CN103938194B - A kind of chemical zincation immersion of magnesium alloy shell electroplating surface copper - Google Patents
A kind of chemical zincation immersion of magnesium alloy shell electroplating surface copper Download PDFInfo
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- CN103938194B CN103938194B CN201310218149.2A CN201310218149A CN103938194B CN 103938194 B CN103938194 B CN 103938194B CN 201310218149 A CN201310218149 A CN 201310218149A CN 103938194 B CN103938194 B CN 103938194B
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Abstract
The invention discloses the chemical zincation immersion of a kind of magnesium alloy shell electroplating surface copper, described zincate solution immersion consists of: ZnSO4·7H2O32 36g/L, Na4P2O7·10H2O160 170g/L, NaF10 12g/L, KF6 8g/L, Na2CO38 12g/L, NiSO42 3g/L, phosphatase 11 5 18g/L, surplus is water.By the adjustment to zincate solution immersion component, overcome the defect of prior art so that coating is more preferable with the adhesion of matrix.
Description
Technical field
The present invention relates to electroplating technology field, particularly relate to the chemistry leaching of a kind of magnesium alloy shell electroplating surface copper
Zinc immersion.
Background technology
The thermal diffusivity of magnesium alloy is not only high than plastics, and is better than aluminium alloy, and the thermal diffusion coefficient of magnesium alloy is 3.79
×10-5m2Ps, the thermal diffusion coefficient of aluminium alloy is 3.64 × 10-5m2Ps, and the thermal diffusion coefficient of engineering plastics
It is 0.The heating of magnesium alloy is faster than aluminium alloy with heat radiation, and engineering plastics cannot be compared especially.Magnesium alloy also has
The performance of the highest shielding electromagnetic interference, is suitable to do the shell of electronic equipment, be particularly suitable for make laptop computer,
The shell of the products such as mobile phone, palm PC, digital camera.
Magnesium alloy has the function of light durable, damping, shielding in a word, and specific strength is high, be easily recycled profit again
By, cheap feature, defence and military, transportation, optical instrument and electronics device can be widely used in
The industrial circles such as part.
The subject matter affecting magnesium alloy application is the corrosion resistance problem of magnesium alloy, owing to the current potential of magnesium is the most negative,
Corrosion resistance under certain conditions is poor, and its range of application is very limited.In order to make full use of magnesium alloy
Density is little, high specific strength and the feature of specific stiffness, and people are on the one hand constantly from alloying, heat treatment etc.
On the other hand aspect improves the corrosion resistance of magnesium alloy, and being through process for protecting surface, to seek to improve magnesium alloy resistance to
Erosion by way of.
There is much technique can form coat on magnesium and Mg alloy surface, including plating, chemical plating, conversion
Film, anodic oxidation, organic coating, vapor deposition layer etc..Simple effective method the most is through
Electrochemical method plates the metal or alloy of one layer of desired properties on magnesium and magnesium alloy substrate, i.e. electroplates.Magnesium and
The purpose of Mg alloy surface plating has two: one to be protection, and two is attractive in appearance, i.e. magnesium and Mg alloy surface has
Protecting decorative coating.Magnesium and magnesium-alloy material after plating are mainly used on the parts of high-speed moving object
And need to carry on the parts of goods and portable product, wherein first-selected application is automobile, motorcycle
And the industry such as bicycle, next to that portable type electronic product, such as notebook computer, mobile phone, walkman
Deng.
Solution magnesium and the Mg alloy surface corrosion-resistanting decoration treatment technology of comparative maturity mainly has two kinds in the world, its
One is paint spraying, and it two is metal plating.The former is the traditional method that current Mg alloy surface processes, but
Require Mg alloy surface to use under high glaze decoration, wear-resisting, heat conditions, then paint spraying then can not be expired
Foot requirement, this is accomplished by solving with the coat of metal.But magnesium alloy is extremely unstable in conventional bath solution
Fixed, magnesium alloy member cannot directly enter tank liquor and electroplates.Typically require and magnesium and Mg alloy surface are carried out pre-
Process, then can reach the purpose to magnesium alloy surface protective decoration with routine plating.
Current magnesium and magnesium alloy plating carry out the method for pretreatment and mainly use U.S. ASTM to recommend
Standard method, is the leaching zinc method of Dow company exploitation, and its pretreatment have employed leaching zinc and cyanide copper plating technique.
This technology not only complex process, and have employed poisonous cyanide.United States Patent (USP) 6068938 describes employing
After electrogalvanizing, pyrophosphate electroplating copper replaces cyanide electroplating；Domestic also have employing pyrophosphate to replace cyaniding
Thing technology；After Japan Patent 59050194 describes magnesium alloy pre-treatment, use containing silicate when copper facing
Plating solution.Uniformity, planarization and the adhesion etc. with metallic matrix of these technique electro-coppering coating above-mentioned
Aspect is the most very good.
Typically requiring dip-galvanizing before electro-coppering, this process has important impact to follow-up copper facing.
Summary of the invention
It is an object of the invention to propose the chemical zincation immersion of a kind of magnesium alloy shell electroplating surface copper, pass through
Adjustment to zincate solution immersion component, overcomes the defect of prior art so that the adhesion of coating and matrix is more
Good.
For reaching this purpose, the present invention by the following technical solutions:
A kind of chemical zincation immersion of magnesium alloy shell electroplating surface copper, described zincate solution immersion consists of:
ZnSO4·7H2O32-36g/L, Na4P2O7·10H2O160-170g/L, NaF10-12g/L, KF6-8g/L,
Na2CO38-12g/L, NiSO42-3g/L, phosphatase 11 5-18g/L, surplus is water.
Preferably, described zincate solution immersion consists of: ZnSO4·7H2O33-35g/L, Na4P2O7·10H2O163-
167g/L, NaF10.5-11.5g/L, KF6.5-7.5g/L, Na2CO39-11g/L, NiSO42.3-2.7g/L,
Phosphatase 11 6-17g/L, surplus is water.
Most preferably, described zincate solution immersion consists of: ZnSO4·7H2O34g/L, Na4P2O7·10H2O165g/L,
NaF11.0g/L, KF7.0g/L, Na2CO310g/L, NiSO42.5g/L, phosphatase 11 6.5g/L, surplus
For water.
The electroplating technology step that above-mentioned plating solution is applied can be: 1) cleans: under conditions of 65-75 DEG C,
Mg alloy castings soaks in alkali wash water 8-10min, and alkali liquor consists of sodium hydroxide 74-76g/L, phosphoric acid
Sodium 6-8g/L, surplus is water, then washes；Under conditions of 35-45 DEG C, by Mg alloy castings at winestone
Acid is soaked 40-60s, then washes；2) activation: by Mg alloy castings in activation under conditions of room temperature
Agent activates 5-15min, then washes；Activating solution consists of citric acid 165-175g/L, NaF
200-210g/L, surplus is water；3) leaching kirsite: under the conditions of 75-85 DEG C, by Mg alloy castings at zinc
Alloy immersion is soaked 10-15min；4) pre-zinc-plated, with pure zinc as anode, pre-zinc-plated temperature: 35-45 DEG C,
Electroplating time 30-40min, electric current density: 2-3A/dm2；5) electro-coppering: electroplating technology is: pH is 8-8.5,
Electric current density is 3-3.5A/dm2, temperature is 35-45 DEG C.
The present invention has the following technical effect that
The adjustment of the composition of the zincate solution of the chemical zincation before plating, lays a good foundation for copper facing, uses
After the zinc-plated rear re-plating copper of this technique, it is thus achieved that the shiny appearance of copper coating, adhesion is good, porosity is low,
And it is easy to maintenance.Covering power and the covering power of electroplating solution are excellent.After using the inventive method copper facing
Mg alloy castings can directly use can also be as follow-up nickel plating, the bottom of chromium plating.
Detailed description of the invention
Embodiment one
A kind of chemical zincation immersion of magnesium alloy shell electroplating surface copper, described zincate solution immersion consists of:
ZnSO4·7H2O32g/L, Na4P2O7·10H2O170g/L, NaF10g/L, KF8g/L, Na2CO38g/L,
NiSO43g/L, phosphatase 11 5g/L, surplus is water.
Embodiment two
A kind of chemical zincation immersion of magnesium alloy shell electroplating surface copper, described zincate solution immersion consists of:
ZnSO4·7H2O36g/L, Na4P2O7·10H2O160g/L, NaF12g/L, KF6g/L, Na2CO312g/L,
NiSO42g/L, phosphatase 11 8g/L, surplus is water.
Embodiment three
A kind of chemical zincation immersion of magnesium alloy shell electroplating surface copper, described zincate solution immersion consists of:
ZnSO4·7H2O33g/L, Na4P2O7·10H2O167g/L, NaF10.5g/L, KF7.5g/L, Na2CO39g/L,
NiSO42.7g/L, phosphatase 11 6g/L, surplus is water.
Embodiment four
A kind of chemical zincation immersion of magnesium alloy shell electroplating surface copper, described zincate solution immersion consists of:
ZnSO4·7H2O35g/L, Na4P2O7·10H2O163g/L, NaF11.5g/L, KF6.5g/L, Na2CO311g/L,
NiSO42.3g/L, phosphatase 11 7g/L, surplus is water.
Embodiment five
A kind of chemical zincation immersion of magnesium alloy shell electroplating surface copper, described zincate solution immersion consists of:
ZnSO4·7H2O34g/L, Na4P2O7·10H2O165g/L, NaF11.0g/L, KF7.0g/L, Na2CO310g/L,
NiSO42.5g/L, phosphatase 11 6.5g/L, surplus is water.
Claims (2)
1. the chemical zincation immersion of a magnesium alloy shell electroplating surface copper, it is characterised in that described zincate solution
Immersion consists of: ZnSO4·7H2O 33-35g/L, Na4P2O7·10H2O 163-167g/L, NaF
10.5-11.5g/L, KF 6.5-7.5g/L, Na2CO39-11g/L, NiSO42.3-2.7g/L, phosphoric acid
16-17g/L, surplus is water.
The chemical zincation immersion of a kind of magnesium alloy shell electroplating surface copper the most as claimed in claim 1, it is special
Levying and be, described zincate solution immersion consists of: ZnSO4·7H2O 34g/L, Na4P2O7·10H2O 165g/L,
NaF 11.0g/L, KF 7.0g/L, Na2CO310g/L, NiSO42.5g/L, phosphatase 11 6.5g/L, surplus
For water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310218149.2A CN103938194B (en) | 2013-06-03 | A kind of chemical zincation immersion of magnesium alloy shell electroplating surface copper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310218149.2A CN103938194B (en) | 2013-06-03 | A kind of chemical zincation immersion of magnesium alloy shell electroplating surface copper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103938194A CN103938194A (en) | 2014-07-23 |
| CN103938194B true CN103938194B (en) | 2016-11-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1641075A (en) * | 2004-01-18 | 2005-07-20 | 香港生产力促进局 | Magnesium and Mg alloy surface activating method and surface palting method |
| CN101275221A (en) * | 2008-05-13 | 2008-10-01 | 周学华 | Method for chemical plating nickel-phosphorus alloy on surface of magnesium alloy |
| CN101280445A (en) * | 2008-05-16 | 2008-10-08 | 广州杰赛科技股份有限公司 | Electroplating process for surface of magnesium alloy motorcycle hub |
| CN101831641A (en) * | 2010-05-17 | 2010-09-15 | 哈尔滨工程大学 | Acid zinc dipping solution of magnesium-lithium alloy and zinc dipping method |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1641075A (en) * | 2004-01-18 | 2005-07-20 | 香港生产力促进局 | Magnesium and Mg alloy surface activating method and surface palting method |
| CN101275221A (en) * | 2008-05-13 | 2008-10-01 | 周学华 | Method for chemical plating nickel-phosphorus alloy on surface of magnesium alloy |
| CN101280445A (en) * | 2008-05-16 | 2008-10-08 | 广州杰赛科技股份有限公司 | Electroplating process for surface of magnesium alloy motorcycle hub |
| CN101831641A (en) * | 2010-05-17 | 2010-09-15 | 哈尔滨工程大学 | Acid zinc dipping solution of magnesium-lithium alloy and zinc dipping method |
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Effective date of registration: 20160616 Address after: Lake Town, Xishan District People's road 214000 Jiangsu city of Wuxi province and red Ju Wei Village No. 100 Applicant after: Hua Wenwei Address before: Lake town of Xishan District in Jiangsu province 214100 Wuxi dakouhu Qing Dang village of Wuxi city Xishan District Town Lake Dangkou Qing Dang metal products factory Applicant before: WUXI XISHAN DISTRICT EHU TOWN DANGKOU QINGDANG METAL PRODUCT FACTORY |
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Effective date of registration: 20161011 Address after: 225510, Ma 986 Road, Jiangyan District, Jiangsu, Taizhou Applicant after: 5ELEM HI-TECH CORPORATION Address before: Lake Town, Xishan District People's road 214000 Jiangsu city of Wuxi province and red Ju Wei Village No. 100 Applicant before: Hua Wenwei |
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