CN103060858A

CN103060858A - Tin plating electrolyte

Info

Publication number: CN103060858A
Application number: CN201210534468XA
Authority: CN
Inventors: 胡小照
Original assignee: LANGXI COUNTY JINKE METAL CO Ltd
Current assignee: LANGXI COUNTY JINKE METAL CO Ltd
Priority date: 2012-12-12
Filing date: 2012-12-12
Publication date: 2013-04-24

Abstract

The invention discloses tin plating electrolyte. The tin plating electrolyte comprises the following components 60 to 90g/L of tin methane sulfonate, 10 to 30g/L of tin sulfate, 110 to 140mg/L of p-cresolsulphonic acid, 60 to 120mg/L of sulfosalicylic acid, 30 to 50g/L of phosphinic acid, 45 to 70mg/L of 2,2-PySSPy, 15 to 25mg/L of 8-hydroxyquinoline, 20 to 30mg/L of catechins, 10 to 15g/L of 2,2-dihydroxy diethyl sulfide, 5 to 10mg/L of hexadecylpyridinium bromide, 8 to 12 g/L of dodecyl-phenol polyoxyethylene ether, 5 to 10g/L of ethylene glycol, 4 to 8g/L of benzalacetophenone, 5 to 10g/L of sodium hexametaphosphate, 4 to 8g/L of sodium dodecyl sulfate, and the balance of deionized water. According to the tin plating electrolyte, Sn2<+> can be effectively restrained to convert into Sn4 <+> in an electrolytic process by improving an electrolyte formula, and the stability of plating solution is improved; and meanwhile, the throwing power of the electrolyte is increased, and the luminance, the corrosion resistance and the welding performance of tin coatings are improved.

Description

A kind of tin plating electrolyte

Technical field

The present invention relates to a kind of electrolytic etching of metal liquid, be specifically related to a kind of tin plating electrolyte.

Background technology

At present, tin plate is Low carbon cold rolling steel sheet or the steel band that the two sides is coated with pure tin.It is with the intensity of steel and formability solidity to corrosion, weldability and attractive in appearance the rolling into one with tin, have the advantages such as nontoxic, that ductility good, solidity to corrosion is good, its rich surface is glossy, and is widely used in the industries such as medicine, light industry, automobile and household electrical appliances, is one of most popular steel product.All there is high pollution (such as fluoroborate, phenolsulfonate and halogenide etc.) in the zinc-plated industry of traditional electrical, plating bath unstable (vitriol), the shortcoming such as plating weldability is poor.

Summary of the invention

The object of the invention is to for the deficiencies in the prior art, a kind of high-performance tin plating electrolyte is provided, improve the weldability of solution stability and coating.

Technical scheme of the present invention is as follows:

Tin plating electrolyte, it is characterized in that, comprise following component: stannous methanesulfonate 60-90 g/L, stannous sulfate 10-30g/L, p-cresol sulfonic acid 110-140mg/L, sulphosalicylic acid 60-120mg/L, ortho phosphorous acid 30-50g/L, 2,2-two sulphur two pyridine 45-70mg/L, oxine 15-25mg/L, catechol 20-30mg/L, 2,2-dihydroxyl diethyl thioether 10-15g/L, brocide 5-10mg/L, dodecyl phenol polyethenoxy ether 8-12g/L, ethylene glycol 5-10g/L, benzylidene acetophenone 4-8g/L, Sodium hexametaphosphate 99 5-10g/L, sodium lauryl sulphate 4-8g/L, all the other are deionized water.

Electrolytic condition: temperature is 20-40 ℃, and the circulation of elecrolyte cycle is 45-120min, and the circulation of elecrolyte mode is bottom in and top out, cathode current density 100 ~ 160A/m2, and bath voltage 0.25 ~ 1.0V, anodic current density 100 ~ 160A/m2 is with interpole gap 80 ~ 160mm; Rise to 1.0V when bath voltage in the electrolytic process, when namely anode passivation occuring, take out positive plate and scrub or the double teeming positive plate, scrub or double teeming after positive plate return the participation electrolysis; According to the steam output of electrolytic solution, make up water in the electrolytic solution regularly is to keep each constituent concentration in the electrolytic solution.The present invention can establishment Sn in the electrolytic process by improving electrolyte prescription ²⁺Change into Sn ⁴⁺, improve solution stability; Also increase simultaneously the covering power of electrolytic solution, improved luminance brightness, corrosion resisting property and the welding property of tin coating.With traditional electrolysis liquid phase ratio, electrolytic solution of the present invention requires fairly simplely to electrolytic condition, can at short notice tin be electroplated onto on the steel plate, and electroplating velocity is fast, and production efficiency is high.

Embodiment

Embodiment 1

Tin plating electrolyte, component concentration is as follows in every liter of electrolytic solution: stannous methanesulfonate 90 g/L, stannous sulfate 30g/L, p-cresol sulfonic acid 140mg/L, sulphosalicylic acid 120mg/L, ortho phosphorous acid 50g/L, 2,2-two sulphur two pyridine 70mg/L, oxine 25mg/L, catechol 30mg/L, 2,2-dihydroxyl diethyl thioether 15g/L, brocide 10mg/L, dodecyl phenol polyethenoxy ether 12g/L, ethylene glycol 10g/L, benzylidene acetophenone 8g/L, Sodium hexametaphosphate 99 10g/L, sodium lauryl sulphate 8g/L, all the other are deionized water.

Electrolytic condition: to tin plating of the steel plate, temperature is 20-40 ℃, and the circulation of elecrolyte cycle is 45-120min, the circulation of elecrolyte mode is bottom in and top out, cathode current density 100 ~ 160A/m2, bath voltage 0.25 ~ 1.0V, anodic current density 100 ~ 160A/m2 is with interpole gap 80 ~ 160mm; Rise to 1.0V when bath voltage in the electrolytic process, when namely anode passivation occuring, take out positive plate and scrub or the double teeming positive plate, scrub or double teeming after positive plate return the participation electrolysis; According to the steam output of electrolytic solution, make up water in the electrolytic solution regularly is to keep each constituent concentration in the electrolytic solution.The tin coating surfacing is smooth on the steel plate, not long particle and exoncoma, not embrittlement, do not produce air marks; Color and luster is beautiful, and slickness equals to minute surface.

Embodiment 2

After electrolytic solution is packed electrolyzer into, by every liter of electrolytic solution, be equipped with 30-40 gram atlapulgite, the heavy bottom of electrolytic tank that places.Greatly reduced the possibility that contaminant particles in the electrolytic solution is adsorbed to zinc-plated negative plate.Improved electroplating quality.

Claims

1. tin plating electrolyte, it is characterized in that, comprise following component: stannous methanesulfonate 60-90 g/L, stannous sulfate 10-30g/L, p-cresol sulfonic acid 110-140mg/L, sulphosalicylic acid 60-120mg/L, ortho phosphorous acid 30-50g/L, 2,2-two sulphur two pyridine 45-70mg/L, oxine 15-25mg/L, catechol 20-30mg/L, 2,2-dihydroxyl diethyl thioether 10-15g/L, brocide 5-10mg/L, dodecyl phenol polyethenoxy ether 8-12g/L, ethylene glycol 5-10g/L, benzylidene acetophenone 4-8g/L, Sodium hexametaphosphate 99 5-10g/L, sodium lauryl sulphate 4-8g/L, all the other are deionized water.