WO2023048342A1 - Method for manufacturing ceramic coating layer for aluminum material, and aluminum material cookware manufactured using same - Google Patents

Method for manufacturing ceramic coating layer for aluminum material, and aluminum material cookware manufactured using same Download PDF

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WO2023048342A1
WO2023048342A1 PCT/KR2021/018861 KR2021018861W WO2023048342A1 WO 2023048342 A1 WO2023048342 A1 WO 2023048342A1 KR 2021018861 W KR2021018861 W KR 2021018861W WO 2023048342 A1 WO2023048342 A1 WO 2023048342A1
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coating layer
aluminum
ceramic coating
aluminum material
manufacturing
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PCT/KR2021/018861
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French (fr)
Korean (ko)
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문정일
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문정일
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/14—Producing integrally coloured layers
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D9/00—Electrolytic coating other than with metals
    • C25D9/04—Electrolytic coating other than with metals with inorganic materials
    • C25D9/06—Electrolytic coating other than with metals with inorganic materials by anodic processes

Definitions

  • the present invention relates to a method for manufacturing a ceramic coating layer for an aluminum material, and more particularly, to a method for manufacturing a ceramic coating layer capable of implementing various colors, harmless to the human body, and exhibiting high corrosion resistance, and a manufacturing method including the same It relates to aluminum cooking utensils.
  • Cooking utensils used in cooking food in the kitchen must have heat resistance so as to withstand heat, and non-stick properties are required to prevent food from sticking to the inner surface of the cooking vessel during the cooking process.
  • wear resistance of the cooking vessel must be secured so that food is not contaminated by the substances harmful to the human body.
  • These cooking utensils are manufactured by being molded from materials such as aluminum plate material, aluminum alloy, stainless steel, copper, porcelain enamel, and porcelain.
  • aluminum is widely used as a material for cooking utensils because it is lightweight, has excellent thermal conductivity, is easy to mold, and has a low manufacturing cost.
  • the metal surface of the product is coated with a fine ceramic coating film using inorganic paint and inorganic ceramic coating composition having physical properties such as excellent heat resistance, stain resistance, chemical resistance, durability, etc. Techniques for preventing metal corrosion of instruments have been used.
  • a method for manufacturing a ceramic coating layer capable of implementing various colors, harmless to the human body, and securing excellent physical properties such as corrosion resistance has been developed.
  • the technical problem to be achieved by the present invention is to manufacture a ceramic coating layer of aluminum material, which is harmless to the human body and capable of exhibiting high corrosion resistance, while being able to realize various natural colors by the reaction of aluminum or aluminum alloy components and components of the electrolyte solution. It is to provide a method and cooking utensils made of aluminum material manufactured by including the same.
  • a method for manufacturing a ceramic coating layer of an aluminum material includes preparing an aluminum alloy layer; Preparing an electrolyte solution containing a transition metal oxide salt; and forming an aluminum oxide coating layer on the surface of the aluminum alloy layer by applying a voltage under the electrolyte solution.
  • the electrolyte solution ranges from PH 1 to PH 14, and includes potassium, phosphate, sodium, ammonium ion, oxalic acid or citric acid, sodium hydroxide ( NaOH), potassium hydroxide (KOH), sodium silicate (Na 2 SiO 3 ), NaAl 2 , NaF, Na 2 CO 3 and It is characterized in that it further comprises at least one solute selected from the group consisting of NaF-Na 2 CO 3 .
  • the solvent of the electrolyte solution is ultrapure water
  • the transition metal oxide salt is chromium (Cr), cobalt (Co), manganese (Mn), molybdenum (Mo), nickel (Ni), vanadium (V), scandymium ( Sc), titanium (Ti), iron (Fe), copper (Cu), yttrium (Y), zirconium (Zr), ruthenium (Ru), palladium (Pd), silver (Ag), cadmium (Cd), lutetium ( A transition metal oxide containing one or two or more selected from the group of transition metals, which are Lu), tantalum (Ta), tungsten (W), rhenium (Re), lanthanum (La), neodymium (Nd), and gadolinium (Gd) Characterized in that it is a salt.
  • the aluminum oxide coating layer is characterized in that it has a pastel color of white or pink, yellow, green and blue series.
  • the aluminum oxide coating layer is composed of one or two or more selected from the group of transition metals and, in the solute, potassium, phosphate, sodium, ammonium ion, oxalic acid Or by the reaction of citric acid, it is characterized by implementing a white color.
  • an appropriate voltage is in the range of 50 V to 300 V, and an appropriate applied current density is 5 to 20 A/dm2.
  • a cooking utensil according to an embodiment of the present invention may include a ceramic coating layer made of aluminum material manufactured by a method for manufacturing a ceramic coating layer made of aluminum material.
  • an aluminum oxide layer by the reaction of aluminum or aluminum alloy components and components of the electrolyte solution, it is possible to implement various natural colors including bright colors such as white or pastel. Accordingly, it can contribute to satisfying the demand for white color in the kitchen appliance market.
  • organic and inorganic pigments or sulfuric acid solution used in the existing anodizing method are not used at all, so it is harmless to the human body and eco-friendly, and has a dense structure with pores of several to several tens of nm in size, so it has excellent corrosion resistance.
  • FIG. 1 schematically shows the structure of a ceramic coating layer formed according to an embodiment of the present invention.
  • 'cooking utensils' may mean all utensils used in the process of cooking food.
  • 'cooking utensils' in the present invention may narrowly mean container-type utensils for cooking by holding food, such as pots, pans, woks, grilling plates, pressure cookers, steamers, etc., but is not limited thereto .
  • kitchen knives, chopping boards, pots, cutlery, plates, scissors, can openers, shaving knives, measuring tools, spatula, sieve, and even small tools such as whisks can be comprehensively interpreted.
  • a method for manufacturing a ceramic coating layer of an aluminum material includes preparing an aluminum alloy layer; Preparing an electrolyte solution containing a transition metal oxide salt; and forming an aluminum oxide coating layer on the surface of the aluminum alloy layer by applying a voltage under the electrolyte solution.
  • FIG. 1 schematically shows the structure of a ceramic coating layer formed according to an embodiment of the present invention.
  • the ceramic coating layer of the present invention may include an aluminum alloy layer 100 and an aluminum oxide coating layer 200 positioned on the aluminum alloy layer 100 .
  • the aluminum alloy layer 100 may refer to aluminum (AL) or an aluminum alloy using aluminum as a main material.
  • the aluminum alloy layer may be, for example, plate-shaped, but the shape is not particularly limited.
  • the electrolyte solution may implement various colors of the aluminum oxide coating layer 200 to be formed later according to the type of the transition metal oxide salt.
  • the electrolyte solution may further include various metal ions, metal oxide salts, and/or other additives as solutes in addition to the transition metal oxide salt.
  • the electrolyte solution may be selected from a PH range, that is, an acidic, neutral or alkaline PH range, for example, a PH range of 1 to 14, specifically a range of PH 1 to 10.
  • a PH range that is, an acidic, neutral or alkaline PH range, for example, a PH range of 1 to 14, specifically a range of PH 1 to 10.
  • the solvent of the electrolyte solution for example, ultrapure water may be used.
  • the transition metal oxide salt is chromium (Cr), cobalt (Co), manganese (Mn), molybdenum (Mo), nickel (Ni), vanadium (V), scandymium (Sc), titanium (Ti), iron ( Fe), copper (Cu), yttrium (Y), zirconium (Zr), ruthenium (Ru), palladium (Pd), silver (Ag), cadmium (Cd), lutetium (Lu), tantalum (Ta), tungsten ( W), rhenium (Re), lanthanum (La), neodymium (Nd), and gadolinium (Gd) may be a transition metal oxide salt containing one or two or more selected from the group of transition metals.
  • the solute is potassium, phosphate, sodium, ammonium ion, oxalic acid or citric acid, sodium hydroxide (NaOH), potassium hydroxide (KOH), silicic acid Sodium (Na 2 SiO 3 ), NaAl 2 , NaF, Na 2 CO 3 and It may be one or more selected from the group consisting of NaF-Na 2 CO 3 .
  • the transition metal oxide salt may be dissociated into metal oxide anions and cations in the electrolyte solution.
  • the metal oxide anion may form the aluminum oxide coating layer 200 by oxidizing the surface of the aluminum alloy layer 100 to form a thin oxide film (alumina, aluminum oxide).
  • the aluminum oxide coating layer 200 is formed by being ceramicized on the surface of the aluminum alloy layer 100 , chemical stability is excellent and strong adhesion with the aluminum alloy layer 100 can be secured. Accordingly, the ceramic coating layer including the aluminum oxide coating layer 200 formed on the aluminum alloy layer 100 can exhibit excellent corrosion resistance in cookware.
  • the oxide film that is, alumina reacts with the metal oxide anion and/or impurities in the electrolyte to form a new energy level in the band gap of alumina, so that the aluminum oxide coating layer 200 can exhibit various colors. That is, pure alumina is a colorless, odorless, and transparent crystal, but depending on the components of added ions or impurities, various colors can be expressed during the formation of the aluminum oxide coating layer 200 . Accordingly, it is possible to omit a separate step of applying and coloring a pigment after forming an oxide film in the prior art.
  • the method for manufacturing a ceramic coating layer according to an embodiment of the present invention is environmentally friendly because it does not require the use of dust or organic solvents, and can contribute to productivity improvement due to simplification of the process.
  • the aluminum oxide coating layer 200 may be capable of implementing a wider range of colors than before, including not only black-based colors but also white or, for example, pink, yellow, green, and blue-based pastel colors.
  • the aluminum oxide coating layer 200 includes the transition metal in the electrolyte solution and among the solutes, potassium, phosphate, sodium, ammonium ion, oxalic acid acid) or citric acid, it is possible to implement a white color.
  • the aluminum oxide coating layer 200 may exhibit a blue color when chromium, titanium, or vanadium in the electrolyte solution reacts with the alumina.
  • the aluminum oxide coating layer 200 may be implemented in a red color.
  • Other pastel colors can be implemented in various ways according to the components and concentrations of the alumina and the electrolyte solution.
  • impurities that can react with the alumina are removed as much as possible, and the color is transparent like diamond by manufacturing in the form of artificial white colorless and transparent sapphire (Al2O3, alumina).
  • the thickness of the aluminum oxide coating layer 200 can be easily adjusted within a range of tens of nm to tens of ⁇ m, specifically, from 10 nm to 99 ⁇ m, and the coating layer can grow uniformly, so that the initial surface structure can be continuously can be implemented Thus, durability and uniformity of the ceramic coating layer can be secured.
  • the aluminum oxide coating layer 200 may have a porous structure having a plurality of pores.
  • a porous structure having a plurality of pores.
  • the pores may have a size in the range of several to hundreds of nm, specifically, several to several tens of nm, for example, 100 nm or less, and another example, 50 nm or less.
  • the voltage may be applied between the aluminum alloy layer and the counter electrode to form the aluminum oxide coating layer, and specifically, the voltage may be in the range of 50 V to 300 V. If the voltage is less than 50V, since dielectric breakdown of the oxide film does not occur, plasma due to discharge may not be formed, and if the voltage exceeds 300 V, the formation rate of the oxide film is fast, making it difficult to control the process.
  • a suitable applied current density may be in the range of 5 to 20 A/dm2.
  • the applied current density is less than 5 A/dm 2 , it takes too long to form the coating layer, resulting in poor productivity, and when it is greater than 20 A/dm 2 , economical efficiency is poor due to excessive power consumption.
  • the method for manufacturing a ceramic coating layer according to an embodiment of the present invention is eco-friendly because it can eliminate harmful effects to the human body due to residual sulfate ions because it does not use a sulfuric acid solution as an electrolyte like in conventional anodizing.
  • the color can be implemented with only one process of forming the aluminum oxide layer without performing a process of adding organic/inorganic pigments to the aluminum oxide layer and coloring the aluminum oxide layer.
  • color implementation is limited to black in the existing anodizing technology, according to the present invention, it is possible to implement a wider range of colors than before, including white or pink, yellow, green and blue pastel colors. can
  • the ceramic coating layer that is, the ceramic coating layer including the aluminum alloy layer and the aluminum oxide coating layer formed on the aluminum alloy layer is 100% ceramic, harmless to the human body, and forms a hard and dense porous structure inside, It does not permeate, prevents elution of aluminum from occurring, and can provide excellent acid resistance, heat resistance and corrosion resistance.
  • the present invention relates to a method for manufacturing a ceramic coating layer for an aluminum material, and more particularly, to a method for manufacturing a ceramic coating layer capable of implementing various colors, harmless to the human body, and exhibiting high corrosion resistance, and a manufacturing method including the same It relates to aluminum cooking utensils and has industrial applicability.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
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Abstract

The present invention relates to a method for manufacturing a ceramic coating layer for an aluminum material and, more specifically, to: a method for manufacturing a ceramic coating layer, which enable various colors to be implemented, is harmless to the human body and can exhibit high corrosion resistance; and aluminum material cookware manufactured using same.

Description

알루미늄 소재의 세라믹 코팅층 제조방법 및 이를 포함하여 제조된 알루미늄 소재의 조리기구Method for manufacturing a ceramic coating layer made of aluminum and cooking utensils made of aluminum made using the same
본 발명은 알루미늄 소재에 대한 세라믹 코팅층 제조방법에 관한 것으로, 더욱 상세하게는 다양한 컬러 구현이 가능하면서도, 인체에 무해하고, 고내식성을 발휘할 수 있도록 하는, 세라믹 코팅층의 제조방법과 이를 포함하여 제조된 알루미늄 소재의 조리기구에 관한 것이다.The present invention relates to a method for manufacturing a ceramic coating layer for an aluminum material, and more particularly, to a method for manufacturing a ceramic coating layer capable of implementing various colors, harmless to the human body, and exhibiting high corrosion resistance, and a manufacturing method including the same It relates to aluminum cooking utensils.
주방에서 음식 조리 시 사용되는 조리 기구는 열에 견딜 수 있도록 내열성이 확보되어야 하고, 조리과정에서 조리 용기의 내면에 음식물이 달라붙지 않도록 논스틱성이 요구된다. 또한, 조리 시 조리 용기의 내면이 조리 기구에 의해 긁혀 조리 용기로부터 인체 유해 물질이 배출될 경우, 음식물이 상기 인체 유해 물질에 의해 오염되지 않도록 조리 용기의 내마모성이 확보되어야 한다.Cooking utensils used in cooking food in the kitchen must have heat resistance so as to withstand heat, and non-stick properties are required to prevent food from sticking to the inner surface of the cooking vessel during the cooking process. In addition, when the inner surface of the cooking vessel is scratched by a cooking utensil during cooking and substances harmful to the human body are discharged from the cooking vessel, wear resistance of the cooking vessel must be secured so that food is not contaminated by the substances harmful to the human body.
이러한 조리 기구는, 알루미늄 판재, 알루미늄 합금, 스테인리스 스틸, 구리, 법랑, 사기 등의 재질로 성형되어 제조된다. 그 중에서도, 알루미늄은 가벼우면서도 열전도율이 우수하고, 성형이 용이하며 제작 비용이 저렴하여 조리 기구의 소재로서 널리 이용되고 있다.These cooking utensils are manufactured by being molded from materials such as aluminum plate material, aluminum alloy, stainless steel, copper, porcelain enamel, and porcelain. Among them, aluminum is widely used as a material for cooking utensils because it is lightweight, has excellent thermal conductivity, is easy to mold, and has a low manufacturing cost.
이러한 조리 기구들은, 200도 이상의 급열과 급랭의 반복에 의한 금속의 팽창 및 수축의 반복, 소비자의 과실로 인한 코팅면의 손상 및 산화, 벗겨짐, 부식 등 많은 문제점을 나타내고 있다. 특히, 전술한 이유로 코팅이 벗겨져 알루미늄 등 금속 성분이 노출되며, 코팅이 벗겨진 부위에는 음식물이 눌러 붙어 조리물의 산 성분으로 인해 기재가 부식되고, 눌러 붙은 음식물을 섭취하는 경우에는 금속 성분이 인체에 축적되어 알츠하이머 병 등의 부작용을 유발할 수 있는 위험성이 존재한다. These cooking utensils exhibit many problems, such as repetition of expansion and contraction of metal due to repeated rapid heating and rapid cooling of 200 degrees or more, damage to the coating surface due to consumer negligence, oxidation, peeling, and corrosion. In particular, for the reasons described above, metal components such as aluminum are exposed due to peeling of the coating, food is stuck to the area where the coating is peeled off, and the base material is corroded due to the acid component of the food. There is a risk of causing side effects such as Alzheimer's disease.
이를 위하여, 쿡웨어(cook-ware) 분야에서는 제품의 금속 표면에 우수한 내열성, 내오염성, 내약품성, 내구성 등의 물성을 갖는 무기질 도료 및 무기계 세라믹 코팅 조성물을 이용하여 파인 세라믹으로 도막을 입혀 가정용 주방 기구의 금속 부식을 방지하는 기술이 사용되어 오고 있다.To this end, in the field of cook-ware, the metal surface of the product is coated with a fine ceramic coating film using inorganic paint and inorganic ceramic coating composition having physical properties such as excellent heat resistance, stain resistance, chemical resistance, durability, etc. Techniques for preventing metal corrosion of instruments have been used.
한편, 조리기구에 색상을 입히기 위한 기술로서 종래에는, 알루미늄 표면에 유, 무기 도료를 올려 도장하는 방식, 안료를 포함하는 유기물 또는 세라믹 파우더를 스프레이(spray) 하여 도장층을 형성하거나, 니켈도금 등의 전기화학적 방식을 사용하여 도금하는 방법 등을 사용하여 왔다. On the other hand, as a technology for coloring cookware, conventionally, a method of coating an aluminum surface with an oil or inorganic paint, spraying an organic material or ceramic powder containing a pigment to form a paint layer, nickel plating, etc. A method of plating using an electrochemical method of has been used.
그러나, 유, 무기 도료나 세라믹 파우더에는 대부분 중금속 성분이 포함되어 사용이 제한적이고, 도장층을 형성하더라도 알루미늄 층과의 내구성이 약하여 쉽게 벗겨져서 알루미늄이 용출될 수 있는 위험성이 있고, 도장층과 알루미늄층 간의 밀착력을 확보하기 위해 접착층을 추가로 형성하여야 하는 등의 문제점이 있다. However, most of the oil and inorganic paints and ceramic powders contain heavy metal components, so their use is limited. Even if the paint layer is formed, the durability with the aluminum layer is weak, so there is a risk that aluminum can be easily peeled off, and the paint layer and the aluminum layer There is a problem such as the need to additionally form an adhesive layer in order to secure the adhesion between the two.
이에 더하여, 최근에는 특히, 까다로운 젊은층들의 조리기구에 대한 수요가 흑색과 같은 기존의 획일화된 색상을 벗어나, 화이트나 파스텔톤과 같은 밝은 색상을 선호하는 추세로 변화하고 있다.In addition, in recent years, the demand for cooking utensils, especially of the picky young people, is changing to a trend of preferring bright colors such as white or pastel tones, out of existing standardized colors such as black.
이에 본 발명에서는, 다양한 컬러 구현이 가능하면서도, 인체에 무해하고, 내식성 등과 같은 우수한 물성을 확보할 수 있기 위한 세라믹 코팅층의 제조방법을 개발하기에 이르렀다.Accordingly, in the present invention, a method for manufacturing a ceramic coating layer capable of implementing various colors, harmless to the human body, and securing excellent physical properties such as corrosion resistance has been developed.
본 발명이 이루고자 하는 기술적 과제는, 알루미늄 또는 알루미늄 합금 성분과 전해액의 성분의 반응에 의한 자연 발색 컬러를 다양하게 구현할 수 있으면서, 인체에 무해하고, 고내식성을 발휘할 수 있는, 알루미늄 소재의 세라믹 코팅층 제조방법 및 이를 포함하여 제조되는 알루미늄 소재의 조리기구를 제공함에 있다. The technical problem to be achieved by the present invention is to manufacture a ceramic coating layer of aluminum material, which is harmless to the human body and capable of exhibiting high corrosion resistance, while being able to realize various natural colors by the reaction of aluminum or aluminum alloy components and components of the electrolyte solution. It is to provide a method and cooking utensils made of aluminum material manufactured by including the same.
본 발명이 이루고자 하는 기술적 과제는 이상에서 언급한 기술적 과제로 제한되지 않으며, 언급되지 않은 또 다른 기술적 과제들은 아래의 기재로부터 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에게 명확하게 이해될 수 있을 것이다.The technical problem to be achieved by the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. There will be.
상기 기술적 과제를 달성하기 위하여, 본 발명의 일 실시예에 따른 알루미늄 소재의 세라믹 코팅층 제조방법은, 알루미늄 합금층을 준비하는 단계; 전이금속 산화물 염을 포함하는 전해질 용액을 준비하는 단계; 및 상기 전해질 용액 하에 전압을 인가시켜 상기 알루미늄 합금층의 표면 상에 산화알루미늄 코팅층을 형성하는 단계; 를 포함할 수 있다.In order to achieve the above technical problem, a method for manufacturing a ceramic coating layer of an aluminum material according to an embodiment of the present invention includes preparing an aluminum alloy layer; Preparing an electrolyte solution containing a transition metal oxide salt; and forming an aluminum oxide coating layer on the surface of the aluminum alloy layer by applying a voltage under the electrolyte solution. can include
상기 전해질 용액은, PH 1 내지 PH 14 범위를 나타내고, 칼륨(potassium), 인산염(phosphate), 나트륨(sodium), 암모늄 이온(ammonium), 옥살산(oxalic acid) 또는 시트르산(citric acid), 수산화나트륨(NaOH), 수산화칼륨(KOH), 규산나트륨(Na2SiO3), NaAl2, NaF, Na2CO3 및 NaF-Na2CO3 으로 이루어진 군에서 선택되는 1종 이상인 용질을 더 포함하는 것을 특징으로 한다. The electrolyte solution ranges from PH 1 to PH 14, and includes potassium, phosphate, sodium, ammonium ion, oxalic acid or citric acid, sodium hydroxide ( NaOH), potassium hydroxide (KOH), sodium silicate (Na 2 SiO 3 ), NaAl 2 , NaF, Na 2 CO 3 and It is characterized in that it further comprises at least one solute selected from the group consisting of NaF-Na 2 CO 3 .
상기 전해질 용액의 용매는, 초순수이고, 상기 전이금속 산화물 염은, 크롬(Cr), 코발트(Co), 망간(Mn), 몰리브덴 (Mo), 니켈(Ni), 바나듐(V), 스칸디뮴(Sc), 타이타늄(Ti), 철(Fe), 구리(Cu), 이트륨(Y), 지르코늄(Zr), 루테늄(Ru), 팔라듐(Pd), 은(Ag), 카드뮴(Cd), 루테튬(Lu), 탄탈륨(Ta), 텅스텐(W), 레늄(Re), 란타늄(La), 네오디뮴(Nd) 및 가돌리늄(Gd)인 전이금속의 군에서 선택되는 하나 또는 둘 이상을 포함하는 전이금속 산화물 염인 것을 특징으로 한다. The solvent of the electrolyte solution is ultrapure water, and the transition metal oxide salt is chromium (Cr), cobalt (Co), manganese (Mn), molybdenum (Mo), nickel (Ni), vanadium (V), scandymium ( Sc), titanium (Ti), iron (Fe), copper (Cu), yttrium (Y), zirconium (Zr), ruthenium (Ru), palladium (Pd), silver (Ag), cadmium (Cd), lutetium ( A transition metal oxide containing one or two or more selected from the group of transition metals, which are Lu), tantalum (Ta), tungsten (W), rhenium (Re), lanthanum (La), neodymium (Nd), and gadolinium (Gd) Characterized in that it is a salt.
상기 산화알루미늄 코팅층은, 화이트 또는, 핑크, 옐로우, 그린 및 블루 계열의 파스텔 색상을 갖는 것을 특징으로 한다. 상기 산화알루미늄 코팅층은, 상기 전이금속의 군에서 선택되는 하나 또는 둘 이상과, 상기 용질에서, 칼륨(potassium), 인산염(phosphate), 나트륨(sodium), 암모늄 이온(ammonium), 옥살산(oxalic acid) 또는 시트르산(citric acid)의 반응에 의하여, 화이트 컬러를 구현하는 것을 특징으로 한다. 상기 전압을 인가시킬 때, 적정 전압은 50 V 내지 300 V 범위이고, 적정 인가 전류 밀도는, 5 내지 20 A/dm2 인 것을 특징으로 한다. The aluminum oxide coating layer is characterized in that it has a pastel color of white or pink, yellow, green and blue series. The aluminum oxide coating layer is composed of one or two or more selected from the group of transition metals and, in the solute, potassium, phosphate, sodium, ammonium ion, oxalic acid Or by the reaction of citric acid, it is characterized by implementing a white color. When the voltage is applied, an appropriate voltage is in the range of 50 V to 300 V, and an appropriate applied current density is 5 to 20 A/dm2.
상기 기술적 과제를 달성하기 위하여, 본 발명의 일 실시예에 따른 조리 기구는, 알루미늄 소재의 세라믹 코팅층 제조방법에 의하여 제조된 알루미늄 소재의 세라믹 코팅층을 포함할 수 있다.In order to achieve the above technical problem, a cooking utensil according to an embodiment of the present invention may include a ceramic coating layer made of aluminum material manufactured by a method for manufacturing a ceramic coating layer made of aluminum material.
본 발명의 실시예에 따르면, 알루미늄 또는 알루미늄 합금 성분과 전해액의 성분의 반응에 의한 알루미늄 산화층을 형성함으로써, 화이트 또는 파스텔 계열과 같은 밝은색을 포함하는 자연 발색 컬러를 다양하게 구현할 수 있다. 이에 주방 용품 시장에 있어서 화이트 칼라에 대한 수요를 충족시키는데 기여할 수 있다. According to an embodiment of the present invention, by forming an aluminum oxide layer by the reaction of aluminum or aluminum alloy components and components of the electrolyte solution, it is possible to implement various natural colors including bright colors such as white or pastel. Accordingly, it can contribute to satisfying the demand for white color in the kitchen appliance market.
또한, 유,무기 안료나 기존의 아노다이징(anodizing) 방식에서 사용되는 황산 용액을 전혀 사용하지 않아 인체에 무해하고 친환경적이면서도, 수~수십nm 크기의 기공을 갖는 치밀한 구조를 가짐으로써, 우수한 고내식성을 동시에 발휘할 수 있는, 알루미늄 소재의 조리기구를 제공할 수 있다. In addition, organic and inorganic pigments or sulfuric acid solution used in the existing anodizing method are not used at all, so it is harmless to the human body and eco-friendly, and has a dense structure with pores of several to several tens of nm in size, so it has excellent corrosion resistance. At the same time, it is possible to provide cooking utensils made of aluminum.
본 발명의 효과는 상기한 효과로 한정되는 것은 아니며, 본 발명의 설명 또는 청구범위에 기재된 발명의 구성으로부터 추론 가능한 모든 효과를 포함하는 것으로 이해되어야 한다.The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the description of the present invention or the configuration of the invention described in the claims.
도 1은 본 발명의 일 실시예에 따라 형성되는 세라믹 코팅층의 구조를 모식적으로 나타낸 것이다.1 schematically shows the structure of a ceramic coating layer formed according to an embodiment of the present invention.
이하에서는 첨부한 도면을 참조하여 본 발명을 설명하기로 한다. 그러나 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며, 따라서 여기에서 설명하는 실시예로 한정되는 것은 아니다. 그리고 도면에서 본 발명을 명확하게 설명하기 위해서 설명과 관계없는 부분은 생략하였으며, 명세서 전체를 통하여 유사한 부분에 대해서는 유사한 도면 부호를 붙였다.Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and, therefore, is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.
명세서 전체에서, 어떤 부분이 다른 부분과 "연결(접속, 접촉, 결합)"되어 있다고 할 때, 이는 "직접적으로 연결"되어 있는 경우뿐 아니라, 그 중간에 다른 부재를 사이에 두고 "간접적으로 연결"되어 있는 경우도 포함한다. 또한 어떤 부분이 어떤 구성요소를 "포함"한다고 할 때, 이는 특별히 반대되는 기재가 없는 한 다른 구성요소를 제외하는 것이 아니라 다른 구성요소를 더 구비할 수 있다는 것을 의미한다.Throughout the specification, when a part is said to be "connected (connected, contacted, combined)" with another part, this is not only "directly connected", but also "indirectly connected" with another member in between. "Including cases where In addition, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated.
본 명세서에서 사용한 용어는 단지 특정한 실시예를 설명하기 위해 사용된 것으로, 본 발명을 한정하려는 의도가 아니다. 단수의 표현은 문맥상 명백하게 다르게 뜻하지 않는 한, 복수의 표현을 포함한다. 본 명세서에서, "포함하다" 또는 "가지다" 등의 용어는 명세서상에 기재된 특징, 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것이 존재함을 지정하려는 것이지, 하나 또는 그 이상의 다른 특징들이나 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것들의 존재 또는 부가 가능성을 미리 배제하지 않는 것으로 이해되어야 한다.Terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.
본 발명, 본 명세서에서, '조리기구' 란 음식을 조리하는 과정에서 사용하는 모든 용구를 의미할 수 있다. 구체적으로, 본 발명에서의 '조리기구'는, 좁게는 냄비류, 팬류, 웍류, 구이판, 압력솥, 찜기류 등인 음식을 담아 조리를 수행하는 용기형의 기구류를 의미할 수 있으나, 이에 제한되는 것은 아니다. 예를 들어, 식칼, 도마, 냄비, 커틀러리, 접시, 가위, 캔따개, 채칼, 계량도구, 스패튤러, 체 및 거품기 등의 소형의 도구류까지 포괄적으로 해석될 수 있다. In the present invention and this specification, 'cooking utensils' may mean all utensils used in the process of cooking food. Specifically, 'cooking utensils' in the present invention may narrowly mean container-type utensils for cooking by holding food, such as pots, pans, woks, grilling plates, pressure cookers, steamers, etc., but is not limited thereto . For example, kitchen knives, chopping boards, pots, cutlery, plates, scissors, can openers, shaving knives, measuring tools, spatula, sieve, and even small tools such as whisks can be comprehensively interpreted.
이하 첨부된 도면을 참고하여 본 발명의 실시예를 상세히 설명하기로 한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명의 일 실시예에 따른 알루미늄 소재의 세라믹 코팅층 제조방법은, 알루미늄 합금층을 준비하는 단계; 전이금속 산화물 염을 포함하는 전해질 용액을 준비하는 단계; 및 상기 전해질 용액 하에 전압을 인가시켜 상기 알루미늄 합금층의 표면 상에 산화알루미늄 코팅층을 형성하는 단계; 를 포함한다. A method for manufacturing a ceramic coating layer of an aluminum material according to an embodiment of the present invention includes preparing an aluminum alloy layer; Preparing an electrolyte solution containing a transition metal oxide salt; and forming an aluminum oxide coating layer on the surface of the aluminum alloy layer by applying a voltage under the electrolyte solution. includes
도 1은 본 발명의 일 실시예에 따라 형성되는 세라믹 코팅층의 구조를 모식적으로 나타낸 것이다.1 schematically shows the structure of a ceramic coating layer formed according to an embodiment of the present invention.
도 1을 참조하면, 본 발명의 세라믹 코팅층은, 알루미늄 합금층(100) 및 상기 알루미늄 합금층(100) 상에 위치하는 산화알루미늄 코팅층(200))을 포함하는 것일 수 있다. Referring to FIG. 1 , the ceramic coating layer of the present invention may include an aluminum alloy layer 100 and an aluminum oxide coating layer 200 positioned on the aluminum alloy layer 100 .
상기 알루미늄 합금층(100)은, 알루미늄(AL) 또는 알루미늄을 주 소재로 하는 알루미늄 합금을 모두 의미할 수 있다. 상기 알루미늄 합금층은 일례로, 판상형일 수 있으나, 그 형상에 대하여는 특별히 한정되지 않는다. The aluminum alloy layer 100 may refer to aluminum (AL) or an aluminum alloy using aluminum as a main material. The aluminum alloy layer may be, for example, plate-shaped, but the shape is not particularly limited.
상기 전해질 용액은, 상기 전이금속 산화물 염의 종류에 따라 추후 형성되는 산화 알루미늄 코팅층(200)의 색상을 다양하게 구현할 수 있다. 경우에 따라서, 상기 전해질 용액은, 상기 전이금속 산화물 염 이외에 다양한 금속이온, 금속 산화물 염 및/또는 기타 첨가제를 용질로써 더 포함할 수 있다. 상기 전해질 용액은, PH 범위에 제한없이, 즉, 산성, 중성 또는 알칼리성의 PH 범위, 예컨대, PH 1 내지 14 범위, 구체적으로는 PH 1 내지 10의 범위 내에서 선택되어 나타낼 수 있다. 상기 전해질 용액의 용매는, 일례로, 초순수를 사용할 수 있다. The electrolyte solution may implement various colors of the aluminum oxide coating layer 200 to be formed later according to the type of the transition metal oxide salt. In some cases, the electrolyte solution may further include various metal ions, metal oxide salts, and/or other additives as solutes in addition to the transition metal oxide salt. The electrolyte solution may be selected from a PH range, that is, an acidic, neutral or alkaline PH range, for example, a PH range of 1 to 14, specifically a range of PH 1 to 10. As the solvent of the electrolyte solution, for example, ultrapure water may be used.
상기 전이금속 산화물 염은, 크롬(Cr), 코발트(Co), 망간(Mn), 몰리브덴 (Mo), 니켈(Ni), 바나듐(V), 스칸디뮴(Sc), 타이타늄(Ti), 철(Fe), 구리(Cu), 이트륨(Y), 지르코늄(Zr), 루테늄(Ru), 팔라듐(Pd), 은(Ag), 카드뮴(Cd), 루테튬(Lu), 탄탈륨(Ta), 텅스텐(W), 레늄(Re), 란타늄(La), 네오디뮴(Nd) 및 가돌리늄(Gd)인 전이금속의 군에서 선택되는 하나 또는 둘 이상을 포함하는 전이금속 산화물 염일 수 있다. The transition metal oxide salt is chromium (Cr), cobalt (Co), manganese (Mn), molybdenum (Mo), nickel (Ni), vanadium (V), scandymium (Sc), titanium (Ti), iron ( Fe), copper (Cu), yttrium (Y), zirconium (Zr), ruthenium (Ru), palladium (Pd), silver (Ag), cadmium (Cd), lutetium (Lu), tantalum (Ta), tungsten ( W), rhenium (Re), lanthanum (La), neodymium (Nd), and gadolinium (Gd) may be a transition metal oxide salt containing one or two or more selected from the group of transition metals.
상기 용질은, 칼륨(potassium), 인산염(phosphate), 나트륨(sodium), 암모늄 이온(ammonium), 옥살산(oxalic acid) 또는 시트르산(citric acid), 수산화나트륨(NaOH), 수산화칼륨(KOH), 규산나트륨(Na2SiO3), NaAl2, NaF, Na2CO3 및 NaF-Na2CO3 으로 이루어진 군에서 선택되는 1종 이상일 수 있다. The solute is potassium, phosphate, sodium, ammonium ion, oxalic acid or citric acid, sodium hydroxide (NaOH), potassium hydroxide (KOH), silicic acid Sodium (Na 2 SiO 3 ), NaAl 2 , NaF, Na 2 CO 3 and It may be one or more selected from the group consisting of NaF-Na 2 CO 3 .
상기 전이금속 산화물 염은 상기 전해질 용액 내에서 금속 산화물 음이온과 양이온으로 해리될 수 있다. 상기 금속 산화물 음이온은, 상기 알루미늄 합금층(100)의 표면을 산화시켜 얇은 산화 피막(알루미나, aluminum oxide)을 형성하여 산화알루미늄 코팅층(200)을 형성할 수 있다. The transition metal oxide salt may be dissociated into metal oxide anions and cations in the electrolyte solution. The metal oxide anion may form the aluminum oxide coating layer 200 by oxidizing the surface of the aluminum alloy layer 100 to form a thin oxide film (alumina, aluminum oxide).
상기 산화알루미늄 코팅층(200)은, 상기 알루미늄 합금층(100)의 표면 상에 세라믹화되어 형성되기 때문에 화학적 안정성이 우수하고, 상기 알루미늄 합금층(100)과의 강한 밀착력을 확보할 수 있다. 이에 따라, 상기 알루미늄 합금층(100) 상에 형성된 상기 산화알루미늄 코팅층(200)을 포함하는 상기 세라믹 코팅층은, 조리기구에 있어서 우수한 내식성을 발휘할 수 있다.Since the aluminum oxide coating layer 200 is formed by being ceramicized on the surface of the aluminum alloy layer 100 , chemical stability is excellent and strong adhesion with the aluminum alloy layer 100 can be secured. Accordingly, the ceramic coating layer including the aluminum oxide coating layer 200 formed on the aluminum alloy layer 100 can exhibit excellent corrosion resistance in cookware.
또한, 상기 산화 피막, 즉, 알루미나는 전해질 내의 상기 금속 산화물 음이온 및/또는 불순물과 반응하여 알루미나의 밴드갭에 새로운 에너지 준위를 형성시켜 상기 산화알루미늄 코팅층(200)이 다양한 색상을 나타낼 수 있도록 한다. 즉, 순수 알루미나는 무색무취의 투명한 결정이지만, 첨가되는 이온 또는 불순물의 성분에 따라서 상기 산화알루미늄 코팅층(200)의 형성 시 다양한 색상을 발현시킬 수 있다. 이로써, 종래에 산화 피막을 형성한 후에 안료를 도장하여 착색하는 별도의 공정을 생략할 수 있다. In addition, the oxide film, that is, alumina reacts with the metal oxide anion and/or impurities in the electrolyte to form a new energy level in the band gap of alumina, so that the aluminum oxide coating layer 200 can exhibit various colors. That is, pure alumina is a colorless, odorless, and transparent crystal, but depending on the components of added ions or impurities, various colors can be expressed during the formation of the aluminum oxide coating layer 200 . Accordingly, it is possible to omit a separate step of applying and coloring a pigment after forming an oxide film in the prior art.
다시 말해서, 상기 알루미늄 합금층(100) 상에 산화알루미늄 코팅층(200)을 형성하는 하나의 공정만으로도, 내식성, 내열성과 같은 물성과 자연 발색 칼라 구현이 모두 가능할 수 있다. 이에, 본 발명의 일 실시예에 따른 세라믹 코팅층 제조방법은, 분진이나 유기용매의 사용이 필요하지 않아 친환경적이면서도, 공정의 단순화로 인한 생산성 향상에 기여할 수 있다. In other words, only one process of forming the aluminum oxide coating layer 200 on the aluminum alloy layer 100 may realize both physical properties such as corrosion resistance and heat resistance and natural color development. Accordingly, the method for manufacturing a ceramic coating layer according to an embodiment of the present invention is environmentally friendly because it does not require the use of dust or organic solvents, and can contribute to productivity improvement due to simplification of the process.
상기 산화알루미늄 코팅층(200)은 흑색 계열의 색상 뿐만 아니라 예컨대, 화이트 또는, 핑크, 옐로우, 그린 및 블루 계열의 파스텔 색상까지, 기존에 비해 보다 다양한 범위의 색상 구현이 가능할 수 있다.The aluminum oxide coating layer 200 may be capable of implementing a wider range of colors than before, including not only black-based colors but also white or, for example, pink, yellow, green, and blue-based pastel colors.
일례로써, 상기 산화알루미늄 코팅층(200)은, 상기 전해질 용액 내의 전술된 전이금속과, 상기 용질 중에서, 칼륨(potassium), 인산염(phosphate), 나트륨(sodium), 암모늄 이온(ammonium), 옥살산(oxalic acid) 또는 시트르산(citric acid)의 반응에 의하여, 화이트 컬러를 구현할 수 있다. As an example, the aluminum oxide coating layer 200 includes the transition metal in the electrolyte solution and among the solutes, potassium, phosphate, sodium, ammonium ion, oxalic acid acid) or citric acid, it is possible to implement a white color.
일례로써, 상기 알루미나는, 상기 전해질 용액 내의 크롬, 티타늄 또는 바나듐이 반응하여 상기 산화 알루미늄 코팅층(200)은 푸른색을 나타낼 수 있다. As an example, the aluminum oxide coating layer 200 may exhibit a blue color when chromium, titanium, or vanadium in the electrolyte solution reacts with the alumina.
일례로써, 상기 알루미나와 상기 전해질 용액 내 산화크롬이 반응하면 상기 산화 알루미늄 코팅층(200)은 붉은색으로 구현될 수 있다. 그 밖의 파스텔 컬러들은 상기 알루미나와 상기 전해질 용액 내의 성분과 그 농도에 따라서 다양하게 구현할 수 있다.As an example, when the alumina reacts with chromium oxide in the electrolyte solution, the aluminum oxide coating layer 200 may be implemented in a red color. Other pastel colors can be implemented in various ways according to the components and concentrations of the alumina and the electrolyte solution.
다른 예로, 상기 알루미나에서 반응할 수 있는 불순물들을 최대한 제거하여, 인조 화이트 무색투명 사파이어(Al2O3, 알루미나)의 형태로 제조하여 다이아몬드처럼 투명한 색상을 구현되기도 한다. As another example, impurities that can react with the alumina are removed as much as possible, and the color is transparent like diamond by manufacturing in the form of artificial white colorless and transparent sapphire (Al2O3, alumina).
상기 산화알루미늄 코팅층(200)의 두께는, 수십 nm 에서 수십 ㎛, 구체적으로, 10nm 내지 99㎛ 의 범위 내에서 용이하게 조절할 수 있고, 상기 코팅층은 균일한 성장이 가능하여 초기의 표면 구조를 연속적으로 구현할 수 있다. 이로써, 세라믹 코팅층의 내구성과 균일성을 확보할 수 있다. The thickness of the aluminum oxide coating layer 200 can be easily adjusted within a range of tens of nm to tens of μm, specifically, from 10 nm to 99 μm, and the coating layer can grow uniformly, so that the initial surface structure can be continuously can be implemented Thus, durability and uniformity of the ceramic coating layer can be secured.
상기 산화알루미늄 코팅층(200)은 기공을 다수개로 갖는 다공성 구조를 가질 수 있다. 상기 산화알루미늄 코팅층(200)은 내부에 단단하고 치밀한 구조를 형성함으로써, 음식물이 스며들지 않고, 알루미늄의 용출이 일어나지 않도록 하고, 우수한 내산성, 내열성 및 내식성을 제공할 수 있다. 예를 들어, 상기 기공은, 수 내지 수백 nm의 범위, 구체적으로는, 수 내지 수십 nm이하, 예를 들어, 100nm 이하, 다른 예로, 50nm 이하의 크기를 가질 수 있다. The aluminum oxide coating layer 200 may have a porous structure having a plurality of pores. By forming a hard and dense structure inside the aluminum oxide coating layer 200, food does not permeate, aluminum does not elute, and it can provide excellent acid resistance, heat resistance and corrosion resistance. For example, the pores may have a size in the range of several to hundreds of nm, specifically, several to several tens of nm, for example, 100 nm or less, and another example, 50 nm or less.
상기 전압은, 상기 산화알루미늄 코팅층을 형성하기 위하여 상기 알루미늄 합금층과 반대 전극 사이에서 인가될 수 있으며, 구체적으로, 상기 전압은 50 V 내지 300 V의 범위일 수 있다. 상기 전압이 50V 미만이면, 산화 피막의 절연파괴가 일어나지 않기 때문에 방전에 의한 플라스마가 형성되지 않을 수 있고, 300 V초과에서는 산화 피막의 형성 속도가 빨라서, 공정 제어가 어렵다는 문제가 있다.The voltage may be applied between the aluminum alloy layer and the counter electrode to form the aluminum oxide coating layer, and specifically, the voltage may be in the range of 50 V to 300 V. If the voltage is less than 50V, since dielectric breakdown of the oxide film does not occur, plasma due to discharge may not be formed, and if the voltage exceeds 300 V, the formation rate of the oxide film is fast, making it difficult to control the process.
적정한 인가 전류 밀도는 5 내지 20 A/dm2 범위일 수 있다. 상기 인가 전류 밀도가 5 A/dm2 미만일 경우에는 코팅층을 형성하는 시간이 너무 오래 걸려서 생산성이 떨어지는 단점이 있으며, 20 A/dm 2 이상일 경우에는 과도한 전력 소모로 인하여 경제성이 떨어진다. A suitable applied current density may be in the range of 5 to 20 A/dm2. When the applied current density is less than 5 A/dm 2 , it takes too long to form the coating layer, resulting in poor productivity, and when it is greater than 20 A/dm 2 , economical efficiency is poor due to excessive power consumption.
본 발명의 일 실시예에 따른 세라믹 코팅층 제조방법은, 종래의 아노다이징과 같이 전해액으로 황산 용액을 사용하지 않기 때문에 황산 이온의 잔류로 인한 인체 유해성을 없앨 수 있어서 친환경적이다. 또한, 산화 알루미늄층에 유/무기 안료를 첨가하여 착색하는 공정을 수행하지 않고도 산화 알루미늄층을 형성하는 하나의 공정만으로도 색상을 구현할 수 있다. 뿐만 아니라, 기존의 아노다이징 기술에서는 색상 구현이 흑색에 한정되어 있는 반면, 본 발명에 따르면, 화이트 또는, 핑크, 옐로우, 그린 및 블루 계열의 파스텔 색상까지, 기존에 비해 보다 다양한 범위의 색상 구현이 가능할 수 있다.The method for manufacturing a ceramic coating layer according to an embodiment of the present invention is eco-friendly because it can eliminate harmful effects to the human body due to residual sulfate ions because it does not use a sulfuric acid solution as an electrolyte like in conventional anodizing. In addition, the color can be implemented with only one process of forming the aluminum oxide layer without performing a process of adding organic/inorganic pigments to the aluminum oxide layer and coloring the aluminum oxide layer. In addition, while color implementation is limited to black in the existing anodizing technology, according to the present invention, it is possible to implement a wider range of colors than before, including white or pink, yellow, green and blue pastel colors. can
상기 세라믹 코팅층, 즉, 상기 알루미늄 합금층 및 상기 알루미늄 합금층 상에 형성된 산화 알루미늄 코팅층을 포함하는 세라믹 코팅층은, 100%의 세라믹으로 인체에 무해하고, 내부에 단단하고 치밀한 다공성 구조를 형성함으로써, 음식물이 스며들지 않고, 알루미늄의 용출이 일어나지 않도록 하고, 우수한 내산성, 내열성 및 내식성을 제공할 수 있다. The ceramic coating layer, that is, the ceramic coating layer including the aluminum alloy layer and the aluminum oxide coating layer formed on the aluminum alloy layer is 100% ceramic, harmless to the human body, and forms a hard and dense porous structure inside, It does not permeate, prevents elution of aluminum from occurring, and can provide excellent acid resistance, heat resistance and corrosion resistance.
전술한 본 발명의 설명은 예시를 위한 것이며, 본 발명이 속하는 기술분야의 통상의 지식을 가진 자는 본 발명의 기술적 사상이나 필수적인 특징을 변경하지 않고서 다른 구체적인 형태로 쉽게 변형이 가능하다는 것을 이해할 수 있을 것이다. 그러므로 이상에서 기술한 실시예들은 모든 면에서 예시적인 것이며 한정적이 아닌 것으로 이해해야만 한다. 예를 들어, 단일형으로 설명되어 있는 각 구성 요소는 분산되어 실시될 수도 있으며, 마찬가지로 분산된 것으로 설명되어 있는 구성 요소들도 결합된 형태로 실시될 수 있다.The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.
본 발명의 범위는 후술하는 청구범위에 의하여 나타내어지며, 청구범위의 의미 및 범위 그리고 그 균등 개념으로부터 도출되는 모든 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention.
본 발명의 실시를 위한 형태는 전술한 "발명의 실시를 위한 최선의 형태"에서 함께 기술되었다.Modes for carrying out the present invention have been described together in the above-mentioned "best mode for carrying out the invention".
본 발명은 알루미늄 소재에 대한 세라믹 코팅층 제조방법에 관한 것으로, 더욱 상세하게는 다양한 컬러 구현이 가능하면서도, 인체에 무해하고, 고내식성을 발휘할 수 있도록 하는, 세라믹 코팅층의 제조방법과 이를 포함하여 제조된 알루미늄 소재의 조리기구에 관한 것으로 산업상 이용가능성을 가지고 있다.The present invention relates to a method for manufacturing a ceramic coating layer for an aluminum material, and more particularly, to a method for manufacturing a ceramic coating layer capable of implementing various colors, harmless to the human body, and exhibiting high corrosion resistance, and a manufacturing method including the same It relates to aluminum cooking utensils and has industrial applicability.

Claims (7)

  1. 알루미늄 합금층을 준비하는 단계;Preparing an aluminum alloy layer;
    전이금속 산화물 염을 포함하는 전해질 용액을 준비하는 단계; 및Preparing an electrolyte solution containing a transition metal oxide salt; and
    상기 전해질 용액 하에 전압을 인가시켜 상기 알루미늄 합금층의 표면 상에 산화알루미늄 코팅층을 형성하는 단계; 를 포함하는, 알루미늄 소재의 세라믹 코팅층 제조방법.forming an aluminum oxide coating layer on the surface of the aluminum alloy layer by applying a voltage under the electrolyte solution; Including, a method for producing a ceramic coating layer of aluminum material.
  2. 제1항에 있어서,According to claim 1,
    상기 전해질 용액은, PH 1 내지 PH 14 범위를 나타내고, 칼륨(potassium), 인산염(phosphate), 나트륨(sodium), 암모늄 이온(ammonium), 옥살산(oxalic acid) 또는 시트르산(citric acid), 수산화나트륨(NaOH), 수산화칼륨(KOH), 규산나트륨(Na2SiO3), NaAl2, NaF, Na2CO3 및 NaF-Na2CO3 으로 이루어진 군에서 선택되는 1종 이상인 용질을 더 포함하는 것을 특징으로 하는, 알루미늄 소재의 세라믹 코팅층 제조방법.The electrolyte solution ranges from PH 1 to PH 14, and includes potassium, phosphate, sodium, ammonium ion, oxalic acid or citric acid, sodium hydroxide ( NaOH), potassium hydroxide (KOH), sodium silicate (Na 2 SiO 3 ), NaAl 2 , NaF, Na 2 CO 3 and NaF-Na 2 CO 3 Characterized in that it further comprises at least one solute selected from the group consisting of, a ceramic coating layer manufacturing method of aluminum material.
  3. 제2항에 있어서,According to claim 2,
    상기 전해질 용액의 용매는, 초순수이고,The solvent of the electrolyte solution is ultrapure water,
    상기 전이금속 산화물 염은, 크롬(Cr), 코발트(Co), 망간(Mn), 몰리브덴 (Mo), 니켈(Ni), 바나듐(V), 스칸디뮴(Sc), 타이타늄(Ti), 철(Fe), 구리(Cu), 이트륨(Y), 지르코늄(Zr), 루테늄(Ru), 팔라듐(Pd), 은(Ag), 카드뮴(Cd), 루테튬(Lu), 탄탈륨(Ta), 텅스텐(W), 레늄(Re), 란타늄(La), 네오디뮴(Nd) 및 가돌리늄(Gd)인 전이금속의 군에서 선택되는 하나 또는 둘 이상을 포함하는 전이금속 산화물 염인 것을 특징으로 하는, 알루미늄 소재의 세라믹 코팅층 제조방법.The transition metal oxide salt is chromium (Cr), cobalt (Co), manganese (Mn), molybdenum (Mo), nickel (Ni), vanadium (V), scandymium (Sc), titanium (Ti), iron ( Fe), copper (Cu), yttrium (Y), zirconium (Zr), ruthenium (Ru), palladium (Pd), silver (Ag), cadmium (Cd), lutetium (Lu), tantalum (Ta), tungsten ( W), rhenium (Re), lanthanum (La), neodymium (Nd), and gadolinium (Gd), a transition metal oxide salt comprising one or more selected from the group of transition metals, characterized in that, an aluminum-based ceramic Coating layer manufacturing method.
  4. 제3항에 있어서,According to claim 3,
    상기 산화알루미늄 코팅층은, 화이트 또는, 핑크, 옐로우, 그린 및 블루 계열의 파스텔 색상을 갖는 것을 특징으로 하는, 알루미늄 소재의 세라믹 코팅층 제조방법.The aluminum oxide coating layer is white or, characterized in that it has a pastel color of pink, yellow, green and blue series, a ceramic coating layer manufacturing method of aluminum material.
  5. 제4항에 있어서,According to claim 4,
    상기 산화알루미늄 코팅층은, 상기 전이금속의 군에서 선택되는 하나 또는 둘 이상과, 상기 용질에서, 칼륨(potassium), 인산염(phosphate), 나트륨(sodium), 암모늄 이온(ammonium), 옥살산(oxalic acid) 또는 시트르산(citric acid)의 반응에 의하여, 화이트 컬러를 구현하는 것을 특징으로 하는, 알루미늄 소재의 세라믹 코팅층 제조방법.The aluminum oxide coating layer is composed of one or two or more selected from the group of transition metals and, in the solute, potassium, phosphate, sodium, ammonium ion, oxalic acid Or, by the reaction of citric acid, a method for producing a ceramic coating layer of aluminum material, characterized in that to implement a white color.
  6. 제1항에 있어서,According to claim 1,
    상기 전압을 인가시킬 때, 적정 전압은 50 V 내지 300 V 범위이고, 적정 인가 전류 밀도는, 5 내지 20 A/dm2 인 것을 특징으로 하는, 알루미늄 소재의 세라믹 코팅층 제조방법.When applying the voltage, the appropriate voltage is in the range of 50 V to 300 V, and the appropriate applied current density is 5 to 20 A / dm 2 Characterized in that, the ceramic coating layer manufacturing method of aluminum material.
  7. 제1항 내지 제6 항 중 어느 한 항에 의한 알루미늄 소재의 세라믹 코팅층 제조방법에 의하여 제조된 알루미늄 소재의 세라믹 코팅층을 포함하는, 조리 기구.A cooking utensil comprising a ceramic coating layer of an aluminum material manufactured by the method of manufacturing a ceramic coating layer of an aluminum material according to any one of claims 1 to 6.
PCT/KR2021/018861 2021-09-27 2021-12-13 Method for manufacturing ceramic coating layer for aluminum material, and aluminum material cookware manufactured using same WO2023048342A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003253493A (en) * 2001-12-27 2003-09-10 Kansai Paint Co Ltd Method of forming colored coating on aluminum material
JP2006521473A (en) * 2003-03-25 2006-09-21 オリメクス グループ インコーポレイテッド Composite articles containing ceramic coatings
KR20100116546A (en) * 2009-04-22 2010-11-01 한양대학교 산학협력단 Method for treating the surface of metal
KR101419276B1 (en) * 2013-08-27 2014-07-15 (주)엠에스티테크놀로지 Coating method by plasma electrolytic oxidation
KR101846940B1 (en) * 2017-07-24 2018-04-09 (주)에스피텍 Forming method of protective coating for aluminum containing article

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003253493A (en) * 2001-12-27 2003-09-10 Kansai Paint Co Ltd Method of forming colored coating on aluminum material
JP2006521473A (en) * 2003-03-25 2006-09-21 オリメクス グループ インコーポレイテッド Composite articles containing ceramic coatings
KR20100116546A (en) * 2009-04-22 2010-11-01 한양대학교 산학협력단 Method for treating the surface of metal
KR101419276B1 (en) * 2013-08-27 2014-07-15 (주)엠에스티테크놀로지 Coating method by plasma electrolytic oxidation
KR101846940B1 (en) * 2017-07-24 2018-04-09 (주)에스피텍 Forming method of protective coating for aluminum containing article

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