KR19980028550A - Method for manufacturing anti-fingerprint surface treated steel sheet having excellent blackening resistance and surface appearance - Google Patents
Method for manufacturing anti-fingerprint surface treated steel sheet having excellent blackening resistance and surface appearance Download PDFInfo
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- KR19980028550A KR19980028550A KR1019960047654A KR19960047654A KR19980028550A KR 19980028550 A KR19980028550 A KR 19980028550A KR 1019960047654 A KR1019960047654 A KR 1019960047654A KR 19960047654 A KR19960047654 A KR 19960047654A KR 19980028550 A KR19980028550 A KR 19980028550A
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- 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
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
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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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
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- 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
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- 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
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
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- C25D3/00—Electroplating: Baths therefor
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- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
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- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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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
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- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
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- 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
- C25D3/22—Electroplating: Baths therefor from solutions of zinc
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Abstract
본 발명은 가전제품등에 사용되는 내지문 표면처리강판을 제조하는 방법에 관한 것으로써, 내흑변성 및 표면외관이 우수한 내지문 표면처리강판을 제조하는 방법을 제공하고자 하는데, 그 목적이 있다.The present invention relates to a method for manufacturing a fingerprint-treated steel sheet used in home appliances, etc., and to provide a method for producing a fingerprint-treated steel sheet excellent in blackening resistance and surface appearance.
본 발명은 내지문 표면처리강판을 제조하는 방법에 있어서, 전기아연도금후, 반응온도 : 40-60℃, 반응시간 : 5-20sec, 인가전류밀도 : 0.01-0.1A/d㎡의 조건으로 Ni 농도 10-50g/L인 용액에서 전기아연도금강판에 Ni 플래시 처리를 한 다음, 반응형 크로메이트 및 내지문 수지처리를 행하여 내흑변성 및 표면외관이 우수한 내지문 표면 처리강판을 제조하는 방법을 그 요지로 한다.The present invention provides a method for producing a rubbing surface-treated steel sheet, after electro-galvanizing, reaction temperature: 40-60 ℃, reaction time: 5-20sec, applied current density: 0.01-0.1A / dm2 under the conditions The present invention provides a method for producing an anti-fingerprint surface-treated steel sheet having excellent blackening resistance and surface appearance by subjecting the electro-galvanized steel sheet to Ni flash treatment in a solution having a concentration of 10-50 g / L, followed by reactive chromate and anti-fingerprint resin treatment. Shall be.
Description
본 발명은 가전제품등에 사용되는 내지문 표면처리강판을 제조하는 방법에 관한 것으로써, 보다 상세하게는 내흑변성 및 표면외관이 우수한 내지문 표면처리강판을 제조하는 방법에 관한 것이다.The present invention relates to a method for producing a fingerprint-treated steel sheet used in home appliances, and more particularly, to a method of manufacturing a fingerprint-treated steel sheet excellent in blackening resistance and surface appearance.
내지문 수지처리강판은 전기아연 도금강판 표면에 반응형 크로메이트 피막처리후 내지문 수지를 도포하는 공정으로 생산되는 공지의 기술이다. 반응형 크로메이트 피막은 도포형 및 전해형 크로메이트 피막에 비하여 우수한 표면외관 확보가 가능함으로 여러 제철소에서 공지의 확립된 기술로 사용되 오고 있다.Anti-fingerprint resin-treated steel sheet is a known technique produced by a process of applying a anti-fingerprint resin after the reactive chromate coating treatment on the surface of the galvanized steel sheet. Responsive chromate coatings have been used in many steel mills as well-known and established technologies because of their excellent surface appearance compared to the coated and electrolytic chromate coatings.
내지문용 수지로는 아크릴 및 실리카를 함유하는 수지등을 들 수 있고, 용액의 조성 및 도포처리방법은 공지의 기술로서 행하여져 오고 있다. 이러한 내지문 처리강판이 고온 다습한 지역으로 운송 혹은 장기간 보관시 표면이 시간이 지남에 따라 검은 색으로 변색되어 가는 소위“흑변현상”이 진행되어 표면외관이 불량해지는 것이 기술적 한계점으로 노출되었다. 이러한 흑변현상은 아연의 산화반응중 산소 부족분에 의한 ZnO1-X의 형성에 의한 것으로 알려져 있다. 일본국 공개특허(59-177, 381, 52-22618, 52-43171)등에서는 흑변현상을 해결하기 위하여 크로메이트 처리전에 Ni, Co, Fe등을 함유한 용액에 아연도금 강판을 침지석출시키는 기술을 제시하고 있다.Examples of the resin for the anti-fingerprint include resins containing acryl and silica, and the composition of the solution and the coating treatment method have been performed by known techniques. When these anti-rusted steel sheets are transported or stored for a long time in high temperature and high humidity areas, the so-called “black discoloration” which is discolored with black as time goes on is exposed as a technical limitation. This blackening phenomenon is known to be due to the formation of ZnO 1-X due to oxygen deficiency during the oxidation of zinc. Japanese Laid-Open Patents (59-177, 381, 52-22618, 52-43171) and the like disclose a technique of immersion precipitation of galvanized steel sheet in a solution containing Ni, Co, Fe, etc. before chromate treatment in order to solve the blackening phenomenon. Suggesting.
이러한 침지석출기술은 아연도금판의 그레인 바운더리를 따라 Ni, Co, Fe등의 천이금속이 석출하면서 아연산화물로의 반응진행을 억제하여 흑변성을 개선시키고자 한 것이다. 그러나, 이러한 방법으로 처리시 내흑변성은 개선되나 중금속(Ni, Co, Fe)등이 그레인바운더리를 따라 아연도금강판 표면에 집중적으로 석출함으로서 불균일 분포가 형성되어 표면외관성이 나빠지는 문제점이 있다.The immersion precipitation technique is intended to improve black denaturation by inhibiting the progress of the reaction with zinc oxide while the transition metals such as Ni, Co and Fe precipitate along the grain boundaries of the galvanized sheet. However, the blackening resistance is improved when treated in this way, but heavy metals (Ni, Co, Fe), etc. are concentrated on the surface of the galvanized steel plate along the grain boundary, thereby forming a non-uniform distribution, thereby deteriorating the surface appearance.
이에, 본 발명자들은 상기한 종래방법들의 제반문제점을 개선하기 위하여 연구 및 실험을 해하고, 그 결과에 근거하여 본 발명을 제안하게 된 것으로써, 본 발명은 전기아연 도금후 플래시 도금처리를 하므로써, 중금속이 아연도금 표면에 균일하게 분포되어 내흑변성 및 표면외관을 동시에 향상시킬 수 있는 내흑변성 및 표면외관이 우수한 내지문 표면처리강판의 제조방법을 제공하고자 하는데, 그 목적이 있다.Accordingly, the present inventors have conducted research and experiments to improve the problems of the conventional methods described above, and based on the results, the present invention proposes the present invention. It is an object of the present invention to provide a method for producing an anti-fingerprint surface-treated steel sheet excellent in blackening resistance and surface appearance, in which heavy metals are uniformly distributed on a zinc plated surface, thereby improving blackening resistance and surface appearance at the same time.
이하, 본 발명에 대하여 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated.
본 발명은 내지문 표면처리강판을 제조하는 방법에 있어서, 전기아연 도금후, 반응온도 : 40-60℃, 반응시간 : 5-20sec, 인가전류밀도 : 0.01-0.1A/d㎡의 조건으로 Ni 농도 10-50g/L인 용액에서 전기아연 도금강판엔 Ni 플래시 처리를 한 다음, 반응형 크로메이트 및 내지문 수지처리를 행하여 내흑변성 및 표면외관이 우수한 내지문 표면처리강판을 제조하는 방법에 관한 것이다.The present invention provides a method for producing a rubbing surface-treated steel sheet, after electro-zinc plating, Ni under the conditions of reaction temperature: 40-60 ℃, reaction time: 5-20sec, applied current density: 0.01-0.1A / dm 2 The present invention relates to a method for producing an anti-fingerprint surface-treated steel sheet having excellent blackening resistance and surface appearance by performing Ni flash treatment on an electro-zinc plated steel sheet in a solution having a concentration of 10-50 g / L, followed by reactive chromate and anti-fingerprint resin treatment. .
이하, 본 발명에 대하여 상세히 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.
본 발명에 따라 전기아연 도금강판을 Ni 플래시 처리하는 경우, 처리온도가 너무 낮은 경우에는 전착반응이 일어나지 않고, 너무 높은 경우에는 Ni의 과다부착으로 흑변성은 개선되나 백색도는 나빠지므로, Ni플래시 처리온도는 40-60℃로 제한하는 것이 바람직하다.In the case of Ni flash treatment of the galvanized steel sheet according to the present invention, when the treatment temperature is too low, the electrodeposition reaction does not occur, and when too high, the blackness is improved due to the excessive adhesion of Ni, but the whiteness worsens, so the Ni flash treatment temperature Is preferably limited to 40-60 ° C.
또한, Ni플래시 처리시간이 너무 짧은 경우에는 Ni이 거의 전착되지 않아 백색도는 향상되지만, 흑변성이 저하되고, 너무 긴 경우에는 Ni이 두껍게 전착되어 흑변성은 개선되나 백색도가 저하하게 되므로, Ni 플래시 처리시간은 Ni이 아연도금강판표면에 균일하게 전착될 수 있는 5-20초로 제한하는 것이 바람직하다.In addition, if the Ni flash treatment time is too short, Ni is hardly electrodeposited and the whiteness is improved. However, if the Ni flash treatment is too long, the black denaturation is reduced. The time is preferably limited to 5-20 seconds in which Ni can be evenly deposited on the surface of the galvanized steel sheet.
또한, Ni 플래시 처리시 인가전류밀도가 0.1A/d㎡ 미만인 경우에는 금속이온이 전기아연도금강판 표면의 그레인 바운더리(grain boundary)를 따라 우선 석출함으로써 백색도는 저하하지만, 내흑변성은 개선되고, 0.1A/d㎡를 초과하는 경우에는 내흑변성은 개선되지만, 인가하지 않은 경우보다 백색도는 더욱 저하되므로, 상기 인가 전류밀도는 0.01-0.1A/d㎡으로 제한하는 것이 바람직하다.In addition, when the applied current density is less than 0.1 A / dm 2 during Ni flash treatment, the metal ions are first precipitated along the grain boundary of the surface of the galvanized steel sheet, thereby reducing the whiteness, but improving the blackness resistance. When it exceeds A / dm 2, the blackening resistance is improved, but the whiteness is further lowered than when not applied, so the applied current density is preferably limited to 0.01-0.1 A / dm 2.
한편, Ni 플래시 처리시 처리용액중의 Ni 농도는 10-50g/L로 제한하는 것이 바람직한데, 그 이유는 Ni농도가 10g/L 미만인 경우에는 전기아연 도금강판 표면에 Ni플래시 처리되지 못하여 내흑변성 개선효과가 감소하고, 50g/L를 초과하는 경우에는 과량의 Ni이 석출함으로써, 내흑변성은 개선되나, 표면외관이 나빠지게 되기 때문이다.On the other hand, it is preferable to limit the Ni concentration in the treatment solution to 10-50 g / L during the Ni flash treatment, because when the Ni concentration is less than 10 g / L, the Ni-plated steel sheet cannot be Ni-flashed to prevent blackening. This is because the improvement effect decreases and when the excess exceeds 50 g / L, the precipitation of excess Ni improves the blackening resistance, but the surface appearance deteriorates.
그리고, Ni 플래시 용액으로는 NiSO4, NiCl2등 음이온화합물에 관계없이 목표하는 Ni 농도를 확보할 수 있는 것이라면 어느 것이나 사용가능하다.As the Ni flash solution, any one can be used as long as the desired Ni concentration can be secured regardless of anionic compounds such as NiSO 4 and NiCl 2 .
본 발명에 따라 Ni 플래시 처리시 Ni 부착량은 1-10㎎/㎡으로 선정하는 것이 바람직 하다.According to the present invention, the Ni adhesion amount during the Ni flash treatment is preferably selected to 1-10 mg / m 2.
상기와 같이 본 발명에 따라 Ni 플래시 처리후 행하는 반응형 크로메이트 처리 및 내지문 처리에 대하여 설명한다.As described above, the reactive chromate treatment and the fingerprint treatment performed after the Ni flash treatment will be described.
본 발명에 있어 크로메이트 및 내지문 수지부착량은 각각 통상 연속생산공정에서 적용되는 50-100㎎/㎡ 및 500-100㎎/㎡ 범위가 바람직 하다.In the present invention, the chromate and anti-fingerprint resin deposition amounts are preferably in the range of 50-100 mg / m 2 and 500-100 mg / m 2, which are usually applied in a continuous production process.
전기아연도금 강판 표면에 반응형 크로메이트 처리를 한 경우 크로메이트 피막은 Zn-Cr-O-OH의 화합물로 구성되면 Cr 은 대부분이 Cr+3의 안정한 화합물로서 존재하나 피막의 일부는 Cr+6로 존재한다. 크로메이트 피막이 고온 다습한 지역에 노출된 경우 외부 부식인자의(O2, H2O) 피막내 침투로 인하여 부식반응이 진행되며 피막내 존재하는 Zn의 ZnO 혹은 ZnO1-X로의 산화반응에 의하여 흑변이 진행된다. 반면, 도포형 크로메이트 피막은 반응형과는 달리 크로메이트 피막내에 Zn가 존재하지 않고 Cr+3와 Cr+6의 무수산화물로 구성되어 있으므로 고온 다습한 분위기에 노출되어도 Zn의 산화반응이 크로메이트 피막에 의하여 차폐됨으로 흑변이 진행되지 않는다. 흑변의 진행은 크로메이트 피막내에 존재하는 Zn의 산화에 의하여 진행됨으로 본 발명에서는 NiSO4, NiCl2를 사용하여 만든 Ni 용액에서 플래시 처리에 의하여 전기아연 도금강판 표면에 Ni 피막을 형성함으로서 Ni에 의한 Zn의 ZnO 혹은 ZnO1-X반응을 억제하여 내흑변성과 표면외관이 향상된 내지문 표면처리 강판을 제조한다.In the case of the reactive chromate treatment on the surface of the galvanized steel sheet, the chromate film is composed of a compound of Zn-Cr-O-OH.+3Exists as a stable compound of+6Exists as. If the chromate coating is exposed to hot and humid areas,2, H2O) Corrosion reaction proceeds due to penetration into the film and ZnO or ZnO of Zn in the film.1-XThe black side progresses by oxidation of the furnace. On the other hand, unlike the reactive type, the coated chromate film has no Zn in the chromate film and Cr+3And Cr+6of Since it is composed of an anhydrous oxide, even when exposed to a high temperature and high humidity atmosphere, the oxidation reaction of Zn is shielded by the chromate film, so that black side does not progress. The progression of the black side proceeds by oxidation of Zn present in the chromate coating, so in the present invention NiSO4, NiCl2Zn of ZnO or ZnO by Ni by forming Ni film on the surface of the galvanized steel sheet by flash treatment in Ni solution made using1-XBy suppressing the reaction, an anti-fingerprint surface-treated steel sheet having improved blackening resistance and surface appearance is produced.
이하, 실시예를 통해 본 발명을 보다 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.
(실시예)(Example)
아연 부착량이 20g/㎡인 전기아연 도금강판을 기판으로 사용하여 하기표 1에서와 같이 Ni 플래시 처리후 반응형 크로메이트 처리 및 내지문 수지처리를 실시한 후, 내지문 표면처리강판의 물성을 조사하고, 그 결과를 하기표 1에 나타내었다.After electrolytic zinc plated steel sheet having a zinc adhesion of 20 g / m 2 was used as a substrate, after the Ni flash treatment and the reactive chromate treatment and the anti-fingerprint treatment as shown in Table 1 below, the physical properties of the anti-finish surface treated steel sheet were investigated. The results are shown in Table 1 below.
플래시 처리는 Ni 함유(NiSO4, NiCl2) 10-50g/L 용액에 HNO3, H2SO4, HCl등으로 pH 2-5로 조절한 산성용액에서 처리온도 40℃-60℃, 처리시간 5-20초의 조건으로 전기 아연도금강판에 0.01-0.1A/d㎡ 전류를 인가함으로서 전기아연도금강판 표면에 Ni을 균일하게 1-10㎎/㎡ 부착시킨 후 반응형 크로메이트 처리를 실시하였다. 반응형 크로메이트 처리용액은 상용화된 용액(Cr+6: 0.3g/L, Cr+3: 0.1g/L, FA : 4-6pt,4 2 Flash treatment contains Ni (NiSO4, NiCl2) HNO in 10-50g / L solution3, H2SO4Galvanized steel sheet by applying 0.01-0.1A / dm2 current to the galvanized steel sheet under the conditions of 40 ℃ -60 ℃ and 5-20 seconds treatment time in acid solution adjusted to pH 2-5 with HCl Ni was uniformly attached to the surface of 1-10 mg / m 2 and then subjected to a reactive chromate treatment. The reactive chromate treatment solution is a commercialized solution (Cr+6: 0.3g / L, Cr+3: 0.1g / L, FA: 4-6pt,4 2
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960047654A KR100293216B1 (en) | 1996-10-23 | 1996-10-23 | Method for manufacturing finger-print resistance strips with superior surface appearance and blackening resistance |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019960047654A KR100293216B1 (en) | 1996-10-23 | 1996-10-23 | Method for manufacturing finger-print resistance strips with superior surface appearance and blackening resistance |
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| KR19980028550A true KR19980028550A (en) | 1998-07-15 |
| KR100293216B1 KR100293216B1 (en) | 2001-09-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010046724A (en) * | 1999-11-15 | 2001-06-15 | 이구택 | Manufacturing method of ni flash steel sheet for automobile outer plate member |
| KR100403463B1 (en) * | 1998-12-08 | 2004-01-28 | 주식회사 포스코 | Manufacturing method of nickel flash-plated steel sheet to attach nickel uniformly and finely over the whole steel plate |
| KR100543292B1 (en) * | 2001-12-19 | 2006-01-20 | 주식회사 포스코 | method of manufacturing an anti-fingerprint steel sheet with the low manufacturing cost and the environmentally friendly property |
| KR100848622B1 (en) * | 2001-12-22 | 2008-07-28 | 재단법인 포항산업과학연구원 | METHOD FOR MANUFACTURING NICKEL-Flash TREATED STEEL SHEET HAVING GOOD CORROSION RESISTANCE AND SURFACE TREATMENT CHARACTERISTICS |
-
1996
- 1996-10-23 KR KR1019960047654A patent/KR100293216B1/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100403463B1 (en) * | 1998-12-08 | 2004-01-28 | 주식회사 포스코 | Manufacturing method of nickel flash-plated steel sheet to attach nickel uniformly and finely over the whole steel plate |
| KR20010046724A (en) * | 1999-11-15 | 2001-06-15 | 이구택 | Manufacturing method of ni flash steel sheet for automobile outer plate member |
| KR100543292B1 (en) * | 2001-12-19 | 2006-01-20 | 주식회사 포스코 | method of manufacturing an anti-fingerprint steel sheet with the low manufacturing cost and the environmentally friendly property |
| KR100848622B1 (en) * | 2001-12-22 | 2008-07-28 | 재단법인 포항산업과학연구원 | METHOD FOR MANUFACTURING NICKEL-Flash TREATED STEEL SHEET HAVING GOOD CORROSION RESISTANCE AND SURFACE TREATMENT CHARACTERISTICS |
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| Publication number | Publication date |
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| KR100293216B1 (en) | 2001-09-17 |
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