KR100543292B1 - method of manufacturing an anti-fingerprint steel sheet with the low manufacturing cost and the environmentally friendly property - Google Patents
method of manufacturing an anti-fingerprint steel sheet with the low manufacturing cost and the environmentally friendly property Download PDFInfo
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- KR100543292B1 KR100543292B1 KR1020010081209A KR20010081209A KR100543292B1 KR 100543292 B1 KR100543292 B1 KR 100543292B1 KR 1020010081209 A KR1020010081209 A KR 1020010081209A KR 20010081209 A KR20010081209 A KR 20010081209A KR 100543292 B1 KR100543292 B1 KR 100543292B1
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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
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
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Abstract
본 발명은 소둔완료된 냉연강판 표면에 니켈도금층을 편면당 20 ~ 1000 mg/m2의 부착량으로 도금하고, 상기 니켈도금층 위에 내 지문 피막 코팅처리를 실시하는 것을 특징으로 하는 경제성이 높으며, 환경 친화성이 우수한 내지문 강판의 제조방법을 요지로 한다.The present invention is plated on the surface of the cold-rolled cold-rolled steel sheet with an adhesion amount of 20 ~ 1000 mg / m 2 per one side, and the fingerprint coating coating treatment on the nickel plated layer is high economical efficiency, environmental friendliness The manufacturing method of this excellent anti-fingerprint steel plate is made into a summary.
니켈도금층, 내지문 강판, 환경 친화성Nickel plated layer, anti-fingerprint steel plate, environmental friendliness
Description
본 발명은 경제성이 높으며, 환경 친화성이 우수한 내지문 강판의 제조방법에 관한 것으로, 더욱 상세히는 컴퓨터, 복사기 등과 같은 가전기기의 내 판으로 사용하기가 적합한 새로운 내 지문 강판에서, 특히 강판을 손으로 만질 때 발생하는 지문등에 의한 오염이 방지되고 또한 강판에 아연도금 및 크로메이트 처리를 박막의 니켈 도금으로 대체하여 생산원가 및 환경친화성이 우수한 내지문 강판의 제조방법에 관한 것이다.The present invention relates to a method of manufacturing an anti-fingerprint steel sheet having high economical efficiency and environmental friendliness, and more particularly, in a new anti-fingerprint steel sheet suitable for use as an inner plate of a home appliance such as a computer or a copying machine. The present invention relates to a method of manufacturing a fingerprint steel sheet having excellent production cost and environmental friendliness by preventing contamination by fingerprints, etc. generated when touching the steel sheet and replacing zinc plating and chromate treatment with nickel plating of the thin film.
일반적으로, 가전기기의 내 판용 강판으로 요구되는 특성은 강판에 도장처리를 하지 않고 사용하는 부위이기 때문에 강판 표면외관의 균일성이 유지되어야 한다. 이를 위해서는 강판 가공 및 제품 조립 시 작업자의 손에 의한 지문 발생이 억제되어야 하는 내지문성과, 강판 프레스 공정 등에서 기계적 가공을 받은 흔적이 적어야 하는 내 가공 흑화성, 운송 중 국부적인 마찰을 받은 강판부위가 검게 변하는 내 운송 흑점성, 용접 팁을 갈지 않고 연속으로 용접할 수 있는 회수가 많아야 하는 등의 품질이 필요하다. In general, since the characteristics required for the inner plate steel sheet of home appliances is a portion to be used without coating the steel sheet, the uniformity of the surface appearance of the steel sheet should be maintained. For this purpose, the fingerprints must be suppressed by the operator's hand during steel plate processing and product assembly, the blackening resistance that should be less mechanically processed in the steel plate pressing process, and the steel parts that are subjected to local friction during transportation. Quality such as transporting black spots that turn black and the number of times that welding can be performed continuously without grinding the welding tip is necessary.
또한 가전 제품은 주로 주택 혹은 사무실 등의 거의 부식성이 없는 환경 하에서 사용되고 있지만 가전 제품 수명이 다할 때 까지 녹이 발생하지 말아야 한다. In addition, home appliances are mainly used in almost non-corrosive environment such as houses or offices, but should not rust until the end of the life of the home appliances.
이러한 특성을 만족하기 위해 기존에는 강판 표면에 아연 도금 및 크로메이트 처리를 한 후에 내지문성을 갖는 피막 처리를 행한 내지문 강판이 사용하고 있다. 이때 강판 표면에 형성된 아연 도금 층은 강판의 내식성을 향상시키는 것을 목적으로 하고 있으며, 아연 도금 층 위의 크로메이트 피막은 아연 도금 층의 부식을 억제하기 위해 처리된 것이다. 그러나 이러한 피막은 주로 부식환경이 가혹한 자동차나 세탁기 등에 적용되어 아연 도금 층이 먼저 부식되면서 강판의 부식을 방지해 주는 희생방식 작용에 유용한 것이다. 그러나 내지문 강판이 주로 사용되는 오디오나 컴퓨터, 복사기 등과 같은 가전제품의 내 판은 가혹한 부식 분위기가 없는 환경이고, 아연 도금 층이 부식되어 표면외관이 열화 되는 것 만으로도 강판의 부식 저항능력은 다한 것으로 간주되기 때문에 자기 자신이 먼저 부식되는 희생방식능력을 가진 아연 도금 층과 아연 도금 층의 부식을 방지하기 위해 다시 크로메이트 피막을 처리하는 것은 내지문 강판에 용도에 바람직하지 않다. In order to satisfy such a characteristic, the anti-fingerprint steel plate which galvanized and chromate-treated on the surface of a steel plate, and then performed the coating process which has a fingerprint property is used. At this time, the galvanized layer formed on the surface of the steel sheet is intended to improve the corrosion resistance of the steel sheet, and the chromate coating on the galvanized layer is treated to suppress corrosion of the galvanized layer. However, such a coating is mainly applied to automobiles or washing machines with severe corrosive environments, so that the galvanized layer is corroded first, which is useful for the sacrificial method of preventing corrosion of the steel sheet. However, the inner plates of home appliances such as audio, computers, and copiers, where anti-fingerprint steel is mainly used, have no harsh corrosion atmosphere. It is considered desirable to use a chromate coating again to prevent corrosion of the galvanized layer and the galvanized layer with sacrificial anticorrosion ability of itself to be corroded first.
또한 내지문 강판에 발생하는 품질 문제인 용접성 저하, 가공부위 흑화 현상, 운송마찰에 의한 흑점발생, 고온 다습한 분위기에서 발생하는 흑변 현상, 환경에 유해한 크롬성분 함유 등의 문제가 아연 도금 층과 크로메이트 피막에 의해 발생한다고 하는 문제가 있다.In addition, problems such as deterioration of weldability, blackening of processed parts, black spots caused by transport friction, blacking phenomenon caused by high temperature and high humidity, and containing harmful chromium components in the environment of rusted steel sheets, etc. There is a problem that is caused by.
본 발명은 상기와 같은 요망에 의하여 안출된 것으로, 가전기기의 내 판용 강판으로 보다 저렴하며 제조하기가 용이할 뿐 아니라 크롬성분이 없어서 환경 친화적인 내지문 강판을 제공하는데 그 목적이 있다. The present invention has been made in accordance with the above requirements, it is an object of the present invention to provide an environmentally friendly anti-fingerprint steel sheet as it is cheaper and easier to manufacture as a steel sheet for inner plates of home appliances, as well as no chromium component.
이하 본 발명을 더욱 상세히 설명하기로 한다.Hereinafter, the present invention will be described in more detail.
본 발명은 상기 목적을 달성하기 위하여, 소둔완료된 냉연강판 표면에 니켈도금층을 편면당 20 ~ 1000 mg/m2의 부착량으로 도금하고, 상기 니켈도금층 위에 내 지문 피막 코팅처리를 실시하는 경제성이 높으며, 환경 친화성이 우수한 내지문 강판의 제조방법을 제공하는 것을 특징으로 한다.The present invention, in order to achieve the above object, the plated nickel plated layer on the surface of the annealing cold rolled steel sheet with an adhesion amount of 20 ~ 1000 mg / m 2 per side, high economic efficiency of performing an anti-fingerprint coating coating on the nickel plated layer, It is characterized by providing a method for producing an anti-fingerprint steel sheet excellent in environmental friendliness.
본 발명자는 가전용 내 판에 사용되는 내 지문 강판의 기존 문제점 들을 해소하고, 제조원가를 낮출 수 있는 방법에 대해 연구한 결과, 기존 아연도금 층과 크로메이트 피막처리 후 내지문 피막처리를 해서 생산되는 내 지문 강판을 니켈을 박막으로 도금한 후 내지문 피막처리를 하는 것이 유용하다는 것을 발견하였다.The present inventors have studied the method to solve the existing problems of the fingerprint steel sheet used in the inner plate of the home appliance, and to reduce the manufacturing cost, and as a result, after the galvanized layer and the chromate coating, It has been found to be useful to plate the fingerprint steel plate with a thin film of nickel and to carry out a fingerprint coating.
본 발명은 소둔 된 냉연강판 표면에 니켈 도금 층이 편 면 당 20 ~ 1000 mg/m2의 부착량 갖고 있으며, 그 도금 층 위에 통상 방법으로 내지문 피막 코팅공정을 거치는 것을 특징으로 하는 내지문성이 우수한 강판의 제조방법으로 상세한 제조조건을 살펴보면, 먼저, 상기 니켈의 도금 부착량을 20~1000mg/m2으로 제한하는 것은 20mg/m2보다 적을 경우에는 내식성이 충분하지 않기 때문이며, 1000mg/m2이하 로 유지하는 것은 그 이상도 가능하지만 1000mg/m2정도로도 충분한 내식성이 확보되기 때문이다. According to the present invention, the nickel plated layer has an adhesion amount of 20 to 1000 mg / m 2 per side on the surface of the annealed cold rolled steel sheet. Looking at the detailed manufacturing conditions of the steel sheet manufacturing method, first, the limit of the plating deposition amount of the nickel to 20 ~ 1000mg / m 2 is because the corrosion resistance is not sufficient when less than 20mg / m 2 , to less than 1000mg / m 2 It is possible to maintain more, but sufficient corrosion resistance is secured at about 1000 mg / m 2 .
강판에 니켈을 도금하는 방법은 전기도금, 무전해 도금, 진공도금 등이 모두 가능하지만, 고속으로 강판을 연속 생산하면서 가격이 저렴한 방법을 고려했을 때 전기 도금이 타당하다. Electroplating, electroless plating, vacuum plating, etc. can all be used for plating nickel on steel sheets, but electroplating is reasonable considering low-cost methods of continuous production of steel sheets at high speed.
강판에 니켈을 도금하는 공정은 연속소둔 공정에 포함되어 있는 니켈 플래쉬 공정을 이용할 수도 있고, 니켈 플래쉬 처리가 되어있지 않은 강판을 내지문 피복 공정 전에 별도의 도금설비에서 도금하는 방법이 있다.The plating of nickel on the steel sheet may use the nickel flash process included in the continuous annealing process, and there is a method of plating the steel sheet not subjected to nickel flash treatment in a separate plating facility before the rubbing coating process.
이하 본 발명의 실시예를 설명한다.Hereinafter, embodiments of the present invention will be described.
(실시예)(Example)
니켈 도금은 전기도금 방법을 이용하여 부착량 0~2000mg/m2 범위로 실시하였으며, 내지문 피막은 부착량 1000mg/m2을 기준으로 하였다. Nickel plating was carried out in the deposition amount 0 ~ 2000mg / m 2 range using an electroplating method, the anti-fingerprint coating was based on the adhesion amount 1000mg / m 2 .
내지문성은 수가사(SUGA)의 색차계인 Color & Color Difference Meter를 이용하여 백색 바세린 도포 전/후의 색상차이 정도(ΔE)를 5단계로 나누어 평가하였으며, 평가기준은 다음과 같다.Anti-fingerprints were evaluated by dividing the degree of color difference (ΔE) into five stages before and after the application of white petroleum using Color & Color Difference Meter, which is a color difference meter of SUGA.
1 : 색상차이 ΔE가 1.0 이하 1: color difference ΔE is 1.0 or less
2 : 색상차이 ΔE가 1.0 ~ 2.0 2: color difference ΔE is 1.0 to 2.0
3 : 색상차이 ΔE가 2.0 ~ 3.0 3: color difference ΔE is 2.0 to 3.0
4 : 색상차이 ΔE가 3.0 ~ 4.0 4: color difference ΔE is 3.0 to 4.0
5 : 색상차이 ΔE가 4.0 이상 5: Color difference ΔE is 4.0 or more
내식성는 항온 항습 시험기를 이용하여 평판부와 가공부를 나누어 평가하였는데 가공부의 경우 직경 30mm와 6mm높이의 돔을 만들었다. 이러한 시편을 항온 항습 시험기에서 온도 60oC, 상대 습도 85%의 조건에서 1년간 장 입 한 후 발생한 백 청이나 적 청 발생율로서 내식성을 평가하였다.Corrosion resistance was evaluated by dividing the flat plate and the processed part using a constant temperature and humidity tester. For the processed part, a dome having a diameter of 30 mm and a height of 6 mm was made. The specimens were evaluated for corrosion resistance as white or red blue color after one year of charging at a constant temperature and humidity tester at a temperature of 60 ° C and a relative humidity of 85%.
1 : 5% 이하 1: less than 5%
2 : 5~10% 2: 5 ~ 10%
3 : 10~20% 3: 10-20%
4 : 20~30% 4: 20 ~ 30%
5 : 30% 이상 5: 30% or more
용접성 평가를 위해 AC 공압식 점 용접기를 사용하여 용접전류 8kA에서 가압력 250Kgf, 통전시간 16 cycle의 조건으로 용접을 실시하였으며, 이때 용접전극은 Cu-Cr합금의 RWMA Class II를 사용하였다. For the evaluation of weldability, welding was carried out using the AC pneumatic spot welding machine under the welding pressure of 8kA and the pressurization pressure of 250Kgf and the energization time of 16 cycles.
용접성은 연속 타점성을 평가하였으며, 평가용 시편은 길이 80mm, 너비 20mm로 절단된 시편 두 장을 끝에서 20mm되는 지점까지 겹친 후, 겹친 부위의 가운데에 한 점 용접을 한 후 인장시험기를 이용해 용접부가 떨어지기 시작하는 타점 수를 조사하였으며, 이 타점 수를 연속 타점 수라고 하며, 평가기준은 다음과 같다.Weldability was evaluated by continuous flawability, and the test specimens were overlapped to the point where two specimens cut to 80mm in length and 20mm in width to the point of 20mm from the end, and then welded one point in the middle of the overlapped part, and then welded using a tensile tester. The number of RBIs that are starting to fall is called and the number of RBIs is called the number of consecutive RBIs.
1 : 연속 타점 수 4000 이상 1: 4000 consecutive runs
2 : 연속 타점 수 3000~4000 2: Continuous RBI 3000 ~ 4000
3 : 연속 타점 수 2000~3000 3: 2000-3000 consecutive RBIs
4 : 연속 타점 수 1000~2000 4: Continuous RBI 1000 ~ 2000
5 : 연속 타점 수 500~1000 5: 500-1000 consecutive RBIs
내 가공 흑화성은 시편을 45X300mm로 절단한 후 표면을 0.5kgf/mm2의 압력 하에서 1000mm/min의 속도로 1회 문질렀을 때, 문지르기 전/후의 백색도 변화를 조사하여 평가하였으며, 백색도는 SUGA사의 색차계인 Color & Color Difference Meter를 이용하였다. 평가기준은 다음과 같다.The blackening resistance was evaluated by examining the whiteness change before and after rubbing when the specimen was cut to 45X300mm and rubbed once at a speed of 1000mm / min under a pressure of 0.5kgf / mm 2 . Color & Color Difference Meter was used. Evaluation criteria are as follows.
1 : 백색도 차 0.5 이하1: whiteness difference 0.5 or less
2 : 백색도 차 1.0 이하 2: whiteness difference 1.0 or less
3 : 백색도 차 1.5 이하 3: whiteness difference 1.5 or less
4 : 백색도 차 2.0 이하4: whiteness difference less than 2.0
5 : 백색도 차 2.0 이상5: whiteness car 2.0 or more
내 흑변성은 항온 항습 시험기를 이용하여 온도 60oC, 상대 습도 85%의 조건에서 110시간 장 입 한 후, SUGA사의 색차계를 이용하여 초기의 백색도와 평가후의 백색도 차이로 표시하였으며, 평가기준은 내 가공 흑화성 평가와 같다.The black metamorphism was shown as the difference between the initial whiteness and the whiteness after the evaluation using a thermogram at 110 ° C at a temperature of 60 o C and a relative humidity of 85% using a constant temperature and humidity tester. It is the same as evaluation of processing blackening resistance.
표 1은 상기의 방법으로 평가한 시험에 대한 결과로서 비교 예 1과 같이 강판에 아연도금 및 크로메이트 처리를 한 후 내 지문 피막이 코팅처리 된 기존의 내지문 강판은 내식성은 양호하나 용접성, 내 가공 흑화성, 내 흑변성 등이 나쁜 것으로 나타났다.Table 1 shows the results of the test evaluated by the method described above. After the galvanizing and chromate treatment of the steel sheet as in Comparative Example 1, the conventional anti-fingerprint steel plate coated with the fingerprint coating has good corrosion resistance but weldability and black machining. Mars and black metabolism are bad.
비교 예 2와 같이 냉연강판에 내 지문 피막 만 코팅 되어 있는 경우와 같이 아연 도금 층과 크로메이트 피막 층이 없는 경우에는 아연 도금 층과 크로메이트 피막 층으로부터 기인한 용접성 열화나 가공 흑화 현상 등은 매우 개선되었으나, 내 지문 피막 만으로는 충분한 내식성을 발휘하지 못하는 것으로 나타났다. 또한 냉연강판에 니켈을 도금한 후 내지문 피막을 코팅하는 본 발명의 방법을 적용하였으나 니켈 부착량이 20mg/m2 미만인 경우(비교 예 3~5)에는 내 지문 피막을 통해 침투한 부식인자를 막기에는 니켈 도금 층의 두께가 너무 얇아 내식성이 충분하지 못한 것으로 나타났다.As in Comparative Example 2, when the galvanized layer and the chromate coating layer did not exist, such as the case where only the fingerprint coating was coated on the cold rolled steel sheet, weldability deterioration or blackening due to the galvanization layer and the chromate coating layer was greatly improved. However, the fingerprint film alone did not show sufficient corrosion resistance. In addition, the method of the present invention is applied to the cold-rolled steel plate after coating the nickel coating on the cold rolled steel sheet, but when the nickel adhesion amount is less than 20 mg / m 2 (Comparative Examples 3 to 5), the corrosion factor penetrated through the fingerprint coating film is prevented. The thickness of the nickel plated layer was too thin, indicating that the corrosion resistance was not sufficient.
그러나 발명 예에서 보는 바와 같이 냉연강판에 니켈 부착량을 20mg/m2이상으로 한 경우에는 기존 아연도금 및 크로메이트 처리 후 내 지문 피막을 코팅한 비교 예 1의 경우보다 용접성, 내 가공 흑화성, 내 흑변성 등이 크게 개선될 뿐만 아니라, 내식성도 양호한 것으로 나타났다. However, as shown in the invention example, in the case where the nickel adhesion amount on the cold rolled steel sheet is 20 mg / m 2 or more, weldability, blackening resistance, blackening resistance compared to the case of Comparative Example 1 in which the fingerprint coating was coated after conventional galvanization and chromate treatment In addition to the significant improvement in denaturation, the corrosion resistance was also good.
또한 비교예 6~7에서 보는 바와 같이 니켈 부착량이 1000mg/m2이상인 경우에도 품질특성은 발명 예의 경우와 같이 양호한 것으로 나타났으나, 생산비를 감안했을 때 니켈 도금 부착량은 20~1000mg/m2이면 충분한 것으로 나타났다.In addition, as shown in Comparative Examples 6-7, even if the nickel adhesion amount is 1000 mg / m 2 or more, the quality characteristics were found to be good as in the case of the invention example, but considering the production cost, the nickel plating adhesion amount is 20-1000 mg / m 2. Appeared to be sufficient.
* 우수 1 <-- 지표 --> 5 열등* Excellent 1 <-indicator-> 5 inferior
상술한 바와 같이, 본 발명에 의하면, 기존 내 지문 강판은 냉연강판에 아연도금과 크로메이트 처리를 한 후 내 지문 피막 코팅처리를 했던 것에 비해, 본 발명은 냉연강판에 니켈을 박 도금한 후 바로 내 지문 피막 처리를 한 것이기 때문에, 생산원가를 대폭으로 감소시킬 수 있을 뿐 아니라 크로메이트 처리 생략에 의한 환경 친화형 제품을 생산할 수 있다. As described above, according to the present invention, compared to the conventional fingerprint steel plate galvanized and chromate-treated after the cold-rolled steel sheet and the fingerprint coating coating treatment, the present invention is immediately after the plated nickel on the cold-rolled steel sheet Since the fingerprint coating is performed, not only the production cost can be greatly reduced, but also environmentally friendly products can be produced by omitting chromate treatment.
또한 아연 도금 층에 의해 나타나는 운송 흑점, 흑변, 가공 흑화, 용접성 열 화 등과 같은 기존 내 지문 강판의 품질문제를 모두 해결할 수 있는 효과도 있다. In addition, there is an effect that can solve all the quality problems of the existing fingerprint steel plate, such as transport sunspots, black stools, blackening process, deterioration of weldability, which is represented by the galvanized layer.
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|---|---|---|---|---|
| KR940008460A (en) * | 1992-09-23 | 1994-04-29 | 이인순 | Curvature spherical screen and its manufacturing method |
| JPH07241954A (en) * | 1994-03-01 | 1995-09-19 | Toyo Kohan Co Ltd | Surface treated steel panel excellent in abrasion resistance, fingerprint resistance and whitening resistance |
| KR19980028550A (en) * | 1996-10-23 | 1998-07-15 | 김종진 | Method for manufacturing anti-fingerprint surface treated steel sheet having excellent blackening resistance and surface appearance |
| JP2001164377A (en) * | 1999-12-08 | 2001-06-19 | Kawasaki Steel Corp | Black steel sheet |
| KR20010056221A (en) * | 1999-12-18 | 2001-07-04 | 이구택 | Method for manufacturing the good anti-corrosion and anti-finger sheet |
| KR20010060751A (en) * | 1999-12-28 | 2001-07-07 | 이구택 | Method for manufacturing anti finger steel sheet |
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- 2001-12-19 KR KR1020010081209A patent/KR100543292B1/en active IP Right Grant
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR940008460A (en) * | 1992-09-23 | 1994-04-29 | 이인순 | Curvature spherical screen and its manufacturing method |
| JPH07241954A (en) * | 1994-03-01 | 1995-09-19 | Toyo Kohan Co Ltd | Surface treated steel panel excellent in abrasion resistance, fingerprint resistance and whitening resistance |
| KR19980028550A (en) * | 1996-10-23 | 1998-07-15 | 김종진 | Method for manufacturing anti-fingerprint surface treated steel sheet having excellent blackening resistance and surface appearance |
| JP2001164377A (en) * | 1999-12-08 | 2001-06-19 | Kawasaki Steel Corp | Black steel sheet |
| KR20010056221A (en) * | 1999-12-18 | 2001-07-04 | 이구택 | Method for manufacturing the good anti-corrosion and anti-finger sheet |
| KR20010060751A (en) * | 1999-12-28 | 2001-07-07 | 이구택 | Method for manufacturing anti finger steel sheet |
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