KR920002170B1 - Clad Aluminum-Zinc Alloy Coated Steel Sheet - Google Patents
Clad Aluminum-Zinc Alloy Coated Steel Sheet Download PDFInfo
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- KR920002170B1 KR920002170B1 KR1019850004770A KR850004770A KR920002170B1 KR 920002170 B1 KR920002170 B1 KR 920002170B1 KR 1019850004770 A KR1019850004770 A KR 1019850004770A KR 850004770 A KR850004770 A KR 850004770A KR 920002170 B1 KR920002170 B1 KR 920002170B1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/20—Lubricating compositions characterised by the base-material being a macromolecular compound containing oxygen
- C10M107/22—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M107/28—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/54—Lubricating compositions characterised by the base-material being a macromolecular compound containing atoms of elements not provided for in groups C10M107/02 - C10M107/52
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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
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/12—Aluminium or alloys based thereon
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/086—Chromium oxides, acids or salts
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
- C10M2209/0845—Acrylate; Methacrylate used as base material
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Abstract
내용 없음.No content.
Description
제1도 및 제2도는 로울 성형에 의한 성형품의 단면 형상도.1 and 2 are cross-sectional shapes of the molded article by roll forming.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1, 2 : 성형품1, 2: molded articles
본 발명은 피복처리가 시행된 알루미늄-아연합금도금강판에 관한 것이다.The present invention relates to an aluminum-zinc alloy plated steel sheet subjected to a coating treatment.
알루미늄-아연합금도금강판은 알루미늄이 4 내지 75 중량%, 나머지의 태반이 아연, 또한 Si, Mg, Ce-La 등 제3성분이 미량 함유되는 함금에 의해서 도금된 강판이다. 현재 제품화되어 있는 알루미늄-아연합금도금강판은 알루미늄을 4 내지 10 중량%, 나머지 태반을 아연, 및 미량의 Mg 또는 Ce-La를 배합한 합금을 도금한 저 알루미늄-아연합금도금강판과, 알루미늄을 55 중량%, 아연을 43.4 중량%, Si을 1.6 중량% 배합한 합금을 도금한 고(高) 알루미늄-아연합금도금강판의 2종류가 있다. 그래서 통상 일반적으로 사용되고 있는 용융아연도금강판에 비하여 도금층이 같은 두께의 경우, 내식성에 있어서 저 알루미늄-아연합금도금강판은 1.5 내지 2배, 고 알루미늄-아연합금도금강판은 3 내지 6배의 뛰어난 성질을 갖고 있다. 또한 고 알루미늄-아연합금도금강판의 경우에는 내열성이나 열반사성에 있어서도 우수하다.An aluminum-zinc alloy plated steel sheet is a steel plate plated with a metal containing 4 to 75% by weight of aluminum, the remaining placenta is zinc, and a small amount of a third component such as Si, Mg, Ce-La, and the like. The currently commercialized aluminum-zinc alloy plated steel sheet is a low aluminum-zinc alloy plated steel plate coated with an alloy containing 4 to 10% by weight of aluminum, zinc in the remaining placenta, and a small amount of Mg or Ce-La, and aluminum. There are two types of high aluminum-zinc alloy plated steel plates coated with an alloy containing 55 wt%, 43.4 wt% zinc and 1.6 wt% Si. Therefore, when the plating layer is the same thickness as that of the commonly used hot-dip galvanized steel sheet, the corrosion resistance is 1.5 to 2 times that of the low aluminum zinc alloy plated steel and 3 to 6 times that of the high aluminum zinc alloy plated steel sheet. Have In addition, the high aluminum-zinc alloy plated steel sheet is also excellent in heat resistance and heat reflectivity.
이와 같이 알루미늄-아연합금도금강판은 뛰어난 성질을 갖었기 때문에 최근 특히 주목되어 지붕재료나 벽재료등의 건재제품, 가이드레일, 방음벽, 방설책, 배수구등 토목제품의 재료,자동차, 가전제품, 산면처리액인 수지조성물을 알루미늄-아연합금도금강판의 도금표면에 도포하여 표면처리를 하도록 하는 것이나 도포에 있어서는 알루미늄-아연합금도금강판의 표면에 유지, 먼지등의 오염을 제거한 후 침지, 스프레이,솔칠, 로울코우터, 에어나이프, 정전도포등 통상의 도포수단을 사용하여 행할 수가 있다. 그리고 이와 같이 도포를 한후에 열풍 건조장치나 원(遠)적외 가열장치, 유도가열장치등을 통하여 가열함으로써 수분을 증발시키고 건조시켜서, 알루미늄-아연합금도금강판의 표면에 수지피막을 형성시키는 것이다.As such, aluminum-zinc alloy-plated steel sheet has been particularly noticed in recent years, and thus has been particularly noticed. The resin composition, which is a treatment liquid, is applied to the plating surface of an aluminum-zinc alloy plated steel sheet for surface treatment. In the coating, the surface of the aluminum-zinc alloy plated steel sheet is kept immersed, and dirt is removed. , Roll coater, air knife, electrostatic coating, and the like can be carried out using conventional coating means. After the application, the water is evaporated and dried by heating through a hot air drying device, a far infrared heating device, an induction heating device, or the like to form a resin film on the surface of the aluminum-zinc alloy plated steel sheet.
이 수지피막은 알루미늄-아연합금도금강판의 양면에 형성되도록 하여도 되고, 또 편면만 형성되도록 하여도 무방하다. 여기서 수지피막의 피막량으로서는 로울성형이나 프레스형등의 가공 시에 있어서의 윤활성을 확보하기 위하여 건조중량으로 0.3 내지 5.0g/m2인 것이 요구되고, 특히 용접성이나 내식성, 원가면을 고려하면 1 내지 3g/m2가 바람직하다.The resin film may be formed on both sides of the aluminum-zinc alloy plated steel sheet, or may be formed only on one side thereof. Here, the film amount of the resin film is required to be 0.3 to 5.0 g / m 2 in dry weight in order to ensure lubricity in processing such as roll forming or press forming, and in particular, considering weldability, corrosion resistance, and cost surface, 1 To 3 g / m 2 is preferred.
피막량이 0.3g/m2미만이면 알루미늄-아연합금도금강판의 표면전면을 완전히 피복하기가 곤란하므로 목적으로 하는 내식성을 충분히 얻을 수가 없고, 또 5.0g/m2를 초과하면 용접성이 뒤떨어진다고 하는 문제가 생기고 원가면에서도 불리하게 된다.If the coating amount is less than 0.3 g / m 2, it is difficult to completely cover the entire surface of the aluminum-zinc alloy plated steel sheet, so that the desired corrosion resistance cannot be sufficiently obtained. If the coating amount exceeds 5.0 g / m 2 , the weldability is inferior. And disadvantages in terms of cost.
이와 같이 알루미늄-아연합금도금강판을 상기 수지조성물로 처리함에 있어서는 실제의 제조공정에 있어서는 알루미늄-아연합금도금강판의 제조설비에 있어서 강판을 도금용융금속조에서 도금처리하여 냉각한 후, 조질(調質)압연기(skinpass rolling mill)나 텐션레벨러(tension leveler)등의 표면형상 교정장치로 알루미늄-아연합금도금강판의 형상을 교정하고 이후에 수지조성물로 표면처리를 하도록하고 건조후에 냉각하여 텐션리일에 의해서 피복처리한 알루미늄-아연합금도금강판의 권취(卷取)를 하도록 하는 것이다. 그래서 상기와 같이하여 얻어지는 피복처리된 알루미늄-아연합금도금강판은 표면의 수지피막에 의해서 윤활성을 지녔고, 금속분말이 생기거나 하는 일이 적고, 로울성형이나 프레스성형등에 의한 가공을 할 수가 있다. 또 이 표면의 수지피막은 내식성이 뛰어난 동시에 다이렉트 페인트성에도 뛰어난 것이다.As described above, in treating the aluminum-zinc alloy plated steel sheet with the resin composition, in the actual manufacturing process, the steel sheet is plated in a molten metal bath and cooled in a manufacturing facility of an aluminum-zinc alloy plated steel sheet, and then tempered.質) The surface shape correction device such as skinpass rolling mill or tension leveler is used to correct the shape of aluminum-zinc alloy plated steel plate and then surface treatment with resin composition, and then cool it after drying to tension rail. By winding the coated aluminum-zinc alloy coated steel sheet by Therefore, the coated aluminum-zinc alloy plated steel sheet obtained as described above has lubricity by the resin coating on the surface, less metal powder is generated, and can be processed by roll forming or press forming. Moreover, the resin film on this surface is excellent in corrosion resistance and also in direct paintability.
다음에 본 발명을 실시예를 들어서 구체적으로 예증(例證)한다.Next, an Example is given and this invention is demonstrated concretely.
[실시예 1]Example 1
알루미늄-아연합금도금강판으로서, 판두께가 0.8mm이고, 폭이 914mm이고, 도금층의 조성이 Al=55 중량%, Zn=43.4 중량%, Si=16 중량%이고, 도금부착량이 편면에서 90g/m2인 것을 사용하였다.An aluminum-zinc alloy coated steel sheet, the plate thickness of which is 0.8 mm, the width is 914 mm, the composition of the plating layer is Al = 55% by weight, Zn = 43.4% by weight, Si = 16% by weight, and the plating amount is 90 g / s on one side. m 2 was used.
한편 수지조성물로서 아크릴산 에스테르, 메타크릴산에틸, 아크릴산공중합물(수지고형분 40 중량%, 산가40)500g/ι의 혼합물을 암모니아수로 pH로 6.5로 조정함으로써 조제한 것을 사용하였다. 그리고 상기 알루미늄-아연합금도금강판을 탈지처리한 후에 상기 수지조성물을 알루미늄-아연합금도금의 표면에 로울 코우터에 의해서 건조피막량이 2g/m2 ,크롬부착량이 25mg/m2로 되도록 도포하였다.On the other hand, the resin composition was prepared by adjusting a mixture of 500 g / ι of acrylic acid ester, ethyl methacrylate, and acrylic acid copolymer (40% by weight of solid content, acid value 40) to pH 6.5 with ammonia water. After degreasing the aluminum-zinc alloy plated steel sheet, the resin composition was applied to the surface of the aluminum-zinc alloy plate by a roll coater such that the dry coating amount was 2 g / m 2 and the chromium adhesion amount was 25 mg / m 2 .
이후 즉시 120℃에서 9초간 열풍건조시킴으로써 수지피막으로 표면처리한 알루미늄-아연합금도금강판을 얻었다. 이때의 판의 온도는 60℃였다. 이것을 냉각하여 시험편으로 하였다.Immediately thereafter, hot air drying was performed at 120 ° C. for 9 seconds to obtain an aluminum-zinc alloy plated steel sheet surface treated with a resin coating. The temperature of the plate at this time was 60 degreeC. This was cooled and it was set as the test piece.
[실시예 2]Example 2
알루미늄-아연합금도금강판으로서 판두께가 0.4mm이고, 폭이 190mm이고, 도금층의 조성이 Al=55 중량%, Zn=43.4 중량%이고, Si=1.6 중량%이고, 도금부착량이 편면에서 80g/m2인 것을 사용하였다.Aluminum-zinc alloy coated steel sheet with a plate thickness of 0.4 mm, a width of 190 mm, and a plated layer composition of Al = 55 wt%, Zn = 43.4 wt%, Si = 1.6 wt%, and the plating amount was 80 g / s on one side. m 2 was used.
기타는 실시예 1과 동일한 수지조성물에 의한 처리를 하여 시험판을 얻었다.Others were treated with the same resin composition as in Example 1 to obtain a test plate.
[비교예 1]Comparative Example 1
상기예 2에 있어서와 동일한 알루미늄-아연합금도금강판을 사용하여 이것에 수지조성물에 의한 처리를 하지 않고 탈지처리만을 한 것을 시험판으로 하였다.Using the same aluminum-zinc alloy plated steel sheet as in Example 2 above, the sample was subjected to only a degreasing treatment without treatment with a resin composition.
[비교예 2]Comparative Example 2
실시예 2와 동일한 탈지가 끝난 알루미늄-아연합금도금강판에 크롬산이 10g/ι이고, 불화물이 1g/ι인 조성으로 이루어진 크롬산염액을 실시예 1과 동일하게 하여 로울 코우터에 의해 도포하여 건조시키고, 이것을 시험판으로 하였다. 이 시험판의 크롬부착량을 형광 X선법으로 측정한바 25mg/m2였다.In the same degreasing aluminum-zinc alloy plated steel sheet as in Example 2, a chromate solution having a composition of 10 g / ι of chromic acid and 1 g / ι of fluoride was applied in the same manner as Example 1 and dried by a roll coater. This was made into a test board. It was 25 mg / m <2> when the chromium adhesion amount of this test plate was measured by the fluorescent X-ray method.
[비교예 3]Comparative Example 3
비교예 2와 동일한 크롬산염처리가 끝난 알루미늄-아연합금도금강판에 에멀션계왁스(존슨 No.700, 존슨사제 1.5qofh 물로 희석)를 스프레이에 의해서 15ml의 도포량으로 도포하여 건조시킨 것을 시험판으로 하였다.An emulsion-based wax (Johnson No. 700, diluted with 1.5qofh water made by Johnson) was sprayed onto a chromate-treated aluminum-zinc alloy-coated steel sheet similar to Comparative Example 2 by spraying, and then dried to obtain a test plate.
[비교예 4][Comparative Example 4]
비교예 2와 동일한 크롬산염 처리가 끝난 알루미늄-아연합금도금강판에 광유계왁스(신도오루 3411, 보튼사제)를 스프레이에 의해서 15ml/m2의 도포량으로 도포하고, 건조된 것을 시험판으로 하였다.Mineral oil wax (Shindoru 3411, manufactured by Bowton) was applied to the chromate-treated aluminum-zinc alloy plated steel sheet similar to Comparative Example 2 by spraying at a coating amount of 15 ml / m 2 , and the dried one was used as a test plate.
[비교예 5][Comparative Example 5]
강판으로서 판두께가 0.4mm이고, 폭이 190mm이고 도금부착량이 JIS에 규격된 Z25인 용융아연도금강판(아연철판)을 사용하고 이 표면을 약 알칼리탈지제＜파르코클리너 324(parco cleaner 324)(등록상표), 니혼파아카라이징사제＞에 의해 60℃에서 20초간 스프레이 탈지하고, 이어서 10초간 스프레이 수세한 후 열풍건조하고, 이것에 비교예 2와 동일한 크롬산염 처리를 행함으로써 시험판으로 하였다.As a steel plate, a hot dip galvanized steel sheet (zinc iron sheet) having a thickness of 0.4 mm, a width of 190 mm, and a plated coating amount of Z25 in accordance with JIS was used, and this surface was used as a weak alkali degreasing agent <parco cleaner 324 (parco cleaner 324) Trademark), and Nippon Fara Kaoring Co., Ltd.> spray degreasing at 60 ° C. for 20 seconds, followed by spray washing with water for 10 seconds, followed by hot air drying, to give a test plate having the same chromate treatment as in Comparative Example 2.
상기 실시예 1,2 및 비교예 1,2,3,4,5에서 얻은 시험판에 대하여 로울성형성, 내식성, 내변색(내흑변)성, 다이렉트페이트성의 각 성능시험을 하였다.The test plates obtained in Examples 1 and 2 and Comparative Examples 1, 2, 3, 4, and 5 were subjected to performance tests for roll formation, corrosion resistance, discoloration (black resistance), and direct fat resistance.
로울성형성 시험은 실시예 1의 것에 대해서는 길이가 1500m인 시험판을 코일로부터 풀으면서 매분 50m의 속도로 송급하고, 제1도에 표시한 바와 같은 단면형상의 성형품(1)에 산고(山高) h1=130mm, 작용폭 h2=550mm의 치수로 로울성형을 행하고, 로울에 대한 메탈 픽업(metal pickup)상태 및 성형품의 외관을 판정하였다. 또 이와 같이 로울 성형시험을 한후에 같은 로울에 백색도장된 아연철판 1매를 통하여 동일하게 성형하고 이 아연철판에 전사된 오염의 상태를 관찰하여 판정하였다. 또 실시예 2 및 비교예 1,2,3,4,5의 것에 대해서는 길이가 2m인 시험판을 각각 250매식 매분 50m의 속도로 송급하고 제2도에 표시한 바와 같은 단면형상의 성형품(2)에 h3=44mm, h4=19mm, h5=12mm, h6=91mm, h7=67mm, h8=12mm의 치수로 로울성형을 하고, 상기와 동일하게 각 판정을 하였다. 로울성형성에 있어서의 각 판정기준을 제1표에 표시하였다.The roll forming test was carried out at a speed of 50 m per minute while unwinding the test plate having a length of 1500 m from the coil for Example 1, and placed on the molded article 1 having a cross-sectional shape as shown in FIG. The roll molding was carried out in the dimensions of 1 = 130 mm and the working width h 2 = 550 mm, and the metal pickup state of the roll and the appearance of the molded article were determined. After the roll forming test as described above, the same molding was carried out through one sheet of zinc-coated steel plate coated on the same roll, and the resultant was observed by observing the state of contamination transferred to the zinc iron plate. In addition, for Example 2 and Comparative Examples 1, 2, 3, 4 and 5, a test plate having a length of 2 m was fed at a rate of 50 m per 250 sheets each, and the
[표 1]TABLE 1
또 내식성시험은 JIS Z 2371dp 의거하여 염수의 분무시험에 의해서 행하였다. 또 내변색(내흑변)성 시험은 0.4×60×150mm의 크기로 절단한 2매의 시험판을 5℃의 냉장고내에 1시간 유지하고, 이것을 꺼내서 결로를 생기게 한후 즉시, 2매의 시험판의 시험면을 마주 보게 합쳐서 편면비닐코오트지로 포장하고 지그(JiG)에 의해서 70kg·f/cm2의 압력이 가해지도록 세트하고 이것을 50℃, 85% RH의 습윤시험기내에 7일간 넣고, 이중에 흑변의 발생상태를 눈으로 보고 판정하였다. 내식성과 내변색(내흑변)성에 대한 판정기준을 표 2에 표시하였다.In addition, the corrosion resistance test was performed by the spray test of brine based on JISZ2371dp. In addition, the discoloration resistance test was performed by holding two test plates cut to a size of 0.4 × 60 × 150 mm in a refrigerator at 5 ° C. for 1 hour, taking them out to form condensation, and immediately after the test surfaces of the two test plates. Are packaged in one-sided vinyl coated paper, set to apply a pressure of 70kg · f / cm 2 by jig, and placed in a wet test machine at 50 ° C. and 85% RH for 7 days. The state was visually judged. Table 2 shows the criterion for corrosion resistance and discoloration resistance.
[표 2]TABLE 2
또 다이렉트 페인트성(도장성)은 시험판에 아미노알키드도료(아미락쿠 No. 1, 간사이 페인트사제)를 건조도막두께가 20㎛이고 연필경도가 2H인 도막이 형성되도록 도장한 후 바둑눈시험(cross-cut test)에 의해서 평가를 하도록 하였다. 바둑눈시험의 시험 및 평가는 도장된 시험판에 예리한 날로 소지에 달하도록 1mmrksrur으로 종횡으로 각 11개의 직교하는 선을 그어 100개의 바둑판 눈금을 만들고 그면에 점착테이프(셀로판테이프)를 압착하여 급격히 잡아 뜯은 후 잔존하는 도막의 눈수를 측정함으로서 행하였다.In addition, direct paintability (paintability) was tested on the test plate by applying an amino alkyd paint (Aramikku No. 1, manufactured by Kansai Paint Co., Ltd.) to form a dry film thickness of 20 µm and a pencil hardness of 2H. cut test). The test and evaluation of the Go eye test were made by drawing 11 orthogonal lines vertically and horizontally with 1 mmrksrur to make a sharp edge on the painted test board, making 100 checkerboard scales, and pressing the adhesive tape (cellophane tape) on the surface and tearing it off sharply. Then, the measurement was performed by measuring the number of eyes of the remaining coating film.
상기 로울성형성, 내식성, 내흑변성, 다이렉트 페인트성의 시험결과를 표 3에 표시하였다.Table 3 shows the results of the roll formation, corrosion resistance, blackening resistance, and direct paintability.
[표 3]TABLE 3
표 3의 결과 실시예 1, 2의 것은 로울성형성, 내식성, 내흑변성 및 다이렉트 페인트성의 어느 것에도 뛰어난 것이 확인되었다.As a result of Table 3, it was confirmed that the thing of Examples 1 and 2 was excellent in all of roll property formation, corrosion resistance, blackening resistance, and direct paint property.
상기와 같이 본 발명은 산가가 10 내지 200인 수분산성 또는 수용성의 수지에 이 수지의 고형분에 대하여 중량비로 1/500 내지 1/10의 6가 크롬이 배합되어 있고 pH가 3 내지 10인 수지조성물에 의해서 알루미늄-아연합금도금강판의 표면에 수지피막이 형성되도록 하고 있으므로 알루미늄-아연합금도금강판에 표면은 이 수지피막에 의해서 윤활화되고, 종래와 같이 윤활유를 사용할 필요없이 로울성형이나 프레스성형을 성형성 좋게 행할 수가 있는 것이고, 따라서 윤활유를 알루미늄-아연 합금도금강판의 표면이나 로울, 금형으로부터 제거하는 작업이 불필요하게 되는 것이다. 더욱이 6가의 크롬의 배합에 의해서 상기 수지피막에 의한 알루미늄-아연 합금도금강판의 내식성을 향상시킬 수가 있는 것이고, 또 수지의 산가의 조정에 의해서 도막과의 밀착성을 얻을 수가 있고 성형후에 도장할 경우에 있어서 수지피막을 제거할 필요없이 직접 도장을 할 수가 있는 다이렉트 페인트성을 얻을 수 있는 것이다.As described above, in the present invention, a resin composition having a pH of 3 to 10 is mixed with a water-dispersible or water-soluble resin having an acid value of 10 to 200 in a weight ratio of 1/500 to 1/10 of hexavalent chromium with respect to a solid content of the resin. Since the resin film is formed on the surface of the aluminum-zinc alloy plated steel sheet, the surface of the aluminum-zinc alloy plated steel sheet is lubricated by the resin film, and roll forming or press forming is required without using lubricant as in the prior art. It is possible to perform it well, and thus it is unnecessary to remove the lubricant from the surface, roll, or mold of the aluminum-zinc alloy plated steel sheet. Furthermore, by combining hexavalent chromium, the corrosion resistance of the aluminum-zinc alloy plated steel sheet by the resin film can be improved, and the adhesion with the coating film can be obtained by adjusting the acid value of the resin. Therefore, the direct paintability which can be directly coated without having to remove the resin film can be obtained.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019850004770A KR920002170B1 (en) | 1985-07-03 | 1985-07-03 | Clad Aluminum-Zinc Alloy Coated Steel Sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019850004770A KR920002170B1 (en) | 1985-07-03 | 1985-07-03 | Clad Aluminum-Zinc Alloy Coated Steel Sheet |
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| Publication Number | Publication Date |
|---|---|
| KR870001324A KR870001324A (en) | 1987-03-13 |
| KR920002170B1 true KR920002170B1 (en) | 1992-03-19 |
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| KR1019850004770A Expired KR920002170B1 (en) | 1985-07-03 | 1985-07-03 | Clad Aluminum-Zinc Alloy Coated Steel Sheet |
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