CN101760767B - Method for electroplating steel strip with nickel - Google Patents
Method for electroplating steel strip with nickel Download PDFInfo
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- CN101760767B CN101760767B CN2009103108197A CN200910310819A CN101760767B CN 101760767 B CN101760767 B CN 101760767B CN 2009103108197 A CN2009103108197 A CN 2009103108197A CN 200910310819 A CN200910310819 A CN 200910310819A CN 101760767 B CN101760767 B CN 101760767B
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- steel strip
- nickel
- electroplating
- anode
- electroplating steel
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Abstract
The invention relates to a method for electroplating steel strip with nickel, particularly for continuously electroplating perforated steel strip or punched steep strip used for manufacturing the electrode with nickel, aiming at solving the technical problem that the fast electroplated coating is not fine and smooth. Electroplating solution comprises NiSO4.7H2O of being more than 350 g/L and less than or equal to 550 g/L, 20-50 g/L of H3BO3, 5-30 g/L of anodal active agent and 0.2-0.8 g/L of lauryl sodium sulfate. The method for continuously electroplating steel strip with nickel has low cost and good cathodic reduction effect and ensures the fast electroplating speed and the fine and smooth electroplated coating.
Description
Technical field
The present invention relates to a kind of method for electroplating steel strip with nickel, and be specially adapted to the perforated steel ribbon of electrode manufacturing usefulness, the continuous electric nickel plating of Punching steel strip.
Background technology
The power supply manufacturing is extensive use of the perforated steel ribbon of thickness below 0.2mm, Punching steel strip as electrode connecting parts or skeleton, and nickel plating thickness is 0.5～5 μ m, and existing making method is to adopt nickel sulfamic acid to electroplate.The galvanized prescription of nickel sulfamic acid: nickel sulfamic acid 300～450g/L, nickelous chloride 0～15g/L, boric acid 30～45g/L.The galvanized characteristics of nickel sulfamic acid are that the stress of coating is lower.Be usually used in functional nickel plating, but its cost is higher relatively.It is the relatively low method of cost that single nickel salt is electroplated.By present price, single nickel salt is 31～32 yuan/Kg, and the price of nickel sulfamic acid is 70～80 yuan/Kg.
But single nickel salt is NiSO in the electroplating technology of main salt in the prior art
47H
2O content mostly is 100～350g/L greatly.[" electroplate handbook, national defence press, in July, 1997 version, P314-315] disclosed solution composition and working conditions be: single nickel salt NiSO
47H
2O 150-250g/L, sodium chloride nacl 10-11g/L, boric acid 30～35g/L, sodium sulfate Na
2SO
420～30g/L, Sodium Fluoride NaF 4g/L, sal epsom MgSO
47H
2O 30～40g/L, sodium lauryl sulphate 0.05～0.1g/L.PH value 5.0～5.5,20～35 ℃ of temperature.Nickel sulfate content is generally 100～300g/L.Content is limit on the lower side, and solution dispersibility is good, and the coating crystallization is careful, but sedimentation velocity is slow, and cathode efficiency is low.When nickel sulfate content is high, allow current density height, sedimentation velocity fast.Too high levels, dispersive ability difference and production energy consumption are big.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method of plating the careful level and smooth continuous nickel plating of steel band of the fast and coating of speed.
Technical scheme of the present invention
The electroplating solution prescription is: 350＜NiSO
47H
2O≤550g/L; 20≤H
3BO
3≤ 50g/L; 5≤anode promoting agent≤30g/L, 0.2≤sodium lauryl sulphate≤0.8g/L.
400≤NiSO preferably
47H
2O≤550g/L; 25≤H
3BO
3≤ 45g/L; 15≤anode promoting agent≤25g/L, 0.5≤sodium lauryl sulphate≤0.8g/L.
Metallic nickel has very strong passivation ability, in order to prevent the nickel anode passivation, adds the anode promoting agent, can promote anode dissolution, guarantees that the normal of nickel ion replenishes.Usually with NaCl, nickelous chloride etc., when anode nickel becomes nickel ion and leaves anode, since the existence of chlorion, very fast formation nickelous chloride, and the nickelous chloride good water solubility makes nickel ion be diffused into plating bath inside rapidly from the positive column like this, thus prevent anode passivation.But adding too much to make anode dissolution too fast.
Adding tensio-active agents such as sodium lauryl sulphate, n-octyl sodium sulfate is in order to prevent that coating from producing pin hole, to add the too much very few coating surface that all can make and grow dim.
Boric acid H
3BO
3Be buffer reagent, have the effect of stablizing the pH value, the pH value is controlled at 3.0～5.0 (preferred 3.5～4.5).But the amount of boric acid too much can cause burr and coarse.
The continuous nickel plating method of steel band may further comprise the steps:
(1) greasy dirt of removal steel strip surface.
(2) electronickelling: 60～70 ℃ of temperature, current density 8～15A/dm
2
(3) neutralization: with steel band from pH value 12～14 basic solutions by, the drying, rolling promptly.Purpose is that steel strip surface is neutralized into alkaline state, prevents corrosion in storage, the use.
The basic solution pH value 12～14 that neutralization is adopted, the too high meeting of basicity causes steel strip surface to grow dim, and the alkali mark is obvious.Cross to hang down and to cause neutralization not thorough, the easy corrosion of steel band.Can adopt the NaOH solution of 5～15g/L, or the low concentration solution of yellow soda ash, tertiary sodium phosphate.
In order to eliminate a last operation solution, avoid following operation is impacted, or influence the last visual appearance of coating, can after each operation, increase cleaning step.
The invention has the beneficial effects as follows: with single nickel salt is the electroplating solution of main salt, and cost is low, and nickel plating solution concentration is higher, can hold bigger current density, and cathodic reduction is effective, thereby plating speed is fast, and need not add conducting medium such as sal epsom in the electroplate liquid.Simultaneously, the inventive method coating is compared with existing technology, and vision is seen, and is obviously careful level and smooth.
Below the invention will be further described by embodiment, but be not limitation of the invention.
Embodiment
It is low to the invention provides a kind of cost, and sedimentation velocity is fast, the method for the careful level and smooth continuous nickel plating of steel band of coating.The concrete step of implementing is as follows:
(1) deoil: adopt all kinds of acidity or alkaline degreasing solution all can, purpose is to remove the greasy dirt of steel strip surface.
(2) water cleans, and knows the residual of degreasing solution;
(3) the anode and cathode co-electrolysis deoils;
The anode co-electrolysis deoils and adopts basic solution usually, and composition is the mixing solutions that contains sodium hydroxide, yellow soda ash, tertiary sodium phosphate: NaOH 40～60g/L, NaCO
330～60g/L, Na
3PO
412H
2O 20～30g/L, Faradaic current 2～210A/dm
-2, time 1～5min.
(4) water cleans;
(5) acid etch; Purpose is rusty stain and the oxide skin of removing by the plating piece surface;
(6) water cleans;
(7) electronickelling:
The electroplating solution prescription is: NiSO
47H
2O is greater than 350, less than 550g/L; H
3BO
320～50g/L; Muriate 15～25g/L, sodium lauryl sulphate 0.2～0.8g/L.PH value 3.0～5.0 (preferred 3.5～4.5)
Preferred scheme is: NiSO
47H
2O 400～500g/L; H
3BO
325～45g/L; NaCl 15～25/L, sodium lauryl sulphate 0.5～0.8g/L.
50～70 ℃ of electroplating temperatures, current density 8～15A/dm
2The steel band walking speed can be adjusted according to the thickness needs.Higher as required thickness, can divide a plurality of coating baths to electroplate thickening.The power supply of electroplating usefulness is a direct supply, can be common silicon rectifier, silicon-controlled rectifier, high frequency switch power etc.
(8) water cleans
(9) neutralization: steel band is passed through from basic solution.Purpose is that steel strip surface is neutralized into alkaline state, prevents corrosion in storage, the use.
(10) drying: steel band drawn in the baking oven pass through, oven dry.
(11) rolling.
Embodiment 1: electroplating thickness is 0.1mm, and width is the perforated steel ribbon of 23mm
(1) deoil: adopt all kinds of acidity or alkaline degreasing solution all can, purpose is to remove the greasy dirt of steel strip surface.
(2) water cleans;
(3) the anode and cathode co-electrolysis deoils (basic solution, composition are the mixing solutions that contains sodium hydroxide, yellow soda ash, tertiary sodium phosphate), the greasy dirt that continues away not clean up.
(4) water cleans;
(5) acid etch: sulfuric acid 200g/L solution etch.
(6) water cleans;
(7) electronickelling:
The electroplating solution prescription is: NiSO
47H
2O 380g/L; H
3BO
340g/L; NaCl 20/L, sodium lauryl sulphate 0.3g/L.PH value 3.5.
55 ℃ of temperature, current density 10A/dm
2Speed 3m/min.
(8) water cleans
(9) neutralization: steel band is passed through from 1% sodium hydroxide solution.
(10) drying: steel band drawn in 280 ℃ of baking ovens pass through, oven dry.
(11) rolling.
Product performance meet the GB9798 regulation.Coating is careful level and smooth.
Embodiment 2: electroplating thickness is 0.2mm, and width is the perforated steel ribbon of 25mm
(1) deoil: adopt all kinds of acidity or alkaline degreasing solution all can, purpose is to remove the greasy dirt of steel strip surface;
(2) water cleans;
(3) the anode and cathode co-electrolysis deoils (basic solution, composition are the mixing solutions that contains sodium hydroxide, yellow soda ash, tertiary sodium phosphate), the greasy dirt that continues away not clean up;
(4) water cleans;
(5) acid etch: sulfuric acid 250g/L solution etch.
(6) water cleans;
(7) electronickelling: the electroplating solution prescription is: NiSO
47H
2O 450g/L; H
3BO
341g/L; NaCl 18g/L, sodium lauryl sulphate 0.5g/L.PH value 3.8.
60 ℃ of temperature, current density 10A/dm
2Speed 3.5M/min.
The steel band transfer rate can will be adjusted according to thickness.Higher as required thickness, can divide a plurality of coating baths to electroplate thickening.The power supply of electroplating usefulness is a direct supply, can be common silicon rectifier, silicon-controlled rectifier, high frequency switch power etc.
(8) water cleans
(9) neutralization: steel band is passed through from 3% sodium hydroxide solution.
(10) drying: steel band drawn in 320 ℃ of baking ovens pass through, oven dry.
(11) rolling.
Product performance meet the 6B9798 regulation, and coating is careful level and smooth.
Embodiment 3: electroplating thickness is 0.1mm, and width is the Punching steel strip of 180mm
(1) deoil: adopt all kinds of acidity or alkaline degreasing solution all can, purpose is to remove the greasy dirt of steel strip surface.
(2) water cleans;
(3) anode and cathode co-electrolysis deoil (basic solution, composition are the mixing solutions that contains sodium hydroxide, yellow soda ash, tertiary sodium phosphate)
(4) water cleans;
(5) acid etch: sulfuric acid 250g/L solution etch.
(6) water cleans;
(7) electronickelling: the electroplating solution prescription is: NiSO
47H
2O 460g/L; H
3BO
345g/L; NaCl 22g/L, sodium lauryl sulphate 0.7g/L.PH value 4.2.
65 ℃ of temperature, current density 12A/dm
2Speed 4M/min.
(8) water cleans
(9) neutralization: steel band is passed through from 3% sodium hydroxide solution.
(10) drying: steel band drawn in 320 ℃ of baking ovens pass through, oven dry.
(11) rolling.
Product performance meet the GB9798 regulation, and coating is careful level and smooth.
Claims (8)
1. method for electroplating steel strip with nickel, it is characterized in that: plating solution formula is: 380≤NiSO
47H
2O≤550g/L; 20≤H
3BO
3≤ 50g/L; 5≤anode promoting agent≤30g/L, 0.2≤tensio-active agent≤0.8g/L;
Described tensio-active agent is a sodium lauryl sulphate, and described anode promoting agent is NaCl.
2. method for electroplating steel strip with nickel according to claim 1 is characterized in that: described plating solution formula: 400≤NiSO
47H
2O≤550g/L; 25≤H
3BO
3≤ 45g/L; 15≤anode promoting agent≤25g/L, 0.5≤tensio-active agent≤0.8g/L.
3. method for electroplating steel strip with nickel according to claim 1 is characterized in that; The pH value of described electroplate liquid is 3.0～5.0.
4. method for electroplating steel strip with nickel according to claim 3 is characterized in that: the pH value of described electroplate liquid is 3.5～4.5.
5. according to each described method for electroplating steel strip with nickel of claim 1～4, it is characterized in that: by following steps:
(1) greasy dirt of removal steel strip surface;
(2) electronickelling: 50～70 ℃ of temperature, current density 8～15A/dm
2
(3) neutralization: steel band is passed through from the basic solution of pH value 12～14, and drying, rolling are promptly.
6. method for electroplating steel strip with nickel according to claim 5 is characterized in that: the greasy dirt that step (1) is removed steel strip surface adopts following method:
(a) deoil: adopt all kinds of acidity or alkaline degreasing solution to remove the greasy dirt of steel strip surface;
(b) water cleans;
(c) the anode and cathode co-electrolysis deoils;
(d) water cleans;
(e) acid etch;
(f) water cleans.
7. method for electroplating steel strip with nickel according to claim 6 is characterized in that: step (c) the anode and cathode co-electrolysis employing basic solution that deoils, composition is the mixing solutions that contains sodium hydroxide, yellow soda ash, tertiary sodium phosphate: NaOH 40～60g/L, NaCO
330～60g/L, Na
3PO
412H
2O 20～30g/L, Faradaic current 2～210A/d m
-2, time 1～5min.
8. method for electroplating steel strip with nickel according to claim 5 is characterized in that: the basic solution with employing in the step 3) is the NaOH solution of 5～15g/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103108197A CN101760767B (en) | 2009-12-03 | 2009-12-03 | Method for electroplating steel strip with nickel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103108197A CN101760767B (en) | 2009-12-03 | 2009-12-03 | Method for electroplating steel strip with nickel |
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| CN101760767B true CN101760767B (en) | 2011-09-28 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922031B (en) * | 2010-08-04 | 2012-05-30 | 四川长虹电器股份有限公司 | Double-plating steel belt and plating process |
| CN102021619B (en) * | 2010-12-10 | 2012-07-11 | 广州晋惠化工科技有限公司 | Electronickelling alloy solution for improving corrosion resistance of coating |
| CN104313601B (en) * | 2012-12-13 | 2016-09-07 | 林宾宾 | Water electrolysis polar board surface processing method |
| CN104164685B (en) * | 2014-06-11 | 2018-10-12 | 安徽长青电子机械（集团）有限公司 | A kind of method of steel plate nickel plating |
| CN104999077B (en) * | 2015-08-05 | 2017-10-31 | 北京科技大学 | A kind of high-density alloy composite granule and preparation method thereof |
| CN108642547A (en) * | 2018-05-28 | 2018-10-12 | 西南石油大学 | A kind of method that electro-deposition prepares graphene-Ni-Fe-Co alloy layers |
| CN115787014B (en) * | 2022-11-30 | 2023-10-13 | 江苏东方九天新能源材料有限公司 | Surface treatment process of nickel-plated steel strip of battery |
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