CN105455321B - A kind of Zinc alloy slide fastener sprocket - Google Patents
A kind of Zinc alloy slide fastener sprocket Download PDFInfo
- Publication number
- CN105455321B CN105455321B CN201510937160.3A CN201510937160A CN105455321B CN 105455321 B CN105455321 B CN 105455321B CN 201510937160 A CN201510937160 A CN 201510937160A CN 105455321 B CN105455321 B CN 105455321B
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- Prior art keywords
- plating
- sprocket
- zinc alloy
- coating
- current density
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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
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B19/00—Slide fasteners
- A44B19/24—Details
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
- C23C18/34—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
- C23C18/36—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents using hypophosphites
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
-
- 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
- C25D3/38—Electroplating: Baths therefor from solutions of copper
Abstract
The invention discloses a kind of Zinc alloy slide fastener sprocket, the sprocket is Europe tooth form, including end of engagement and installation end；The zipper sprocket is formed by 5# zinc alloy diecasting, and both ends are the integral structure by the disposable die cast of 5# kirsite, and sprocket long 10mm, wide 8mm, thick 3.5mm, the chain tooth surface is with coating；Coating is formed by following techniques: (1) treatment before plating；(2) non-cyanide pre-plating copper；(3) chemical nickel plating；(4) passivation, sealing of hole.
Description
Technical field
The present invention relates to metallurgical field of electroplating, in particular to a kind of Zinc alloy slide fastener sprocket.
Background technique
Since kirsite is cheap, fusing point is low, especially die-casting process performance is good, is widely used in manufacture hardware and matches
Part, it can also be used to manufacture decorative practical metalwork.Such as various zippers, belt fastener, luggage accessory, vehicle nameplate and soldier
Badge etc..
Zinc alloy diecasting appearance is greyish white, and there are various defects on surface, such as: slag inclusion, shrinkage cavity, therefore, at without surface
In the case where reason, usability and dicoration are excessively poor.Common surface treatment method is plating.According to decorative, function
Property desired difference, electroplating technology has certain difference.Such as, it is divided into gold-plated appearance, silver-plated, chromium plating, plating rifle color etc..But
The pre- electroplating method of coating regardless of appearance, zinc alloy diecasting is identical.So-called preplating refers to and directly connects with kirsite
The coating of touching.Plating after preplating will use different methods according to different demands.
The common electroplating technology of zinc alloy diecasting are as follows: 1. treatment before plating-cyanide electroplating preplating-pyrophosphoric acid copper facing-acidity
Copper facing-bright nickel plating-is gold-plated (silver-plated)；2. treatment before plating-neutrality nickel plating preplating-pyrophosphoric acid copper facing-acid copper-plating-light plating
Nickel-is gold-plated (silver-plated).
Cyanide electroplating pre-metallization solution 30g/L containing cuprous cyanide, Cymag 33g/L.Cyanide copper plating process performance is stable, operates
Simplicity, but due to having used a large amount of cyanides, there are very strict requirements to processing, the technique production management of the plating three wastes.
Again since in recent years, the development of zinc alloy diecasting surface treatment relevant to cyanide copper plating process is very rapid, make containing cyanogen electricity
It is in rising trend to plate bring environmental pollution, therefore, existing cyanide copper plating process has been unable to meet industrial development and environment is protected
The requirement of shield.Especially State Economic and Trade Commission promulgated the 32nd command last year, will contain cyanogen plating and be included in and must force within 2003 to eliminate
One of backwardness technique.The alternative techniques for finding cyanide electroplating have been not only a technical problem.
Neutral nickel preplating is mainly used for the rack plating process of zinc alloy diecasting, and the main component of plating solution is NiSO4, citric acid
Sodium etc. is free of cyanide, but the binding force of nickel coating and matrix can not show a candle to the performance of cyanide electroplating preplating, and product qualification rate is low.
And since activation capacity of the neutral nickel-plating liquid to zinc alloy diecasting is poor, also there is higher requirement to its pre-treatment.It is neutral
Nickel plating technology fundamentally cannot be used the barrel plating of zinc alloy diecasting, and therefore, application range industrially is not very extensive.Separately
Outside, the solution higher cost of neutral nickel plating, wastewater treatment is difficult, limits its large-scale application industrially.
There are also electroless copper, HEDP copper facing, copper-tin alloy plating etc. for other zinc alloy diecasting pre-plating process, because combining
The problems such as power, cost, wastewater treatment and fail to obtain practical application in the industry.
Summary of the invention
In view of the deficiencies of the prior art, one of the objects of the present invention is to provide environmental pollution in a kind of production process is few
Zinc alloy slide fastener, the binding force of the zipper kirsite substrate and plating interlayer is high, and corrosion resistance of coating is high, and flat appearance is beautiful.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of Zinc alloy slide fastener sprocket, the sprocket are Europe tooth form, including end of engagement and installation end；The zipper sprocket is by 5#
Zinc alloy diecasting forms, and both ends are the integral structure by the disposable die cast of 5# kirsite, and sprocket long 10mm, wide 8mm are thick
3.5mm, the chain tooth surface have coating；Wherein, the coating is formed by following techniques:
(1) binding force of coating treatment before plating: is improved including surface degreasing grease removal, acid pickling and rust removing, activation process；
(2) non-cyanide pre-plating copper: wherein plating solution composition is cupric pyrophosphate 100-120g/L；Sodium pyrophosphate 40-50g/L, lemon
Sour trisodium 280-300g/L, sodium potassium tartrate tetrahydrate 26-30g/L, HEDP30-50g/L, ethylenediamine 260-280g/L；Bifluoride hydrogen ammonium
2-3g/L；Sodium fluoride 2-3g/L, lithium fluoride 6-8g/L；Ammonium hydroxide adjusts pH value 8.5-9.5, and electroplating technology is cathode-current density:
Initial current density 2-7A/dm2, time 6-8min；Working current density 1.5-2.5A/dm2, time 10-12min；
(3) chemical nickel plating, plating solution composition and technique chemical nickel plating: are carried out on the zinc alloy diecasting surface of copper pre-plating are as follows:
NiSO4·6H2O 30-40g/L, C6H8O7·H2O 2-4g/L, lactic acid 3-5g/L, propionic acid 0.5-1.5g/L, HF (40%) 16-
20mL/, NH4HF214-16g/L, NaH2PO2·H2O 14-16g/L, NH3·H2O 20-22mL/L, thiocarbamide 2-4mg/L, pH value
4.5-5.5；88-92 DEG C of temperature；Time about 45-55 minutes；
(4) passivation, sealing of hole.
The invention has the following beneficial effects:
1) present invention uses cyanide-free copper electroplating bottoming technique to Zinc alloy slide fastener sprocket, chemical nickel plating is carried out, to be tied
Strong metal coating with joint efforts avoids the consequence that cyanide electroplating bottoming causes environment to be heavily polluted, production technology environmental protection.Metal
Coating coating film thickness is uniform, and corrosion resistance is high, has good static conductive, crocking resistance, appearance looks elegant, and long-time service is not taken off
Color.
2) tune is optimized particular for plating solution composition of the requirement of zipper to non-cyanide pre-plating copper and chemical nickel plating
Whole, above two bath composition is the functional component for being needed and being selected according to plating, lacks any of them one in two kinds of plating solutions
Kind of component will lead to the deterioration of plating effect, and adds other components again and will lead to cost and increase, and be not obviously improved effect, very
It is deteriorated to effect.On the basis of the component determined, and then the content of each component is determined, test proves, only works as each group
Point content be in above scheme limit in the range of when, could obtain adhesive force chamber, corrosion resistance height, appearance looks elegant coating,
Any component deviation above range, will lead to the deterioration of plating outcome, it is therefore contemplated that the group that above scheme limits
Each function ingredients have reached synergistic action effect within the scope of point.
3) cost of material used in the plating technic of zipper of the present invention is cheap, low production cost, and economic benefit is obvious
It improves；Metallising process of the invention is simple, and the ingredient of solution is few, easily controllable, process stabilizing.
Specific embodiment
Embodiment one
A kind of Zinc alloy slide fastener sprocket, the sprocket are Europe tooth form, including end of engagement and installation end；The zipper sprocket is by 5#
Zinc alloy diecasting forms, and both ends are the integral structure by the disposable die cast of 5# kirsite, and sprocket long 10mm, wide 8mm are thick
3.5mm, the chain tooth surface have coating；Wherein, the coating is formed by following techniques:
(1) binding force of coating treatment before plating: is improved including surface degreasing grease removal, acid pickling and rust removing, activation process；
(2) non-cyanide pre-plating copper: wherein plating solution composition is cupric pyrophosphate 100g/L；Sodium pyrophosphate 50g/L, trisodium citrate
280g/L, sodium potassium tartrate tetrahydrate 30g/L, HEDP30g/L, ethylenediamine 280g/L；Bifluoride hydrogen ammonium 2g/L；Sodium fluoride 3g/L, fluorination
Lithium 6g/L；Ammonium hydroxide adjusts pH value 9.5, and electroplating technology is cathode-current density: initial current density 2A/dm2, time 8min；Work
Make current density 1.5A/dm2, time 12min；
(3) chemical nickel plating: chemical nickel plating is carried out on the zinc alloy diecasting surface of copper pre-plating, plating solution composition and technique are
NiSO4·6H2O 30g/L, C6H8O7·H2O 4g/L, lactic acid 3g/L, propionic acid 1.5g/L, HF (40%) 16mL/L, NH4HF2
16g/L, NaH2PO2·H2O 14g/L, NH3·H2O 22mL/L, thiocarbamide 2mg/L, pH value 5.5；88 DEG C of temperature；Time 55 minutes；
(4) passivation, sealing of hole.
Embodiment two
A kind of Zinc alloy slide fastener sprocket, the sprocket are Europe tooth form, including end of engagement and installation end；The zipper sprocket is by 5#
Zinc alloy diecasting forms, and both ends are the integral structure by the disposable die cast of 5# kirsite, and sprocket long 10mm, wide 8mm are thick
3.5mm, the chain tooth surface have coating；Wherein, the coating is formed by following techniques:
(1) binding force of coating treatment before plating: is improved including surface degreasing grease removal, acid pickling and rust removing, activation process；
(2) non-cyanide pre-plating copper: wherein plating solution composition is cupric pyrophosphate 120g/L；Sodium pyrophosphate 40g/L, trisodium citrate
300g/L, sodium potassium tartrate tetrahydrate 26g/L, HEDP50g/L, ethylenediamine 260g/L；Bifluoride hydrogen ammonium 3g/L；Sodium fluoride 2g/L, fluorination
Lithium 8g/L；Ammonium hydroxide adjusts pH value 8.5, and electroplating technology is cathode-current density: initial current density 7A/dm2, time 6min；Work
Make current density 2.5A/dm2, time 10min；
(3) chemical nickel plating: chemical nickel plating is carried out on the zinc alloy diecasting surface of copper pre-plating, plating solution composition and technique are
NiSO4·6H2O 40g/L, C6H8O7·H2O 2g/L, lactic acid 5g/L, propionic acid 0.5g/L, HF (40%) 20mL/L, NH4HF214g/
L, NaH2PO2·H2O 16g/L, NH3·H2O 20mL/L, thiocarbamide 4mg/L, pH value 4.5；92 DEG C of temperature；Time 45 minutes；
(4) passivation, sealing of hole.
Embodiment three
A kind of Zinc alloy slide fastener sprocket, the sprocket are Europe tooth form, including end of engagement and installation end；The zipper sprocket is by 5#
Zinc alloy diecasting forms, and both ends are the integral structure by the disposable die cast of 5# kirsite, and sprocket long 10mm, wide 8rmm are thick
3.5mm, the chain tooth surface have coating；Wherein, the coating is formed by following techniques:
(1) binding force of coating treatment before plating: is improved including surface degreasing grease removal, acid pickling and rust removing, activation process；
(2) non-cyanide pre-plating copper: wherein plating solution composition is cupric pyrophosphate 110g/L；Sodium pyrophosphate 45g/L, trisodium citrate
290g/L, sodium potassium tartrate tetrahydrate 28g/L, HEDP40g/L, ethylenediamine 270g/L；Bifluoride hydrogen ammonium 2.5g/L；Sodium fluoride 2.5g/L,
Lithium fluoride 7g/L；Ammonium hydroxide adjusts pH value 9.0, and electroplating technology is cathode-current density: initial current density 4A/dm2, the time
7min；Working current density 2A/dm2, time 11min；
(3) chemical nickel plating: chemical nickel plating is carried out on the zinc alloy diecasting surface of copper pre-plating, plating solution composition and technique are
NiSO4·6H2O 35g/L, C6H8O7·H2O 3g/L, lactic acid 4g/L, propionic acid 1.0g/L, HF (40%) 18mL/L, NH4HF215g/
L, NaH2PO2·H2O 15g/L, NH3·H2O 21mL/L, thiocarbamide 3mg/L, pH value 5.0；90 DEG C of temperature；Time 50 minutes；
(4) passivation, sealing of hole.
The Applicant declares that the present invention is explained by the above embodiments detailed process equipment and process flow of the invention,
But the present invention is not limited to the above detailed process equipment and process flow, that is, it is above-mentioned detailed not mean that the present invention must rely on
Process equipment and process flow could be implemented.It should be clear to those skilled in the art, any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within of the invention
Within protection scope and the open scope.
Claims (1)
1. a kind of Zinc alloy slide fastener sprocket, the sprocket is Europe tooth form, including end of engagement and installation end；The zipper sprocket is by 5# zinc
Alloy die cast forms, and both ends are the integral structure by the disposable die cast of 5# kirsite, and sprocket long 10mm, wide 8mm are thick
3.5mm, the chain tooth surface have coating；It is characterized in that, the coating is formed by following techniques:
(1) binding force of coating treatment before plating: is improved including surface degreasing grease removal, acid pickling and rust removing, activation process；
(2) non-cyanide pre-plating copper: wherein plating solution composition is cupric pyrophosphate 100-120g/L；Sodium pyrophosphate 40-50g/L, citric acid three
Sodium 280-300g/L, sodium potassium tartrate tetrahydrate 26-30g/L, HEDP30-50g/L, ethylenediamine 260-280g/L；Bifluoride hydrogen ammonium 2-3g/
L；Sodium fluoride 2-3g/L, lithium fluoride 6-8g/L；Ammonium hydroxide adjusts pH value 8.5-9.5, and electroplating technology is cathode-current density: initial
Current density 2-7A/dm2, time 6-8min；Working current density 1.5-2.5A/dm2, time 10-12min；
(3) chemical nickel plating, plating solution composition and technique chemical nickel plating: are carried out on the zinc alloy diecasting surface of copper pre-plating are as follows:
NiSO4·6H2O 30-40g/L, C6H8O7·H2O 2-4g/L, lactic acid 3-5g/L, propionic acid 0.5-1.5g/L, HF (40%)
16-20mL/L, NH4HF214-16g/L, NaH2PO2·H2O 14-16g/L, NH3·H2O 20-22mL/L, thiocarbamide 2-4mg/L,
PH value 4.5-5.5；88-92 DEG C of temperature；Time 45-55 minute；
(4) passivation, sealing of hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510937160.3A CN105455321B (en) | 2015-12-16 | 2015-12-16 | A kind of Zinc alloy slide fastener sprocket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510937160.3A CN105455321B (en) | 2015-12-16 | 2015-12-16 | A kind of Zinc alloy slide fastener sprocket |
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| Publication Number | Publication Date |
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| CN105455321A CN105455321A (en) | 2016-04-06 |
| CN105455321B true CN105455321B (en) | 2019-01-22 |
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| CN112522685A (en) * | 2020-12-03 | 2021-03-19 | 江苏思瑞奕精密科技有限公司 | Zinc alloy surface treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4469569A (en) * | 1983-01-03 | 1984-09-04 | Omi International Corporation | Cyanide-free copper plating process |
| CN1598059A (en) * | 2004-08-05 | 2005-03-23 | 广州杰赛科技股份有限公司 | Magnesium alloy non cyanogen plating copper chemical plating nickle and its plating process |
| CN103898585A (en) * | 2013-06-03 | 2014-07-02 | 无锡市锡山区鹅湖镇荡口青荡金属制品厂 | Surface chromium electroplating technique of magnesium alloy die casting |
| CN104146444A (en) * | 2014-08-01 | 2014-11-19 | 温州市龙湾状元宏达压铸厂 | Zinc-alloy zipper |
-
2015
- 2015-12-16 CN CN201510937160.3A patent/CN105455321B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4469569A (en) * | 1983-01-03 | 1984-09-04 | Omi International Corporation | Cyanide-free copper plating process |
| CN1598059A (en) * | 2004-08-05 | 2005-03-23 | 广州杰赛科技股份有限公司 | Magnesium alloy non cyanogen plating copper chemical plating nickle and its plating process |
| CN103898585A (en) * | 2013-06-03 | 2014-07-02 | 无锡市锡山区鹅湖镇荡口青荡金属制品厂 | Surface chromium electroplating technique of magnesium alloy die casting |
| CN104146444A (en) * | 2014-08-01 | 2014-11-19 | 温州市龙湾状元宏达压铸厂 | Zinc-alloy zipper |
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| CN105455321A (en) | 2016-04-06 |
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