KR101401365B1 - Method of surface treatment for mg alloys goods having glossy - Google Patents
Method of surface treatment for mg alloys goods having glossy Download PDFInfo
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Abstract
Description
본 발명은 마그네슘합금 제품의 표면에 광택을 가지도록 하기 위한 표면처리방법에 관한 것으로서, 더욱 상세하게는 마그네슘합금 제품의 표면을 신속하고도 균일하게 처리함과 아울러 표면에 광택을 구현할 수 있도록 하는 마그네슘합금 제품의 표면처리방법에 관한 것이다.The present invention relates to a surface treatment method for polishing a surface of a magnesium alloy product, and more particularly, to a surface treatment method for polishing a surface of a magnesium alloy product by rapidly and uniformly treating a surface of the magnesium alloy product, The present invention relates to a surface treatment method of an alloy product.
일반적으로 마그네슘합금는 치수 안정성이 우수하고, 미강도, 전자기파 차폐성, 진동 감쇄 등이 알루미늄 합금과 철강에 비하여 우수하여 자동차와 항공기용 부품, 휴대폰 케이스, 노트북 컴퓨터 케이스, 안경테 등에 많이 사용되고 있으며, 표준 전극 단위가 낮고 내식성이 취약하여 부식 방지를 위하여 표면 처리하게 된다.In general, magnesium alloy has excellent dimensional stability and is superior to aluminum alloy and steel in terms of low strength, electromagnetic wave shielding, and vibration damping, and is widely used in automobile and aircraft parts, mobile phone cases, notebook computer cases, And the surface is treated to prevent corrosion due to its weak corrosion resistance.
그리고 마그네슘합금은 산화가 잘되는 금속이므로 전처리 과정인 표면처리공정이 필수적으로 필요하며, 이러한 마그네슘합금을 재질로 하는 제품을 표면 처리하기 위하여, 아노다이징(anodizing), 플라즈마 전해 산화(Plasma Electrolytic Oxidation) 등과 같은 습식 표면처리방법과 아크코팅 등과 같은 건식 표면처리방법이 개발되었다.Since the magnesium alloy is a well-oxidized metal, a surface treatment process, which is a pretreatment process, is indispensably required. In order to treat a product made of such a magnesium alloy, anodizing, plasma electrolytic oxidation Dry surface treatment methods such as wet surface treatment methods and arc coatings have been developed.
즉 마그네슘합금 제품의 표면을 표면처리하여 MgO 등의 박막층을 형성하게 된다.That is, the surface of the magnesium alloy product is surface-treated to form a thin film layer such as MgO.
다시 말하면 습식 표면처리방법에 사용되는 전해액은 수산화나트륨(NaOH)을 주로 사용하고 있으며, 상기 수산화나트륨에서 분리되는 수산기(OH-)가 마그네슘합금 제품의 표면층에 결합하는 바, 이렇게 형성된 산화피막 내부에서 형성되는 강한 전류장으로 산화물을 형성하여 마그네슘합금 제품의 표면층에 MgO과 Mg(OH)2박막층을 형성하게 된다.In other words, sodium hydroxide (NaOH) is mainly used as the electrolytic solution used in the wet surface treatment method, and the hydroxyl group (OH-) separated from the sodium hydroxide binds to the surface layer of the magnesium alloy product. The MgO and Mg (OH) 2 thin film layers are formed on the surface layer of the magnesium alloy product by forming oxides with a strong current field to be formed.
그러나 습식 표면처리방법은 마그네슘합금 제품의 표면층에 산화 박막층을 형성하는 시간이 많이 소요되어 제품의 표면을 보다 신속하게 처리할 수 없었다는 단점이 있다.However, the wet surface treatment method is disadvantageous in that it takes much time to form an oxide thin film layer on the surface layer of the magnesium alloy product, and the surface of the product can not be treated more quickly.
그래서 종래에는 건식 표면처리방법을 이용하여 마그네슘합금 제품의 표면층에 산화 박막층을 형성하는 기술이 개발되어, 각종 이온 플레이팅 장비 개발과 공정 개발에 의해 아크코팅, 스퍼터링 및 HCD 코팅, 고기능 내마성 코팅 기술이 있으나, 이러한 종래의 기술은 마그네슘합금 제품의 표면층에 산화 박막층을 보다 균일하게 형성하지 못했다는 단점이 있다.Therefore, in the past, a technique of forming an oxide thin film layer on the surface layer of a magnesium alloy product by using a dry surface treatment method has been developed. By developing various ion plating devices and developing a process, arc coating, sputtering and HCD coating, However, such a conventional technique has a disadvantage in that it can not form an oxide thin film layer on the surface layer of the magnesium alloy product more uniformly.
이러한 종래의 단점을 개선하기 위하여, 종래에는 본 출원인에 의해 특허출원 제10-2009-0083421호로 출원된 기술이 개발되었는 바, 이는 마그네슘합금 표면에 묻은 기름 등과 같은 이물질을 제거 및 세척한 후에 메탄올(CH3OH), 아세톤(CH3COCH3), 클로로에틸 에테르((ClC2H4)2O), 다이아세톤 알코올(CH3COCH2COH(CH3)2 ), 디메틸글리옥심((CH3)2C2(NOH)2 )을 혼합한 용액으로 마그네슘합금 표면을 분사 처리하여 직화 방식으로 표면에 산화막을 형성하는 것으로 이루어지며, 이러한 기술은 직화에 의하여 표면 처리하는 시간이 매우 단축될 수 있어 마그네슘합금 제품의 표면에 산화 박막층을 신속하게 형성할 수 있고, 마그네슘합금 제품의 표면 전체에 표면처리용액을 균일하게 분사한 뒤에 신속하게 직화 방식으로 산화할 수 있어 산화 박막층을 균일하게 형성할 수 있는 것이다.In order to solve such conventional disadvantages, a technology filed by the present applicant with a patent application No. 10-2009-0083421 has been developed in the prior art, which is to remove foreign substances such as oil and the like on the surface of a magnesium alloy, (CH3COCH2COH (CH3) 2), and dimethylglyoxime ((CH3) 2C2 (NOH) 2) were mixed with a solution of magnesium chloride (CH3OH), acetone (CH3COCH3), chloroethylether And the oxide film is formed on the surface by a direct-burning method. This technique can shorten the time required for the surface treatment by the direct burning so that the oxide thin film layer can be formed quickly on the surface of the magnesium alloy product, The surface treatment solution can be uniformly sprayed on the entire surface of the alloy product and then oxidized in a flame direct manner so that the oxide thin film layer can be uniformly formed The.
그러나 본 출원인에 의해 개발된 종래의 기술은 마그네슘합금 표면에 분사되는 혼합물의 구성 물질이 많아서 각각의 구성 물질을 취급하는 것이 불편하다는 단점이 있다.However, the conventional technique developed by the present applicant has a disadvantage in that it is inconvenient to handle each constituent material because the constituent material of the mixture to be sprayed on the surface of the magnesium alloy is large.
본 발명은 상기와 같은 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 마그네슘합금 제품의 표면에 분사되는 표면처리용액의 구성물을 단순화하여 산화 박막층을 형성함으로써, 마그네슘합금 제품의 표면을 신속하고도 균일하게 처리함과 아울러 표면에 광택을 구현할 수 있는 마그네슘합금 제품의 직화식 표면처리방법을 제공하는 데 있다.SUMMARY OF THE INVENTION It is an object of the present invention to simplify the structure of a surface treatment solution sprayed on a surface of a magnesium alloy product to form an oxide thin film layer, Which is capable of rapidly and uniformly treating the surface of a magnesium alloy product and achieving glossiness on the surface thereof.
상기와 같은 목적을 달성하기 위하여, 본 발명은 마그네슘합금 제품의 표면의 유지를 제거하고, 마그네슘합금 제품의 표면의 유지를 제거하기 위한 물질을 제거 및 중화함과 아울러 이를 세척한 마그네슘합금 제품을 표면 처리하는 것으로 이루어지는 표면 광택을 가진 마그네슘합금 제품의 표면처리방법에 있어서, 세척된 마그네슘합금의 제품의 표면에 물과 에탄올(C2H5OH), 아세톤(CH3COCH3)을 혼합한 표면처리용액을 분사하는 표면처리용액분사단계; 상기 표면처리용액분사단계에서 처리된 마그네슘합금 제품을 200 ~ 260℃의 내부공간을 구비한 직화기에 넣어서 10 ~ 15초동안 직화 처리하여 마그네슘합금 제품의 표면에 산화 박막층을 형성하는 직화처리단계; 상기 직화처리단계에서 처리된 마그네슘합금 제품을 에탄올로 세척한 뒤 이를 건조하는 세척건조단계; 그리고 상기 세척건조단계에서 처리된 마그네슘합금 제품의 표면에 형성된 산화 박막층 위에 전기 착색 방식으로 전착층을 형성하는 전기착색단계를 포함하여 이루어지는 표면 광택을 가진 마그네슘합금 제품의 표면처리방법을 제공한다.In order to accomplish the above object, the present invention provides a magnesium alloy product removing surface of the magnesium alloy product, removing and neutralizing the material for removing the surface of the magnesium alloy product, (C 2 H 5 OH) and acetone (CH 3 COCH 3 ) is mixed with the surface of a product of a magnesium alloy which has been cleaned, A surface treatment solution spraying step of spraying a solution; A direct-fire treatment step of putting the magnesium alloy product treated in the surface-treating solution injection step into a fire extinguisher having an internal space of 200 to 260 ° C and performing a direct fire treatment for 10 to 15 seconds to form an oxide thin film layer on the surface of the magnesium alloy product; A washing and drying step of washing the magnesium alloy product treated in the flue gas treating step with ethanol and drying the magnesium alloy product; And an electrodeposition step of forming an electrodeposited layer on an oxidized thin film layer formed on the surface of the magnesium alloy product treated in the washing and drying step.
더우기 상기 직화처리단계로 처리하지 않고 상기 표면처리용액분사단계에서 처리된 마그네슘합금 제품을 150 ~ 200℃의 내부공간을 구비한 열처리기에 넣어서 5 ~ 20분동안 열처리하는 열처리단계를 포함할 수 있다.In addition, the method may further include a heat treatment step of heating the magnesium alloy product treated in the surface treatment solution injection step for 5 to 20 minutes by inserting the magnesium alloy product into the heat treatment furnace having an internal space of 150 to 200 ° C without performing the treatment with the above-mentioned direct heat treatment step.
또한 상기 표면처리용액은 물과 에탄올(C2H5OH), 아세톤(CH3COCH3)을 혼합하되, 상기 에탄올을 물 부피의 1 ~ 50배를 혼합함과 아울러 상기 아세톤을 에탄올 부피의 0.05 ~ 1배를 혼합한 용액이다.The surface treatment solution is prepared by mixing water with ethanol (C 2 H 5 OH) and acetone (CH 3 COCH 3 ), mixing the ethanol with water in an amount of 1 to 50 times, mixing the acetone with 0.05 ~ 1 fold of the solution.
이와 같이 이루어지는 표면 광택을 가진 마그네슘합금 제품의 표면처리방법은 마그네슘합금 표면에 묻은 기름 등과 같은 이물질을 제거 및 세척한 후에 물과 에탄올(C2H5OH), 아세톤(CH3COCH3)을 혼합한 용액으로 마그네슘합금 표면을 분사 처리하여 직화 방식 또는 열처리 방식으로 표면에 산화 박막층을 형성하기 때문에, 직화 또는 열처리에 의하여 표면 처리하는 시간이 매우 단축될 수 있어 마그네슘합금 제품의 표면에 산화 박막층을 신속하게 형성할 수 있고, 마그네슘합금 제품의 표면 전체에 표면처리용액을 균일하게 분사한 뒤에 신속하게 직화 방식 또는 열처리 방식으로 표면을 산화할 수 있어 산화 박막층을 균일하게 형성할 수 있다는 이점이 있다.The surface treatment method of a magnesium alloy product having such a surface gloss is a method of removing foreign substances such as oil and the like on the surface of a magnesium alloy and then mixing water with ethanol (C 2 H 5 OH) and acetone (CH 3 COCH 3 ) Since the surface of the magnesium alloy is sprayed with a solution to form an oxide thin film layer on the surface by the direct method or the heat treatment method, the time required for the surface treatment by the direct heat treatment or the heat treatment can be shortened, The surface of the magnesium alloy product can be uniformly sprayed on the entire surface of the magnesium alloy product, and then the surface can be rapidly oxidized by the direct firing method or the heat treatment method. Thus, the oxide thin film layer can be uniformly formed.
더우기 마그네슘합금 제품의 표면에 형성된 산화 박막층 위에 전기착색 방식으로 전착층을 형성하여 마그네슘합금 제품의 표면에 유색 광택을 구현할 수 있을 뿐만 아니라 Hair-line 표면처리 염수분무 한계시험 방식으로 실험한 결과 마그네슘합금 제품의 표면에 형성된 전착층의 표면 광택이 오랫동안 유지됨을 알 수 있었다.In addition, it is possible to form an electrodeposited layer on an oxide thin film layer formed on the surface of a magnesium alloy product to form an electrodeposited layer on the surface of a magnesium alloy product, as well as a hair-line surface-treated salt water spray limit test. As a result, The surface gloss of the electrodeposited layer formed on the surface of the product was maintained for a long time.
도 1은 본 발명에 의한 표면 광택을 가진 마그네슘합금 제품의 표면처리방법으로 표면 처리한 마그네슘합금 제품의 단면을 확대한 사진이다.
도 2와 도 3은 본 발명에 의한 표면 광택을 가진 마그네슘합금 제품의 표면처리방법으로 표면 처리한 마그네슘합금 제품의 샘플을 각각 나타내는 평면도이다.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged cross-sectional view of a magnesium alloy product surface-treated by a surface treatment method of a magnesium alloy product having a surface gloss according to the present invention. FIG.
FIGS. 2 and 3 are plan views respectively showing samples of a magnesium alloy product surface-treated by a surface treatment method of a magnesium alloy product having a surface gloss according to the present invention.
이하 본 발명에 의한 표면 광택을 가진 마그네슘합금 제품의 표면처리방법의 바람직한 실시예를 상세하게 설명한다.Hereinafter, a preferred embodiment of a surface treatment method of a magnesium alloy product having surface gloss according to the present invention will be described in detail.
본 발명은 마그네슘합금 제품(이하 '제품'이라 약칭함)의 표면을 처리하는 것이며, 일정한 온도를 유지하는 내부 공간을 구비한 직화기 또는 열처리기로 표면 처리하기 전에 제품의 표면에 묻은 기름이나 떼를 제거하게 된다.The present invention is to treat the surface of a magnesium alloy product (hereinafter abbreviated as "product"), and it is possible to use oil or a droplet on the surface of the product before the surface treatment with a fire extinguisher or a heat treatment machine having an internal space maintaining a constant temperature .
즉 본 발명에서는 종래와 마찬가지로 마그네슘합금 제품의 표면의 유지를 제거하고, 마그네슘합금 제품의 표면의 유지를 제거하기 위한 물질을 제거 및 중화함과 아울러 이를 세척한 마그네슘합금 제품을 표면 처리하게 된다.That is, in the present invention, the surface of the magnesium alloy product is removed, the material for removing the surface of the magnesium alloy product is removed and neutralized, and the magnesium alloy product is cleaned.
일정한 온도를 유지하는 내부 공간을 구비한 직화기 또는 열처리기로 표면 처리하기 전, 예컨대 제품의 표면에 묻은 기름이나 떼를 제거하기 위하여 탈지단계와 트리클로로에틸렌제거단계, 아세톤중화단계, 세척단계로 마그네슘합금 제품을 전처리하는 것이다.Before the surface treatment with a flame retarder or a heat treatment machine having an internal space for maintaining a constant temperature, for example, in order to remove oil or herd from the surface of the product, degreasing step, trichlorethylene removal step, acetone neutralization step, Alloy products.
제품의 표면의 유지를 제거하는 탈지단계에서는 제품을 트리클로로에틸렌(C2HCl3,trichloroethylene(TCE))용액으로 처리하는 것이다.In the degreasing step, which removes the surface of the product, the product is treated with a solution of trichlorethylene (C 2 HCl 3 , trichlorethylene (TCE)).
참고로 트리클로로에틸렌( C2HCl3, trichloroethylene(TCE))은 달콤한 냄새를 풍기는 무색 투명한 액체로서, 사업장에서 금속기계 부품의 탈유지 세정제, 금속 표면의 건조, 섬유공업에서의 세척과 염색, 일반 용해제, 라커의 희석제, 유리나 광학기구의 세척제 및 피혁의 지방 제거제 등으로 사용되는 유기용제이다.As a reference, trichlorethylene (C 2 HCl 3 , trichlorethylene (TCE)) is a colorless transparent liquid that gives off a sweet smell. It is used for cleaning and dyeing in the textile industry, drying An organic solvent used as a solvent, a diluent for a lacquer, a cleansing agent for glass or an optical instrument, and a fat removing agent for leather.
이러한 트리클로로에틸렌으로 마그네슘합금 제품인 자동차와 항공기용 부품, 휴대폰 케이스, 노트북 컴퓨터 케이스, 안경테 등의 표면에 묻은 기름 등을 제거한다.These trichlorethylene are used to remove magnesium alloy products such as automobile and aircraft parts, mobile phone cases, notebook computer cases, and oil on the surface of eyeglass frames.
상기 탈지단계에서 기름 등이 탈지된 제품의 표면에 묻은 트리클로로에틸렌을 제거하게 되는 바, 이러한 트리클로로에틸렌제거단계에서는 상기 탈지단계에서 탈지된 제품을 아세톤 용액으로 처리하여 표면의 트리클로로에틸렌 용액을 제거하는 것이다.In the degreasing step, the trichlorethylene removed on the surface of the degreased product such as oil is removed. In the trichlorethylene removal step, the degreased product is treated with an acetone solution to remove the trichlorethylene solution on the surface. To remove it.
그리고 아세톤으로 처리된 제품을 물로 세척하기 위하여 제품에 묻은 아세톤을 중화할 필요가 있는 바, 아세톤중화단계에서 상기 크리클로로에틸렌제거단계에서 처리된 아세톤을 메탄올 용액으로 처리하여 제품의 표면의 아세톤을 중화하게 된다.In order to clean the acetone-treated product with water, it is necessary to neutralize acetone adhered to the product. In the acetone neutralization step, the acetone treated in the step of removing the chlorochloroethylene is treated with a methanol solution to neutralize the acetone on the product surface .
참고로 메탄올(CH3OH)은 가장 간단한 구조의 알코올로서 메틸알코올이라고도 하고, 목재의 건류로 얻어진 목초액에서 얻어졌기 때문에 목정(木精；wood spirit)이라고도 하며, 살리실산 등 각종 카르복시산의 메틸에스테르형 또는 각종 메틸에테르형으로서 여러 가지 천연물에 함유되어 있다.Methanol (CH 3 OH) is the simplest alcohol, also known as methyl alcohol, and is also called wood spirit because it is obtained from wood vinegar obtained by the dry distillation of wood. It is a methyl ester type of various carboxylic acids such as salicylic acid, Various types of methyl ether are contained in various natural products.
메탄올은 무색 투명하고 특유의 방향이 있는 휘발성 액체이고, 물, 에탄올, 벤젠, 에테르 등과 같은 용매와 잘 혼합되며, 가솔린에 혼입하여 자동차의 내한연료(耐寒燃料)로서 사용되고, 에탄올에 혼입하여 변성알코올로서도 사용된다.Methanol is a colorless, transparent, volatile liquid with a unique orientation and is well mixed with solvents such as water, ethanol, benzene, ether and the like. It is mixed with gasoline and used as cold fuel for automobiles. It is mixed with ethanol, .
제품의 표면에 묻은 아세톤을 메탄올로 중화한 뒤, 세척할 필요가 있는 바, 세척단계에서는 상기 아세톤중화단계에서 처리된 제품을 물로 세척한 뒤에 물기를 제거한다.After the acetone adhered to the surface of the product is neutralized with methanol, it is necessary to clean the product. In the washing step, the product treated in the acetone neutralization step is washed with water and then the water is removed.
그리고 상기 세척단계에서 세척된 제품을 직화기 또는 열처리기에 넣기 전에 마지막으로 제품의 표면을 원활하게 처리하기 위하여, 표면처리용액을 제품의 표면에 분사하는 표면처리용액분사단계를 진행한다.Finally, in order to smoothly treat the surface of the product, the surface treatment solution injecting step for spraying the surface treatment solution onto the surface of the product is performed before the cleaned product is introduced into the fire extinguisher or the heat treatment apparatus.
상기 표면처리용액분사단계에 사용되는 표면처리용액은 물과 에탄올(C2H5OH), 아세톤(CH3COCH3)을 혼합한 단순한 물질로 창안되었는 바, 이는 상기 에탄올을 물 부피의 1 ~ 50배를 혼합함과 아울러 상기 아세톤을 에탄올 부피의 0.05 ~ 1배를 혼합한 용액이다.The surface treatment solution used in the surface treatment solution injecting step is a simple substance in which water, ethanol (C 2 H 5 OH), and acetone (CH 3 COCH 3 ) are mixed, 50 times, and the acetone is mixed with 0.05 to 1 times the volume of ethanol.
여기서 상기 에탄올은 화염의 안정성과 얼룩 제거에 영향을 미칠 뿐만 아니라 물의 표면 장력을 저하시키는 것으로서, 에탄올을 물 부피의 1배보다 작게 혼합하면 수산기(OH-)의 부족으로 인하여 산화피막 내부에서 형성되는 전류장의 부족이 발생되어 마그네슘합금 제품의 표면층에 MgO과 Mg(OH)2인 산화 박막층이 원활하게 형성되지 못할 뿐만 아니라 물의 표면 장력으로 인하여 제품의 표면에 분사된 표면처리용액이 제품의 표면에 균일하게 분포되지 못하여 얼룩의 발생을 초래하게 된다.Here, the ethanol not only affects flame stability and stain removal but also lowers the surface tension of water. When ethanol is mixed with less than 1 volume of water, it is formed in the oxide film due to lack of hydroxyl group (OH-) There is a shortage of current field, so that MgO and Mg (OH) 2 oxide film layers are not smoothly formed on the surface layer of the magnesium alloy product, and the surface treatment solution sprayed on the product surface due to the surface tension of water is uniform So that the occurrence of stains is caused.
또한 에탄올을 물 부피의 50배보다 많이 혼합하면 MgO인 산화 박막층이 물로 인하여 형성되기는 쉬우나 불필요한 수산기(OH-)가 많을 뿐만 아니라 물과 에탄올의 끓는 점의 안정성이 떨어질 수 있어 균일한 산화 박막층을 형성하는 것에 악영향을 미친다.Also, when ethanol is mixed more than 50 times the volume of water, it is easy for the oxide thin film layer of MgO to be formed due to water, but it is not only a lot of unnecessary hydroxyl groups (OH-), but also the stability of boiling point of water and ethanol may be lowered to form a uniform thin oxide layer It is adversely affecting.
참고로 에탄올(ethanol)(C2H5OH) 또는 에틸 알코올(ethyl alcohol)은 무색의 가연성 화합물로 알코올의 한 종류이며, 상온에서는 무색의 액체로 존재하고, 태울 때 투명하고 옅은 푸른색을 띤 화염을 발생시키며, 성질 특유의 냄새와 맛이 있고, 수소 결합을 하고, 녹는점은 -114.5°C, 끓는점은 78.32°C이고, 물, 다른 알코올, 에테르, 케톤, 클로로폼 등에 녹을 수 있으며, 증기가 폭발성이어서 일부 내연기관에서 연료로 사용될 수 있고, 용매, 소독제, 연료 등으로 많이 사용된다.For reference, ethanol (C 2 H 5 OH) or ethyl alcohol is a colorless flammable compound, a kind of alcohol, present as a colorless liquid at normal temperature, transparent and pale blue It has a characteristic odor and taste, hydrogen bonding, melting point of -114.5 ° C and boiling point of 78.32 ° C. It can be dissolved in water, other alcohol, ether, ketone, chloroform, etc., The steam is explosive and can be used as fuel in some internal combustion engines and is often used as a solvent, disinfectant, fuel and so on.
한편 상기 아세톤은 화염 온도와 지속성, 에탄올 화력의 균일성과 표면처리 시간의 단축에 영향을 미치는 바, 아세톤을 에탄올 부피의 0.05배보다 작게 혼합하면 에탄올 화력을 균일하게 하지 못하여 산화 박막층의 두께를 균일하게 하지 못하며, 아세톤을 에탄올 부피의 1배보다 많이 혼합하면 아세톤의 불필요한 양으로 인하여 표면처리 시간의 단축에 악영향을 미칠 뿐만 아니라 기포 발생으로 인하여 오히려 표면의 균일성을 떨어뜨릴 수 있다.On the other hand, the above acetone affects the flame temperature and persistence, the uniformity of the ethanolic power and the shortening of the surface treatment time. When the acetone is mixed with less than 0.05 times the ethanol volume, the ethanolic power can not be uniformized, If the amount of acetone is more than 1 times the volume of ethanol, the unnecessary amount of acetone may adversely affect the shortening of the surface treatment time, and the uniformity of the surface may be lowered due to the bubbles.
참고로 아세톤(CH3COCH3)은 물, 알코올, 에테르 등 대부분의 용매와 잘 섞이며, 상온에서 휘발성이 강하므로 인화성이 크며, 대부분의 환원제에 의하여 아이소프로필 알코올이 되고, 아말감 나트륨과는 테트라메틸에틸렌 글리콜을 생성하고, 이크롬산 나트륨과 황산과의 반응으로 아세트산과 이산화탄소를 생성하며, 암모니아와 반응하여 다이아세톤아민 등과 같은 아세톤 아민을 생성한다.For reference, acetone (CH 3 COCH 3 ) is mixed with most solvents such as water, alcohol, ether, etc., and is highly volatile at room temperature, so it is highly flammable. It is converted to isopropyl alcohol by most reducing agents, Methyl ethyleneglycol is produced, acetic acid and carbon dioxide are produced by reaction with sodium chromate and sulfuric acid, and react with ammonia to produce acetone amine such as diacetone amine.
그리고 아세톤은 용매중 하나로서 플라스틱이나 셀룰로오스 도료 제작에 널리 쓰이고, 아세틸렌을 녹여 저장하는 용도로도 사용되며, 유기 합성의 원료로도 사용되며 아세톤으로부터 생성되는 대표적인 화합물은 용매, 시너 등으로 사용되는 다이아세톤 알코올이며, 실생활에서는 물과 유기용매 모두에 대해서 잘 녹아서 페인트와 같이 물로 세척되지 않는 물질을 세척하게 된다.Acetone is one of the solvents widely used for the production of plastics and cellulose coatings. It is also used for dissolving acetylene and storing it. It is also used as a raw material for organic synthesis. Typical compounds produced from acetone include di Acetone alcohol. In real life, it is well soluble in both water and organic solvents, washing substances that do not wash with water, such as paint.
한편 상기 표면처리용액분사단계에서 처리된 제품을 직화처리단계와 열처리단계 중의 어느 한 단계와 세척건조단계, 전기착색단계로 처리하여 유색 광택을 구비한 표면 처리를 완료하게 된다.On the other hand, the product treated in the surface treatment solution injecting step is subjected to any one of the flame treatment step and the heat treatment step, the washing and drying step, and the electro-coloring step to complete the surface treatment with colored glossy.
상기 직화처리단계에서는 200 ~ 260℃의 내부공간을 구비한 직화기에 넣어서 10 ~ 15초동안 직화 처리하게 되며, 온도가 200℃보다 낮으면 표면 처리 시간이 지연될 뿐만 아니라 제품의 표면에 산화 박막층이 쉽게 발생하지 않게 되고, 온도가 260℃보다 높으면 제품에 함유된 마그네슘으로 인하여 제품의 표면 상태가 균일하지 못하게 된다.When the temperature is lower than 200 ° C, the surface treatment time is delayed and an oxide thin film layer is formed on the surface of the product. If the temperature is higher than 260 ° C, the surface state of the product is not uniform due to the magnesium contained in the product.
물론 직화기는 열원이 직접적으로 제품에 도달하게 되는 것이므로, 직화 시간을 10보다 짧으면 산화막이 쉽게 발생되지 않으며, 15초보다 길면 제품의 표면의 질을 떨어뜨릴 수 있는 것이다.Of course, since the heat source directly reaches the product, if the flame time is shorter than 10, the oxide film is not easily generated, and if it is longer than 15 seconds, the surface quality of the product can be lowered.
또한 본 발명에서는 상기 직화처리단계 대신에 열처리단계로 제품의 표면에 묻은 표면처리용액을 반연소시키는 열처리단계로 처리할 수 있다.In addition, in the present invention, the heat treatment step may be a heat treatment step in which the surface treatment solution adhered to the surface of the product is semi-burned in the heat treatment step instead of the direct heat treatment step.
즉 상기 열처리단계는 상기 표면처리용액분사단계에서 처리된 마그네슘합금 제품을 150 ~ 200℃의 내부공간을 구비한 열처리기에 넣어서 5 ~ 20분 동안 열처리하게 되며, 온도가 150℃보다 낮으면 반연소 상태를 유지할 수 없어 표면 처리 시간이 지연될 뿐만 아니라 제품의 표면에 산화 박막층이 쉽게 발생하지 않게 되고, 온도가 200℃보다 높은 상태로 처리하는 것은 상기 직화처리단계가 보다 효율적이므로 불필요한 온도와 시간을 낭비할 필요가 없는 것이다.That is, in the heat treatment step, the magnesium alloy product treated in the surface treatment solution injection step is put into a heat treatment apparatus having an internal space of 150 to 200 ° C. and heat-treated for 5 to 20 minutes. When the temperature is lower than 150 ° C., The surface treatment time is delayed and the oxidized thin film layer is not easily generated on the surface of the product. If the temperature is higher than 200 ° C, the above flame treatment step is more efficient and unnecessary temperature and time are wasted You do not need to.
물론 상기 열처리단계는 상기 직화처리단계보다 처리 시간이 많이 소요되나, 제품의 표면에 있는 표면처리용액을 직화처리단계보다 원활하게 제거할 수 있는 것이며, 열처리기는 열원이 간접적으로 제품에 도달하게 되는 것이므로, 열처리 시간을 5분보다 짧으면 산화막이 쉽게 발생되지 않으며, 20분 이내에서 표면처리용액을 완전히 제거할 수 있으므로 20분보다 길게 열처리할 필요가 없는 것이다.Of course, the heat treatment step requires a longer processing time than the flame treatment step, but the surface treatment solution on the surface of the product can be removed more smoothly than the direct treatment step, and the heat source indirectly reaches the product If the heat treatment time is shorter than 5 minutes, the oxide film is not easily generated, and since the surface treatment solution can be completely removed within 20 minutes, it is not necessary to heat treatment longer than 20 minutes.
상기와 같이 제품에 표면에 산화 박막층을 형성한 뒤, 상기 세척건조단계에서는 상기 직화처리단계 또는 열처리단계에서 처리된 마그네슘합금 제품을 에탄올로 세척한 뒤 이를 건조하게 되며, 마그네슘합금 제품을 에탄올로 세척한 뒤 이를 건조한 뒤에는 전기착색단계로 산화 박막층 위에 전착층을 형성하게 된다.After forming the oxide thin film layer on the surface of the product as described above, in the washing and drying step, the magnesium alloy product treated in the flame treatment step or the heat treatment step is washed with ethanol and dried, and the magnesium alloy product is washed with ethanol After drying, the electrodeposition layer is formed on the oxide thin film layer by the electrophotographic step.
즉 상기 전기착색단계는 종래에 공지된 전기착색방식으로 전착층을 형성하는 바, 상기 세척건조단계에서 처리된 마그네슘합금 제품의 표면에 형성된 산화 박막층 위에 전기 착색 방식으로 전착층을 형성하는 것이며, 종래에 많이 공지되어 있으므로 이의 설명을 생략한다.That is, the electrochromic step forms an electrodeposited layer by a conventionally known electrochromic system, and forms an electrodeposited layer on an oxidized thin film layer formed on the surface of the magnesium alloy product treated in the washing and drying step, And therefore, the description thereof will be omitted.
아무튼 본 발명에서는 상기 전기착색단계의 전착층의 두께는 10 ~ 24㎛ 임을 특징으로 하며, 이러한 두께는 표면 광택과 내구성, 처리 비용을 고려한 최적의 두께인 것이다.However, in the present invention, the thickness of the electrodeposition layer in the electrochromic step is 10 to 24 占 퐉, and the thickness is an optimum thickness considering the surface gloss, durability, and processing cost.
이와 같이 이루어지는 본 발명에 의한 표면 광택을 가진 마그네슘합금 제품의 표면처리방법으로 처리된 제품은 도 1에 도시한 바와 같이 마그네슘합금 제품(1)의 표면에 산화 박막층(2)이 형성되고, 상기 산화 박막층(2) 위에 전착층(3)이 보다 균일하게 형성되어 전착층으로 인하여 제품의 표면에 광택이 구현된다.As shown in FIG. 1, the product treated with the surface treatment method of the magnesium alloy product having the surface gloss according to the present invention has the oxide thin film layer 2 formed on the surface of the magnesium alloy product 1, The
특히 도 2와 도 3에 도시한 샘플을 Hair-line 표면처리 염수분무 한계시험 방식으로 24시간 간격으로 500시간 동안 시험한 결과, 마그네슘합금 제품의 표면에 형성된 전착층의 표면 광택의 양호한 상태가 유지됨을 알 수 있었다.In particular, the samples shown in FIG. 2 and FIG. 3 were tested for 500 hours at a time interval of 24 hours by the hair-line surface treatment salt spray limit test method, and the surface gloss of the electrodeposited layer formed on the surface of the magnesium alloy product was maintained And it was found.
1 : 마그네슘합금 제품
2 : 산화 박막층
3 : 전착층1: Magnesium alloy product
2: oxide thin film layer
3: Electrodeposited layer
Claims (4)
세척된 마그네슘합금의 제품의 표면에 물과 에탄올(C2H5OH), 아세톤(CH3COCH3)을 혼합한 표면처리용액을 분사하는 표면처리용액분사단계; 상기 표면처리용액분사단계에서 처리된 마그네슘합금 제품을 200 ~ 260℃의 내부공간을 구비한 직화기에 넣어서 10 ~ 15초동안 직화 처리하여 마그네슘합금 제품의 표면에 산화 박막층을 형성하는 직화처리단계; 상기 직화처리단계에서 처리된 마그네슘합금 제품을 에탄올로 세척한 뒤 이를 건조하는 세척건조단계; 그리고 상기 세척건조단계에서 처리된 마그네슘합금 제품의 표면에 형성된 산화 박막층 위에 전기 착색 방식으로 전착층을 형성하는 전기착색단계를 포함하여 이루어지며,
상기 표면처리용액분사단계의 표면처리용액은 물과 에탄올(C2H5OH), 아세톤(CH3COCH3)을 혼합하되, 상기 에탄올을 물 부피의 1 ~ 50배를 혼합함과 아울러 상기 아세톤을 에탄올 부피의 0.05 ~ 1배를 혼합한 것임을 특징으로 하는 표면 광택을 가진 마그네슘합금 제품의 표면처리방법.There is provided a magnesium alloy product having surface gloss which is obtained by removing the surface of the magnesium alloy product and removing and neutralizing the material for removing the surface of the magnesium alloy product, In the surface treatment method,
A surface treatment solution spraying step of spraying a surface treatment solution prepared by mixing water, ethanol (C 2 H 5 OH), and acetone (CH 3 COCH 3 ) on the surface of the product of the washed magnesium alloy; A direct-fire treatment step of putting the magnesium alloy product treated in the surface-treating solution injection step into a fire extinguisher having an internal space of 200 to 260 ° C and performing a direct fire treatment for 10 to 15 seconds to form an oxide thin film layer on the surface of the magnesium alloy product; A washing and drying step of washing the magnesium alloy product treated in the flue gas treating step with ethanol and drying the magnesium alloy product; And an electrodepositing step of forming an electrodeposited layer on an oxidized thin film layer formed on the surface of the magnesium alloy product treated in the washing and drying step,
The surface treatment solution in the surface treatment solution injecting step is prepared by mixing water, ethanol (C 2 H 5 OH), and acetone (CH 3 COCH 3 ), mixing the ethanol with water in an amount of 1 to 50 times, Is mixed with 0.05 to 1 times the volume of ethanol. The surface treatment method of a magnesium alloy product having a surface gloss.
세척된 마그네슘합금의 제품의 표면에 물과 에탄올(C2H5OH), 아세톤(CH3COCH3)을 혼합한 표면처리용액을 분사하는 표면처리용액분사단계; 상기 표면처리용액분사단계에서 처리된 마그네슘합금 제품을 150 ~ 200℃의 내부공간을 구비한 열처리기에 넣어서 5 ~ 20분 동안 열처리하는 열처리단계; 상기 열처리단계에서 처리된 마그네슘합금 제품을 에탄올로 세척한 뒤 이를 건조하는 세척건조단계; 그리고 상기 세척건조단계에서 처리된 마그네슘합금 제품의 표면에 형성된 산화 박막층 위에 전기 착색 방식으로 전착층을 형성하는 전기착색단계를 포함하여 이루어지며,
상기 표면처리용액분사단계의 표면처리용액은 물과 에탄올(C2H5OH), 아세톤(CH3COCH3)을 혼합하되, 상기 에탄올을 물 부피의 1 ~ 50배를 혼합함과 아울러 상기 아세톤을 에탄올 부피의 0.05 ~ 1배를 혼합한 것임을 특징으로 하는 표면 광택을 가진 마그네슘합금 제품의 표면처리방법.There is provided a magnesium alloy product having surface gloss which is obtained by removing the surface of the magnesium alloy product and removing and neutralizing the material for removing the surface of the magnesium alloy product, In the surface treatment method,
A surface treatment solution spraying step of spraying a surface treatment solution prepared by mixing water, ethanol (C 2 H 5 OH), and acetone (CH 3 COCH 3 ) on the surface of the product of the washed magnesium alloy; A heat treatment step of putting the magnesium alloy product treated in the surface treatment solution injection step into a heat treatment furnace having an internal space of 150 to 200 캜 for 5 to 20 minutes; A washing and drying step of washing the magnesium alloy product processed in the heat treatment step with ethanol and drying the magnesium alloy product; And an electrodepositing step of forming an electrodeposited layer on an oxidized thin film layer formed on the surface of the magnesium alloy product treated in the washing and drying step,
The surface treatment solution in the surface treatment solution injecting step is prepared by mixing water, ethanol (C 2 H 5 OH), and acetone (CH 3 COCH 3 ), mixing the ethanol with water in an amount of 1 to 50 times, Is mixed with 0.05 to 1 times the volume of ethanol. The surface treatment method of a magnesium alloy product having a surface gloss.
상기 전기착색단계의 전착층의 두께는 10 ~ 24㎛ 임을 특징으로 하는 표면 광택을 가진 마그네슘합금 제품의 표면처리방법.4. The method according to any one of claims 1 to 3,
Wherein the thickness of the electrodeposited layer of the electrochromic step is 10 to 24 占 퐉.
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