out into solution mixing by charging, can avoid duplicate rows electrode phenomenon, to avoid the knot between each layer nickel
With joint efforts, make between nickel layer combine it is even closer securely, prevent nickel layer obscission.
4, by the use of accurate solution ratio and plating conditions, make final wheel hub corrosion resistance is electroplated and reach more
Height, service life greatly prolong.
Specific embodiment
Embodiment one：A kind of front-wheel hub electroplating technology, includes the following steps：
A) it is successively polished in the following order respectively the wheel rim of wheel hub and spoke：1. utilizing the oxygen on 80#-100# grinder buffing surface
Change skin, point, pit, folder print to clean, 2. using 180# grinder buffing crin and clean point of not polishing, pit, folder print,
3. the Silk Road is uniform, 4. smears one on 320# grinding wheel using 240# grinder buffing the Silk Road, point, pit, folder print to surfacing
5. layer butter sanding and polishing silk again smears one layer of butter on 400# grinding wheel and continues to polish；
B) electrolytic degreasing：Wheel rim and spoke are placed in alkaline solution and carry out electrolytic degreasing, in cathode or anode when electrolytic degreasing
On can carry out；
C) one layer of nickel is plated：Wheel rim and spoke are put into one layer of nickel solution slot respectively in uncharged situation and are electroplated, one layer of nickel
Solution is made of nickel chloride and hydrochloric acid, and wherein nickel chloride is 150g/L, hydrochloric acid 150g/L, in 30 degree of solution temperature, current density
For 0.8A/dm2；
D) two layers of nickel are plated：By step c）Middle wheel rim and spoke electrification are placed in two layers of nickel solution, and two layers of nickel solution are by nickel sulfate, chlorine
Change nickel, boric acid composition, wherein nickel sulfide is 350g/L, nickel chloride 40g/L, boric acid 45g/L, solution pH value 4.5, temperature 55
Degree, air stirring or movable cathode plating, current density are 5 A/dm2, and using continuous filtering；
E) three layers of nickel are plated：By step d）Middle wheel rim and spoke charge out two layers of nickel solution, and charge and be placed in three layers of nickel solution, and three
Layer nickel solution is made of nickel sulfate, nickel chloride, boric acid, and wherein nickel sulfate is 320g/L, nickel chloride 60g/L, boric acid 45g/
L, solution pH value 4.8, are electroplated under air stirring by 60 degree of temperature, 6 A/dm2 of cathode-current density, anodic current density 3
A/dm2, electroplating time 4min；
F) four layers of nickel are plated：By step e）Middle wheel rim and spoke charge out three layers of nickel solution, and charge and be placed in four layers of nickel solution, and four
Layer nickel solution is made of nickel sulfate, nickel chloride, boric acid, and wherein nickel sulfate is 350g/L, nickel chloride 45g/L, boric acid 45g/
L, solution pH value 4.6,60 degree of temperature, air stirring or movable cathode are electroplated, 5 A/dm2 of current density, and using continuous filtering；
G) chromium plating：By step f）Middle wheel rim and spoke are placed in chromium solution, and chromium solution is made of chromic acid, sulfuric acid, wherein chromic acid
The ratio of 300g/L, sulfuric acid 1.5g/L, chromic acid and sulfuric acid is 100:0.5,43 degree of chromium solution temperature, electroplating process voltage 15V, yin
30 A/dm2 of electrode current density；
H) it welds：By step g）Wheel rim and the spoke place to be welded of completion are polishing to exposing matrix and are welded.
Embodiment two：A kind of front-wheel hub electroplating technology, includes the following steps：
A) it is successively polished in the following order respectively the wheel rim of wheel hub and spoke：1. utilizing the oxygen on 80#-100# grinder buffing surface
Change skin, point, pit, folder print to clean, 2. using 180# grinder buffing crin and clean point of not polishing, pit, folder print,
3. the Silk Road is uniform, 4. smears one on 320# grinding wheel using 240# grinder buffing the Silk Road, point, pit, folder print to surfacing
5. layer butter sanding and polishing silk again smears one layer of butter on 400# grinding wheel and continues to polish；
B) electrolytic degreasing：Wheel rim and spoke are placed in alkaline solution and carry out electrolytic degreasing, in cathode or anode when electrolytic degreasing
On can carry out；
C) one layer of nickel is plated：Wheel rim and spoke are put into one layer of nickel solution slot respectively in uncharged situation and are electroplated, one layer of nickel
Solution is made of nickel chloride and hydrochloric acid, and wherein nickel chloride is 100g/L, hydrochloric acid 150g/L, in 25 degree of solution temperature, current density
For 0.4A/dm2；
D) two layers of nickel are plated：By step c）Middle wheel rim and spoke electrification are placed in two layers of nickel solution, and two layers of nickel solution are by nickel sulfate, chlorine
Change nickel, boric acid composition, wherein nickel sulfide is 300g/L, nickel chloride 30g/L, boric acid 40g/L, solution pH value 3.5, temperature 50
Degree, air stirring or movable cathode plating, current density are 2 A/dm2, and using continuous filtering；
E) three layers of nickel are plated：By step d）Middle wheel rim and spoke charge out two layers of nickel solution, and charge and be placed in three layers of nickel solution, and three
Layer nickel solution is made of nickel sulfate, nickel chloride, boric acid, and wherein nickel sulfate is 250g/L, nickel chloride 40g/L, boric acid 35g/
L, solution pH value 4.4, are electroplated under air stirring by 50 degree of temperature, 3 A/dm2 of cathode-current density, anodic current density
2A/dm2, electroplating time 2min；
F) four layers of nickel are plated：By step e）Middle wheel rim and spoke charge out three layers of nickel solution, and charge and be placed in four layers of nickel solution, and four
Layer nickel solution is made of nickel sulfate, nickel chloride, boric acid, and wherein nickel sulfate is 300g/L, nickel chloride 35g/L, boric acid 40g/
L, solution pH value 3.8,50 degree of temperature, air stirring or movable cathode are electroplated, 2 A/dm2 of current density, and using continuous filtering；
G) chromium plating：By step f）Middle wheel rim and spoke are placed in chromium solution, and chromium solution is made of chromic acid, sulfuric acid, wherein chromic acid
The ratio of 180g/L, sulfuric acid 0.6g/L, chromic acid and sulfuric acid is 100:0.3,38 degree of chromium solution temperature, electroplating process voltage 6V, cathode
10 A/dm2 of current density；
H) it welds：By step g）Wheel rim and the spoke place to be welded of completion are polishing to exposing matrix and are welded.
Embodiment three：A kind of front-wheel hub electroplating technology, includes the following steps：
A) it is successively polished in the following order respectively the wheel rim of wheel hub and spoke：1. utilizing the oxygen on 80#-100# grinder buffing surface
Change skin, point, pit, folder print to clean, 2. using 180# grinder buffing crin and clean point of not polishing, pit, folder print,
3. the Silk Road is uniform, 4. smears one on 320# grinding wheel using 240# grinder buffing the Silk Road, point, pit, folder print to surfacing
5. layer butter sanding and polishing silk again smears one layer of butter on 400# grinding wheel and continues to polish；
B) electrolytic degreasing：Wheel rim and spoke are placed in alkaline solution and carry out electrolytic degreasing, in cathode or anode when electrolytic degreasing
On can carry out；
C) one layer of nickel is plated：Wheel rim and spoke are put into one layer of nickel solution slot respectively in uncharged situation and are electroplated, one layer of nickel
Solution is made of nickel chloride and hydrochloric acid, and wherein nickel chloride is 125g/L, hydrochloric acid 150g/L, in 28 degree of solution temperature, current density
For 0.6A/dm2；
D) two layers of nickel are plated：By step c）Middle wheel rim and spoke electrification are placed in two layers of nickel solution, and two layers of nickel solution are by nickel sulfate, chlorine
Change nickel, boric acid composition, wherein nickel sulfide is 330g/L, nickel chloride 35g/L, boric acid 43g/L, solution pH value 4, temperature 53
Degree, air stirring or movable cathode plating, current density are 3.5 A/dm2, and using continuous filtering；
E) three layers of nickel are plated：By step d）Middle wheel rim and spoke charge out two layers of nickel solution, and charge and be placed in three layers of nickel solution, and three
Layer nickel solution is made of nickel sulfate, nickel chloride, boric acid, and wherein nickel sulfate is 280g/L, nickel chloride 50g/L, boric acid 40g/
L, solution pH value 4.6, are electroplated under air stirring by 55 degree of temperature, 4.5 A/dm2 of cathode-current density, and anode current is close
Spend 2.5A/dm2, electroplating time 3min；
F) four layers of nickel are plated：By step e）Middle wheel rim and spoke charge out three layers of nickel solution, and charge and be placed in four layers of nickel solution, and four
Layer nickel solution is made of nickel sulfate, nickel chloride, boric acid, and wherein nickel sulfate is 320g/L, nickel chloride 40g/L, boric acid 42g/
L, solution pH value 4.2,55 degree of temperature, air stirring or movable cathode are electroplated, 3.5 A/dm2 of current density, and use continuous mistake
Filter；
G) chromium plating：By step f）Middle wheel rim and spoke are placed in chromium solution, and chromium solution is made of chromic acid, sulfuric acid, wherein chromic acid
250g/L, sulfuric acid 1g/L, 40 degree of chromium solution temperature, electroplating process voltage 10V, 20 A/dm2 of cathode-current density；
H) it welds：By step g）Wheel rim and the spoke place to be welded of completion are polishing to exposing matrix and are welded.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of front-wheel hub electroplating technology, which is characterized in that include the following steps：
A) it is successively polished in the following order respectively the wheel rim of wheel hub and spoke：1. utilizing the oxygen on 80#-100# grinder buffing surface
Change skin, point, pit, folder print to clean, 2. using 180# grinder buffing crin and clean point of not polishing, pit, folder print,
3. the Silk Road is uniform, 4. smears one on 320# grinding wheel using 240# grinder buffing the Silk Road, point, pit, folder print to surfacing
5. layer butter sanding and polishing silk again smears one layer of butter on 400# grinding wheel and continues to polish；
B) electrolytic degreasing：Wheel rim and spoke are placed in alkaline solution and carry out electrolytic degreasing；
C) one layer of nickel is plated：Wheel rim and spoke are put into one layer of nickel solution slot respectively in uncharged situation and are electroplated, one layer of nickel
Solution is made of nickel chloride and hydrochloric acid, and wherein nickel chloride is 100-150g/L, hydrochloric acid 150g/L, in solution temperature 20-30 degree, electricity
Current density is 0.4-0.8A/dm2；
D) two layers of nickel are plated：Wheel rim and spoke in step c) are placed in two layers of nickel solution, two layers of nickel solution are by nickel sulfate, chlorination
Nickel, boric acid composition, wherein nickel sulfide is 300-350g/L, nickel chloride 30-40g/L, boric acid 40-45g/L, solution pH value
3.5-4.5, temperature 50-55 degree, air stirring or movable cathode plating, current density 2-5A/dm2, and using continuous filtering；
E) three layers of nickel are plated：Wheel rim and spoke in step d) are placed in three layers of nickel solution, three layers of nickel solution are by nickel sulfate, chlorination
Nickel, boric acid composition, wherein nickel sulfate is 250-320g/L, nickel chloride 40-60g/L, boric acid 35-45g/L, solution pH value
4.4-4.8, temperature 50-60 degree, is electroplated under air stirring, cathode-current density 3-6A/dm2, anodic current density 2-
3A/dm2, electroplating time 2-4min；
F) four layers of nickel are plated：Wheel rim and spoke in step e) are placed in four layers of nickel solution, four layers of nickel solution are by nickel sulfate, chlorination
Nickel, boric acid composition, wherein nickel sulfate is 300-350g/L, nickel chloride 35-45g/L, boric acid 40-45g/L, solution pH value
3.8-4.6, temperature 50-60 degree, air stirring or movable cathode plating, current density 2-5A/dm2, and using continuous filtering；
G) chromium plating：Wheel rim and spoke in step f) are placed in chromium solution, chromium solution is made of chromic acid, sulfuric acid, wherein chromic acid
The ratio of 180-300g/L, sulfuric acid 0.6-1.5g/L, chromic acid and sulfuric acid is 100:0.3-0.5, chromium solution temperature 38-43 degree, plating
Process voltage 6-15V, cathode-current density 10-30A/dm2；
H) it welds：Step g) the wheel rim completed and spoke place to be welded are polishing to exposing matrix to weld.
2. front-wheel hub electroplating technology according to claim 1, it is characterised in that：In the step d), e), f) in adopt
It is charged with wheel rim and spoke into solution and charges out solution.
3. front-wheel hub electroplating technology according to claim 2, it is characterised in that：Nickel sulfate is 330g/ in step d)
In L, nickel chloride 35g/L, boric acid 43g/L, step e) nickel sulfate be 280g/L, nickel chloride 50g/L, boric acid 40g/L,
Nickel sulfate is 320g/L, nickel chloride 40g/L, boric acid 42g/L in step f).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810959949.2A CN108866591A (en) | 2018-08-22 | 2018-08-22 | Front-wheel hub electroplating technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810959949.2A CN108866591A (en) | 2018-08-22 | 2018-08-22 | Front-wheel hub electroplating technology |
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| Publication Number | Publication Date |
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| CN108866591A true CN108866591A (en) | 2018-11-23 |
Family
ID=64321238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810959949.2A Pending CN108866591A (en) | 2018-08-22 | 2018-08-22 | Front-wheel hub electroplating technology |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048741A (en) * | 2019-06-05 | 2020-12-08 | 中国科学院金属研究所 | Si3N4Preparation method and application of/Ni titanium alloy blade tip protective coating |
| CN114752972A (en) * | 2022-05-10 | 2022-07-15 | 台山鸿艺精密技术有限公司 | Hub electroplating processing technology |
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| CN102766894A (en) * | 2012-07-19 | 2012-11-07 | 上海杜行电镀有限公司 | Aluminum hub electroplating method using super corrosion-resistant multi-layer nickel electroplating solution |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048741A (en) * | 2019-06-05 | 2020-12-08 | 中国科学院金属研究所 | Si3N4Preparation method and application of/Ni titanium alloy blade tip protective coating |
| CN112048741B (en) * | 2019-06-05 | 2022-05-31 | 中国科学院金属研究所 | Si3N4Preparation method and application of/Ni titanium alloy blade tip protective coating |
| CN114752972A (en) * | 2022-05-10 | 2022-07-15 | 台山鸿艺精密技术有限公司 | Hub electroplating processing technology |
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