TWI623651B - Dyeing method for micro-arc processing of metal workpiece - Google Patents
Dyeing method for micro-arc processing of metal workpiece Download PDFInfo
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Abstract
本發明提出一種微弧處理金屬工件的染色方法,包含下列步驟:提供一微弧處理金屬工件、一反應槽以及一染色槽。該微弧處理金屬工件具有一金屬基材以及一微弧氧化層,該微弧處理金屬工件具有一第一顏色。本發明包括一種使微弧氧化層產生電荷通道的方法,與一種微弧氧化層的染色方法,使該微弧處理金屬工件具有一第二顏色。透過此兩種方法即可使染料附著於微弧氧化層上,亦即陰離子染料粒子被吸附於微弧氧化層的電荷通道內,以達到染色的效果。The invention provides a method for dyeing a micro-arc metal workpiece, comprising the steps of: providing a micro-arc processing metal workpiece, a reaction tank and a dyeing tank. The micro-arc processed metal workpiece has a metal substrate and a micro-arc oxidation layer, the micro-arc processed metal workpiece having a first color. The present invention includes a method of causing a micro-arc oxidation layer to generate a charge path, and a micro-arc oxidation layer dyeing method to impart a second color to the micro-arc treated metal workpiece. Through these two methods, the dye can be attached to the micro-arc oxidation layer, that is, the anionic dye particles are adsorbed in the charge channel of the micro-arc oxidation layer to achieve the dyeing effect.
Description
本發明係關於一種染色方法,特別是關於一種微弧處理金屬工件的染色方法。The present invention relates to a dyeing method, and more particularly to a method of dyeing a micro-arc treated metal workpiece.
微弧氧化(Micro-arc oxidation,MAO)係在陽極氧化的基礎上,利用高電壓在微弧處理金屬工件表面產生微弧放電現象,在鋁、鎂、鈦等鈍化型輕金屬或其合金的表面上生成氧化膜經微弧氧化之金屬表面,具高硬度及良好之耐蝕性,是一新興的電化學表面處理技術。各國對於此技術的認知不同,因而有不同的名稱,如微弧放電氧化(Microarc discharge oxidation,MDO)、微電漿氧化(Microplasma oxidation,MPO)、陽極火花沉積(Anodic spark deposition)、火花放電陽極氧化(Anodischen oxidation unter funkenentladung,ANOF-process)、火花放電氧化(Spark discharge oxidation)及電漿電解氧化(Plasma electrolytic oxidation,PEO)等。Micro-arc oxidation (MAO) is based on anodizing, using micro-arcing to produce micro-arc discharge on the surface of micro-arc metal workpieces, in the surface of passivated light metals such as aluminum, magnesium and titanium or alloys thereof. The surface of the metal formed by the micro-arc oxidation of the oxide film has high hardness and good corrosion resistance, and is an emerging electrochemical surface treatment technology. Countries have different cognitions for this technology, and thus have different names, such as Microarc discharge oxidation (MDO), Microplasma oxidation (MPO), Anodic spark deposition, and spark discharge anodes. Anodischen oxidation unter funkenentladung (ANOF-process), spark discharge oxidation and plasma electrolytic oxidation (PEO).
雖然微弧氧化所得之氧化層機械特性如表面硬度、耐磨性和結合力都優於傳統陽極處理(Anodic aluminum oxide,AAO)之氧化層,但微弧氧化在裝飾性應用上卻遠遠不及傳統陽極處理,主要是因為微弧氧化層伴隨的孔洞尺寸落於微米尺度。若是以染料吸附的方式進行微弧氧化層的著色,這些微米尺度的孔洞無法讓染料牢靠的吸附在其表面上。而傳統陽極處理所形成於表面的氧化層有著六角形孔洞的堆積結構,這些奈米尺度的孔洞,具有良好的滲透性,可以將表面以有機或無機的染料浸泡,使之滲入毛細孔內,藉由不同顏色的染料,可直接在鋁合金上染出鮮豔的顏色。另外,鈦金屬則可透過發色處理,將鈦金屬放置於一些特殊的電解液中施以一定的電流或電壓後,鈦金屬表面會被電解氧化生成一非常薄的膜而具干涉光波的特性,膜本身並不具顏色,但光照射於其上時由於某些特定波長的光互相抵消的結果,因而反射光遂使得鈦金屬表面具有顏色,隨著膜厚度的增加,顏色由紅轉藍而綠,產生不同的變化。Although the mechanical properties of the oxide layer obtained by micro-arc oxidation, such as surface hardness, wear resistance and bonding force, are superior to those of the conventional anodic aluminum oxide (AAO), the micro-arc oxidation is far less than the decorative application. Conventional anodizing is mainly due to the fact that the pore size accompanying the micro-arc oxidation layer falls on the micrometer scale. If the micro-arc oxidation layer is colored by dye adsorption, these micro-scale pores do not allow the dye to adhere firmly to its surface. The oxide layer formed on the surface by the conventional anodizing treatment has a hexagonal hole packing structure. These nanometer-scale pores have good permeability, and the surface can be soaked in an organic or inorganic dye to penetrate into the capillary pores. Bright colors can be dyed directly on the aluminum alloy by dyes of different colors. In addition, titanium metal can pass through the color treatment. After the titanium metal is placed in some special electrolyte to apply a certain current or voltage, the surface of the titanium metal will be electrolytically oxidized to form a very thin film with interference light characteristics. The film itself is not colored, but when the light is irradiated thereon, as the light of certain wavelengths cancels each other, the reflected pupil causes the surface of the titanium metal to have a color, and as the thickness of the film increases, the color changes from red to blue. Green, produces different changes.
金屬發色主要為裝飾作用,經發色處理所得的金屬表面並不具特殊保護性質。微弧氧化的氧化膜層多以白色、灰白色、灰褐色和黑色系列為主。這種膜層雖然外觀漂亮,綜合性能良好,但是顏色種類受限,大大限制了輕合金的外觀性應用,特別是電子產品外殼的合金壓鑄件。消費者對表面有色彩多樣化的要求,如果能獲取顏色均勻、色彩多樣的陶瓷膜,同時還能兼有本質的優良機械保護性能,那麼微弧氧化技術的應用將會被迅速推廣。為此,世界各國無不費盡心力追求這方面的著色技術,其中大陸在微弧氧化工件的著色技術進行了相當多的嘗試,在調製電解液來達成發色的主流中,主要採用釩酸鹽電解液來進行微弧氧化,所得陶瓷膜顏色多為綠色系列,也可在電解液中添加一定量的偏釩酸銨(NH 4VO 3)來製得黑色陶瓷膜層。這種膜層雖然顏色均一,外觀良好,但膜層的綜合性能不佳,更重要的是,電解液中添加的釩酸鹽若不經特殊處理隨溶液任意排放,造成重金屬汙染,嚴重影響環境。另外,上述的實施方式還有其困難點,由於著色劑是直接添加入電解液,因此每當要換一種顏色製作微弧處理時,就必須更換電解液或再準備一個處理槽,因此就商業化的成本與其他考量,其並不符合大量生產的需求。 Metallic hair color is mainly decorative, and the metal surface obtained by the chromonic treatment does not have special protective properties. The oxide layer of micro-arc oxidation is mainly white, grayish white, taupe and black. Although the film has a beautiful appearance and good overall performance, the color type is limited, which greatly limits the appearance application of the light alloy, especially the alloy die-casting of the outer casing of the electronic product. Consumers have a variety of color requirements on the surface. If they can obtain ceramic films with uniform color and various colors, and at the same time have the excellent mechanical protection properties, the application of micro-arc oxidation technology will be rapidly promoted. To this end, all countries in the world have tried their best to pursue this color technology. Among them, the mainland has made considerable attempts in the coloring technology of micro-arc oxidation workpieces. In the mainstream of modulating electrolyte to achieve color development, vanadic acid is mainly used. The salt electrolyte is used for micro-arc oxidation, and the obtained ceramic film is mostly green in color. A certain amount of ammonium metavanadate (NH 4 VO 3 ) may be added to the electrolyte to prepare a black ceramic film layer. Although the film has uniform color and good appearance, the comprehensive performance of the film layer is not good. More importantly, the vanadate added in the electrolyte is discharged with the solution without special treatment, causing heavy metal pollution and seriously affecting the environment. . In addition, the above embodiment has its difficulty. Since the colorant is directly added to the electrolyte, it is necessary to replace the electrolyte or prepare a treatment tank every time a micro-arc process is to be replaced. Cost and other considerations, which do not meet the needs of mass production.
另一類後處理著色的嘗試可參閱中國發明專利公開號第CN101376973A號及第CN103203915A號。上述兩前案分別提出「真空濺鍍結合電泳塗裝加工微弧氧化工件工藝」與「鋁合金微弧電泳複合膜層」的技術,其主要實施的方法是先在鋁、鎂或鈦等可鈍化的金屬或其合金先以微弧氧化製備氧化層,然後在微弧氧化層上鍍金屬層後再進行電泳塗裝,或於微弧氧化層上直接電泳塗裝,此時可根據工件所需要的顏色來選取對應顏色的電泳塗料,改善習知微弧氧化層成色效果不佳的情況。但是電泳塗裝是利用電鍍原理,使得水溶性中離子化的塗料樹脂在電極上析出,從而形成不溶性塗層而覆蓋在微弧氧化層上,雖為氧化層增添色彩效果,但卻也同時失去微弧氧化層的陶瓷質感以及優越的機械性質。另外,經電泳塗裝或噴塗的有色層除了附著性堪慮之外,因為有色層具有一定的厚度,若為外觀組合件,是否會影響組裝的精密度或牢靠度,對此仍存有相當的疑慮。Another type of post-treatment coloring attempt can be found in Chinese Patent Publication No. CN101376973A and No. CN103203915A. The above two previous cases respectively proposed the technology of "vacuum sputtering combined with electrophoretic coating processing micro-arc oxidation workpiece process" and "aluminum alloy micro-arc electrophoresis composite film layer", the main implementation method is first in aluminum, magnesium or titanium. The passivated metal or its alloy is firstly prepared by micro-arc oxidation, and then the metal layer is plated on the micro-arc oxidation layer and then electrophoretic coating, or directly on the micro-arc oxidation layer, according to the workpiece The required color is used to select the electrophoretic coating of the corresponding color to improve the poor color forming effect of the conventional micro-arc oxidation layer. However, electrophoretic coating uses the principle of electroplating to cause the water-soluble ionized coating resin to precipitate on the electrode, thereby forming an insoluble coating and covering the micro-arc oxide layer. Although the color layer is added to the oxide layer, it is also lost. The ceramic texture of the micro-arc oxidation layer and superior mechanical properties. In addition, the color layer coated or sprayed by electrophoresis has a certain degree of adhesion, because the colored layer has a certain thickness, and if it is an appearance assembly, whether it will affect the precision or the degree of assembly, there is still considerable Doubt.
本發明在提供一種微弧處理金屬工件的染色方法,不僅獲取顏色均勻及色彩多樣的陶瓷氧化膜,同時還能兼有本質的優良機械保護性能之功效。The invention provides a dyeing method for a micro-arc metal workpiece, which not only obtains a ceramic oxide film with uniform color and various colors, but also has the effect of having an excellent mechanical protection performance.
本發明之目的是在提出一種微弧處理金屬工件的染色方法,包含下列步驟:提供一微弧處理金屬工件、一反應槽以及一染色槽。該微弧處理金屬工件具有一金屬基材以及一微弧氧化層,該微弧處理金屬工件具有一第一顏色,該反應槽包括有一前處理溶液,該染色槽中包括有一染色溶液,該染色溶液具有複數個陰離子染料粒子。將該微弧處理金屬工件置入該反應槽中,且將該微弧處理金屬工件全部位於該前處理溶液內。接著連接該反應槽至陽極,且連接該金屬基材至陰極,使該反應槽、該前處理溶液及該微弧處理金屬工件形成一第一迴路,對該第一迴路施以一逆向電壓,使該微弧氧化層形成複數個電荷通道。取出該微弧處理金屬工件置於一染色槽中,且將該微弧處理金屬工件全部位於該染色溶液內,連接該染色槽至陰極,且連接該金屬基材至陽極,使該染色槽、該染色溶液及該微弧處理金屬工件形成一第二迴路,並對該第二迴路施以一正向電壓,且在該金屬基材與該微弧氧化層的交界處形成正電場。正電場吸引陰離子染料粒子後,陰離子染料粒子被吸附於微弧氧化層的電荷通道內,將該微弧處理金屬工件具有一第二顏色。SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of dyeing a metal workpiece for micro-arcing comprising the steps of providing a micro-arc treated metal workpiece, a reaction vessel, and a dyeing tank. The micro-arc processed metal workpiece has a metal substrate and a micro-arc oxidation layer, the micro-arc processed metal workpiece has a first color, the reaction tank includes a pre-treatment solution, and the dyeing tank includes a dyeing solution, the dyeing The solution has a plurality of anionic dye particles. The microarc-treated metal workpiece is placed in the reaction vessel, and the micro-arc-treated metal workpiece is entirely located in the pre-treatment solution. Then connecting the reaction tank to the anode, and connecting the metal substrate to the cathode, forming a first loop of the reaction tank, the pretreatment solution and the microarc processed metal workpiece, and applying a reverse voltage to the first loop, The microarc oxidation layer is formed into a plurality of charge channels. Removing the micro-arc processed metal workpiece into a dyeing tank, and placing the micro-arc processed metal workpiece all in the dyeing solution, connecting the dyeing tank to the cathode, and connecting the metal substrate to the anode, so that the dyeing tank, The dyeing solution and the micro-arc processed metal workpiece form a second loop, and a forward voltage is applied to the second loop, and a positive electric field is formed at a boundary between the metal substrate and the micro-arc oxide layer. After the positive electric field attracts the anionic dye particles, the anionic dye particles are adsorbed in the charge channel of the micro-arc oxidation layer, and the micro-arc processed metal workpiece has a second color.
根據本發明之一較佳實施例,其中該逆向電壓為10至30伏特,該正向電壓為2至10伏特。According to a preferred embodiment of the invention, wherein the reverse voltage is 10 to 30 volts and the forward voltage is 2 to 10 volts.
根據本發明之一較佳實施例,其中對該第一迴路施以該逆向電壓後,更包含維持一反應時間,該反應時間為5至15秒。According to a preferred embodiment of the present invention, wherein the reverse voltage is applied to the first loop, it further comprises maintaining a reaction time of 5 to 15 seconds.
根據本發明之一較佳實施例,其中對該第二迴路施以該正向電壓後,更包含維持一染色時間,該染色時間為60至300秒。According to a preferred embodiment of the present invention, after applying the forward voltage to the second loop, it further comprises maintaining a dyeing time of 60 to 300 seconds.
根據本發明之一較佳實施例,其中對該第二迴路施以該正向電壓後,更包含維持一預定溫度,該預定溫度為攝氏20至60度(℃)。According to a preferred embodiment of the present invention, after applying the forward voltage to the second loop, further comprising maintaining a predetermined temperature, the predetermined temperature being 20 to 60 degrees Celsius (° C.).
根據本發明之一較佳實施例,其中該前處理溶液為一電解質溶液,該電解質溶液為一可溶性鹽類、一酸類及一鹼類其中之一或其組合而成。According to a preferred embodiment of the present invention, the pretreatment solution is an electrolyte solution, and the electrolyte solution is one of a soluble salt, an acid, and a base, or a combination thereof.
根據本發明之一較佳實施例,其中該電解質溶液的溫度為攝氏15至40度(℃)。According to a preferred embodiment of the present invention, the temperature of the electrolyte solution is 15 to 40 degrees Celsius (° C.).
根據本發明之一較佳實施例,其中該電解質溶液為一氯化鈉溶液,該氯化鈉溶液濃度為0.01至0.1莫耳濃度(M)。According to a preferred embodiment of the present invention, the electrolyte solution is a sodium chloride solution having a concentration of 0.01 to 0.1 mol (M).
根據本發明之一較佳實施例,其中該染色溶液濃度為3至15克/升(g/L)。According to a preferred embodiment of the invention, the dye solution has a concentration of from 3 to 15 grams per liter (g/L).
根據本發明之一較佳實施例,其中該染色溶液包含一陰離子型有機染料。According to a preferred embodiment of the invention, the dyeing solution comprises an anionic organic dye.
本發明將搭配圖式,為本發明的較佳實施例進行更詳細的說明。然而,此說明書中所使用任何形式之實施例僅為說明用,無法以此限制本發明。更準確地說,實施例的提供是為了使本發明更徹底和完整地說明,並對本發明所屬領域中技術人員充分傳達。The present invention will be described in more detail with reference to the preferred embodiments of the invention. However, the examples of any form used in this specification are for illustrative purposes only and are not intended to limit the invention. Rather, the embodiments are provided so that this disclosure will be more fully and fully described.
為避免現有習知技術所衍生的各項缺失,而讓微弧處理後之金屬工件更具競爭性與發展性,本發明提出一種新的微弧處理金屬工件的染色方法,藉由微弧氧化層染色前處理的方法,得到一兼具活性表層與大量電荷通道的微弧氧化層,再利用本發明中所提出的染色方法,使得此微弧氧化層可在各種顏色的有機或無機染料中進行染色,從而獲得多樣、具飽和色澤的微弧氧化層,且保有微弧處理優越的特性,使金屬工件在經微弧處理技術後仍可兼具功能與美觀的用途,進一步擴展微弧處理技術的應用領域,提升整體產業的價值。In order to avoid the defects caused by the prior art, and to make the metal workpiece after micro-arc processing more competitive and development, the present invention proposes a new micro-arc processing method for dyeing metal workpieces by micro-arc oxidation. a method of pre-dyeing treatment to obtain a micro-arc oxidation layer having an active surface layer and a large number of charge channels, and then using the dyeing method proposed in the present invention, the micro-arc oxidation layer can be used in organic or inorganic dyes of various colors. Dyeing, to obtain a variety of micro-arc oxidation layer with saturated color, and retaining the superior characteristics of micro-arc processing, so that the metal workpiece can still have both functional and aesthetic use after micro-arc processing technology, further expanding micro-arc processing The application of technology to enhance the value of the overall industry.
請參閱圖1a至圖1d所示,為本發明之微弧處理金屬工件的染色前處理方法較佳實施例示意圖。微弧處理金屬工件1係由金屬基材12與經微弧處理後所得的微弧氧化層11所組成,並具有一第一顏色,或使用其他合金做為金屬基材,但不限於此。微弧氧化層11是屬於具有大量微米尺度之開放性與封閉性孔洞的膜質結構。如圖1a所示,微弧處理金屬工件的染色前處理方法是透過將該微弧處理金屬工件1置入該反應槽2中,且將該微弧處理金屬工件1全部位於該前處理溶液21內。接著如圖1b所示,連接該反應槽2至陽極,且連接該金屬基材12至陰極,使該反應槽2、該前處理溶液21及該微弧處理金屬工件1形成一第一迴路。如圖1c及圖1d所示,該前處理溶液21與通入於微弧處理金屬工件1上的逆向電壓的交互作用下,微弧氧化層11中的開放性孔洞在電化學溶解下會產生電荷通道111之結構。電荷通道111的生成並不會損及金屬基材12以及微弧氧化層11,可保有微弧處理所擁有優異的本質特性。Please refer to FIG. 1a to FIG. 1d, which are schematic diagrams of a preferred embodiment of a pre-dyeing treatment method for a micro-arc treated metal workpiece according to the present invention. The micro-arc processed metal workpiece 1 is composed of a metal substrate 12 and a micro-arc oxidation layer 11 obtained by micro-arc treatment, and has a first color, or uses other alloys as a metal substrate, but is not limited thereto. The micro-arc oxide layer 11 is a membranous structure belonging to an open and closed pore having a large number of micrometer scales. As shown in FIG. 1a, the pre-dyeing treatment method of the micro-arc-treated metal workpiece is performed by placing the micro-arc-treated metal workpiece 1 into the reaction tank 2, and the micro-arc-treated metal workpiece 1 is entirely located in the pre-treatment solution 21 Inside. Next, as shown in FIG. 1b, the reaction tank 2 is connected to the anode, and the metal substrate 12 is connected to the cathode, so that the reaction tank 2, the pretreatment solution 21 and the microarc treated metal workpiece 1 form a first loop. As shown in FIG. 1c and FIG. 1d, the interaction between the pretreatment solution 21 and the reverse voltage applied to the microarc treated metal workpiece 1 causes the open pores in the microarc oxidation layer 11 to be electrochemically dissolved. The structure of the charge channel 111. The formation of the charge channel 111 does not damage the metal substrate 12 and the micro-arc oxide layer 11, and retains the excellent essential characteristics of the micro-arc process.
請參閱圖2a至圖2d所示,為本發明之微弧處理金屬工件的染色方法較佳實施示意圖。當整個微弧處理金屬工件1置於一染色槽3中,且將該微弧處理金屬工件1全部位於該染色溶液31內,連接該染色槽3至陰極,且連接該金屬基材12至陽極,使該染色槽3、該染色溶液31及該微弧處理金屬工件1形成一第二迴路,並將其通入正向電壓。此時正電荷會在該金屬基材12與該微弧氧化層11的交界處形成正電場,在正電場的作用下,染色溶液31中陰離子染料粒子32會被吸附在具有電荷通道111的開放性孔洞中,由於具有電荷通道111的開放性孔洞可藉由正電場有效率的吸引陰離子染料粒子32,且使陰離子染料粒子32帶有動能的被吸附於具有電荷通道111的開放性孔洞中,因此陰離子染料粒子32與具有電荷通道111的開放性孔洞中之間具有相當好的附著性,將該微弧處理金屬工件1具有一第二顏色。也就是說,製備上可透過不同的操作參數來控制所形成的電荷通道111數量與染色的時間,進而就可控制吸附陰離子染料粒子32的量,根據產生的飽和度不同,染色後的顏色外觀就會不一樣。Please refer to FIG. 2a to FIG. 2d, which are schematic diagrams showing a preferred implementation of the method for dyeing a micro-arc treated metal workpiece according to the present invention. When the entire micro-arc processed metal workpiece 1 is placed in a dyeing tank 3, and the micro-arc processed metal workpiece 1 is entirely located in the dyeing solution 31, the dyeing tank 3 is connected to the cathode, and the metal substrate 12 is connected to the anode. The dyeing tank 3, the dyeing solution 31 and the micro-arc treated metal workpiece 1 form a second loop and pass it to a forward voltage. At this time, a positive electric charge forms a positive electric field at the boundary between the metal substrate 12 and the micro-arc oxidation layer 11, and under the action of a positive electric field, the anionic dye particles 32 in the dyeing solution 31 are adsorbed to the opening having the charge channel 111. In the open pores, since the open pores having the charge channels 111 can efficiently attract the anionic dye particles 32 by the positive electric field, and the kinetic energy of the anionic dye particles 32 is adsorbed to the open pores having the charge channels 111, Therefore, there is a relatively good adhesion between the anionic dye particles 32 and the open pores having the charge channels 111, which have a second color. That is to say, the number of charge channels 111 formed and the time of dyeing can be controlled through different operation parameters, and then the amount of adsorbed anionic dye particles 32 can be controlled, and the color appearance after dyeing can be different according to the generated saturation. It will be different.
實施例一Embodiment 1
圖3為一照片,說明本發明之較佳實施例中微弧處理金屬工件染色前之狀態。此實施例以鋁合金做為金屬基材12進行微弧處理金屬工件1的染色。首先進行微弧氧化層11染色前處理工作,此實施例以鋁合金做為金屬基材12,將該微弧處理金屬工件1置入304 SS不銹鋼材質之該反應槽2中,以該反應槽2作為對電極,連接至陽極。反應槽2中的前處理溶液21為一電解質溶液,包括大多數可溶性鹽類、酸類或鹼所組成的電解質溶液。在本實施例中使用氯化鈉溶液,其濃度在0.01至0.1莫耳濃度(M),電解質溶液藉由溫度控制系統設定在攝氏15至40度(℃)之間。並對該電解質溶液進行攪拌。採用直流電源時,將該微弧處理金屬工件1設定輸入為逆向電壓10至30伏特,反應時間為5至15秒。經過上述步驟可使微弧氧化層11表層活化,並於微弧氧化層11中形成大量電荷通道111。反應完成後取出該微弧處理金屬工件1進行水洗、脫水、烘乾。Figure 3 is a photograph showing the state of the micro-arc treated metal workpiece before dyeing in the preferred embodiment of the present invention. This embodiment performs dyeing of the micro-arc treated metal workpiece 1 with an aluminum alloy as the metal substrate 12. First, the micro-arc oxidation layer 11 is pre-dyed. In this embodiment, an aluminum alloy is used as the metal substrate 12, and the micro-arc processed metal workpiece 1 is placed in the reaction tank 2 of 304 SS stainless steel, and the reaction tank is used. 2 as a counter electrode, connected to the anode. The pretreatment solution 21 in the reaction tank 2 is an electrolyte solution including an electrolyte solution composed of most soluble salts, acids or bases. In the present embodiment, a sodium chloride solution having a concentration of 0.01 to 0.1 mol (M) is used, and the electrolyte solution is set between 15 and 40 degrees Celsius (° C.) by a temperature control system. The electrolyte solution was stirred. When a DC power source is used, the micro-arc processed metal workpiece 1 is set to a reverse voltage of 10 to 30 volts, and the reaction time is 5 to 15 seconds. Through the above steps, the surface layer of the micro-arc oxidation layer 11 is activated, and a large number of charge channels 111 are formed in the micro-arc oxidation layer 11. After the reaction is completed, the micro-arc treated metal workpiece 1 is taken out for washing, dehydrating, and drying.
接著在染色溶液中進行微弧氧化層11的染色工作,染色溶液31的成分為染料(非顏料),可為任何種類的有色染料,如有機染料或無機染料等,本實施例以304 SS不銹鋼槽做為染色槽31,該染色槽31中配置紅色陰離子型有機染料,濃度為3至15克/升(g/L)。將前一個階段完成的該微弧處理金屬工件1置入該染色槽3中,連接該染色槽3至陰極,且連接該金屬基材12至陽極,將該微弧處理金屬工件1設定輸入為正向電壓2至10伏特,操作溫度為攝氏20至60度(℃),染色時間為60至300秒。染色完成後取出水洗、脫水、烘乾,完成微弧氧化層11的染色,如圖4及表一所示為紅色。其染色效果可透過色度分析測驗標準(CIE 1976 Lab) 來鑑定,未染色的微弧氧化層的Lab值為(L*a*b*)=(83.08, -0.58, 1.09),經過紅色染料染色後色度值為(L*a*b*)=(65.54, 24.05,11.32)。 表一 <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 色度值 實施例 </td><td> L* </td><td> a* </td><td> b* </td></tr><tr><td> 經微弧處理之鋁合金金屬基材 </td><td> 83.08 </td><td> -0.58 </td><td> 1.09 </td></tr><tr><td> 紅色陰離子型有機染料 </td><td> 65.54 </td><td> 24.05 </td><td> 11.32 </td></tr><tr><td> 綠色陰離子型有機染料 </td><td> 75.93 </td><td> -2.59 </td><td> 35.63 </td></tr><tr><td> 藍色陰離子型有機染料 </td><td> 52.48 </td><td> 2.98 </td><td> -36.48 </td></tr></TBODY></TABLE>Next, the dyeing work of the micro-arc oxidation layer 11 is performed in the dyeing solution. The composition of the dyeing solution 31 is a dye (non-pigment), and may be any kind of colored dye, such as an organic dye or an inorganic dye, etc., in this embodiment, 304 SS stainless steel. The tank is used as a dyeing tank 31 in which a red anionic organic dye is disposed at a concentration of 3 to 15 g/liter (g/L). The micro-arc processed metal workpiece 1 completed in the previous stage is placed in the dyeing tank 3, the dyeing tank 3 is connected to the cathode, and the metal substrate 12 is connected to the anode, and the micro-arc processed metal workpiece 1 is set as input. The forward voltage is 2 to 10 volts, the operating temperature is 20 to 60 degrees Celsius (°C), and the dyeing time is 60 to 300 seconds. After the dyeing is completed, the water is washed, dehydrated, and dried to complete the dyeing of the micro-arc oxidation layer 11, which is red as shown in FIG. 4 and Table 1. The dyeing effect can be identified by the colorimetric analysis test standard (CIE 1976 Lab). The Lab value of the undyed microarc oxidation layer is (L*a*b*)=(83.08, -0.58, 1.09), after the red dye. The chroma value after dyeing is (L*a*b*)=(65.54, 24.05, 11.32). Table I <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> Chroma Value Example</td><td> L* </td><td> a* </td><td> b* </td></tr><tr><td> Micro-arc treated aluminum alloy metal substrate</td><td> 83.08 </td><td> -0.58 </td><td> 1.09 </td></tr><tr><td> Red anionic organic dye</td><td> 65.54 </td><td> 24.05 </td>< Td> 11.32 </td></tr><tr><td> green anionic organic dye</td><td> 75.93 </td><td> -2.59 </td><td> 35.63 </td ></tr><tr><td> Blue anionic organic dye</td><td> 52.48 </td><td> 2.98 </td><td> -36.48 </td></tr> </TBODY></TABLE>
實施例二Embodiment 2
在另一實施例中,使用綠色陰離子型有機染料,依照實施例一之方法進行微弧處理金屬工件的染色,染色結果如圖4及表一所示,經過綠色染料染色後色度值 (L*a*b*)=(75.93, -2.59, 35.63)。In another embodiment, the green anionic organic dye is used, and the micro-arc metal workpiece is dyed according to the method of the first embodiment. The dyeing result is shown in FIG. 4 and Table 1. After the green dye is dyed, the chromaticity value (L) *a*b*)=(75.93, -2.59, 35.63).
實施例三Embodiment 3
在又一實施例中,使用藍色陰離子型有機染料,依照實施例一之方法進行微弧處理金屬工件的染色,染色結果如圖4及表一所示,經過藍色染料染色後色度值為 (L*a*b*)=(52.48, 2.98, -36.48)。In still another embodiment, the blue anionic organic dye is used, and the micro-arc metal workpiece is dyed according to the method of the first embodiment. The dyeing result is shown in FIG. 4 and Table 1. After the blue dye is dyed, the chromaticity value is obtained. Is (L*a*b*)=(52.48, 2.98, -36.48).
綜上所述,本發明提出一種微弧氧化層之著色技術,期望藉由此著色技術為產業在應用上提供一種不同思維與做法。本發明之技術包括一種使微弧氧化層產生電荷通道的方法與一種微弧氧化層的染色方法,透過此兩種方法即可有效的使染料附著於微弧氧化層上,以達到染色的效果。In summary, the present invention proposes a coloring technique for a micro-arc oxidation layer, and it is expected that the coloring technique provides a different thinking and practice for the industry in application. The technique of the present invention comprises a method for generating a charge channel by a micro-arc oxidation layer and a dyeing method for a micro-arc oxidation layer, and the two methods can effectively adhere the dye to the micro-arc oxidation layer to achieve the dyeing effect. .
惟以上所述者,僅為本發明之較佳實施例,但不能以此限定本發明實施之範圍;故,凡依本發明申請專利範圍及發明說明書內容所作之簡單的等效改變與修飾,皆仍屬本發明專利涵蓋之範圍內。The above is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto; therefore, the simple equivalent changes and modifications made by the scope of the present invention and the contents of the description of the invention, All remain within the scope of the invention patent.
1‧‧‧微弧處理金屬工件
11‧‧‧微弧氧化層
111‧‧‧電荷通道
12‧‧‧金屬基材
2‧‧‧反應槽
21‧‧‧前處理溶液
3‧‧‧染色槽
31‧‧‧染色溶液
32‧‧‧陰離子染料粒子1‧‧‧Micro-arc processing of metal workpieces
11‧‧‧Microarc Oxide
111‧‧‧Charge channel
12‧‧‧Metal substrate
2‧‧‧Reaction tank
21‧‧‧Pretreatment solution
3‧‧‧Dyeing tank
31‧‧‧Staining solution
32‧‧‧ Anionic dye particles
圖1a至圖1d為本發明之微弧處理金屬工件的染色前處理方法較佳實施例示意圖。 圖2a至圖2d為本發明之微弧處理金屬工件的染色方法較佳實施示意圖。 圖3為一照片,說明本發明之較佳實施例中微弧處理金屬工件染色前之狀態。 圖4為一照片,說明本發明之較佳實施例中微弧處理金屬工件染色後之結果。1a to 1d are schematic views showing a preferred embodiment of a pre-dyeing treatment method for a micro-arc treated metal workpiece according to the present invention. 2a to 2d are schematic views showing a preferred embodiment of a dyeing method for a micro-arc treated metal workpiece according to the present invention. Figure 3 is a photograph showing the state of the micro-arc treated metal workpiece before dyeing in the preferred embodiment of the present invention. Figure 4 is a photograph showing the results of dyeing a micro-arc treated metal workpiece in a preferred embodiment of the present invention.
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