TW200827490A

TW200827490A - Method for surface treating a metal article

Info

Publication number: TW200827490A
Application number: TW95148934A
Authority: TW
Inventors: Chih-Pen Lin; Yong Zhang; Zhi-Yong Rao; Zhan-Gang Zhu
Original assignee: Sutech Trading Ltd
Priority date: 2006-12-26
Filing date: 2006-12-26
Publication date: 2008-07-01

Abstract

A method for surface treating a metal article includes following steps. In a first step, a metal article with a welding surface portion is provided. In a second step, the metal article is anodized, and an anodized coating is formed on the surface of the metal article. In a third step, the metal article is immersed into an activating solution to activating the welding surface portion. In a fourth step, a coloration of the metal article is carried out in a dye solution. In a fifth step, a sealing process of the anodized coating is carried out in a sealing solution.

Description

200827490 九、發明說明：【發明所屬之技術領域】本發明係關於一種金屬工件之表面處理方法，尤其係關於一種陽極氧化處理後之金屬工件表面之染色方法。/、【先前技術】 ^ 衆所周知，鋁、鈦、鎂等合金材料具有强度高、質量輕等優點，其廣泛應用於航空、電子、通訊等領域。但貝鎮、紹、鈦等合金材料易磨損及腐钱，為了提高鎮、銘疋，鈦等合金材料表面質量，#界通常採用陽極氧化處理工获來達成。 = 陽極氧化處理後之金屬工件表面可形成具有多孔么士構之金屬氧化膜。所述之氧化膜對染料之有色成分具有声好之吸附作用1此，以所述之氧化膜為基底進—㈣^ 述之金屬卫件進行染色處理，則可使所述金屬工件具有良好之耐磨損、耐腐錄能’同時又可使所述金屬工件表面具有鮮艶之色彩。然*，對於鐳料接之金紅件而言，其焊接處存在 "·!、之缝隙’錢極氧化之過程中，陽極氧化液可滲透到 =缝隙之深處。而後續之水洗很難清除所述縫隙深處之知極氧化液，使得金屬工件焊接處容易殘留酸性陽極氧化 ^ °因此，在染色處理時，金屬工件焊接處會因殘留之酸性㈢極氧化液而染不上色或褪色。【發明内容】蓉於上述狀况，有必要提供一種改善金屬工件之焊接 200827490 處染不上色之表面處理方法。一+:種ί屬工件之表面處理方法’包括以下步驟··提供 θ \工1 ’其具有一焊接區；將所述金屬工件表面進二陽極氧化處理，以力带進订膜.將所、f冬厘彳述金屬工件表面形成-陽極氧化膜，將所述金屬工件置於一活化液中活化處理；水爷轿、+、人M k坪接£進订 /斤处金屬工件表面，·將所述金屬工件、$、、主於染色液中進行染色處理；水洗所述金屬面件= 述金屬工件表面浸潰於—封孔液中，進行封孔處理。法在戶 =2技術，本發明所述之金屬工件之表面處理方 ==縣Γ之焊接區進行活化處理，有利於避製程中滲透於其焊缝中之氧化處理液或複色。h k而防止了焊接區在染色製程中染不上色【實施方式】紹、：發::厘述之金屬工件之表面處理方法可適用於、，·、鎂至屬或其合金製品之表面處理工藝。 ^發明較佳實施方式所述之金屬工件之表面處理方法包括以下步驟：制σ提供""金屬H其可為鎂、銘、鈦等金屬或其合金衣…該金屬工件在鐳射焊接中形成有一焊接區。用氫氧化鈉溶液或碳酸鈉溶液清洗該金屬工件，以此對該金屬工件進行脫脂處理。該金屬工件進行脫脂處理後，將其置入水洗槽中清洗，去除其表面之雜質。 9 ^ 200827490 ^ 對該金屬工件表面進行化學抛光處理，清除該金屬工件表面之外觀缺陷，而獲得平滑之金屬表面。水洗該金屬工件，清除殘留之化學抛光液。化學拋光處理後之金屬表面會有一層金屬氧化物産生，即通常所稱之黑膜，因此需要在化學抛光處理後將工件進行酸洗以除去黑膜，而得到光亮、純淨之金屬表面。所述除黑膜之酸洗液可為鉻酸洗液。對該金屬工件表面實施一陽極氧化處理步驟，以使該 ⑩該金屬工件表面形成一陽極氧化膜層。該暢極氧化處理步驟之具體實施方式說明如下：用鹼性溶液，如氫氧化鈉溶液（NaOH)、碳酸鈉溶液（Na2C03)清洗該金屬工件；將該金屬工件置於陽極氧化處理槽中進行陽極氧化處理，在金屬工件表面形成陽極氧化膜。其中，陽極氧化處理溶液為重量百分比濃度為0.2〜1.0%之磷酸（H3P04 )，處理電壓為2 0〜6 0 V ’電流禮度在10〜5 0 niA/ c in之間’在室溫下處 ⑩理約20分鐘。可以理解的，該陽極氧化處理步驟之陽極氧化處理溶液也可為硫酸溶液，所述之硫酸溶液濃度可為 100〜200gA，處理電壓為8〜16V，電流密度為10〜20mA/cm2。水洗該金屬工件，清除金屬工件表面殘留之陽極氧化處理液。將陽極氧化處理後之金屬工件置於一活化液中，在室溫下使金屬工件之焊接區活化。所述活化液為硝酸溶液，所述硝酸溶液之重量百分比濃度為10%〜30%。其中，所述硝酸溶液可有效置換陽極氧化製程中滲透於所述焊接區之 200827490 m ▽焊縫之陽極氧化處理液，且易於在後續清洗製程令清除。水^該金屬工件，清除金屬工件表面之活化液。將陽極氧化處理後之金屬工件浸於盛有濃度為 1〜l〇g/l之有機染料溶液之染色槽内，所述金屬工件在染槽，處理5〜1〇分鐘。於此步驟中，所述有機染料之色素體措由物理或化學作用而吸附或填充於陽極氧化膜之結構中。、扎春水洗該金屬工件，清除金屬工件表面殘留之染料。將該金屬工件置於封孔溶液中對陽極氧化膜進行封孔處理10〜60分鐘。其中，封孔劑可為鎳鹽，如醋酸鎳或氟化鎳，封孔溶液之溫度為9〇〜96°C。經封孔處理後之金屬工件水洗後烘乾，則可獲得具有良好色澤，同時具有良好之耐磨損、耐腐蝕性能之裝飾性金屬工件。综上所述，本發明符合發明專利要件，爰依法提出專 ⑩利申請。惟，以上所述者僅為本發明之較佳實施方式，本發明之範圍並不以上述實施方式為限，舉凡孰一 …、曰个茶技藝之人士援依本發明之精神所作之等效修飾或變化，比 ^ 白應涵盍於以下申請專利範圍内。【圖式簡單說明】益 "、、【主要元件符號說明】益200827490 IX. Description of the Invention: [Technical Field] The present invention relates to a surface treatment method for a metal workpiece, and more particularly to a method for dyeing a surface of a metal workpiece after anodizing. /, [Prior Art] ^ As we all know, aluminum, titanium, magnesium and other alloy materials have the advantages of high strength and light weight, and are widely used in aviation, electronics, communications and other fields. However, alloy materials such as Beizhen, Shao, and Titanium are prone to wear and decay. In order to improve the surface quality of alloy materials such as town, Minghao, and titanium, the #界界 is usually obtained by anodizing. = The surface of the metal workpiece after anodizing can form a metal oxide film with a porous structure. The oxide film has a good sound adsorption effect on the colored component of the dye. Therefore, the metal workpiece having the oxide film as the substrate is dyed, and the metal workpiece can be made good. The wear-resistant and anti-corrosion recording energy can also make the surface of the metal workpiece have a fresh color. However, for the gold-red parts of the radium material, there is a gap in the weld at the joint. During the oxidation process, the anodizing solution can penetrate into the depth of the gap. Subsequent water washing is difficult to remove the oxidizing solution in the depth of the gap, so that the metal workpiece is likely to remain acidic anodized at the weld. Therefore, in the dyeing process, the metal workpiece is welded due to the residual acidic (three) oxidizing solution. The dye is not colored or faded. SUMMARY OF THE INVENTION In the above situation, it is necessary to provide a surface treatment method for improving the welding of metal workpieces in 200827490. A +: a surface treatment method for a workpiece is included in the following steps: • providing θ \工 1 'which has a weld zone; the surface of the metal workpiece is subjected to two anodization treatment to force the film to be bonded. , the winter 彳彳金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属金属- The metal workpiece, $, is dyed in the dyeing liquid; the metal surface is washed with water; the surface of the metal workpiece is immersed in the sealing liquid, and the sealing treatment is performed. The method of household = 2, the surface treatment of the metal workpiece according to the present invention == The welding zone of the county is activated, which is beneficial to avoid the oxidation treatment liquid or complex color which penetrates into the weld in the process. Hk prevents the soldering area from being dyed in the dyeing process [Embodiment]:::: The surface treatment method of the metal workpiece can be applied to the surface treatment of magnesium, genus or its alloy products. Process. The surface treatment method of the metal workpiece according to the preferred embodiment of the present invention comprises the following steps: σ provides "" metal H which can be a metal such as magnesium, inscription, titanium or the like thereof... the metal workpiece is in laser welding A weld zone is formed. The metal workpiece is degreased by washing the metal workpiece with a sodium hydroxide solution or a sodium carbonate solution. After the metal workpiece is degreased, it is placed in a washing tank to be cleaned to remove impurities on the surface. 9 ^ 200827490 ^ The surface of the metal workpiece is chemically polished to remove the appearance defects of the surface of the metal workpiece to obtain a smooth metal surface. The metal workpiece is washed with water to remove residual chemical polishing liquid. After the chemical polishing treatment, a metal oxide is formed on the surface of the metal, which is commonly referred to as a black film. Therefore, it is necessary to pickle the workpiece after the chemical polishing treatment to remove the black film to obtain a bright, pure metal surface. The pickling solution for removing the black film may be a chromic acid washing liquid. An anodizing treatment step is performed on the surface of the metal workpiece to form an anodized film layer on the surface of the metal workpiece. The specific embodiment of the smooth oxidation treatment step is as follows: the metal workpiece is washed with an alkaline solution such as sodium hydroxide solution (NaOH) or sodium carbonate solution (Na2C03); the metal workpiece is placed in an anodizing bath. Anodizing treatment forms an anodized film on the surface of the metal workpiece. Wherein, the anodizing treatment solution is a phosphoric acid (H3P04) having a concentration by weight of 0.2 to 1.0%, and the treatment voltage is 20 to 60 V. The current is between 10 and 50 niA/c in ' at room temperature. 10 minutes for about 20 minutes. It can be understood that the anodizing treatment solution of the anodizing treatment step may also be a sulfuric acid solution having a concentration of 100 to 200 gA, a treatment voltage of 8 to 16 V, and a current density of 10 to 20 mA/cm 2 . The metal workpiece is washed with water to remove the anodizing treatment liquid remaining on the surface of the metal workpiece. The anodized metal workpiece is placed in an activation liquid to activate the weld zone of the metal workpiece at room temperature. The activation solution is a nitric acid solution, and the concentration of the nitric acid solution is 10% to 30% by weight. Wherein, the nitric acid solution can effectively replace the anodizing treatment liquid of the 200827490 m ▽ weld which is infiltrated into the welding zone in the anodizing process, and is easy to be removed in a subsequent cleaning process. Water ^ The metal workpiece removes the activation liquid from the surface of the metal workpiece. The anodized metal workpiece is immersed in a dyeing tank containing an organic dye solution having a concentration of 1 to 1 g/l, and the metal workpiece is dyed in a tank for 5 to 1 minute. In this step, the pigment dye of the organic dye is adsorbed or filled in the structure of the anodized film by physical or chemical action. The metal workpiece is washed in the spring to remove the residual dye on the surface of the metal workpiece. The metal workpiece was placed in a sealing solution to seal the anodized film for 10 to 60 minutes. The sealing agent may be a nickel salt such as nickel acetate or nickel fluoride, and the sealing solution has a temperature of 9 〇 to 96 °C. After the metal workpiece after the sealing treatment is washed and dried, a decorative metal workpiece having good color and good wear resistance and corrosion resistance can be obtained. In summary, the present invention complies with the requirements of the invention patent, and proposes a special application for the benefit of the law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and the equivalent of the one of the techniques of the present invention is based on the spirit of the present invention. Modifications or variations, which are within the scope of the following patent application. [Simple description of the schema] Benefits ",, [Main component symbol description]

Claims

200827490 X. Patent application scope 1 · Surface treatment of a metal workpiece The following steps · · · The surface treatment method includes providing a metal workpiece having a surface tempering force on the surface of the metal workpiece Knowing that it is 仃阮矣 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The welding zone performs a living water washing on the surface of the metal workpiece; the metal workpiece is dipped in the dyeing liquid for dyeing; the surface of the metal workpiece is washed; and the surface of the metal workpiece is immersed in the sealing liquid For the surface treatment of the metal workpiece described in item 1 of the 1st 11辄利辄围, the metal ware is the metal, titanium, magnesium metal or alloy thereof.沬=The surface treatment method of the metal workpiece described in Item 1 of the patent consumption is described before the anodizing treatment step, including the treatment of the metal guard, chemical polishing Processing and steps in addition to black film processing. 4', such as: the surface treatment of the metal workpiece described in the first paragraph of the patent range = in the anodizing treatment step, the percentage concentration of the anodizing treatment liquid system is 磷酸.2~1〇% phosphoric acid solution, The treatment voltage is 2〇~6〇V, the current density is between 1〇5050cm/cm2, and it is about 20 minutes at room temperature at 200827490. The surface treatment method of the metal workpiece according to claim 1, wherein in the anodizing treatment step, the anodizing treatment liquid is a sulfuric acid solution, the sulfuric acid solution concentration is 100 to 200 gA, and the treatment voltage is 8~16V, current density is 10~20mA/cm2. 6. The surface treatment method for a metal workpiece according to claim 1, wherein the activation liquid is a nitric acid solution. • The surface treatment method of the metal workpiece as described in claim 6 wherein the concentration of the nitric acid solution is from 1% to 3% by weight. • The surface treatment of the metal workpiece as described in the scope of patent application 帛1, wherein the dyeing liquid concentration is iqOgd 9 organic dye solution, and the treatment time is 5 to 10 minutes. The surface treatment of the metal workpiece according to item 1 of the scope of the invention is as follows: the sealing agent is a nickel salt solution, and the recording is selected from nickel acetate or nickel fluoride. 1 stay 10 · If the patent application scope flute method, the surface treatment of the metal workpiece described in item i, ten, f, c, closed Luli gentleman η day, the temperature of the sealing hole liquid is 90~96 The closing time is 10 to 60 minutes.