CN104087985A - Copper coating method of metal part - Google Patents
Copper coating method of metal part Download PDFInfo
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- CN104087985A CN104087985A CN201410289015.4A CN201410289015A CN104087985A CN 104087985 A CN104087985 A CN 104087985A CN 201410289015 A CN201410289015 A CN 201410289015A CN 104087985 A CN104087985 A CN 104087985A
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Abstract
The invention discloses a copper coating method of a metal part. The copper coating method comprises the following steps: preprocessing the metal part, processing through acidic and alkaline solutions, activating the metal surface, and electroplating by controlling alternative change of current density. According to the method, the surface coating thickness of an obtained product is uniform, the quality of the product is high, the pollution is low, an environment is protected, and the application prospect is very good.
Description
Technical field
The present invention relates to a kind of electric plating method, particularly a kind of metalwork copper electroplating method.
Background technology
In modern industry is produced, Metal plating is applied widely by people, in electroplating industry cyanide copper plating process, production process must be used prussiate cyanide copper plating process, exist the prussiate of hypertoxicity, its environmental pollution is extremely serious, causes serious threat to workman is healthy; Along with the enhancing of people's environmental consciousness, the copper-plating technique of an urgent demand development environment-protecting clean, substitutes traditional cyanide copper plating technique.And in existing electro-coppering, adopt constant current density to electroplate, what current density directly affected is exactly coating deposition rate, and current density is large, sedimentation velocity is fast, otherwise slow, but current density large after, coating can be more coarse, even can burn, and affects outward appearance and antiseptic property.Therefore how to improve electroplating efficiency and improve electroplating quality and become a very large problem.
Summary of the invention
For addressing the above problem, the invention discloses a kind of metalwork copper electroplating method.
In order to achieve the above object, the invention provides following technical scheme: a kind of metalwork copper coating, comprises the steps:
(1), metalwork is carried out to ultrasonic wave except cured processing;
(2), metalwork is immersed and goes to soak 5-8min in the alkaline cleaning fluid of PH 10-12, and carry out electrolysis treatment, cathode current density is 3-5 A/dm2, carries out surface cleaning, removes surperficial greasy dirt, after electrolysis, rinses with deionized water;
(3), metalwork is immersed in acid solvent and cleaned, remove its surperficial oxide film, after pickling, metalwork is put into deionized water and clean up;
(4), will carry out activation treatment through step 3 metalwork after treatment, after being disposed, rinse well with deionized water again;
(5), metalwork is put into electroplating solution to be electroplated, described electroplating solution comprises following composition: concentration is 120 g/L-240 g/L copper sulfate, concentration is 320 g/L-400 g/L ventilation breathers, concentration is the thionamic acid sodium of 15 g/L-25 g/L, concentration is the Sunmorl N 60S of 20 g/L, concentration is the sodium sulfate of 20 g/L, the mixing solutions of SODIUMNITRATE, described solution temperature is 45-75 DEG C, the density of electric current is to replace between 4-8 A/dm2 and 25-40A/dm2, wherein the time between low current and high electric current is than being 1:2-2:3, electric current alternate frequency is 10-15 time, electroplating time is 15min-20min,
(6), the metalwork having plated in step 5 is passed through through in the sodium hydroxide solution of 4%-6%;
(7), by the metalwork deionized water rinsing in step 6;
(8), the metalwork in step 7 is sent in the baking oven of vacuum and is dried, the temperature of baking oven is controlled at 280-300 DEG C.
As a modification of the present invention, the concentration ratio between described copper sulfate and described ventilation breather is 2:3-3:4.
As a modification of the present invention, the acid solvent in described step 3 be the mixture of rare nitric acid and dilute sulphuric acid, wherein the concentration ratio between rare nitric acid and dilute sulphuric acid is 1:1-1:2.
As a modification of the present invention, the step of in step 4, metalwork being carried out to activation treatment is for to put into stearic acid by metalwork, in the mixing solutions of Sodium dodecylbenzene sulfonate, soak, wherein soak time is 3-6min, described stearic acid, the concentration ratio of Sodium dodecylbenzene sulfonate is 1:2-2:3.
A kind of metalwork copper electroplating method provided by the invention; with low cost, and environmental protection, minimizing that can be to a great extent industrial pollution; protect environment; and operation steps is simple, copper-plated efficiency is high, and the nickel dam of the copper-plated product obtaining is even; corrosion-resistant, wearability; coating surface is smooth, is difficult for cracking, and has wide market outlook.
Embodiment
Below with reference to specific embodiment, technical scheme provided by the invention is elaborated, should understands following embodiment and only be not used in and limit the scope of the invention for the present invention is described.
Embodiment 1:
A kind of metalwork copper coating, comprises the steps:
(1), metalwork is carried out to ultrasonic wave except cured processing;
(2), metalwork is immersed and goes to soak 5-8min in the alkaline cleaning fluid of PH 10, and carry out electrolysis treatment, cathode current density is 3 A/dm2, carries out surface cleaning, removes surperficial greasy dirt, after electrolysis, rinses with deionized water;
(3), metalwork is immersed in the acid solvent that the concentration ratio between rare nitric acid and dilute sulphuric acid is 1:1 and cleaned, remove its surperficial oxide film, after pickling, metalwork is put into deionized water and clean up;
(4), will put into stearic acid through step 3 metalwork after treatment, in the mixing solutions of Sodium dodecylbenzene sulfonate, soak, wherein soak time is 3-6min, carry out activation treatment, wherein stearic acid, the concentration ratio of Sodium dodecylbenzene sulfonate is 1:2-2:3, after being disposed, rinses well with deionized water again;
(5), metalwork being put into electroplating solution electroplates, described electroplating solution comprises following composition: concentration is that 220 g/L copper sulfate, concentration are that 330 g/L ventilation breathers, concentration are that thionamic acid sodium, the concentration of 15 g/L is the Sunmorl N 60S of 20 g/L, concentration is the sodium sulfate of 20 g/L, the mixing solutions of SODIUMNITRATE, described solution temperature is 45 DEG C, the density of electric current is to replace between 4 A/dm2 and 25A/dm2, wherein the time between low current and high electric current is than being 1:2, electric current alternate frequency is 10 times, and electroplating time is 15min;
(6), by the metalwork having plated in step 5 through passing through in 4% sodium hydroxide solution;
(7), by the metalwork deionized water rinsing in step 6;
(8), the metalwork in step 7 is sent in the baking oven of vacuum and is dried, the temperature of baking oven is controlled at 280 DEG C.
Embodiment 2:
A kind of metalwork copper coating, comprises the steps:
(1), metalwork is carried out to ultrasonic wave except cured processing;
(2), metalwork is immersed and goes to soak 6min in the alkaline cleaning fluid of PH 10, and carry out electrolysis treatment, cathode current density is 4A/dm2, carries out surface cleaning, removes surperficial greasy dirt, after electrolysis, rinses with deionized water;
(3), metalwork is immersed in the acid solvent that the concentration ratio between rare nitric acid and dilute sulphuric acid is 1:1.5 and cleaned, remove its surperficial oxide film, after pickling, metalwork is put into deionized water and clean up;
(4), will put into stearic acid through step 3 metalwork after treatment, in the mixing solutions of Sodium dodecylbenzene sulfonate, soak, wherein soak time is 5min, carry out activation treatment, wherein stearic acid, the concentration ratio of Sodium dodecylbenzene sulfonate is 3:5, after being disposed, rinses well with deionized water again;
(5), metalwork being put into electroplating solution electroplates, described electroplating solution comprises following composition: concentration is that 230 g/L copper sulfate, concentration are that thionamic acid sodium, the concentration that 330 g/L ventilation breathers, concentration are 20g/L is the Sunmorl N 60S of 20 g/L, concentration is the sodium sulfate of 20 g/L, the mixing solutions of SODIUMNITRATE, described solution temperature is 55 DEG C, the density of electric current is to replace between 6 A/dm2 and 30A/dm2, wherein the time between low current and high electric current is than being 3:5, electric current alternate frequency is 12 times, and electroplating time is 18min;
(6), by the metalwork having plated in step 5 through passing through in 5% sodium hydroxide solution;
(7), by the metalwork deionized water rinsing in step 6;
(8), the metalwork in step 7 is sent in the baking oven of vacuum and is dried, the temperature of baking oven is controlled at 290 DEG C.
Embodiment 3:
A kind of metalwork copper coating, comprises the steps:
(1), metalwork is carried out to ultrasonic wave except cured processing;
(2), metalwork is immersed and goes to soak 8min in the alkaline cleaning fluid of PH 12, and carry out electrolysis treatment, cathode current density is 5 A/dm2, carries out surface cleaning, removes surperficial greasy dirt, after electrolysis, rinses with deionized water;
(3), metalwork is immersed in the acid solvent that the concentration ratio between rare nitric acid and dilute sulphuric acid is 1:2 and cleaned, remove its surperficial oxide film, after pickling, metalwork is put into deionized water and clean up;
(4), will carry out activation treatment through step 3 metalwork after treatment, after being disposed, rinse well with deionized water again;
(5), metalwork being put into electroplating solution electroplates, described electroplating solution comprises following composition: concentration is that 120 240 g/L copper sulfate, concentration are that 320 g/L ventilation breathers, concentration are that thionamic acid sodium, the concentration of 25 g/L is the Sunmorl N 60S of 20 g/L, concentration is the sodium sulfate of 20 g/L, the mixing solutions of SODIUMNITRATE, described solution temperature is 75 DEG C, the density of electric current is to replace between 8 A/dm2 and 40A/dm2, wherein the time between low current and high electric current is than being 2:3, electric current alternate frequency is 15 times, and electroplating time is 20min;
(6), by the metalwork having plated in step 5 through passing through in 6% sodium hydroxide solution;
(7), by the metalwork deionized water rinsing in step 6;
(8), the metalwork in step 7 is sent in the baking oven of vacuum and is dried, the temperature of baking oven is controlled at 300 DEG C.
The coating making through embodiment 1 to 3, copper layer does not have bubbling or comes off after tested, and copper layer and substrate combinating strength are qualified.
A kind of metalwork copper electroplating method provided by the invention; with low cost, and environmental protection, minimizing that can be to a great extent industrial pollution; protect environment; and operation steps is simple, copper-plated efficiency is high, and the nickel dam of the copper-plated product obtaining is even; corrosion-resistant, wearability; coating surface is smooth, is difficult for cracking, and has wide market outlook.
The disclosed technique means of the present invention program is not limited only to the disclosed technique means of above-mentioned embodiment, also comprises the technical scheme being made up of above technical characterictic arbitrary combination.
Claims (4)
1. a metalwork copper coating, is characterized in that: comprise the steps:
(1), metalwork is carried out to ultrasonic wave except cured processing;
(2), metalwork is immersed and goes to soak 5-8min in the alkaline cleaning fluid of PH 10-12, and carry out electrolysis treatment, cathode current density is 3-5 A/dm2, carries out surface cleaning, removes surperficial greasy dirt, after electrolysis, rinses with deionized water;
(3), metalwork is immersed in acid solvent and cleaned, remove its surperficial oxide film, after pickling, metalwork is put into deionized water and clean up;
(4), will carry out activation treatment through step 3 metalwork after treatment, after being disposed, rinse well with deionized water again;
(5), metalwork is put into electroplating solution to be electroplated, described electroplating solution comprises following composition: concentration is 120 g/L-240 g/L copper sulfate, concentration is 320 g/L-400 g/L ventilation breathers, concentration is the thionamic acid sodium of 15 g/L-25 g/L, concentration is the Sunmorl N 60S of 20 g/L, concentration is the sodium sulfate of 20 g/L, the mixing solutions of SODIUMNITRATE, described solution temperature is 45-75 DEG C, the density of electric current is to replace between 4-8 A/dm2 and 25-40A/dm2, wherein the time between low current and high electric current is than being 1:2-2:3, electric current alternate frequency is 10-15 time, electroplating time is 15min-20min,
(6), the metalwork having plated in step 5 is passed through through in the sodium hydroxide solution of 4%-6%;
(7), by the metalwork deionized water rinsing in step 6;
(8), the metalwork in step 7 is sent in the baking oven of vacuum and is dried, the temperature of baking oven is controlled at 280-300 DEG C.
2. a kind of metalwork copper coating according to claim 1, is characterized in that: the concentration ratio between described copper sulfate and described ventilation breather is 2:3-3:4.
3. a kind of metalwork copper coating according to claim 1, is characterized in that: the mixture for rare nitric acid and dilute sulphuric acid of the acid solvent in described step 3, wherein the concentration ratio between rare nitric acid and dilute sulphuric acid is 1:1-1:2.
4. a kind of metalwork copper coating according to claim 1, it is characterized in that: the step of in step 4, metalwork being carried out to activation treatment is for to put into stearic acid by metalwork, in the mixing solutions of Sodium dodecylbenzene sulfonate, soak, wherein soak time is 3-6min, described stearic acid, the concentration ratio of Sodium dodecylbenzene sulfonate is 1:2-2:3.
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| CN201410289015.4A CN104087985A (en) | 2014-06-25 | 2014-06-25 | Copper coating method of metal part |
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| CN201410289015.4A CN104087985A (en) | 2014-06-25 | 2014-06-25 | Copper coating method of metal part |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740146A (en) * | 2017-10-27 | 2018-02-27 | 桐城运城制版有限公司 | A kind of intaglio plate copper plating additive |
| CN111041535A (en) * | 2019-12-25 | 2020-04-21 | 浙江振有电子股份有限公司 | Method for continuously and movably electroplating through hole double-sided board |
| CN115198321A (en) * | 2022-08-22 | 2022-10-18 | 广东盈华电子科技有限公司 | Production process of double-light copper foil for lithium battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740146A (en) * | 2017-10-27 | 2018-02-27 | 桐城运城制版有限公司 | A kind of intaglio plate copper plating additive |
| CN111041535A (en) * | 2019-12-25 | 2020-04-21 | 浙江振有电子股份有限公司 | Method for continuously and movably electroplating through hole double-sided board |
| CN115198321A (en) * | 2022-08-22 | 2022-10-18 | 广东盈华电子科技有限公司 | Production process of double-light copper foil for lithium battery |
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