KR20040046113A - A method for manufacturing of anti-finger steel sheets - Google Patents

A method for manufacturing of anti-finger steel sheets Download PDF

Info

Publication number
KR20040046113A
KR20040046113A KR1020020073935A KR20020073935A KR20040046113A KR 20040046113 A KR20040046113 A KR 20040046113A KR 1020020073935 A KR1020020073935 A KR 1020020073935A KR 20020073935 A KR20020073935 A KR 20020073935A KR 20040046113 A KR20040046113 A KR 20040046113A
Authority
KR
South Korea
Prior art keywords
resin
roughness
finger printing
friction
film conductivity
Prior art date
Application number
KR1020020073935A
Other languages
Korean (ko)
Other versions
KR100895581B1 (en
Inventor
노재원
Original Assignee
주식회사 포스코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR1020020073935A priority Critical patent/KR100895581B1/en
Publication of KR20040046113A publication Critical patent/KR20040046113A/en
Application granted granted Critical
Publication of KR100895581B1 publication Critical patent/KR100895581B1/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34Pretreatment of metallic surfaces to be electroplated
    • C25D5/36Pretreatment of metallic surfaces to be electroplated of iron or steel
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/38Chromatising
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48After-treatment of electroplated surfaces
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00Electroplating: Baths therefor
    • C25D3/02Electroplating: Baths therefor from solutions
    • C25D3/22Electroplating: Baths therefor from solutions of zinc

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

PURPOSE: A method for manufacturing an anti-finger printing strip is provided which secures superior surface frictional characteristics and superior coating film conductivity even at a low resin adhesion quantity by controlling roughness of the surface of the anti-finger printing strip to a proper level. CONSTITUTION: In a method for manufacturing an anti-finger printing strip after treating chromate on an electro-galvanized strip, the method comprises a step of controlling roughness of the surface of the anti-finger printing strip to Ra of 0.5 to 0.9 μm and Rmax of 3.5 to 5.5 μm; and a step of adhering anti-finger printing resin to the surface roughness controlled anti-finger printing strip in an adhesion quantity of anti-finger printing resin of 600 to 1,000 mg/m¬2.

Description

표면 마찰특성 및 피막 전도성이 우수한 내지문강판의 제조방법{A method for manufacturing of anti-finger steel sheets}A method for manufacturing of anti-finger steel sheets with excellent surface friction characteristics and film conductivity

본 발명은 컴퓨터 및 음향기기, VTR등 각종 가전기기 제품에 사용되는 내지문강판의 제조 방법에 관한 것으로서, 보다 상세하게는 전기아연도금강판에 크로메이트 처리후 내지문 수지를 도포함으로서 표면 마찰특성, 피막 전도성 등이 우수한 내지문강판 제조방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing anti-fingerprint steel sheets used in various home appliances such as computers, acoustic devices, and VTRs. It relates to an anti-fingerprint steel sheet manufacturing method excellent in conductivity.

일반적으로, 전기아연도금강판은 균일한 도금부착량, 소지철과 도금층과의 밀착성 및 우수한 표면외관 등의 특성을 가지고 있어서 가전제품이나 자동차 등의 패널용도로 많이 사용되고 있다. 그러나, 수요가의 가공공정에 투입될 때 작업장내의 유기물질이나 작업자의 손지문 등에 의해서 표면이 쉽게 오염되며, 오염된 부위는 외관불량, 내식성 및 도장성에 나쁜 영향을 미치기 때문에 전기아연도금강판 표면에 크로메이트 처리후 내지문 수지를 도포하는 내지문강판이 개발되어 사용되고있다.In general, electro-galvanized steel sheet has a uniform coating amount, adhesion between the base iron and the plating layer, and excellent surface appearance, and thus are widely used for panel applications such as home appliances and automobiles. However, the surface is easily contaminated by organic substances in the workplace or the fingerprint of the worker when it is put into the processing process of the demand, and since the contaminated parts adversely affect the appearance defect, corrosion resistance and paintability, After the chromate treatment, a fingerprint steel sheet for applying the fingerprint resin has been developed and used.

이와 같은 내지문강판에 있어서도 수요가에게 배송될 때나 가공과정의 마찰등에 의해 표면상에 눌린 흔적 및 표면결함(Scratch)이 발생되는 경우가 많다.In such anti-finger steel sheet, traces and surface scratches that are pressed on the surface are often generated due to friction when the product is delivered to the demand or processing.

따라서 상기와 같은 현상을 개선하기 위해 종래에는 수지용액중에 윤활 왁스(Wax)를 첨가하거나 수지부착량을 두껍게 부착시킴으로서 제품 표면의 마찰특성을 개선하게 되었다.Therefore, in order to improve such a phenomenon, conventionally, lubrication wax (Wax) is added to the resin solution or the resin adhesion amount is thickened to improve the friction characteristics of the product surface.

그러나 이와 같이 수지용액중에 윤활 왁스를 첨가하더라도 우수한 표면 마찰 특성 확보를 위해서는 수지 부착량을 통상 1100mg/㎡ 이상으로 확보하여야 만 한다. 단, 여기서 내지문강판의 우수한 표면 마찰특성은 마찰계수가 0.11이하이고 가공흑화성 △L≤1.0 인 수준을 말한다.However, even if lubricating wax is added to the resin solution, in order to secure excellent surface friction characteristics, the amount of resin adhered must usually be secured to 1100 mg / m 2 or more. However, here, the excellent surface friction characteristics of the steel plate refers to the level of the friction coefficient is 0.11 or less and the work blackening ΔL≤1.0.

하자만, 이와 같이 수지용액중에 윤활 왁스를 첨가 한다든지 수지부착량을 많이 부착할 경우에는 강판표면의 피막 전도성이 나빠지게 된다.However, when the lubricating wax is added to the resin solution or the resin adhesion amount is largely attached, the film conductivity of the steel sheet surface becomes poor.

특히, 전기아연도금 내지문강판은 많은 량이 컴퓨터의 패널, 음향기기, VTR, CD-ROM 케이스 및 각종 가전기기등에 적용되는데, 강판표면의 전기 전도성이 않 좋을 경우 컴퓨터 작동 시 발생하는 전자파의 외부 방출이 어려워져서 각종 오류 및 시스템 다운등을 발생시킬 우려가 있다. 따라서 상기와 같은 문제와 수지용액의 원단위 절감을 위해서는 내지문강판의 수지 부착량을 최소 수준까지 하향 시켜 관리해야 할 필요가 있다.In particular, galvanized or steel plate is applied to computer panels, acoustic devices, VTRs, CD-ROM cases and various home appliances, and the external emission of electromagnetic waves generated during computer operation when the electrical conductivity of the steel plate surface is not good. This becomes difficult and may cause various errors and system downtime. Therefore, in order to reduce the raw materials of the resin solution as described above and the resin solution, it is necessary to lower the resin adhesion amount of the steel plate to the minimum level.

그러나 종래에는 내지문강판 표면의 윤활성 확보를 위해 수지용액중에 윤활왁스를 첨가하는 기술로서 대한민국 공개특허공보 2001-0060752호에 개시되어는데, 이는 수지부착량을 1100mg/㎡ 이상으로 유지해야 하며, 피막전도성 확보를 위해 부착량을 1100mg/㎡ 이하로 낮출경우 마찰특성과 윤활성의 확보가 어려운 문제가 있다.However, conventionally disclosed in the Republic of Korea Patent Publication No. 2001-0060752 as a technique for adding a lubricating wax in the resin solution to secure the lubricity of the anti-fingerprint steel plate surface, which must maintain the resin deposition amount of more than 1100mg / ㎡, the film conductivity When the amount of adhesion is lowered to 1100 mg / m 2 or less for securing, it is difficult to secure friction characteristics and lubricity.

또한 종래에 내지문강판의 용접성 향상을 위해 수지용액중에 무기물(Si)의 비율을 높이는 기술로서 대한민국 공개특허공보 2001-0059587호에 수지부착량이 800mg/㎡ 이하로 낮은 경우에는 피막전도성이 우수하나 마찰특성은 극도로 열세해 지고, 반대로 수지부착량을 상향할 경우 마찰특성은 양호해지나 피막전도성이 열세해지는 단점이 있다.In addition, conventionally, as a technique of increasing the ratio of inorganic material (Si) in the resin solution to improve the weldability of anti-finger steel sheet, in the Republic of Korea Patent Publication No. 2001-0059587, when the resin adhesion amount is lower than 800mg / ㎡ or less, the film conductivity is excellent but friction The property is extremely inferior, and on the contrary, when the resin deposition amount is increased, the friction property is good but the film conductivity is inferior.

이와 같은 종래의 문제점을 해결하기 위해 본 발명에서는 내지문강판 표면의 조도를 적정수준으로 관리함으로서 낮은 수지 부착량에서도 우수한 표면 마찰특성을 확보하고 우수한 피막 전도성을 확보하는 내지문강판의 제조방법을 제공하는 데 그 목적이 있다.In order to solve such a conventional problem, the present invention is to provide a method of manufacturing a fingerprint steel sheet to ensure excellent surface friction characteristics and secure excellent film conductivity even at a low resin adhesion amount by managing the roughness of the fingerprint steel sheet surface at an appropriate level. Its purpose is to.

도 1은 본 발명에 있어서 내지문강판 표면의 조도와 수지부착량에 따른 마찰특성과 피막 전도성의 관계를 나타내는 모식도.BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram showing the relationship between the friction characteristics and the film conductivity according to the roughness of the to-finite steel sheet surface and the resin deposition amount in the present invention.

따라서 본 발명은 전기아연도금강판에 크로메이트 처리후 내지문강판을 제조하는 방법에 있어서, 내지문강판 표면의 조도를 Ra 0.5~0.9㎛, Rmax 3.5~5.5㎛로 제어하고, 내지문 수지 부착량을 600~1000mg/㎡ 으로 부착시키는 것을 특징으로 하는 표면 마찰특성 및 피막전도성이 우수한 내지문강판의 제조방법에 관한 것이다.Therefore, in the present invention, in the method of producing a to-steel plate after chromate treatment on the galvanized steel sheet, the roughness of the to-steel plate surface is controlled to Ra 0.5 ~ 0.9 ㎛, Rmax 3.5 ~ 5.5 ㎛, the anti-fingerprint resin adhesion amount 600 The present invention relates to a method for producing a steel plate having excellent surface friction characteristics and film conductivity, characterized by adhesion at ˜1000 mg / m 2.

수준에서 우수한 표면 마찰특성과 피막전도성을 동시에 확보할 수 있는 것을 특징으로 하는 내지문강판 제조방법에 관한 것이다.It relates to an anti-fingerprint steel sheet manufacturing method characterized in that at the same time excellent surface friction characteristics and film conductivity can be secured at the same time.

이하, 본 발명에 대하여 상세히 설명하기로 한다.Hereinafter, the present invention will be described in detail.

본 발명의 내지문강판은 우수한 표면 마찰특성과 피막 전도성 향상을 위해 내지문강판 표면의 조도를 Ra 0.5~0.9㎛, Rmax 3.5~5.5㎛로 제어하여 통상대비 낮은 수준의 수지 부착량 600~1000mg/㎡ 에서 우수한 마찰특성과 피막전도성을 동시에 확보하는 것이다.The steel sheet according to the present invention has a low adhesion of the resin 600 to 1000 mg / m 2 by controlling the roughness of the surface of the steel sheet to Ra 0.5 to 0.9 μm and Rmax 3.5 to 5.5 μm for excellent surface friction characteristics and improved film conductivity. At the same time to ensure excellent friction characteristics and film conductivity.

도 1의 a 내지 d는 본 발명에 있어서 내지문강판 표면의 조도와 수지부착량에 따른 마찰특성과 피막 전도성의 관계를 모식도로 나타낸 것이다.1A to 1D schematically show the relationship between the friction characteristics and the film conductivity according to the roughness of the surface of the steel door and the resin deposition amount in the present invention.

도 1의 a에서 보는 바와 같이 내지문 강판 표면의 조도(거칠기)가 기존(또는 통상)과 같이 높은 수준의 0.9~1.3㎛에서 수지 부착량이 기존보다 적은 경우에는 피막전도성은 우수하나 표면의 높은 조도에 의해서 마찰계수가 높아지고 마찰특성은 나빠지게 된다. 또한 도 1의 b는 높은 수준의 조도와 수지 부착량이 많은 경우로서 거칠은 표면인 조도를 수지가 메꾸어 주게 되므로 마찰특성은 양호해지나 부도체인 수지층의 두께가 어느정도 높은 상태를 유지하게 되어 피막전도성은 보통수준이 된다. 또한 도 1의 c와 같이 조도가 기존보다 낮은 수준에서 수지 부착량이 기존보다 많은 경우에는 거칠은 표면 조도가 낮기 때문에 마찰특성은 양호해 지나 부도체인 수지층의 두께가 증가함에 의해 표면의 전기 전도성은 열세해 진다. 그러나 도 1의 d는 표면 조도가 낮고 수지 부착량이 기존보다 적은 경우로서 표면 마찰특성과 피막전도성이 동시에 우수해 진다.As shown in a of FIG. 1, when the roughness (roughness) of the anti-rust steel sheet surface is 0.9 to 1.3 μm at a high level as in the conventional (or conventional), when the resin adhesion amount is smaller than the existing, the film conductivity is excellent but the high roughness of the surface The friction coefficient becomes high and the friction property deteriorates. In addition, as shown in FIG. 1B, the resin has a high level of roughness and a large amount of resin adhesion, so that the resin fills up roughness, which is a rough surface, so that the friction property is good, but the thickness of the non-conductive resin layer is maintained to a certain degree. Is normal. In addition, as shown in c of FIG. 1, when the resin adhesion amount is higher than the conventional one at the roughness level lower than the existing one, since the rough surface roughness is low, the friction property is good, but the electrical conductivity of the surface is increased by increasing the thickness of the non-conductive resin layer. You are inferior. However, d of FIG. 1 is a case where the surface roughness is low and the resin adhesion amount is smaller than that of the conventional one, and thus the surface friction characteristics and the film conductivity become excellent.

따라서 내지문 강판의 우수한 표면 마찰특성 및 피막전도성의 확보를 위해서는 표면의 조도(거칠기)를 기존보다 낮게 관리해야 되는 것을 알수 있다.Therefore, in order to secure excellent surface friction characteristics and film conductivity of the anti-fingerprint steel sheet, it can be seen that the roughness (roughness) of the surface must be lowered than before.

상기와 같은 낮은 표면조도와 적은 수지 부착량에서 우수한 마찰특성과 피막전도성 확보가 가능한 본 발명의 내지문강판 제조시 표면 조도를 Ra 0.5~0.9㎛, Rmax 3.5~5.5㎛로 제한하는 이유는 강판표면 조도가 Ra 0.5㎛ 미만 및 Rmax 3.5㎛ 미만시에는 표면 마찰특성 및 피막 전도성은 우수하나 내지문강판에 대한 고객사에서 도장처리시 도장밀착성이 열세해 지고, 표면 전도성이 확보되지 않기 때문이다.The reason for limiting the surface roughness to Ra 0.5 ~ 0.9㎛, Rmax 3.5 ~ 5.5㎛ in the production of the steel plate of the present invention, which can secure excellent frictional properties and film conductivity at low surface roughness and low resin adhesion amount as described above, is because When Ra is less than 0.5㎛ and Rmax is less than 3.5㎛, the surface friction characteristics and film conductivity are excellent, but the paint adhesion is inferior and the surface conductivity is not secured when the coating process is applied to the door steel sheet.

또한 표면 조도를 Ra 0.9㎛ 초과 및 Rmax 5.5㎛ 초과시에는 앞에서 설명한 바와 같이 기존의 도 1의 b나 c에서 처럼 우수한 마찰특성 확보를 위해서는 수지부착량을 높게 관리해야 하며, 이로인해 피막전도성도 열세해지는 이유 때문이다.In addition, when the surface roughness exceeds Ra 0.9 μm and Rmax 5.5 μm, as described above, in order to secure excellent friction characteristics as in the conventional b or c of FIG. 1, the resin adhesion amount must be managed high, which causes the film conductivity to deteriorate. Because.

그리고 본 발명에서 Ra와 Rmax를 동시에 제한하는 이유는 통상 Ra와 Rmax는 같은 거동을 나타내지만 동일한 Ra에서도 Rmax는 극단적으로 높게 나타날수가 있기 때문에 동시에 제한하게 되었다. 즉, Ra는 기준을 만족했지만 Rmax가 기준을 벗어나게 되면 목표로 하는 최적의 마찰특성 및 피막전도성의 확보가 완전해지지 않기 때문이고, Ra도 기준을 벗어나게 되면 마찬가지의 문제를 일으키게 된다.In the present invention, the reason for limiting Ra and Rmax at the same time is because the normal behavior Ra and Rmax shows the same behavior, but at the same Ra because Rmax may appear to be extremely high. In other words, Ra meets the standard, but if Rmax is out of the standard, the optimum friction characteristics and film conductivity of the target are not completely secured. If Ra is out of the standard, the same problem occurs.

또한, 수지부착량이 600mg/㎡미만에서는 강판 표면에 부착되는 수지부착량이 낮아서 적정 조도 수준이이라 할지라도 양호한 마찰특성을 얻는 것이 곤란하며, 또한 수지부착량이 1000mg/㎡을 초과시에는 강판 표면에 부착되는 수지부착량이 너무 높아서 강판 표면의 피막전도성이 불량해진다.In addition, when the resin deposition amount is less than 600 mg / m 2, the resin adhesion amount adhered to the surface of the steel sheet is low, so that it is difficult to obtain good friction characteristics even at an appropriate roughness level. Since the resin adhesion amount is too high, the film conductivity of the steel plate surface becomes poor.

그리고 전기아연도금강판의 표면 조도는 냉간압연 또는 소둔작업후 조질압연 조건에 의해 확보하는 것으로, 본 발명에서는 소둔후 조질압연시 워크롤(Work Roll) 표면 조도를 관리하여 확보하게 된다.And the surface roughness of the galvanized steel sheet is to be secured by the rough rolling conditions after the cold rolling or annealing operation, in the present invention is managed by ensuring the work rough (Work Roll) surface roughness during temper rolling after annealing.

이하 본 발명의 실시 예를 통해서 보다 상세하게 설명한다.Hereinafter, the present invention will be described in detail.

(실시 예)(Example)

본 발명에서 전기아연도금전 냉연제품 상태에서 조도를 다르게 부여하기 위해 연속소둔라인의 조질압연(Skin Pass Mill)처리시 워크롤의 조도를 Ra 1.0~2.5㎛로 차별화 하여 작업하였다. 계속해서 전기아연도금공정에서 20g/㎡의 아연도금을 실시한후 20mg/㎡의 크로메이트처리를 실시하고 내지문수지를 부착한 후 마찰계수, 가공흑화성, 피막전도성, 내식성 및 도장성을 평가하여 표 1에 나타내었다.In the present invention, in order to give different roughness in the state of the cold rolled products before electro-galvanizing, the roughness of the work roll during the rough pass (Skin Pass Mill) treatment of the continuous annealing line was differentiated to Ra 1.0 ~ 2.5㎛. Subsequently, zinc plating of 20 g / m 2 was performed in the electro-zinc plating process, followed by chromate treatment of 20 mg / m 2, adhesion of fingerprint resin, and evaluation of friction coefficient, work blackening, film conductivity, corrosion resistance, and paintability. Shown in

표 1에서의 평가 기준은 다음과 같다.Evaluation criteria in Table 1 are as follows.

마찰계수는 시편을 길이 300mm, 폭 40mm로 절단하여 편면 마찰 시험기를 이용하여 마찰개소에 올려놓고 가압력 600Kg, 인발 속도는 분당 1,000mm로 하여 인발후 측정하였으며, 그 평가 기준은The friction coefficient was measured after drawing the specimen into 300mm in length and 40mm in width and placing it on the friction point using a single-sided friction tester. The pressing force was 600Kg and the drawing speed was 1,000mm per minute.

- ◎ 우수 : 마찰계수 0.10 이내-◎ Excellent: Less than 0.10 Friction Coefficient

- ○ 양호 : 마찰계수 0.11~0.13Good: Friction coefficient 0.11 ~ 0.13

- △ 미흡 : 마찰계수 0.14~0.16%-△ Insufficient: coefficient of friction 0.14 ~ 0.16%

- × 불량 : 마찰계수 0.16 초과-× Poor: Friction coefficient over 0.16

가공흑화성은 마찰시험후 표면에 형성된 눌린 부위와 정상부위의 백색도 차이(△L) 를 평가하였다.Process blackening was evaluated for the difference in whiteness (ΔL) between the pressed part and the normal part formed on the surface after the friction test.

- ◎ 우수 : △L 1.0 이내-◎ Excellent: Within △ L 1.0

- ○ 양호 : △L 1.1~1.5-Good: △ L 1.1 ~ 1.5

- △ 미흡 : △L 1.6~2.5-△ Insufficient: △ L 1.6 ~ 2.5

- × 불량 : △L 2.5 초과-× Poor: △ L over 2.5

피막전도성은 강판표면에서 100mm 사이에 저항측정계의 두 전극을 접촉시켜 발생되는 저항 값으로 평가하였다.The film conductivity was evaluated by the resistance value generated by contacting two electrodes of the resistance measuring system between 100 mm on the surface of the steel sheet.

- ◎ 우수 : 전기저항 0.5Ω 이내-◎ Excellent: Within 0.5Ω of electric resistance

- ○ 양호 : 전기저항 0.6~1.0Ω-Good: Electrical resistance 0.6 ~ 1.0Ω

- △ 미흡 : 전기저항 1.1~2.0Ω-△ Insufficient: Electrical Resistance 1.1 ~ 2.0Ω

- × 불량 : 전기저항 2.0Ω 초과-× Poor: Electrical resistance exceeded 2.0Ω

내식성은 염수분무 시험기(5% NaCl, 35℃)를 이용하여 시간경과에 따라 백청발생 정도를 측정하였다.Corrosion resistance was measured using a salt spray tester (5% NaCl, 35 ℃) over time to determine the degree of white rust.

- ◎ 우수 : 96Hrs 염수분무시험후 백청발생 5% 이내-◎ Excellent: Within 5% of white rust after 96Hrs salt spray test

- ○ 양호 : 72Hrs 염수분무시험후 백청발생 5% 이내-Good: Within 5% of white rust after 72Hs salt spray test

- △ 미흡 : 48Hrs 염수분무시험후 백청발생 5% 이내-△ Insufficient: Within 5% of white rust after 48Hs salt spray test

- × 불량 : 48Hrs 염수분무시험후 백청발생 5% 초과-× Poor: Over 5% of white rust after 48Hs salt spray test

도장성은 멜라민알키드계 도료적용를 이용하여 정전스프레이 도장후 180℃에서 10분간 건조후 태핑(Tapping Test)를 실시하여 도장밀착성을 평가하였다.The paintability was evaluated by applying a melamine alkyd paint, followed by tapping test after drying at 180 ° C. for 10 minutes after electrostatic spray coating.

- ◎ 우수 : 도박박리 5% 이내-◎ Excellent: Within 5% of gambling

- ○ 양호 : 도막박리 6~10%-Good: 6 ~ 10% peeling off

- △ 미흡 : 도막박리 11~20%-△ Insufficient: 11 ~ 20%

- × 불량 : 도막박리 20% 초과-Bad: Over 20% of peeling

순번turn 조도(㎛)Roughness (㎛) 수지부착량(mg/㎡)Resin adhesion amount (mg / ㎡) 품질 특성Quality characteristics 비고Remarks RaRa RmaxRmax 마찰계수Coefficient of friction 가공흑화Black and white 전도도conductivity 내식성Corrosion resistance 도장성Paintability 1One 1.121.12 6.236.23 16501650 ×× 종래예Conventional example 22 0.960.96 5.855.85 730730 33 1.211.21 6.206.20 12301230 44 1.011.01 7.037.03 440440 ×× ×× 55 0.430.43 3.323.32 870870 비교예Comparative example 66 0.470.47 3.433.43 650650 77 0.380.38 3.103.10 11401140 ×× 88 0.550.55 3.583.58 450450 99 0.810.81 5.425.42 660660 발명예Inventive Example 1010 0.630.63 4.234.23 610610 1111 0.520.52 3.803.80 880880 1212 0.740.74 4.724.72 930930 1313 0.900.90 5.385.38 980980 1414 0.510.51 3.503.50 960960 1515 0.860.86 4.244.24 770770 1616 0.820.82 4.844.84 820820

상기 표 1의 1~4번은 종래예를 나타낸 것으로 종래예 1번의 경우 전기 전도성이 극히 불량한 것은 표면조도가 Ra 0.9㎛, Rmax 5.5㎛를 초과하면서 수지 부착량이 1650mg/㎡ 으로 과도하게 부착된 것 때문이며, 또한 종래예 2번과 4번은 표면조도가 Ra 0.9㎛, Rmax 5.5㎛를 초과하면서 수지 부착량이 각각 730mg/㎡, 440mg/㎡으로 극히 적어서 마찰특성과 가공흑화성이 미흡하거나 불량한 것으로 나타났다.Tables 1 to 4 of Table 1 show conventional examples, and in case of the conventional example 1, the electrical conductivity is extremely poor because the resin adhesion amount is excessively attached at 1650 mg / m 2 while the surface roughness exceeds Ra 0.9 μm and Rmax 5.5 μm. In addition, in the conventional examples 2 and 4, the surface roughness exceeded Ra 0.9 μm and Rmax 5.5 μm, and the resin adhesion amount was extremely small at 730 mg / m 2 and 440 mg / m 2, respectively, indicating that the friction characteristics and work blackening properties were insufficient or poor.

따라서 종래예에는 표면조도가 Ra 0.9㎛, Rmax 5.5㎛를 초과하는 경우에 내지문제품의 우수한 마찰특성, 가공흑화성 확보를 위해서는 수지 부착량이 1100mg/㎡ 이상 확보되어야 함을 알수 있고, 또한 수지부착량이 1100 mg/㎡ 이상으로 높을 경우에는 마찰특성, 가공흑화성은 양호하나 피막전도성이 떨어지는 것을 알수 있다. 반대로 상기 조도 조건에서 수지 부착량이 낮은 경우에는 피막 전도성은 우수하나 마찰특성, 가공흑화성은 미흡해지는 것도 알수 있다.Therefore, it can be seen that in the prior art, when the surface roughness exceeds Ra 0.9 μm and Rmax 5.5 μm, the resin adhesion amount must be secured at least 1100 mg / m 2 in order to secure excellent friction characteristics and processing blackening properties of the anti-fingerprint product. If it is higher than 1100 mg / m 2, it is understood that the friction characteristics and work blackening are good, but the film conductivity is inferior. On the contrary, when the resin adhesion amount is low under the above roughness condition, the coating conductivity is excellent, but the friction characteristics and work blackening are insufficient.

상기 표 1의 5~8은 비교 예를 나타낸 것이다. 내지문강판의 표면 조도가 Ra 0.5㎛ 미만 및 Rmax가 3.5㎛ 미만으로 낮은 경우에는 비교예 5 내지 7번처럼 수지 부착량 600~1000mg/㎡ 수준에서 마찰특성, 가공흑화성 및 내식성은 확보되나 피막전도성의 확보가 여려운 것을 알수 있으며, 도장밀착성도 미흡한 것으로 나타나고 있음을 알 수 있다. 또한 종래예 8번은 표면 조도가 Ra 0.5㎛ 이상 및 Rmax가 3.5㎛ 이상으로 본 발명의 범위를 만족하나 수지부착량이 450 mg/㎡ 으로 극히 적기 때문에 내식성은 확보되나 마찰특성, 가공흑화성 및 피막 전도성의 확보가 여려운 것을 알수 있다.5-8 of the said Table 1 show a comparative example. When the surface roughness of the anti-fingerprint steel sheet is lower than Ra 0.5 µm and the Rmax is lower than 3.5 µm, friction properties, blackening and corrosion resistance are secured at the deposition amount of 600 to 1000 mg / m 2 as in Comparative Examples 5 to 7, but the film conductivity It can be seen that it is difficult to secure, and the paint adhesion is also shown to be insufficient. In addition, in Example 8, the surface roughness of Ra 0.5 ㎛ or more and Rmax of 3.5 ㎛ or more satisfy the scope of the present invention, but since the resin adhesion amount is extremely small as 450 mg / m 2, corrosion resistance is secured, but friction characteristics, blackening and film conductivity are achieved. You can see that it is difficult to secure.

상기 표 1의 9~16은 본 발명의 예를 나타낸 것으로 내지문강판 표면의 조도를 Ra 0.5~0.9㎛, Rmax 3.5~5.5㎛ 수준에서 제어하고, 내지문 수지 부착량을 600~1000mg/㎡ 으로 부착시킬 경우 마찰특성, 가공흑화성 및 피막전도성과 내식성, 도장성이 모두 양호한 실적으로 확보 가능함을 알수 있다.9 to 16 of Table 1 show examples of the present invention to control the roughness of the surface of the steel plate at Ra 0.5-0.9 μm, Rmax 3.5-5.5 μm, and the adhesion amount of the anti-fingerprint resin at 600-1000 mg / m 2. In this case, it can be seen that the friction characteristics, blackening processability, film conductivity, corrosion resistance, and paintability can all be secured with good results.

상기와 같은 본 발명은 내지문강판 표면의 조도와 내지문수지 부착량을 적절히 조절함으로서 강판표면의 마찰특성 및 피막전도성을 동시에 확보 할수 있으며, 기존대비 내지문수지 부착량의 감소가 가능하게 되어 제조원가 절감 효과가 기대되고, 기존 내지문제품에서 상반된 품질 문제점인 마찰특성과 피막 전도성을 양호한 수준으로 동시에 확보가 가능하게 되어 품질향상 효과가 증대됨을 알 수 있다.The present invention as described above, by appropriately adjusting the roughness and the amount of the adhesive resin on the surface of the steel plate to secure the friction characteristics and film conductivity of the steel surface at the same time, it is possible to reduce the amount of adhesion to the fingerprint resin compared to the existing production cost reduction effect is expected In addition, it can be seen that the quality improvement effect is increased by being able to simultaneously secure the friction characteristics and the film conductivity, which are opposite quality problems in the existing anti-fingerprint products, to a good level.

Claims (1)

전기아연도금강판에 크로메이트 처리후 내지문강판을 제조하는 방법에 있어서, 내지문강판 표면의 조도를 Ra 0.5~0.9㎛, Rmax 3.5~5.5㎛로 제어하고, 내지문 수지 부착량을 600~1000mg/㎡ 으로 부착시키는 것을 특징으로 하는 표면 마찰특성 및 피막전도성이 우수한 내지문강판의 제조방법In the method for producing a steel plate after chromate treatment on the galvanized steel sheet, the roughness of the surface of the steel plate is controlled to Ra 0.5 to 0.9 µm and Rmax 3.5 to 5.5 µm, and the adhesion amount of the fingerprint is 600 to 1000 mg / m 2. Method for producing a steel plate with excellent surface friction characteristics and film conductivity, characterized in that attached to the
KR1020020073935A 2002-11-26 2002-11-26 A method for manufacturing of anti-finger steel sheets KR100895581B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020020073935A KR100895581B1 (en) 2002-11-26 2002-11-26 A method for manufacturing of anti-finger steel sheets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020020073935A KR100895581B1 (en) 2002-11-26 2002-11-26 A method for manufacturing of anti-finger steel sheets

Publications (2)

Publication Number Publication Date
KR20040046113A true KR20040046113A (en) 2004-06-05
KR100895581B1 KR100895581B1 (en) 2009-04-29

Family

ID=37341714

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020020073935A KR100895581B1 (en) 2002-11-26 2002-11-26 A method for manufacturing of anti-finger steel sheets

Country Status (1)

Country Link
KR (1) KR100895581B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220080792A (en) * 2020-12-07 2022-06-15 삼성전자주식회사 Manufacture method of coated steel sheet for refrigerator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3389059B2 (en) * 1997-06-05 2003-03-24 新日本製鐵株式会社 Method for producing surface-treated steel sheet excellent in fingerprint resistance and grounding property
JP2000248369A (en) * 1998-12-29 2000-09-12 Nippon Steel Corp Non-chromium type surface treated metallic sheet
JP3480356B2 (en) * 1999-03-02 2003-12-15 Jfeスチール株式会社 Galvanized steel sheet for vending machine can rack
KR100423438B1 (en) * 1999-12-28 2004-03-19 주식회사 포스코 Method for manufacturing anti finger steel sheet

Also Published As

Publication number Publication date
KR100895581B1 (en) 2009-04-29

Similar Documents

Publication Publication Date Title
KR20010060752A (en) Anti finger resin solution and method for manufacturing anti finger steel sheet using the solution
WO2017052306A1 (en) Method for manufacturing plated steel sheet having excellent surface quality and press formability, and plated steel sheet manufactured thereby
CN103080385A (en) Galvanized carbon steel with stainless steel-like finish
WO2014003020A1 (en) Rolled copper foil, method for producing same, and laminate plate
CN111748758A (en) Lubricating hot-dip galvanized steel plate with excellent adhesiveness and manufacturing method thereof
KR100895581B1 (en) A method for manufacturing of anti-finger steel sheets
JP2010064293A (en) Coated aluminum plate and aluminum can lid
JP4757564B2 (en) Pre-coated metal plate, method for producing the same, and painted metal molded product
KR101615456B1 (en) Resin coated steel sheet having improved adhesion with resin layer and method for manufacturing the same
JPH0577357A (en) Resin coated composite steel plate excellent in after-processing appearance
KR100423438B1 (en) Method for manufacturing anti finger steel sheet
JP4324093B2 (en) Precoated metal sheet excellent in workability and stain resistance and method for producing the same
KR101657818B1 (en) Black resin coating composition and black resin steel sheet
KR20070071956A (en) Method of high anti-fingerprinting resin coated steel sheets has a high corrosion resistance, excellent formability
JP3389059B2 (en) Method for producing surface-treated steel sheet excellent in fingerprint resistance and grounding property
JP3588373B2 (en) Black pre-coated steel sheet with excellent pressure mark resistance
JP2009049077A (en) Resin-coated aluminum alloy plate material for aluminum electrolytic capacitor case, aluminum electrolytic capacitor case, and aluminum electrolytic capacitor
KR20020052728A (en) Manufacturing method of galvanized steel sheet with excellent surface appearance and brightness
KR20030004815A (en) Manufacturing method for anti-fingerprint steel plate
JP3320819B2 (en) Stainless steel plate with excellent workability and conductivity
JP2003207431A (en) Method for evaluating drawability and method for manufacturing sheet steel
JP3296210B2 (en) Galvanized steel sheet for organic resin coated steel sheet excellent in processing adhesion and corrosion resistance and method for producing the same
KR100700379B1 (en) A Method for Preparing Colored Steel Sheet with Single Side Embossed
JP3218420B2 (en) Guard film-free black pre-coated steel sheet with excellent punching resistance
JPH09263967A (en) Production of galvanizing-coated steel sheet excellent in fingerprint resistance and glosiness

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20130422

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20140418

Year of fee payment: 6

LAPS Lapse due to unpaid annual fee