CN1654703A - Surface treatment method - Google Patents
Surface treatment method Download PDFInfo
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- CN1654703A CN1654703A CN 200410014052 CN200410014052A CN1654703A CN 1654703 A CN1654703 A CN 1654703A CN 200410014052 CN200410014052 CN 200410014052 CN 200410014052 A CN200410014052 A CN 200410014052A CN 1654703 A CN1654703 A CN 1654703A
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- magnesium alloy
- alloy shell
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- metal
- surface treatment
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Abstract
The surface treatment process for magnesium alloy casing includes the pre-treatment of magnesium alloy casing base and metal target, forming a metal coating on the surface of the magnesium alloy casing base with the metal target, and heat treatment of the magnesium alloy casing base with the surface coating for diffusion to form intermetallic compound with high antiwear performance and heat resistance and to improve the surface performance of magnesium alloy casing.
Description
[technical field]
The invention relates to a kind of surface treatment method, particularly about a kind of magnesium alloy shell surface treatment method that is applied on the portable electron devices such as notebook computer or mobil phone.
[background technology]
The fast development of on portable type electronic products such as notebook computer, using in recent years along with magnesium alloy, people have been satisfied to the requirement of portable type electronic product at aspects such as compact and EMI, but because magnesium alloy material is easy to corrode in damp atmosphere, sulfur-bearing atmosphere and marine atmosphere, there are the not good characteristics of abrasion resistance properties simultaneously, so must carry out surface treatment to them, to increase performances such as wear-resisting, corrosion-resistant.
The surface treatment of magnesium alloy at present mainly contains methods such as chemical membrane processing, anodic oxidation treatment and metal plating processing.But, magnesium alloy after employing hexavalent chromium chemistry film forming is handled is aspect corrosion-resistant and anti scuffing power, be difficult to satisfy the service requirements of magnesium alloy product, and just progressively limit chromate treating for the pollution problem country that exists in the treating processes, and the Chrome-free chemical membrane is handled the shortcoming that rete densification inadequately, the thin protective value difference of film are arranged; The porousness of anode oxide film is brought difficulty for the barrier propterty that improves film, although but the differential arc oxidation method partial melting reduces hole, be difficult to thoroughly eliminate, and the investment of differential arc oxidation treatment facility is big; And the coating that metal plating is handled exists hole, can not directly extend to the magnesium alloy base material for making the coating hole, need to handle acquisition than thickness coating by the multiple layer metal plating, but the treatment process process is comparatively loaded down with trivial details.
Because Jie's metallic compound has compact structure, wear-resisting and corrosion resistant high-performance compared to metal plating, improves the magnesium alloy shell surface property by Jie's metal compound film and has become a kind of selection.Generally when making Jie's metal compound film, need mix needed Jie's metallic compound earlier, produce one deck Jie metal compound film with this again, the prepared thin film composition of this kind mode has only a kind of, if will obtain the identical element composition but Jie's metallic compound of proportioning difference, then must change target, its range of application is restricted, and cause cost up.Simultaneously; Jie's metallic compound that is obtained forms thin film deposition on magnesium alloy shell by methods such as evaporation or sputters; become film and magnesium alloy shell base material can not reach metallic bond to be connected; the possibility that has film and base material to come off in the use, the metal compound film that causes being situated between is weakened to the provide protection of magnesium alloy shell base material.
[summary of the invention]
The object of the present invention is to provide a kind of surface treatment method of magnesium alloy shell, this method both can improve magnesium alloy shell substrate surface performance, but widespread use and cost are not high again.
The objective of the invention is to be achieved through the following technical solutions: a magnesium alloy shell base material and a metal targets are provided; Before the surface treatment magnesium alloy shell base material and metal targets are carried out surface preparation; Utilize metal targets evaporation or sputter magnesium alloy shell base material, form a metal plating at the magnesium alloy shell substrate surface; Magnesium alloy shell base material and overlay coating thereof are heat-treated, make it to take place diffusion reaction and form Jie's metallic compound.
Compared to prior art, the present invention is by first evaporation or sputtered target material metal, make the magnesium alloy shell substrate surface form a metal plating, reheat diffuses to form the process of Jie's metallic compound rete, helping the producer freely selects different metals to form Jie's metallic compound rete at the magnesium alloy shell substrate surface, make the metal range of choice of Jie's metal compound film more extensive, simultaneously, also exempted from but can reduce production costs for purchasing the remote transportation that extraordinary Jie's metallic compound carries out; In addition, formed Jie's metallic compound rete is that metal plating passes through diffusion reaction and gets, and links incrustly between Jie's metallic compound rete and the magnesium alloy shell base material by metallic bond, can improve magnesium alloy shell substrate surface performance.
[embodiment]
It is as follows that magnesium alloy shell surface treatment method provided by the invention carries out process:
The first, a magnesium alloy shell base material and a metal targets are provided.
One magnesium alloy shell base material is provided, provide one can pass through technology such as evaporation or sputter form metal plating at the magnesium alloy shell substrate surface metal targets in addition, this metal targets can be metals such as nickel, iron, molybdenum, this embodiment target is selected the nickel metal for use, metal targets can be made into different shape, the particular design of cooperation board is done the production of better control and full blast, and target thickness of the present invention can be 5-15mm, and is thick preferable with 10mm.
The second, magnesium alloy shell base material and metal targets are carried out surperficial pre-treatment.
The magnesium alloy shell base material carries out surperficial pre-treatment key step: first degreasing is cleaned, and then carries out twice washing, is that pickling is handled with washing then, carries out phosphate again and handles, at last for washing, pure water is washed and drying treatment.Detailed process is: at first take off clean in advance to this magnesium alloy shell base material, grunge pollution with strong this magnesium alloy shell substrate surface of erosion acid removal of solvents, the keyed jointing of extensive damage oil stain and this magnesium alloy shell base material, then to this magnesium alloy shell base material lead take off clean, grunge pollution with this magnesium alloy shell substrate surface of retentivity solution removal, but must not damage this magnesium alloy shell substrate surface itself, next carry out twice washing successively, residual the taking off ester solvent and pollute of this magnesium alloy shell substrate surface thoroughly washed off.Further wash this magnesium alloy shell base material with acid solution, adjust the reactivity of this magnesium alloy shell substrate surface, in and the remained on surface SOLUTION PROPERTIES, promote the adhesion property of the rete of subsequent handling generation simultaneously, wash for the third time then, acid solution and pollutent that this magnesium alloy shell substrate surface is residual are washed off, use the Mg alloy surface treatment agent simultaneously the magnesium alloy shell substrate surface is carried out the processing of Chrome-free chemical membrane, simultaneously in order to guarantee the homo(io)thermism of treatment solution, carry out also needing to adopt circulating cooling system when film forming is handled, make it form a corrosion skin membrane, promote the tack of subsequent coated layer simultaneously, then carry out the 4th washing, this magnesium alloy shell substrate surface residual solvent and dirt are removed, further carried out the 5th washing again, remove the remaining ionogen of this magnesium alloy shell substrate surface or remove the solubility salt by immersion with pure water, the final drying base material, the carrying out of wait subsequent handling.
If carry out surface treatment, before the plating piece metal targets is carried out pre-sputter in the first time, to remove the zone of oxidation or the pollution layer on metal targets surface with sputter.
The 3rd, with metal targets the magnesium alloy shell base material is carried out evaporation or sputter processing, plate metal level at the magnesium alloy shell substrate surface.
Evaporation can adopt vacuum evaporation, sputter can adopt direct current diode sputtering and magnetron sputtering etc., technical process is as direct current diode sputtering coating film treatment: at first plate pre-treatment, follow clamping magnesium alloy shell base material and metal targets, be to vacuumize and toast, bombard processing then, carry out sputtering sedimentation again and handle, be cooling, pickup and aftertreatment at last.Detailed process is: earlier this nickel metal targets and this magnesium alloy shell base material are together placed in the sputtering chamber, sputtering chamber is evacuated down to about 4 * 10
-1Pa, charge into argon gas then, and control vacuum tightness is connected the water coolant and the direct supply of target at 1～10Pa in the sputter process, applies the high direct voltage of 1～5Kv, and pick up counting, cut off the electricity supply after 3 hours, and close the argon gas inflation valve, finish sputter, thereby form a thin fine and close nickel metal plating on the magnesium alloy shell base material, its coating is thick to be 10～20um.Baking, bombardment can be used as unnecessary operation.
The 4th, magnesium alloy shell base material and surface metal plating layer thereof are heat-treated, make metal level in treating processes with magnesium alloy shell base material generation diffusion reaction, form the stable phase under this temperature, promptly required Jie's metallic compound.
Magnesium alloy shell base material and surface metal plating layer thereof are placed the high vacuum process furnace, impose 300 ℃～400 ℃ Heating temperatures, with 350 ℃ is good, continue heating in 20～30 hours, with 24 hours was good, made this nickel metal plating fully spread on this magnesium alloy shell base material top layer, and reacted, generate corresponding Jie's Mg2Ni metallic compound rete, it is cooled off in vacuum environment.
The 5th, the magnesium alloy shell after surface treatment carries out external coating to be handled, and reaches further reinforcement to the protection of magnesium alloy shell substrate surface with beautify the effect of housing outward appearance.
The surface treatment method of magnesium alloy shell base material of the present invention has the following advantages compared to prior art: the method with sputter forms a metal level at the magnesium alloy shell substrate surface earlier, compared to the method for directly plating Jie's metallic compound at substrate surface, selecting for use of metal targets has more freedom and popularity, avoided the restriction of magnesium Jie metallic compound target kind, simultaneously, also exempted from but can reduce production costs for purchasing the remote transportation that extraordinary Jie's metallic compound carries out; Magnesium alloy shell base material and metal plating more are difficult to peel off the magnesium alloy shell base material with Jie's metallic compound rete that metallic bond is connected to form compared to the combination that metal plating is deposited on substrate surface; and stronger corrosion resistance nature and wear resistance are arranged, can make the magnesium alloy shell substrate surface obtain more stable protection.
Claims (5)
1. a surface treatment method can be handled the magnesium alloy shell surface, and its step comprises: a magnesium alloy shell base material and a metal targets are provided; Magnesium alloy shell base material and metal targets are carried out surperficial pre-treatment; Utilize metal targets that the magnesium alloy shell base material is carried out metal plating and handle, form a metal plating at the magnesium alloy shell substrate surface; Magnesium alloy shell base material and overlay coating thereof are heat-treated, make it to take place diffusion reaction and form Jie's metallic compound.
2. magnesium alloy shell surface treatment method as claimed in claim 1 is characterized in that: used metal targets can be metals such as nickel, iron, molybdenum.
3. magnesium alloy shell surface treatment method as claimed in claim 1 is characterized in that: metal plating is handled the surface treatment method that adopts evaporation or sputter.
4. magnesium alloy shell surface treatment method as claimed in claim 1 is characterized in that: metal plating takes place under the thermal treatment of controlled temperature and time at the diffusion reaction of magnesium alloy shell substrate surface, and generates Jie's metallic compound.
5. magnesium alloy shell surface treatment method as claimed in claim 1 is characterized in that: the thermal treatment of metal plating and magnesium alloy shell base material is carried out in the environment of high vacuum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014052 CN1654703A (en) | 2004-02-11 | 2004-02-11 | Surface treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014052 CN1654703A (en) | 2004-02-11 | 2004-02-11 | Surface treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1654703A true CN1654703A (en) | 2005-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410014052 Pending CN1654703A (en) | 2004-02-11 | 2004-02-11 | Surface treatment method |
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| CN (1) | CN1654703A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944496A (en) * | 2009-07-02 | 2011-01-12 | 台湾积体电路制造股份有限公司 | Method and structure for adhesion of intermetallic compound (imc) on cu pillar bump |
| CN106319309A (en) * | 2015-06-24 | 2017-01-11 | 吕传盛 | Magnesium alloy suitable for medical implant and manufacturing method of magnesium alloy |
| CN108642311A (en) * | 2018-05-15 | 2018-10-12 | 张建华 | A kind of preparation method of magnesium alloy materials |
-
2004
- 2004-02-11 CN CN 200410014052 patent/CN1654703A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944496A (en) * | 2009-07-02 | 2011-01-12 | 台湾积体电路制造股份有限公司 | Method and structure for adhesion of intermetallic compound (imc) on cu pillar bump |
| US8592995B2 (en) | 2009-07-02 | 2013-11-26 | Taiwan Semiconductor Manufacturing Company, Ltd. | Method and structure for adhesion of intermetallic compound (IMC) on Cu pillar bump |
| CN106319309A (en) * | 2015-06-24 | 2017-01-11 | 吕传盛 | Magnesium alloy suitable for medical implant and manufacturing method of magnesium alloy |
| CN106319309B (en) * | 2015-06-24 | 2019-01-18 | 延鑫兴业股份有限公司 | Magnesium alloy and its manufacturing method suitable for medical implant |
| CN108642311A (en) * | 2018-05-15 | 2018-10-12 | 张建华 | A kind of preparation method of magnesium alloy materials |
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Open date: 20050817 |