CN102758228A - Sulfonic acid type semi-bright pure tin electroplating solution - Google Patents

Sulfonic acid type semi-bright pure tin electroplating solution Download PDF

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CN102758228A
CN102758228A CN2012102435047A CN201210243504A CN102758228A CN 102758228 A CN102758228 A CN 102758228A CN 2012102435047 A CN2012102435047 A CN 2012102435047A CN 201210243504 A CN201210243504 A CN 201210243504A CN 102758228 A CN102758228 A CN 102758228A
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sulfonic acid
pure tin
acid type
tin
electroplate liquid
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CN2012102435047A
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CN102758228B (en
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刘迪
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SHENZHEN HUA'AO WATCH SURFACE TECHNIC CO Ltd
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SHENZHEN HUA'AO WATCH SURFACE TECHNIC CO Ltd
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Abstract

The invention discloses a sulfonic acid type semi-bright pure tin electroplating solution. The sulfonic acid type semi-bright pure tin electroplating solution comprises the following components: 60-150 g/L of alkyl sulfonic acid, 150-280 g/L of tin alkyl sulfate, 0.1-10 g/L of brightening agent, 0.5-10 g/L of stabilizer, 1.0-20 g/L of wetting agent and 0.1-6 g/L of grain refiner. According to the sulfonic acid type semi-bright pure tin electroplating solution disclosed by the invention, the tin alkyl sulfate is adopted as main salt and cooperated with the other components, so that the components in the tin electroplating solution have good dispersity, and the hydrolysis of tin ions and the oxidization of the brightening agent and the like are effectively avoided; the sulfonic acid type semi-bright pure tin electroplating solution guarantees that the semi-bright pure tin electroplating solution has the advantages of clearness and transparency, high stability, good compatibility, high generality, safety and environmental friendliness; the plating solution is high in current efficiency and fast in plating speed; and the obtained pure tin-plated layer has fine crystallization, uniform matte degree and excellent performance.

Description

A kind of sulfonic acid type half bright pure tin electroplate liquid
Technical field
The invention belongs to technical field of surface, concrete a kind of sulfonic acid type half bright pure tin electroplate liquid that relates to.
Background technology
The tin coating good stability, corrosion-resistant, anti-tarnishing ability is strong, coating is nontoxic, soft, and good weldability and ductility are arranged, and therefore in industry, is widely used.In order to prevent operation or user of service's eyestrain, current trend adopts coating and the surface decoration tech that hangs down reflective or no-reflection.Different with bright tin plating, this type is zinc-plated to be called half bright tin plating, or mute light tin plating technique, and its gained coating is called as half bright tin or mute tin, mist tin.Half bright tin plating additive is single simple, and plating bath is manageable, and the crystallization of ability refinement coating improves dispersive ability, but do not make coating produce light.This technology helps improving coating adhesion and compactness, on assembling line, has reduced the luminous reflectance pollution simultaneously.On unicircuit, printed wiring version, electronic devices and components, all be widely used.For reaching the effect of half bright coating, adopted tinsel coating in the past more.Along with increasingly high environmental requirement, plumbous use receives strict restriction more, thereby half light plating pure tin technology will become main selection.
With respect to sophisticated electroplating bright pure tin is technological day by day, actually rare about the technology and the document of half light plating pure tin.What be used for half bright pure tin technology at present is mainly the acid tin plating technique of sulfate-type plating bath; Promptly in the composition that with sulfuric acid and stannous sulfate is basic plating bath, add the mute zinc-plated additive of light, its principal feature plating bath current efficiency is high, and is easy and simple to handle; But coating is easy to long whisker; The internal stress of coating is restive, and bath stability is relatively poor, needs often to handle.The domestic half bright acid tin plating electrolyte that discloses a kind of based on sulfuric acid system is characterized in that each additive amount significantly reduces, and has reduced cost recently; But binder component is too much, and plating bath is wayward, and stability fails to improve.Being used for half bright pure tin technology also has methylsulphonic acid system and fluoroboric acid system zinc-plated etc. except that the acid tin plating technique of vitriol type plating bath.Fluoroborate tin plating electrolyte cost is higher than sulfate bath, also exists the shortcomings such as pollution of fluorochemical, is used hardly at present.The methylsulphonic acid system is high with its sedimentation rate, and waste water is advantage such as processings and being applied in the continuous electroplating production easily, but the dispersive ability of most of plating baths of current application is poor, the Bivalent Tin facile hydrolysis.The recently domestic half bright pure tin electroplate liquid that discloses a kind of based on the sulfonic acid system is characterized in and can under the weak acid scope, operates that the pH value is between 0.5 – 6.5; Bath stability and coating performance are good, but exist owing to service temperature and the low relatively low defective of plating speed that causes of current density.
Therefore, be necessary to strengthen the research of double bright pure tin electroplate liquid and technology thereof, develop a kind of electroplate liquid of stability and high efficiency, to satisfy the demand in practical application and market.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art, provide the sulfonic acid type that a kind of dispersive ability is strong, stable, efficient, gained pure tin coating performance is excellent half bright pure tin electroplate liquid.
In order to realize the foregoing invention purpose, technical scheme of the present invention is following:
A kind of sulfonic acid type half bright pure tin electroplate liquid comprises following recipe ingredient:
It is main salt that sulfonic acid type of the present invention half bright pure tin electroplate liquid adopts the inferior tin of alkylsulphonic acid, under the synergy of components such as brightening agent, stablizer, alkylsulphonic acid, wetting agent, grain-refining agent, makes this tin bath solution have following beneficial effect:
1. do not contain fluoroborate and heavy metals such as lead, bismuth, cerium, also do not contain formaldehyde and inflammable substance, the discarded liquid processing cost after the plating is low, environmentally safe, safety, environmental protection;
2. each component good dispersivity in this sulfonic acid type half bright pure tin electroplate liquid; Coordinative role through each component; Effectively avoided the oxidation of the component such as hydrolysis and brightening agent of stannous ion; Guaranteed that this sulfonic acid type half bright pure tin electroplate liquid is limpid transparent, stability is high, has effectively overcome the deficiency that exists in the tin bath solution that existing acid tin plating technique adopted;
3. this sulfonic acid type half bright pure tin electroplate liquid consistency is good, highly versatile;
4. when this sulfonic acid type half bright pure tin electroplate liquid being electroplated; Sedimentation velocity is fast; Production efficiency is high, and in the current density range from the height district to low district broadness, all can obtain half consistent bright pure tin coating of outward appearance; And crystallization is careful in the tin electrolytic coating; The tin electrolytic coating is even, and it has excellent solidity to corrosion, resistance toner and weldability, electronics electroplating industry fields such as the rolling of the connector of particularly suitable electronic apparatus, terminal and IC and semi-conductor discrete device, the mute matte pure tin coating of rack plating.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the present invention will be solved, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The embodiment of the invention provides that a kind of dispersive ability is strong, stability and high efficiency, the excellent sulfonic acid type half bright pure tin electroplate liquid of gained pure tin coating performance.This sulfonic acid type half bright pure tin electroplate liquid comprises following recipe ingredient:
Like this; It is main salt that the foregoing description sulfonic acid type half bright pure tin electroplate liquid adopts the inferior tin of alkylsulphonic acid; Under the synergy of components such as brightening agent, stablizer, alkylsulphonic acid, wetting agent, grain-refining agent, each component good dispersivity in the sulfonic acid type half bright pure tin electroplate liquid is through the coordinative role of each component; Effectively avoided the oxidation of the component such as hydrolysis and brightening agent of stannous ion; Guaranteed that this sulfonic acid type half bright pure tin electroplate liquid is limpid transparent, stability is high, has effectively overcome the deficiency that exists in the tin bath solution that existing acid tin plating technique adopted.Simultaneously, this sulfonic acid type half bright pure tin electroplate liquid consistency is good, highly versatile.In addition, this sulfonic acid type half bright pure tin electroplate liquid does not contain fluoroborate and lead, does not contain formaldehyde and inflammable substance yet, and the discarded liquid processing cost after the plating is low, environmentally safe, safety, environmental protection.When making this sulfonic acid type half bright pure tin electroplate liquid mute the tin plating, sedimentation velocity is fast, and production efficiency is high, and distinguishes in the broad current density range like 10~100A/dm from the height district to low 2All can obtain half consistent bright pure tin coating of outward appearance; And crystallization is careful in the tin electrolytic coating; The tin electrolytic coating is even, and it has excellent solidity to corrosion, resistance toner and weldability, electronics electroplating industry fields such as the rolling of the connector of particularly suitable electronic apparatus, terminal and IC and semi-conductor discrete device, the mute matte pure tin coating of rack plating.
Particularly, among the embodiment of above-mentioned half bright pure tin plating solution formula, the alkylsulphonic acid component is that sulfonic acid type half bright pure tin electroplate liquid provides sour environment, plays solvent and electrolytical effect.The contriver finds that under study for action the stability and the electroconductibility of this alkylsulphonic acid component concentrations and kind p-sulfonic acid type half bright pure tin electroplate liquid have material impact.Therefore; When alkylsulphonic acid concentration was 60~150g/L, alkylsulphonic acid was preferably when one or both are composite in methylsulphonic acid, the ethylsulfonic acid, and this alkylsulphonic acid can make other components dissolve fully; The stability of the sulfonic acid type of being prepared half bright pure tin electroplate liquid is best, and electroconductibility is stronger.
The inferior tin of abovementioned alkyl sulfonic acid is preferably stannous methanesulfonate or/and the inferior tin of ethylsulfonic acid, and its content is preferably 180~230g/L.The inferior tin of this preferred alkylsulphonic acid can better ionization go out stannous ion, when electroplating, can also stablize the stable of stannous ion content in the sulfonic acid type half bright pure tin electroplate liquid, reduces the frequency of when electroplating the inferior tin component of alkylsulphonic acid being replenished.Further improve coating uniformity simultaneously, and make coating have good weldability and ductility.In addition, in electroplating process,, therefore, need suitably replenish the inferior tin component of this alkyl sulfonic acid, guarantee the stannous ion concentration in this sulfonic acid type half bright pure tin electroplate liquid based on situation because along with the carrying out of electroplating, the content of stannous ion can decrease.
Above-mentioned brightening agent is preferably a kind of β-Nai Fen ethoxylate, and like the LugalvanBNO-12 of BASF AG, its preferred content is 2~6g/L.As far as existing tin bath solution, brightening agent can make the tin coating light.This area brightener commonly used generally is made up of the organism of aldehyde, phenol and so on and the tensio-active agent of solubilising etc.But the contriver finds that under study for action such existing brightener content can reduce cathode efficiency too much, and the too much oxidation of brightener in plating bath simultaneously can be quickened the muddiness of tin plating electrolyte again.The preferred β-Nai Fen ethoxylate of contriver brightening agent; Particularly BNO-12 and preferred content can effectively overcome the deficiency that existing brightening agent exists; Guarantee that the foregoing description sulfonic acid type half bright pure tin electroplate liquid keeps very high cathode efficiency when electroplating; And prevent that high Current Zone from burning, increase covering power; Avoid the oxidation of himself simultaneously, guarantee the limpid transparent of this sulfonic acid type half bright pure tin electroplate liquid.And the inferior tin master of the brightening agent of this preferred content and kind and alkylsulphonic acid salt system acts synergistically, and can also obtain half bright pure tin coating of uniformity.
The aforementioned stable agent is preferably Resorcinol, and preferred content is 0.8 ~ 3g/L.Concerning tin bath solution; Stablizer can make each component be uniformly dispersed; Guarantee the stability of this electroplate liquid; Existing stablizer mainly is the mixture of complexing agent, oxidation inhibitor and reductive agent; Like Yi Yansuan, ferrous sulfate etc., but such existing stablizer can not well prevent the stannous stannous ion hydrolysis of alkylsulphonic acid in the foregoing description sulfonic acid type half bright pure tin electroplate liquid, and the stannous ion that can cause the inferior tin ionization of alkylsulphonic acid in the present embodiment to go out like this is milky turbidity because of hydrolysis causes electroplate liquid.Therefore, this preferred Resorcinol stablizer on the finely dispersed basis of each component, can also effectively prevent the stannous ion hydrolysis in guaranteeing the foregoing description sulfonic acid type half bright pure tin electroplate liquid, guarantee the limpid transparent of this electroplate liquid.In electroplating process particularly, stablizer can could keep the stability of acid bright tinning solution with the taking out of and need in time to replenish of plating bath.
Above-mentioned wetting agent is preferably polyoxyethylene nonylphenol NP series, and like non-ionics such as NP-10 to NP-20, wherein, wetting agent is preferably NP-12, and preferred content is 1.5 ~ 6.0g/L.This wetting agent plays the solvent and the effect of carrier of component such as brightening agent in this sulfonic acid type half bright pure tin electroplate liquid, thereby has guaranteed that electroplate liquid is stable and limpid transparent, has improved the cathode efficiency of electroplate liquid.
Above-mentioned grain-refining agent is preferably the coconut fatty alcohols Soxylat A 25-7, and like the GENAPOL C-050 that Clariant company produces, preferred content is 0.5 ~ 3.0g/L.This preferred coconut fatty alcohols Soxylat A 25-7; Particularly GENAPOL C-050 can improve the dispersive ability of this sulfonic acid type half bright each component of pure tin electroplate liquid; Make grain refining in the tin layer, the tin layer is even, thereby guarantees mute uniformly luminosity of pure tin coating and good performance.
Using embodiment of the invention sulfonic acid type half bright pure tin electroplate liquid preparation steps is: in the aqueous solution of alkylsulphonic acid, add brightening agent, wetting agent, grain-refining agent and stablizer successively to dissolving fully; Add the inferior tin of alkylsulphonic acid then, make each component mix.In addition, before plating bath is opened cylinder, preferred 10% methylsulphonic acid diafiltration coating bath, filtration pump, anode and the anode of adopting earlier, water flushing then thoroughly cleans up with deionized water again.
For the present invention is further elaborated, more preferred instances are following:
Embodiment 1
A kind of sulfonic acid type half bright pure tin electroplate liquid comprises following recipe ingredient:
This sulfonic acid type half bright pure tin electroplate liquid open cylinder:
1. with 10% methylsulphonic acid diafiltration coating bath, filtration pump, anode and anode, water flushing then thoroughly cleans up with deionized water again; Add deionized water to cell body long-pending 25%;
2. add required alkylsulphonic acid while stirring;
3. add brightening agent, wetting agent, grain-refining agent and stablizer successively to dissolving fully while stirring;
4. add stannous methanesulfonate while stirring;
5. add deionized water to final volume.
The above-mentioned sulfonic acid type half bright pure tin electroplate liquid of opening cylinder was electroplated on copper sheet 2 minutes according to the electroplating operations method, and the plating condition is current density 10A/dm 2, 40~45 ℃ of temperature.The result plates the pure tin coating that 10.5um is evenly mute light on copper sheet.
Embodiment 2
A kind of sulfonic acid type half bright pure tin electroplate liquid comprises following recipe ingredient:
The cylinder method of opening of this sulfonic acid type half bright pure tin electroplate liquid is with reference to embodiment 1.
The above-mentioned sulfonic acid type half bright pure tin electroplate liquid of opening cylinder was electroplated on copper sheet 1 minute according to the electroplating operations method, and the plating condition is current density 30A/dm 2, 40~45 ℃ of temperature.The result plates the pure tin coating that is evenly mute light of 15um on copper sheet.
Embodiment 3
A kind of sulfonic acid type half bright pure tin electroplate liquid comprises following recipe ingredient:
The cylinder method of opening of this sulfonic acid type half bright pure tin electroplate liquid is with reference to embodiment 1.
The above-mentioned sulfonic acid type half bright pure tin electroplate liquid of opening cylinder was electroplated on copper sheet 0.5 minute according to the electroplating operations method, and the plating condition is current density 50A/dm 2, 40~45 ℃ of temperature.The result plates the pure tin coating that is evenly mute light of 13.5um on copper sheet.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a sulfonic acid type half bright pure tin electroplate liquid comprises following recipe ingredient:
2. sulfonic acid type according to claim 1 half bright pure tin electroplate liquid is characterized in that: the inferior tin content of said alkylsulphonic acid is 180~230g/L.
3. sulfonic acid type according to claim 1 half bright pure tin electroplate liquid is characterized in that: said brightening agent 2~6g/L.
4. according to the arbitrary described sulfonic acid type of claim 1~3 half bright pure tin electroplate liquid, it is characterized in that: the inferior tin of said alkylsulphonic acid is that stannous methanesulfonate is or/and the inferior tin of ethylsulfonic acid.
5. according to the arbitrary described sulfonic acid type of claim 1~3 half bright pure tin electroplate liquid, it is characterized in that: said brightening agent is the β-Nai Fen ethoxylate.
6. according to the arbitrary described sulfonic acid type of claim 1~3 half bright pure tin electroplate liquid, it is characterized in that: said stablizer is a Resorcinol.
7. according to the arbitrary described sulfonic acid type of claim 1~3 half bright pure tin electroplate liquid, it is characterized in that: said wetting agent is a polyoxyethylene nonylphenol NP series.
8. sulfonic acid type according to claim 7 half bright pure tin electroplate liquid, it is characterized in that: said wetting agent is NP-12.
9. according to the arbitrary described sulfonic acid type of claim 1~3 half bright pure tin electroplate liquid, it is characterized in that: said grain-refining agent is the coconut fatty alcohols Soxylat A 25-7.
10. according to the arbitrary described sulfonic acid type of claim 1~3 half bright pure tin electroplate liquid, it is characterized in that: said alkylsulphonic acid is that methylsulphonic acid is or/and ethylsulfonic acid.
CN201210243504.7A 2012-07-13 2012-07-13 A kind of sulfonic acid type semi-bright Pure Tin Plating Process liquid Expired - Fee Related CN102758228B (en)

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Cited By (12)

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CN103240538A (en) * 2013-03-18 2013-08-14 上海术荣电子有限公司 Butt-welding terminal for wire harness connection and preparing method of butt-welding terminal
CN104060307A (en) * 2014-06-30 2014-09-24 句容市博远电子有限公司 Pure tin electroplating solution for inhibiting growth of tin whiskers and application thereof
CN105002525A (en) * 2015-08-21 2015-10-28 无锡桥阳机械制造有限公司 Semi-bright nickel plating solution
CN105063680A (en) * 2015-08-21 2015-11-18 无锡桥阳机械制造有限公司 Sulfonic acid type semi-bright pure-tin electroplating liquid
CN105063690A (en) * 2015-08-21 2015-11-18 无锡桥阳机械制造有限公司 Sn-Zn alloy electroplating liquid
CN105648483A (en) * 2016-04-11 2016-06-08 济南德锡科技有限公司 High-speed tinning solution and preparation method thereof
CN105755512A (en) * 2016-03-04 2016-07-13 昆山艾森半导体材料有限公司 Antioxidant for tin methane-sulfonate, preparation method and use method thereof
CN104562100B (en) * 2014-12-31 2016-09-07 苏州禾川化学技术服务有限公司 A kind of multi-functional half white bright tin plating additive
CN108103540A (en) * 2018-01-24 2018-06-01 永星化工(上海)有限公司 Tin alloy electric plating liquid
CN109338408A (en) * 2018-12-04 2019-02-15 中华全国供销合作总社天津再生资源研究所 A kind of electrolyte and a kind of electrorefining method of useless electronic solder
CN111197174A (en) * 2018-11-16 2020-05-26 丰田自动车株式会社 Tin solution for forming tin film and method for forming tin film using same
CN110306213B (en) * 2019-07-08 2020-08-04 广州三孚新材料科技股份有限公司 Tin plating solution for solar cell and preparation method thereof

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CN102162113A (en) * 2011-05-30 2011-08-24 长春工业大学 Tin-silver-copper ternary alloy electroplating solution and electroplating method
CN102418123A (en) * 2011-11-25 2012-04-18 上海应用技术学院 High-speed electroplating luminous tin-plating electroplating liquid as well as preparation method and application thereof

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103240538A (en) * 2013-03-18 2013-08-14 上海术荣电子有限公司 Butt-welding terminal for wire harness connection and preparing method of butt-welding terminal
CN104060307A (en) * 2014-06-30 2014-09-24 句容市博远电子有限公司 Pure tin electroplating solution for inhibiting growth of tin whiskers and application thereof
CN104562100B (en) * 2014-12-31 2016-09-07 苏州禾川化学技术服务有限公司 A kind of multi-functional half white bright tin plating additive
CN105063680A (en) * 2015-08-21 2015-11-18 无锡桥阳机械制造有限公司 Sulfonic acid type semi-bright pure-tin electroplating liquid
CN105063690A (en) * 2015-08-21 2015-11-18 无锡桥阳机械制造有限公司 Sn-Zn alloy electroplating liquid
CN105002525A (en) * 2015-08-21 2015-10-28 无锡桥阳机械制造有限公司 Semi-bright nickel plating solution
CN105755512A (en) * 2016-03-04 2016-07-13 昆山艾森半导体材料有限公司 Antioxidant for tin methane-sulfonate, preparation method and use method thereof
CN105755512B (en) * 2016-03-04 2018-01-05 昆山艾森半导体材料有限公司 A kind of tin methane sulfonate antioxidant and preparation method thereof and application method
CN105648483A (en) * 2016-04-11 2016-06-08 济南德锡科技有限公司 High-speed tinning solution and preparation method thereof
CN105648483B (en) * 2016-04-11 2018-09-18 济南德锡科技有限公司 A kind of high speed tin plating solution and preparation method thereof
CN108103540A (en) * 2018-01-24 2018-06-01 永星化工(上海)有限公司 Tin alloy electric plating liquid
CN108103540B (en) * 2018-01-24 2020-01-07 永星化工(上海)有限公司 Tin alloy electroplating solution
CN111197174A (en) * 2018-11-16 2020-05-26 丰田自动车株式会社 Tin solution for forming tin film and method for forming tin film using same
CN109338408A (en) * 2018-12-04 2019-02-15 中华全国供销合作总社天津再生资源研究所 A kind of electrolyte and a kind of electrorefining method of useless electronic solder
CN110306213B (en) * 2019-07-08 2020-08-04 广州三孚新材料科技股份有限公司 Tin plating solution for solar cell and preparation method thereof

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