CN107904629A - A kind of electrotinning additive - Google Patents
A kind of electrotinning additive Download PDFInfo
- Publication number
- CN107904629A CN107904629A CN201711403692.4A CN201711403692A CN107904629A CN 107904629 A CN107904629 A CN 107904629A CN 201711403692 A CN201711403692 A CN 201711403692A CN 107904629 A CN107904629 A CN 107904629A
- Authority
- CN
- China
- Prior art keywords
- brightener
- additive according
- electrotinning
- acid
- electrotinning additive
- Prior art date
- 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
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- 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
- C25D3/30—Electroplating: Baths therefor from solutions of tin
Abstract
The invention belongs to chemical plating stannum technical field, and in particular to a kind of electrotinning additive, is formed by following component proportioning：25 55g/l of stannous methanesulfonate, 90 140g/l of pyrovinic acid, 15 20g/l of stabilizer, 10 15g/l of brightener, 15 25g/l of polyacrylamide and aluminium polychloride, 3 8g/l of rare earth addition, remaining is deionized water.Beneficial effect using the present invention is：Plating solution property is stablized, and can keep for a long time limpid not turbid；Coating crystallization refinement, bright area is big, uniformity is good, unleaded more environmentally-friendly.
Description
Technical field
The invention belongs to chemical plating stannum technical field, and in particular to a kind of electrotinning additive.
Background technology
The Electronic Packaging and electronic circuit board of early stage is all using leypewter as solderable coating, has low-temperature welding,
With reference to power it is good, do not produce tin must the features such as.The mankind increasingly pay attention to health and environmental problem in recent years, and European countries issue in succession
Cloth RoHS instructions and WEEE instructions, Chinese Government consequently also promulgate《Electronics and IT products prevention and cure of pollution management method》,
Ask China's export primary electron product all realize it is unleaded, therefore study environment-friendly type electroplating technology it is imperative.
But in Pure Tin Plating Process there is also it is more the problem of, for example bad dispersibility, porosity be big, in atmosphere easily
Change colour, easily burn, tin plating the problems such as easily muddiness and tin one of the main divisions of the male role in traditional opera are long, influencing the corrosion resistance of product totality coating.
The content of the invention
The purpose of the present invention is overcome technical problem existing for Pure Tin Plating Process in the prior art, there is provided and one kind formula is reasonable,
Tin plating solution stability is good, the tin plating solution additive of tin-plated product corrosion resistance and good.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：
A kind of electrotinning additive, is formed by following component proportioning：Stannous methanesulfonate 25-55g/l, pyrovinic acid 90-
140g/l, stabilizer 15-20g/l, brightener 10-15g/l, polyacrylamide and aluminium polychloride 15-25g/l, rare earth addition
Agent 3-8g/l, remaining is deionized water.
Further, the stabilizer is selected in：At least one of oxalic acid, citric acid, tartaric acid.
Further, the brightener is formed by key light agent, auxiliary brightener, carrier brightener compounding.
Further, the one kind of the key light agent in benzylideneacetone, cumal, benzophenone, o-chlorobenzaldehyde.
Further, the auxiliary brightener is selected from：One kind in phenolphthalein, acrylic acid, cinnamic acid.
Further, it is selected from described in the carrier brightener：One kind in polyoxyethylene, polyethenoxy ether.
Further, the molar ratio of the polyacrylamide and aluminium polychloride is 1:1.2-1.8.
Further, the rare earth addition is selected from：One in lanthanum trichloride, neodymium trichloride, Dysprosium trioxide, erbium chloride
Kind.
Further, a kind of electrotinning additive is formed by following component proportioning：Stannous methanesulfonate 30g/l, methyl sulphur
Sour 100g/l, stabilizer 18g/l, brightener 12g/l, polyacrylamide and aluminium polychloride 20g/l, rare earth addition 5g/l,
Remaining is deionized water.
It is of the invention to be using the purpose of pyrovinic acid：Pyrovinic acid have reduce stannous ion activity, prevent its hydrolysis,
Improve the effect such as plating solution electric conductivity and anodic current efficiency.
It is of the invention to be using the purpose for compounding the brightener formed by key light agent, auxiliary brightener, carrier brightener：Key light
Agent can only play bright effect in a certain current density range, so preferable coating cannot be obtained by being used alone, but and
Auxiliary brightener is with the use of that can play cooperative effect, so that coating crystallization refinement, bright current density region are further expanded
Greatly；Add carrier brightener, the content of brightener in the plating solution can be improved using its solubilization, at the same also have wetting and
Crystallization of refinement function.
Beneficial effect using the present invention is：Plating solution property is stablized, and can keep for a long time limpid not turbid；Coating crystallization is thin
Change, bright area is big, uniformity is good, unleaded more environmentally-friendly.
Embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
A kind of electrotinning additive is formed by following component proportioning：Stannous methanesulfonate 25g/l, pyrovinic acid 90g/l, surely
Determine agent 15g/l, brightener 10g/l, polyacrylamide and aluminium polychloride 15g/l, rare earth addition 3g/l, remaining is deionization
Water, is sufficiently stirred.
Embodiment 2
A kind of electrotinning additive is formed by following component proportioning：Stannous methanesulfonate 30g/l, pyrovinic acid 100g/l,
Stabilizer 18g/l, brightener 12g/l, polyacrylamide and aluminium polychloride 20g/l, rare earth addition 5g/l, remaining for go from
Sub- water, is sufficiently stirred.
The present embodiment is preferred forms.
Embodiment 3
A kind of electrotinning additive, is formed by following component proportioning：Stannous methanesulfonate 55g/l, pyrovinic acid 140g/l,
Stabilizer 20g/l, brightener 15g/l, polyacrylamide and aluminium polychloride 25g/l, rare earth addition 8g/l, remaining for go from
Sub- water, is sufficiently stirred.
Claims (9)
1. a kind of electrotinning additive, it is characterised in that formed by following component proportioning：Stannous methanesulfonate 25-55g/l, methyl
Sulfonic acid 90-140g/l, stabilizer 15-20g/l, brightener 10-15g/l, polyacrylamide and aluminium polychloride 15-25g/l are dilute
Soil additive 3-8g/l, remaining is deionized water.
2. a kind of electrotinning additive according to claim 1, it is characterised in that the stabilizer is selected from：Oxalic acid, lemon
At least one of acid, tartaric acid.
3. a kind of electrotinning additive according to claim 1, it is characterised in that the brightener is by key light agent, fill-in light
Bright dose, carrier brightener compounding form.
4. a kind of electrotinning additive according to claim 3, it is characterised in that the key light agent is selected from：Benzylideneacetone,
One kind in cumal, benzophenone, o-chlorobenzaldehyde.
5. a kind of electrotinning additive according to claim 3, it is characterised in that the auxiliary brightener is selected from：Phenolphthalein,
One kind in acrylic acid, cinnamic acid.
6. a kind of electrotinning additive according to claim 3, it is characterised in that be selected from described in the carrier brightener：It is poly-
One kind in ethylene oxide, polyethenoxy ether.
7. a kind of electrotinning additive according to claim 1, it is characterised in that the polyacrylamide and polyaluminium
The molar ratio of aluminium is 1:1.2-1.8.
8. a kind of electrotinning additive according to claim 1, it is characterised in that the rare earth addition is selected from：Tri-chlorination
One kind in lanthanum, neodymium trichloride, Dysprosium trioxide, erbium chloride.
9. a kind of electrotinning additive according to claim 1, it is characterised in that formed by following component proportioning：Methyl sulphur
Sour stannous 30g/l, pyrovinic acid 100g/l, stabilizer 18g/l, brightener 12g/l, polyacrylamide and aluminium polychloride 20g/
L, rare earth addition 5g/l, remaining is deionized water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711403692.4A CN107904629A (en) | 2017-12-22 | 2017-12-22 | A kind of electrotinning additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711403692.4A CN107904629A (en) | 2017-12-22 | 2017-12-22 | A kind of electrotinning additive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107904629A true CN107904629A (en) | 2018-04-13 |
Family
ID=61870678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711403692.4A Pending CN107904629A (en) | 2017-12-22 | 2017-12-22 | A kind of electrotinning additive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107904629A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109355687A (en) * | 2018-10-25 | 2019-02-19 | 铜陵市超远科技有限公司 | A kind of method of high-frequency microwave plate electroplated layer preparation |
-
2017
- 2017-12-22 CN CN201711403692.4A patent/CN107904629A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109355687A (en) * | 2018-10-25 | 2019-02-19 | 铜陵市超远科技有限公司 | A kind of method of high-frequency microwave plate electroplated layer preparation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180413 |
|
| WD01 | Invention patent application deemed withdrawn after publication |