CN201567375U - Corrosion-Proof coating on surface of magnesium alloy - Google Patents
Corrosion-Proof coating on surface of magnesium alloy Download PDFInfo
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- CN201567375U CN201567375U CN2009202941786U CN200920294178U CN201567375U CN 201567375 U CN201567375 U CN 201567375U CN 2009202941786 U CN2009202941786 U CN 2009202941786U CN 200920294178 U CN200920294178 U CN 200920294178U CN 201567375 U CN201567375 U CN 201567375U
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- fluororine
- polysiloxane
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Abstract
A corrosion-Proof coating on the surface of a magnesium alloy is arranged on a magnesium alloy basal body; a polysiloxane modified fluorocarbon coating is arranged on the outer surface of the magnesium alloy basal body; and a siloxane coating is arranged between the magnesium alloy basal body and the polysiloxane modified fluorocarbon coating. The utility model solve the problem of weak bonding force of the fluorocarbon coating and the magnesium alloy basal body; since the polysiloxane modified fluorocarbon coating has excellent durability and corrosion resistance to strongly protect the magnesium alloy; at the same time, the siloxane coating with better bonding capacity is taken as an intermediate layer to play a role of spliced joint, so as to tightly cover the polysiloxane modified fluorocarbon coating on the magnesium alloy basal body, therefore, the bonding force of the coatings and the basal body is effectively improved, and the corrosion resistance of the magnesium alloy is remarkably enhanced.
Description
Technical field
The utility model relates to the preservative treatment technology of Mg alloy surface, especially a kind of erosion shield that can increase bonding force between Mg alloy surface and the organic materials.
Background technology
Magnesium alloy is a kind of lighter engineering structure metallic substance, has that density is little, specific tenacity is high and favorable conductive ability and capability of electromagnetic shielding, also has characteristics such as vibration damping and damping capacity are good, easy recycling simultaneously.Magnesium alloy can be widely used in fields such as automobile, aerospace.But (2.37V), chemical property is active, and solidity to corrosion is relatively poor, and needing usually during use increases one deck supercoat on its surface because the electropotential of magnesium is very low.
Present various organic coating has been widely used in metallic surface as epoxy, vinylformic acid, acid polyethylene and fluorocarbon coating etc. and has handled.Wherein, fluorocarbon coating is because of having satisfactory stability, fabulous outside durabitity and erosion resistance, by more bridge, steel construction, the buildings etc. of being applied to.Yet; also, make fluororine-carbon coating be difficult to combine, therefore with other material just because of fluorocarbon coating molecular structure good stability; when using fluororine-carbon coating, can only improve bonding force with metallic matrix by surface modification treatment as the supercoat of metallic matrix.
In the present metallic surface preconditioning technique, the most representative with the chromate conversion technology of U.S. road (Dow) chemical company exploitation, but contain hexavalent chromium in its treatment solution that adopts, all can cause bigger harm to environment and HUMAN HEALTH.Therefore, people need develop environment amenable surface preparation technology.At present the siloxanes preconditioning technique has been applied to iron and steel, aluminium alloy or other metallic substance because can reinforcement metal and the combining of organic coating.Therefore, in order to improve the solidity to corrosion of magnesium alloy, the silane pretreatment technology being combined with fluororine-carbon coating study, is a new direction.
The utility model content
At above-mentioned deficiency of the prior art; the purpose of this utility model is to solve the present magnesium alloy supercoat surperficial with it and is difficult to combine closely; thereby cause the in use easy flange of surperficial supercoat, come off; the problem that causes magnesium alloy to be corroded easily; and provide and have stronger bonding force between a kind of and the magnesium alloy; can strengthen the corrosion resistance nature of magnesium alloy, and lower-cost Mg alloy surface erosion shield.
The technical solution of the utility model: a kind of Mg alloy surface erosion shield, comprise magnesium alloy substrate, it is characterized in that, polysiloxane-modified fluororine-carbon coating is set, between magnesium alloy substrate and polysiloxane-modified fluororine-carbon coating, silicon coating is set at the outside surface of magnesium alloy substrate.
Because polysiloxane-modified fluororine-carbon coating has fabulous weather resistance and erosion resistance, it can produce extremely strong provide protection to magnesium alloy; Utilize silicon coating and metal binding ability preferably simultaneously, with it as the middle layer, play the effect of adhesive bond, overcome polysiloxane-modified fluororine-carbon coating itself like this because too stable so that the more weak problem of bonding force, make polysiloxane-modified fluororine-carbon coating to cover closely on the magnesium alloy substrate, given full play to the characteristics of fluororine-carbon coating good endurance.
Further, described silicon coating comprises siloxanes prime coat and siloxanes transition layer, and the siloxanes prime coat is arranged between magnesium alloy substrate and the siloxanes transition layer.Prime coat and transition layer are the siloxanes of identical material, and prime coat plays the pre-treatment effect to magnesium alloy, by coating transition layer again, has both strengthened its binding ability then, also can produce certain protective effect to magnesium alloy substrate.
When fluororine-carbon coating was set, described polysiloxane-modified fluororine-carbon coating was two roads or multiple tracks, adopt to brush or the mode of spraying is arranged on the outermost layer of magnesium alloy substrate with polysiloxane-modified fluororine-carbon coating, so that it is more even, can prevent local shedding simultaneously.
The utility model has solved fluororine-carbon coating and the weak problem of magnesium alloy substrate bonding force, and is silicone-modified by siloxanes pre-treatment and fluororine-carbon coating, improved the bonding force of coating and matrix effectively, improves the solidity to corrosion of magnesium alloy significantly.
With respect to prior art, the utlity model has following advantage:
1, is provided with two-layer silicon coating on the surface of magnesium alloy, form the prime coat and the transition layer of siloxanes, by can effectively improving the bonding force of organic coatings such as polysiloxane-modified fluororine-carbon coating and metallic substance after the pre-treatment of twice siloxanes, also further strengthened the corrosion resistance nature of magnesium alloy substrate;
2, because polysiloxane-modified fluororine-carbon coating has excellent weather resistance,, significantly strengthened the corrosion resisting property of matrix by at the siloxane modified fluororine-carbon coating of alloy outside surface sprayed silicon;
3, the corrosion protection coating construction technology of this structure is simple, production efficiency is higher, and cost of manufacture is low, the technical security environmental protection, is fit to scale operation and applies.
Description of drawings
Fig. 1 is erosion shield distributed architecture figure of the present utility model.
Among the figure, 1-magnesium alloy substrate, 2-prime coat, 3-transition layer, the polysiloxane-modified fluororine-carbon coating of 4-.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Embodiment 1: a kind of Mg alloy surface erosion shield, comprise magnesium alloy substrate 1, and at the outside surface of magnesium alloy substrate 1 polysiloxane-modified fluororine-carbon coating 4 is set, between magnesium alloy substrate 1 and polysiloxane-modified fluororine-carbon coating 4, silicon coating is set.
Silicon coating is used to increase the bonding force between polysiloxane-modified fluororine-carbon coating 4 and the magnesium alloy substrate 1, himself also possesses certain anti-corrosion capability, the further like this protection effect that has strengthened magnesium alloy simultaneously.
The utility model adopts extrusion plate AZ31 magnesium alloy is carried out surface treatment, after the sample of the coating structure that obtains is tested by electrochemistry experiment, effectively improve the solidity to corrosion of body material, corrosion electric current density is compared with body material, and 4 orders of magnitude have nearly descended.
Embodiment 2: as shown in Figure 1, a kind of Mg alloy surface erosion shield, be arranged on the magnesium alloy substrate 1, outside surface at magnesium alloy substrate 1 is provided with polysiloxane-modified fluororine-carbon coating 4, between magnesium alloy substrate 1 and polysiloxane-modified fluororine-carbon coating 4, be provided with two-layer silicon coating, described silicon coating is siloxanes prime coat 2 and siloxanes transition layer 3, and siloxanes prime coat 2 is arranged between magnesium alloy substrate 1 and the siloxanes transition layer 3.
2 pairs of magnesium alloy substrates of described siloxanes prime coat play the pre-treatment effect, form the thin layer with strong bonding force on the surface of magnesium alloy substrate; Siloxanes transition layer 3 is used for combining with polysiloxane-modified fluororine-carbon coating 4, can also increase the thickness of silicon coating simultaneously.
Embodiment 3: a kind of Mg alloy surface erosion shield, be arranged on the magnesium alloy substrate 1, outside surface at magnesium alloy substrate 1 is provided with two roads or the polysiloxane-modified fluororine-carbon coating 4 of multiple tracks, is provided with silicon coating between magnesium alloy substrate 1 and polysiloxane-modified fluororine-carbon coating 4.
In above embodiment; polysiloxane-modified fluororine-carbon coating 4 all adopts the mode of brushing or spraying to be arranged on the magnesium alloy substrate; this technology making method belongs to conventional means; do not describe in detail at this; main purpose of the present utility model is after brushing or spraying; form the supercoat of aforesaid laminate structure at magnesium alloy matrix surface, corrosion-resistant, the fine and close fastening and characteristics that are evenly distributed that this supercoat has can form for a long time effectively protection to magnesium alloy substrate.
Need to prove at last, above embodiment is only in order to illustrate the technical solution of the utility model but not the restriction technologies scheme, although the applicant has been described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, those are made amendment to the technical solution of the utility model or are equal to replacement, and do not break away from the aim and the scope of the technical program, all should be encompassed in the middle of the claim scope of the present utility model.
Claims (3)
1. Mg alloy surface erosion shield, comprise magnesium alloy substrate (1), it is characterized in that, polysiloxane-modified fluororine-carbon coating (4) is set, between magnesium alloy substrate (1) and polysiloxane-modified fluororine-carbon coating (4), silicon coating is set at the outside surface of magnesium alloy substrate (1).
2. Mg alloy surface erosion shield according to claim 1, it is characterized in that, described silicon coating comprises siloxanes prime coat (2) and siloxanes transition layer (3), and siloxanes prime coat (2) is arranged between magnesium alloy substrate (1) and the siloxanes transition layer (3).
3. Mg alloy surface erosion shield according to claim 1 is characterized in that, described polysiloxane-modified fluororine-carbon coating (4) is two roads or multiple tracks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202941786U CN201567375U (en) | 2009-12-28 | 2009-12-28 | Corrosion-Proof coating on surface of magnesium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202941786U CN201567375U (en) | 2009-12-28 | 2009-12-28 | Corrosion-Proof coating on surface of magnesium alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201567375U true CN201567375U (en) | 2010-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202941786U Expired - Fee Related CN201567375U (en) | 2009-12-28 | 2009-12-28 | Corrosion-Proof coating on surface of magnesium alloy |
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| CN (1) | CN201567375U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102477526A (en) * | 2010-11-22 | 2012-05-30 | 鸿富锦精密工业（深圳）有限公司 | Shell and manufacture method thereof |
| CN103008216A (en) * | 2012-11-26 | 2013-04-03 | 中国计量科学研究院 | Inner wall treatment process of aluminum alloy pressure gas cylinder and treating device |
| CN103741126A (en) * | 2013-12-20 | 2014-04-23 | 山东科技大学 | Preparation method of surface self-stratifying composite coating of magnesium alloy |
-
2009
- 2009-12-28 CN CN2009202941786U patent/CN201567375U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102477526A (en) * | 2010-11-22 | 2012-05-30 | 鸿富锦精密工业（深圳）有限公司 | Shell and manufacture method thereof |
| CN102477526B (en) * | 2010-11-22 | 2015-02-04 | 鸿富锦精密工业（深圳）有限公司 | Shell and manufacture method thereof |
| CN103008216A (en) * | 2012-11-26 | 2013-04-03 | 中国计量科学研究院 | Inner wall treatment process of aluminum alloy pressure gas cylinder and treating device |
| CN103741126A (en) * | 2013-12-20 | 2014-04-23 | 山东科技大学 | Preparation method of surface self-stratifying composite coating of magnesium alloy |
| CN103741126B (en) * | 2013-12-20 | 2016-04-20 | 山东科技大学 | A kind of preparation method of Mg alloy surface self demixing compound coating |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100901 Termination date: 20121228 |