CN105455321A - Zinc alloy zipper teeth - Google Patents

Zinc alloy zipper teeth Download PDF

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Publication number
CN105455321A
CN105455321A CN201510937160.3A CN201510937160A CN105455321A CN 105455321 A CN105455321 A CN 105455321A CN 201510937160 A CN201510937160 A CN 201510937160A CN 105455321 A CN105455321 A CN 105455321A
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plating
zinc alloy
coating
sprocket
current density
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CN201510937160.3A
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CN105455321B (en
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张颖
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Ningxia Dinghui Technology Co.,Ltd.
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张颖
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    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

The invention discloses zinc alloy zipper teeth. The zipper teeth are in the form of Swiss zipper teeth, and comprise an engaged end and a mounted end, wherein the zipper teeth are formed by die-casting 5# zinc alloy and two ends are integrated structure which is molded through one-time die-casting of 5# zinc alloy; the zipper teeth are 10mm long, 8mm wide and 3.5mm thick; a coating is arranged on the surfaces of the zipper teeth; and the coating is formed by the following processes: (1) processing before coating; (2) pre-coating copper without cyanogen; (3) chemical nickel-plating; (4) passivating and hole sealing.

Description

A kind of Zinc alloy slide fastener sprocket
Technical field
The present invention relates to metallurgical field of electroplating, particularly a kind of Zinc alloy slide fastener sprocket.
Background technology
Because kirsite low price, fusing point are low, particularly extrusion process performance is good, has been widely used in and has manufactured hardware accessory, also can be used for manufacturing ornamental practical metalwork.As the badge etc. of various slide fastener, belt fastener, case and bag accessory, vehicle nameplate and soldier.
Zinc alloy diecasting appearance is greyish white, and there is various defect on surface, as: slag inclusion, shrinkage cavity etc., therefore, in not surface treated situation, its usability and ornamental all non-constant.Common surface treatment method is plating.According to difference that is ornamental, Functional Requirement, electroplating technology has certain difference.As, have that appearance is gold-plated, silver-plated, chromium plating, plating rifle look etc. point.But regardless of the coating of appearance, the pre-electroplating method of zinc alloy diecasting is identical.So-called preplating, refers to the coating directly contacted with kirsite.Plating after preplating, will adopt diverse ways according to different demand.
The electroplating technology that zinc alloy diecasting is conventional is: 1. treatment before plating-cyanide electroplating preplating-pyrophosphoric acid copper facing-acid copper-plating-bright nickel plating-gold-plated (silver-plated); 2. treatment before plating-neutral nickel plating preplating-pyrophosphoric acid copper facing-acid copper-plating-bright nickel plating-gold-plated (silver-plated).
Cyanide electroplating pre-metallization solution is containing cuprous cyanide 30g/L, Cymag 33g/L.Cyanide copper plating process stable performance, easy and simple to handle, but owing to employing a large amount of cyanide, all there is very strict requirement to the process of the plating three wastes, explained hereafter management.Again due in recent years; the zinc alloy diecasting surface-treated development relevant to cyanide copper plating process is very rapid; make to electroplate containing cyanogen the environmental pollution brought in rising trend, therefore, existing cyanide copper plating process can not meet the requirement of industrial development and environmental protection.Particularly State Economic and Trade Commission promulgated the 32nd command last year, included one of backward technique must forcing for 2003 to eliminate in by containing cyanogen plating.The alternative techniques finding cyanide electroplating has been not only a technical problem.
Neutral nickel preplating is mainly used in the rack plating process of zinc alloy diecasting, and the main component of plating solution is NiSO 4, natrium citricum etc., containing cyanide, but the adhesion of nickel coating and matrix can not show a candle to the performance of cyanide electroplating preplating, and product percent of pass is low.And due to the activation capacity of neutral nickel-plating liquid to zinc alloy diecasting poor, also have higher requirement to its pre-treatment.Neutral nickel plating technology generally can not be used for the barrel plating of zinc alloy diecasting, and therefore, range of application is not industrially very extensive.In addition, the solution cost of neutral nickel plating is higher, and wastewater treatment difficulty, limits its large-scale application industrially.
Other zinc alloy diecasting pre-plating process also have electroless copper, HEDP copper facing, signal bronze plating etc., all fail to obtain practical application in the industry because of problems such as adhesion, cost, wastewater treatments.
Summary of the invention
For the deficiencies in the prior art, an object of the present invention is to provide the Zinc alloy slide fastener that in a kind of production process, environmental pollution is few, and the adhesion between this slide fastener kirsite base material and coating is high, and corrosion resistance of coating is high, and flat appearance is attractive in appearance.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of Zinc alloy slide fastener sprocket, described sprocket is Europe tooth form, comprises end of engagement and installation end; This zipper sprocket is formed by 5# zinc alloy diecasting, and two ends are by the integrative-structure of the disposable die cast of 5# kirsite, the long 10mm of sprocket, wide 8mm, thick 3.5mm, and described chain tooth surface has coating; Wherein, described coating is formed by following technique:
(1) treatment before plating: comprise surface degreasing grease removal, acid pickling and rust removing, activated process to improve the adhesion of coating;
(2) non-cyanide pre-plating copper: wherein solution composition is cupric pyrophosphate 100-120g/L; Sodium pyrophosphate 40-50g/L, trisodium citrate 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; Ammoniacal liquor adjust ph 8.5-9.5, electroplating technology is cathode-current density: initial current density 2-7A/dm 2, time 6-8min; Working current density 1.5-2.5A/dm 2, time 10-12min;
(3) chemical nickel plating: carry out chemical nickel plating on the zinc alloy diecasting surface of copper pre-plating, solution composition and technique are: NiSO 46H 2o30-40g/L, C 6h 8o 7h 2o2-4g/L, lactic acid 3-5g/L, propionic acid 0.5-1.5g/L, HF (40%) 16-20mL/, NH 4hF 214-16g/L, NaH 2pO 2h 2o14-16g/L, NH 3h 2o20-22mL/L, thiocarbamide 2-4mg/L, pH value 4.5-5.5; Temperature 88-92 DEG C; Time is about 45-55 minute;
(4) passivation, sealing of hole.
The present invention has following beneficial effect:
1) the present invention adopts cyanide-free copper electroplating bottoming technique to Zinc alloy slide fastener sprocket, carries out chemical nickel plating, thus obtains the strong metal coating of adhesion, avoids the consequence that cyanide electroplating bottoming causes environment to be heavily polluted, production technology environmental protection.Metal coating coating film thickness is even, and corrosion resistance is high, and have good static conductive, crocking resistance, appearance looks elegant, Long-Time Service is colour-fast.
2) adjustment is optimized for the solution composition of instructions for use to non-cyanide pre-plating copper and chemical nickel plating of slide fastener especially, above-mentioned two kinds of bath compositions are need according to plating the functional component selected, lack wherein any one component in two kinds of plating solutions and will cause plating effect deteriorate, and add other component again and will cause cost up, and do not have clear improvement effect, even deleterious.On the basis of the component determined, and then determine the content of each component, test proves, when only having the content when each component to be in the scope of such scheme restriction, could obtain that adhesive force chamber, corrosion resistance are high, the coating of appearance looks elegant, the above-mentioned scope of any one component deviation, all will cause the deterioration of plating outcome, therefore, can think that each function ingredients reaches synergistic action effect in the compositional range that such scheme limits.
3) cost of material used in the plating technic of slide fastener of the present invention is cheap, low production cost, and economic benefit significantly improves; Metallising process of the present invention is simple, and the composition of solution is few, is easy to control, process stabilizing.
Detailed description of the invention
Embodiment one
A kind of Zinc alloy slide fastener sprocket, described sprocket is Europe tooth form, comprises end of engagement and installation end; This zipper sprocket is formed by 5# zinc alloy diecasting, and two ends are by the integrative-structure of the disposable die cast of 5# kirsite, the long 10mm of sprocket, wide 8mm, thick 3.5mm, and described chain tooth surface has coating; Wherein, described coating is formed by following technique:
(1) treatment before plating: comprise surface degreasing grease removal, acid pickling and rust removing, activated process to improve the adhesion of coating;
(2) non-cyanide pre-plating copper: wherein 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, lithium fluoride 6g/L; Ammoniacal liquor adjust ph 9.5, electroplating technology is cathode-current density: initial current density 2A/dm 2, time 8min; Working current density 1.5A/dm 2, time 12min;
(3) chemical nickel plating: carry out chemical nickel plating on the zinc alloy diecasting surface of copper pre-plating, solution composition and technique are NiSO 46H 2o30g/L, C 6h 8o 7h 2o4g/L, lactic acid 3g/L, propionic acid 1.5g/L, HF (40%) 16mL/L, NH 4hF 216g/L, NaH 2pO 2h 2o14g/L, NH 3h 2o22mL/L, thiocarbamide 2mg/L, pH value 5.5; Temperature 88 DEG C; 55 minutes time;
(4) passivation, sealing of hole.
Embodiment two
A kind of Zinc alloy slide fastener sprocket, described sprocket is Europe tooth form, comprises end of engagement and installation end; This zipper sprocket is formed by 5# zinc alloy diecasting, and two ends are by the integrative-structure of the disposable die cast of 5# kirsite, the long 10mm of sprocket, wide 8mm, thick 3.5mm, and described chain tooth surface has coating; Wherein, described coating is formed by following technique:
(1) treatment before plating: comprise surface degreasing grease removal, acid pickling and rust removing, activated process to improve the adhesion of coating;
(2) non-cyanide pre-plating copper: wherein 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, lithium fluoride 8g/L; Ammoniacal liquor adjust ph 8.5, electroplating technology is cathode-current density: initial current density 7A/dm 2, time 6min; Working current density 2.5A/dm 2, time 10min;
(3) chemical nickel plating: carry out chemical nickel plating on the zinc alloy diecasting surface of copper pre-plating, solution composition and technique are NiSO 46H 2o40g/L, C 6h 8o 7h 2o2g/L, lactic acid 5g/L, propionic acid 0.5g/L, HF (40%) 20mL/L, NH 4hF 214g/L, NaH 2pO 2h 2o16g/L, NH 3h 2o20mL/L, thiocarbamide 4mg/L, pH value 4.5; Temperature 92 DEG C; 45 minutes time;
(4) passivation, sealing of hole.
Embodiment three
A kind of Zinc alloy slide fastener sprocket, described sprocket is Europe tooth form, comprises end of engagement and installation end; This zipper sprocket is formed by 5# zinc alloy diecasting, and two ends are by the integrative-structure of the disposable die cast of 5# kirsite, the long 10mm of sprocket, wide 8rmm, thick 3.5mm, and described chain tooth surface has coating; Wherein, described coating is formed by following technique:
(1) treatment before plating: comprise surface degreasing grease removal, acid pickling and rust removing, activated process to improve the adhesion of coating;
(2) non-cyanide pre-plating copper: wherein 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; Ammoniacal liquor adjust ph 9.0, electroplating technology is cathode-current density: initial current density 4A/dm 2, time 7min; Working current density 2A/dm 2, time 11min;
(3) chemical nickel plating: carry out chemical nickel plating on the zinc alloy diecasting surface of copper pre-plating, solution composition and technique are NiSO 46H 2o35g/L, C 6h 8o 7h 2o3g/L, lactic acid 4g/L, propionic acid 1.0g/L, HF (40%) 18mL/L, NH 4hF 215g/L, NaH 2pO 2h 2o15g/L, NH 3h 2o21mL/L, thiocarbamide 3mg/L, pH value 5.0; Temperature 90 DEG C; 50 minutes time;
(4) passivation, sealing of hole.
Applicant states, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, namely do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of auxiliary element, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.

Claims (1)

1. a Zinc alloy slide fastener sprocket, described sprocket is Europe tooth form, comprises end of engagement and installation end; This zipper sprocket is formed by 5# zinc alloy diecasting, and two ends are by the integrative-structure of the disposable die cast of 5# kirsite, the long 10mm of sprocket, wide 8mm, thick 3.5mm, and described chain tooth surface has coating; It is characterized in that, described coating is formed by following technique:
(1) treatment before plating: comprise surface degreasing grease removal, acid pickling and rust removing, activated process to improve the adhesion of coating;
(2) non-cyanide pre-plating copper: wherein solution composition is cupric pyrophosphate 100-120g/L; Sodium pyrophosphate 40-50g/L, trisodium citrate 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; Ammoniacal liquor adjust ph 8.5-9.5, electroplating technology is cathode-current density: initial current density 2-7A/dm 2, time 6-8min; Working current density 1.5-2.5A/dm 2, time 10-12min;
(3) chemical nickel plating: carry out chemical nickel plating on the zinc alloy diecasting surface of copper pre-plating, solution composition and technique are:
NiSO 46H 2o30-40g/L, C 6h 8o 7h 2o2-4g/L, lactic acid 3-5g/L, propionic acid 0.5-1.5g/L, HF (40%) 16-20mL/L, NH 4hF 214-16g/L, NaH 2pO 2h 2o14-16g/L, NH 3h 2o20-22mL/L, thiocarbamide 2-4mg/L, pH value 4.5-5.5; Temperature 88-92 DEG C; Time is about 45-55 minute;
(4) passivation, sealing of hole.
CN201510937160.3A 2015-12-16 2015-12-16 A kind of Zinc alloy slide fastener sprocket Active CN105455321B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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