CN102409379A - Method for preparing super-hydrophobic surface of magnesium alloy matrix by using primary battery method - Google Patents
Method for preparing super-hydrophobic surface of magnesium alloy matrix by using primary battery method Download PDFInfo
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- CN102409379A CN102409379A CN2011103506488A CN201110350648A CN102409379A CN 102409379 A CN102409379 A CN 102409379A CN 2011103506488 A CN2011103506488 A CN 2011103506488A CN 201110350648 A CN201110350648 A CN 201110350648A CN 102409379 A CN102409379 A CN 102409379A
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Abstract
The invention discloses a method for preparing the super-hydrophobic surface of a magnesium alloy matrix by using a primary battery method. The primary battery method comprises the following steps: removing oxide layers from surfaces of a magnesium alloy plate and an other-metal plate, ultrasonically washing the magnesium alloy plate and the other-metal plate with absolute ethyl alcohol and de-ionized water in turn and drying the magnesium alloy plate and the other-metal plate; symmetrically placing the magnesium alloy plate and the other-metal plate in parallel, connecting the magnesium alloy plate with the other-metal plate through a conducting wire and then putting into a container containing electrolyte, thereby forming a magnesium alloy-other-metal primary battery; after soaking completely, washing the magnesium alloy plate with the de-ionized water, and then drying, thereby forming a binary micro-nanometer coarse structure on the surface of the magnesium alloy plate; and lastly, using a material with low surface energy to decorate the magnesium alloy plate, thereby obtaining the super-hydrophobic surface of the magnesium alloy matrix. The method has the advantages of energy conservation, environmental protection, safety, high efficiency, simple equipment and convenience in operation. During a process of processing the super-hydrophobic surface, not only is no electric energy consumed but also electric energy can be generated, thereby achieving multiple purposes.
Description
Technical field
The present invention relates to metal finishing, relate to a kind of process method that adopts galvanic cell method on magnesium alloy substrate, to make up super hydrophobic surface at ambient temperature.
Background
Super hydrophobic surface is because of having automatically cleaning, anti-stain, the drag reduction antifriction, suppressing characteristic such as surface corrosion; In fields such as military affairs, communication, aviation, the energy and biomedicine, very wide application prospect is arranged: super hydrophobic surface is used for the geographic satellite arm of high snowfall, solar panel, photoelectric commutator, can prevents the Serious Accidents such as signal interruption that cause because of accumulated snow, sleet.Be used for metallic substance, can play the effect of automatically cleaning, inhibition surface corrosion and surface oxidation.The friction resistance of underwater sailing body in advancing accounts for more than 80% of total-resistance, and super hydrophobic surface is used for the submarine shell, can reduce the resistance of water, improves route speed, saves the energy; Be used for conveying pipeline inner wall, microsyringe needle point, can reduce and flow between friction resistance, prevent to adhere to, stop up; Be used for microfluidic device, can realize that the low resistance of convection cell, no leakage loss transmit; Be used for miniature marine communication means, can make it have superpower supporting capacity.Be used for the biomedical materials such as intravascular stent that contact with blood, can suppress hematoblastic adhesion and activation, improve the blood compatibility of material.Be used for inwall and low-pressure compressor blade before the aircraft engine cabin, can reduce the serious accidents such as flame-out in flight of freezing and causing because of mover; Be used for related prodss such as air-conditioning, can solve problems such as cold surface condensation, air source heat pump and cold blast engine frosting.At present, super hydrophobic surface generally can prepare through two kinds of technological lines: one type is directly on the hydrophobic material surface of low surface energy, to make up the micro/nano level coarse structure; Other one type is on micro-nano coarse structure, to modify processing with low-surface-energy material.According to these two kinds of technological lines, the researchist prepares super hydrophobic surface on multiple metal and non-metallic material.
Because magnesiumalloy has advantages such as density is little, specific tenacity is high, Young's modulus is big, shock absorbing property is good, therefore be widely used.Super-hydrophobic Mg alloy surface Study on Preparation Technology also receives people's attention.Because Mg alloy surface is a water-wetted surface, must experience two steps so will on magnesium alloy substrate, prepare super hydrophobic surface: the one, roughened promptly adopts special methods to make up micro-nano coarse structure on the surface; The 2nd, the low surface energy processing promptly adopts silane, silicon fluoride or the Triple Pressed Stearic Acid of low surface energy to modify the coarse structure that is obtained.(Liang, J. since the magnesium alloy substrate super hydrophobic surface have been prepared from Liang in 2007 etc.; Guo, Z.G.; Fang, J.; Hao; J.C.Chemistry Letters 2007; 36; 416-417), existing several different methods is used to prepare the magnesium alloy substrate super hydrophobic surface, and these methods can be divided into: (200910192207. Kang Zhi are new for Chinese patent 200710078089.3. Chinese patent 200710078090. Chinese patents for the differential arc oxidation method; Lai Xiaoming; Wang Fen; The dragon wild goose; Li Yuanyuan. China YouSe Acta Metallurgica Sinica 2011,21,283-289), chemical etching method (Chinese patent 201010520898. Chinese patent 201010165310.0.Liu, K.S.; Zhang, M.L.; Zhai, J.; Wang, J.; Jiang, L.Applied Physics Letters 2008,92,183103.Wang, Y.H.; Wang, W.; Zhong, L.; Wang, J.; Jiang, Q.L.; Guo, X.Y.Applied Surface Science 2010,256,3837-3840.Yin, B.; Fang, L.; Hu, J.; Tang, A.Q.; Wei, W.H.; He, J.Applied Surface Science2010,257,1666-1671.), chemical deposition (Ishizaki, T.; Saito, N.Langmuir 2010,26,9749-9755.Wang, J.; Li, D.D.; Gao, R.; Liu, Q.; Jing, X.Y.; Wang, Y.L.; He, Y.; Zhang, M.L.Materials Chemistry and Physics 2011,129,154-160.Ishizaki, T.; Masuda, Y.; Sakamoto, M.Langmuir 2011,27,4780-4788.) with high-temperature-hot-water infusion method (Ishizaki, T.; Sakamoto, M.Langmuir 2011,27,2375-2381).Though the hydrophobicity of the magnesium alloy substrate super hydrophobic surface that aforesaid method is prepared is better, but still has different problems: the comparatively strictness of technical qualification that (1) differential arc oxidation method is required, operation is trouble; When preparation big area super hydrophobic surface, need to adopt large vol power supply and large-scale integral negative electrode.(2) chemical etching method need use corrosive liquid such as hydrochloric acid, sulfuric acid or nitric acid, works under hard conditions, and in the course of processing, can produce irritating bad smell, and is big to the harm of operator and environment; In the reaction process, loss can take place in solution, needs constantly to replenish the corrosive liquid of above-mentioned danger.(3) chemical deposition need adopt urea or cerous nitrate, and cerous nitrate has combustion-supporting and pungency, and can be accumulated in the underground water polluted underground water for a long time; When adopting urea, process period is longer, needs 12h.(4) compare with above-mentioned 3 kinds of methods, the high-temperature-hot-water infusion method is the method for relative environmental protection, but has the low problem of working (machining) efficiency, and each processing all needs the process period of several hrs.Therefore, be necessary to develop new safety, environmental protection, the course of processing is simple and working (machining) efficiency is high method prepares the magnesium alloy substrate super hydrophobic surface.
Summary of the invention
Technical problem to be solved by this invention provides a kind of safety, environmental protection, the course of processing is simple and working (machining) efficiency is high method prepares the magnesium alloy substrate super hydrophobic surface.
In order to solve the problems of the technologies described above, the process method that on magnesium alloy substrate, makes up super hydrophobic surface provided by the invention comprises the steps:
(1) zone of oxidation of removal magnesium alloy plate and other metal sheet surfaces is used absolute ethyl alcohol and deionized water ultrasonic cleaning to handling the back magnesium alloy plate successively with other metal sheets then, and is dried up; Other metals that adopted comprise the metal that all electropotentials are higher than magnesium;
(2) the parallel symmetry of magnesium alloy plate and other metal sheets is placed and link to each other, put it into then and constitute magnesiumalloy-other metal galvanic cells in the container that fills electrolytic solution through lead; The electrolytic solution that is adopted is the NaCl aqueous solution, the NaBr aqueous solution, Na
2SO
4The aqueous solution or NaClO
3The aqueous solution; Soak time is no less than 15min, and immersion is used deionized water rinsing with magnesium alloy plate after accomplishing, and dries up;
(3) above-mentioned magnesium alloy plate is put into the ethanolic soln that contains low-surface-energy material and modify, take out the back oven dry, promptly obtain the magnesium alloy substrate super hydrophobic surface behind the cool to room temperature; The low-surface-energy material that is adopted comprises silicon fluoride, Triple Pressed Stearic Acid, palmitinic acid, LAURIC ACID 99 MIN or tetradecanoic acid etc.
The present invention compares with existing magnesium alloy substrate super hydrophobic surface technology of preparing and has the following advantages:
(1) the present invention need not complicated processing unit (plant) and operation steps, and large-area preparation very easily.
(2) the present invention can adopt neutral electrolyte, need not strong acid, highly basic, and nonirritant gas produces in the reaction process, and is little to the harm of operator and environment.
(3) working (machining) efficiency of the present invention is high, only needs the time of tens clocks just can obtain the micro-nano coarse structure of the required binary of super hydrophobic surface.
(4) the magnesium alloy substrate super hydrophobic surface that obtains of the present invention has ultra-hydrophobicity preferably, and greater than 155 °, roll angle is less than 5 ° to the contact angle of water.
(5) the present invention does not need consumed power at the preparation super hydrophobic surface, forms galvanic cell simultaneously, and the electric energy of generation can be used for power, illumination, communication etc.
Description of drawings
Fig. 1 is the processing unit (plant) synoptic diagram of embodiment 1.
Fig. 2 is the sem photograph of the magnesium alloy substrate super hydrophobic surface of embodiment 1 acquisition.
Fig. 3 is the sem photograph of the magnesium alloy substrate super hydrophobic surface of embodiment 1 acquisition.
Fig. 4 is the sem photograph of the magnesium alloy substrate super hydrophobic surface of embodiment 1 acquisition.
Fig. 5 is the hydrophobic synoptic diagram of the magnesium alloy substrate super hydrophobic surface of embodiment 1 acquisition.
Embodiment
Be described in detail specific embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
Embodiment 1
(1) magnesium alloy plate and copper coin are cut into 20mm * 30mm, actual working (finishing) area is 20mm * 20mm, and rest part is used for clamping and conduction.Before the processing, earlier with 1500# sand papering magnesium alloy plate and copper coin to remove surperficial zone of oxidation, then magnesium alloy plate and copper coin after polishing are used absolute ethyl alcohol and deionized water ultrasonic cleaning successively, scavenging period is respectively 2min, and dries up.
(2) the parallel symmetry with copper coin of magnesium alloy plate is fixed, two distances between plates are 5mm, and two plates link to each other through lead simultaneously.Two plates are put into fill the 2mol/L NaCl aqueous solution, this moment, whole system constituted loop, and galvanic cell is started working.Adding the man-hour solution temperature is room temperature (about 25 ℃), and be 60min process period.Because the electropotential of magnesium is lower than copper, magnesiumalloy will become negative pole and oxidizing reaction will take place.
(3) magnesium alloy plate is used deionized water rinsing after machining; And dry up, put it into the massfraction for preparing at last and be in 1% the silicon fluoride ethanolic soln, take out after at room temperature soaking 2h; Put into baking oven; Dry by the fire 15min down at 80 ℃, take out back cool to room temperature in air, can obtain super hydrophobic surface.The contact angle of water droplet on the magnesium alloy substrate super hydrophobic surface is 162.8 °, and roll angle is 2 °.If use Triple Pressed Stearic Acid, palmitinic acid, LAURIC ACID 99 MIN or tetradecanoic acid to wait when reducing surface energy, contact angle all can be above 150 °.
Claims (1)
1. one kind prepares the magnesium alloy substrate super hydrophobic surface with galvanic cell method, it is characterized in that may further comprise the steps:
(1) zone of oxidation of removal magnesium alloy plate and other metal sheet surfaces is used absolute ethyl alcohol and deionized water ultrasonic cleaning to handling the back magnesium alloy plate successively with other metal sheets then, and is dried up; Described other metals comprise the metal that all electropotentials are higher than magnesium;
(2) the parallel symmetry with other metal sheets of magnesium alloy plate is placed, and it is continuous to pass through lead, puts it into then to constitute magnesiumalloy-other metal galvanic cells in the container that fills electrolytic solution; The electrolytic solution that is adopted is the NaCl aqueous solution, the NaBr aqueous solution, Na
2SO
4The aqueous solution or NaClO
3The aqueous solution; Soak time is no less than 15min; After soaking completion magnesium alloy plate is used deionized water rinsing, and dry up;
(3) magnesium alloy plate that step (2) is obtained is put into the ethanolic soln that contains low-surface-energy material and is modified, and takes out the back oven dry, promptly obtains the magnesium alloy substrate super hydrophobic surface behind the cool to room temperature; The low-surface-energy material that is adopted comprises silicon fluoride, Triple Pressed Stearic Acid, palmitinic acid, LAURIC ACID 99 MIN or tetradecanoic acid.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982017A (en) * | 2014-01-07 | 2014-08-13 | 宋波 | Anti-condensation metal radiant panel and manufacturing method thereof |
| CN107916421A (en) * | 2017-11-13 | 2018-04-17 | 常州麒通国际贸易有限公司 | A kind of preparation method of corrosion resistance magnesium alloy super-hydrophobic surface |
| CN110129855A (en) * | 2019-06-11 | 2019-08-16 | 南通大学 | A kind of surface treatment method of corrosive protection of aluminium alloy |
| CN112044714A (en) * | 2020-09-28 | 2020-12-08 | 榆林学院 | Preparation method of magnesium alloy surface super-hydrophobic coating |
| CN112458512A (en) * | 2020-11-19 | 2021-03-09 | 西安交通大学 | Preparation method of magnesium alloy micro-arc oxidation black super-hydrophobic film layer |
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| US20090317590A1 (en) * | 2006-07-05 | 2009-12-24 | Postech Academy-Industry Foundation | Method for fabricating superhydrophobic surface and solid having superhydrophobic surface structure by the same method |
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2011
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| WO2008004828A1 (en) * | 2006-07-05 | 2008-01-10 | Postech Academy-Industry Foundation | Method for fabricating superh ydrophob ic surface and solid having superhydrophobic surface structure by the same method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982017A (en) * | 2014-01-07 | 2014-08-13 | 宋波 | Anti-condensation metal radiant panel and manufacturing method thereof |
| CN107916421A (en) * | 2017-11-13 | 2018-04-17 | 常州麒通国际贸易有限公司 | A kind of preparation method of corrosion resistance magnesium alloy super-hydrophobic surface |
| CN110129855A (en) * | 2019-06-11 | 2019-08-16 | 南通大学 | A kind of surface treatment method of corrosive protection of aluminium alloy |
| CN110129855B (en) * | 2019-06-11 | 2021-04-27 | 南通大学 | Surface treatment method for corrosion prevention of aluminum alloy |
| CN112044714A (en) * | 2020-09-28 | 2020-12-08 | 榆林学院 | Preparation method of magnesium alloy surface super-hydrophobic coating |
| CN112458512A (en) * | 2020-11-19 | 2021-03-09 | 西安交通大学 | Preparation method of magnesium alloy micro-arc oxidation black super-hydrophobic film layer |
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Application publication date: 20120411 |