KR940000278B1 - Method for producing two-layer plating steel sheet of zn and zn-mg alloy with excellent adhesion corrosion resistance - Google Patents
Method for producing two-layer plating steel sheet of zn and zn-mg alloy with excellent adhesion corrosion resistance Download PDFInfo
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- KR940000278B1 KR940000278B1 KR1019910019786A KR910019786A KR940000278B1 KR 940000278 B1 KR940000278 B1 KR 940000278B1 KR 1019910019786 A KR1019910019786 A KR 1019910019786A KR 910019786 A KR910019786 A KR 910019786A KR 940000278 B1 KR940000278 B1 KR 940000278B1
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/56—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
- C23C14/26—Vacuum evaporation by resistance or inductive heating of the source
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Abstract
내용 없음.No content.
Description
제1도는 전기도금강판을 소지기판으로 사용한 종래의 아연 및 아연-마그네슘합금의 이층도금강판의 단면 개략도.1 is a schematic cross-sectional view of a conventional double-coated steel sheet of zinc and zinc-magnesium alloy using an electroplated steel sheet as a base plate.
제2도는 본 발명을 구현하기 위한 진공증착 장치의 개략도.2 is a schematic diagram of a vacuum deposition apparatus for implementing the present invention.
제3도는 본 발명에 부합되는 아연 및 아연-마그네슘합금의 이층 도금강판의 단면개략도.3 is a schematic cross-sectional view of a two-layer plated steel sheet of zinc and zinc-magnesium alloy in accordance with the present invention.
* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings
1 : 진공용기 2a, 2b : 증발원1: vacuum container 2a, 2b: evaporation source
3 : 기판 4 : 기판홀더3: substrate 4: substrate holder
5 : 아르곤가스 유입구 6 : 기판가열장치5: Argon gas inlet 6: Substrate heating device
7a, 7b : 셔터7a, 7b: shutter
본 발명은 자동차, 가전제품 및 건재용 구조재로 사용되는 아연 및 아연-마그네슘합금의 이층 도금강판 및 그 제조방법에 관한 것으로서, 보다 상세하게는, 진공증착법에 의해 제조되는 밀착성 및 내식성이 우수한 아연 및 아연-마그네슘 합금의 이층도금강판 및 그 제조방법에 관한 것이다.The present invention relates to a two-layer plated steel sheet of zinc and zinc-magnesium alloy used as a structural material for automobiles, home appliances and building materials, and a method of manufacturing the same, and more particularly, zinc and excellent adhesion and corrosion resistance produced by vacuum deposition. It relates to a two-layer plated steel sheet of zinc-magnesium alloy and a method of manufacturing the same.
철강의 부식을 방지하는 대표적인 도금강판으로 아연도금 강판이 있는데, 이 도금강판은 아연의 희생방식 작용을 이용하여 내식성을 유지하지만 반드시 충분하다고 할 수 없다.Galvanized steel is a representative plated steel sheet that prevents corrosion of the steel, which maintains the corrosion resistance by using the sacrificial anticorrosive action of zinc, but is not necessarily sufficient.
예로서, 아연 부착량이 40g/㎡인 전기도금강판은 5% 염수분무시험을 약 40시간 실시하면 적청이 발생한다.For example, an electroplated steel sheet with a zinc adhesion of 40 g / m 2 may have a red blue color after a 40% 5% salt spray test.
이러한 이유로 아연도금강판의 내식성 향상을 위해 각종 아연합금도금강판과 이층 도금강판등이 제안 또는 개발되어 왔다. 그러나, 기존의 용융 도금법과 전기 도금법으로는 새로운 도금계를 개발, 적용하는데 한계가 있으므로 최근에는 진공 증착법이 새로운 도금방법으로 대두되어 몇가지 물질계가 개발되어 있으며, 아연-마그네슘 합금도금 강판도 그 중의 하나로 이는 박도금으로도 고 내식성을 확보할 수 있어서 각광을 받고 있다.For this reason, various zinc alloy plated steel sheets and two-layer plated steel sheets have been proposed or developed for improving the corrosion resistance of galvanized steel sheets. However, the existing hot-dip galvanizing method and the electroplating method have a limitation in developing and applying a new plating system. Recently, the vacuum deposition method has emerged as a new plating method, and several material systems have been developed. Zinc-magnesium alloy plated steel sheet is one of them. It is attracting attention because it can secure high corrosion resistance even with thin plating.
그러나, 기 개발된 아연-마그네슘 합금도금 가판의 경우 밀착성이 열악하여 박리가 일어나 가공을 하여 사용하는 제품의 경우는 많은 문제점을 내포하고 있었다.However, in the case of the previously developed zinc-magnesium alloy plate plate, the adhesiveness is poor, so that peeling occurs and the product used for processing has many problems.
이러한 문제점을 해결하기 위하여 제1도에 나타난 바와 같이 2-2-g/㎡정도의 두께로 아연 전기도금한 강판을 소지기판으로 사용하는 진공 증착방법이 최근 제안되었다.In order to solve this problem, as shown in FIG. 1, a vacuum deposition method using a zinc electroplated steel sheet having a thickness of about 2-2-g / m 2 as a substrate is recently proposed.
그러나, 이 방법은 기존에 생산되지 않은 아연전기도금 강판을 생산해야 할 뿐만 아니라 도금된 강판을 진공증착법으로 다시 도금할때까지 잘 보관해야 하는등의 문제점이 있다.However, this method has a problem of not only producing a galvanized steel sheet which has not been produced before, but also storing the plated steel sheet well until vacuum plating is performed again.
따라서, 본 발명은 아연과 마그네슘을 동시 증발시키면서 아연측 증발원의 셔터를 먼저 열어 박도금층으로 아연을 진공증착한 다음 나그네슘 측 증발원의 셔터를 열어 상기 아연증착층위에 아연-마그네슘 합금도금층을 증착시키므로써, 내식성 및 밀착성이 우수하고, 도장성이 양호할 뿐만 아니라 전기 아연 도금강판을 사용하지 않고 통상의 강판을 그대로 소지기판으로 사용하는 아연 및 아연-마그네슘 합금의 이층도금강판 및 그 제조방법을 제공하고자 하는데 그 목적이 있다.Therefore, in the present invention, the zinc-magnesium alloy plating layer is deposited on the zinc-deposited layer by vacuum evaporation of zinc into the thin plating layer by first opening the shutter of the zinc-side evaporation source while simultaneously evaporating zinc and magnesium. In addition, it provides excellent corrosion resistance and adhesion, good paintability, and provides a two-layer plated steel sheet of zinc and zinc-magnesium alloy using a conventional steel sheet as a base plate without using an electrogalvanized steel sheet and a method of manufacturing the same. There is a purpose.
이하, 본 발명을 설명한다.Hereinafter, the present invention will be described.
본 발명은 진공증착법에 의해 이층 도금강판을 제조하는 방법에 있어서, 진공용기내에 아연과 마그네슘을 증발시키기 위한 각각의 증발원을 설치하고 증발원위에 기판을 장착하는 단계 ; 상기와 같이 증발원 및 기판을 장착한 다음, 진공용기내의 진공도가 10-5Torr 이하가 되도록 배기하는 단계 ; 진공용기내에 아르곤 가스를 유입하여 1×10-2-1×10-1Torr 정도의 아르곤 가스분위기를 유지한 다음, 기판에 500-1000V의 부(負)전압을 인가하여 방전에 의한 기판 청정을 행하는 단계 ; 상기와 같이 기판청정 단계가 완료되면 기판의 온도가 상온~250℃가 되도록 기판의 온도를 조절하는 단계 ; 상기 기판의 온도조절단계가 완료된 후, 각각의 증발원에 전원을 공급하여 탈가스 시킨 다음, 아연측 증발원의 셔터를 열어 아연의 부착량이 1-10g/㎡이 되도록 아연을 진공증착하는 단계 ; 마그네슘측의 증발원 셔터를 열어 4-30%의 마그네슘과 70-96%의 아연으로 이루어진 아연-마그네슘 합금층을, 도금층의 총부착량이 20-40g/㎡이 되도록, 상기 아연진공증착층위에 증착시키는 단계를 포함하는 밀착성 및 내식성이 우수한 아연 및 아연-마그네슘 합금의 이층도금 강판의 제조방법에 관한 것이다.The present invention provides a method for producing a two-layer plated steel sheet by vacuum deposition, comprising the steps of: installing a respective evaporation source for evaporating zinc and magnesium in a vacuum vessel and mounting a substrate on the evaporation source; Mounting the evaporation source and the substrate as described above, and then evacuating the vacuum in the vacuum vessel to 10 -5 Torr or less; Argon gas was introduced into the vacuum chamber to maintain an argon gas atmosphere of about 1 × 10 -2 -1 × 10 -1 Torr, and a negative voltage of 500-1000 V was applied to the substrate to clean the substrate by discharge. Performing step; Adjusting the temperature of the substrate so that the temperature of the substrate is room temperature to 250 ° C. when the substrate cleaning step is completed as described above; After the temperature control step of the substrate is completed, supplying power to each evaporation source to degas and then vacuum depositing zinc so that the deposition amount of zinc is 1-10 g / m 2 by opening the shutter of the zinc-side evaporation source; An evaporation source shutter on the magnesium side was opened to deposit a zinc-magnesium alloy layer composed of 4-30% magnesium and 70-96% zinc on the zinc vacuum deposition layer so that the total deposition amount of the plating layer was 20-40 g / m 2. It relates to a method for producing a two-layer plated steel sheet of zinc and zinc-magnesium alloy excellent in adhesion and corrosion resistance comprising the step.
또한, 본 발명은 상기한 진공증착법에 의해 제조된 것으로서, 하층이 1-10g/㎡의 부착량을 갖는 아연진공층착층이고, 상층이 70-96%의 아연 및 4-30%의 마그네슘으로 이루어진 아연-마그네슘 합금 진공증착층이고, 그리고 도금층의 총 부착량이 20-40g/㎡인 밀착성 및 내식성이 우수한 아연 및 아연-마그네슘합금의 이층 도금강판에 관한 것이다.In addition, the present invention is produced by the above vacuum deposition method, the lower layer is a zinc vacuum layer deposition layer having an adhesion amount of 1-10g / ㎡, the upper layer is zinc consisting of 70-96% zinc and 4-30% magnesium -Magnesium alloy vacuum evaporation layer, and the total adhesion amount of plating layer is 20-40 g / m <2>, It is related with the two-layered steel plate of zinc and zinc-magnesium alloy excellent in adhesiveness and corrosion resistance.
이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.
본 발명은, 제2도에 나타난 바와 같이, 진공용기(1)내의 아연과 마그네슘과 측증발원(2a)(2b)에 아연과 마그네슘을 각각 넣은 다음, 기판(3)을 기판홀더(4)에 장착하고 진공펌프(도시되어 있지 않음)을 이용하여 원하는 진공이 될때까지 배기한다.In the present invention, as shown in FIG. 2, zinc and magnesium in the vacuum vessel 1 and zinc and magnesium in the side evaporation source 2a and 2b, respectively, and then the substrate 3 is placed in the substrate holder 4. Install and evacuate to the desired vacuum using a vacuum pump (not shown).
상기 아연과 마그네슘은 낟알형상이 바람직하다.The zinc and magnesium are preferably in the form of grains.
이때의 진공도는 10-5Torr 이하가 되는 것이 바람직하다.The degree of vacuum is preferably not more than 10 -5 Torr.
이때 증발원(2a)(2b) 사이의 간격과 증발원(2a)(2b)과 기판(3)사이의 거리등을 기판(3)의 크기에 맞추어 미리 설정하되, 코팅층 두께의 편차 및 마그네슘 함량의 편차가 5% 이내가 되도록 조정한다.At this time, the distance between the evaporation sources 2a and 2b and the distance between the evaporation sources 2a and 2b and the substrate 3 are set in advance according to the size of the substrate 3, but the variation in the thickness of the coating layer and the variation in the magnesium content. Adjust so that is within 5%.
상기 기판(3)은 진공용기(1)에 장입하기 전 알칼리 탈지의 유지용매를 이용한 초음파 세척을 행하는 것이 바람직하다.It is preferable that the substrate 3 is subjected to ultrasonic cleaning using an alkaline solvent for degreasing before being charged into the vacuum container 1.
다음에, 진공도가 10-5Torr 이하가 되면, 아르곤 가스 유입구(5)를 통해 진공용기(1)내에 아르곤 가스를 유입하여 1×10-2-1×10-1Torr 정도의 아르곤 가스 분위기로 유지한 후, 기판(3)에 500-1000V의 부전압을 인가하여 반전에 의해 기판(3)의 청정과 활성도를 높인다.Next, when the vacuum degree is 10 −5 Torr or less, argon gas is introduced into the vacuum vessel 1 through the argon gas inlet 5 to an argon gas atmosphere of about 1 × 10 −2 -1 × 10 −1 Torr. After holding, a negative voltage of 500-1000 V is applied to the substrate 3 to increase the cleanliness and activity of the substrate 3 by inversion.
이때, 진공도를 10-5Torr 이하로 하는 이유는 불순물을 충분히 배출시킴으로써, 글로우 방전 청정시 불순물의 유입이 없도록 하기 위함이며, 아르곤 가스를 1×10-2-1×10-1Torr로 유지하는 이유는 이 정도의 가스 분위기가 되어야 글로우 방전이 일어나 글로우 방전 청정을 보다 효과적으로 수행할 수 있기 때문이다.At this time, the reason for the vacuum degree to be 10 -5 Torr or less is to discharge impurities sufficiently so that no impurities are introduced during the cleaning of the glow discharge, and the argon gas is maintained at 1 × 10 -2 -1 × 10 -1 Torr. This is because the glow discharge only occurs in this gas atmosphere, so that the glow discharge cleaning can be performed more effectively.
또한, 기판(3)에 500-1000V의 부전압을 인가하는 이유는 목적하는 시간에 충분한 청정효과를 얻기 위함이며, 전압이 낮으면 시간이 오래걸리고, 너무 높으면 이상 방전이 생겨 기판(3)을 손상시킬 우려가 있기 때문이며, 부전압을 인가하여야 청정효과가 나타난다.In addition, the reason why the negative voltage of 500-1000 V is applied to the substrate 3 is to obtain a sufficient clean effect at the desired time. When the voltage is low, it takes a long time, and when the voltage is too high, abnormal discharge occurs and the substrate 3 is removed. This is because there is a risk of damage, and the negative effect is applied to the clean effect.
기판(3)의 청정 정도는 기판(3)에 흐르는 전류는 읽어 간접적으로 판단한다.The degree of cleanliness of the substrate 3 is indirectly determined by reading the current flowing through the substrate 3.
초기에는 불순물 또는 산화막등의 영향으로 많은 전류가 흐르다가 어느 정도 깨끗해지면, 전류가 감소하여 포화되는 단계에 접어들게 되는데 이때 청정작업을 끝내는 것이 바람직하다.Initially, when a large amount of current flows due to an impurity or an oxide film and becomes clean to some extent, the current decreases and enters a saturation stage.
기판 청정이 끝나면 기판가열장치(6)에 의해 기판(3)의 온도를 상온~250℃로 맞추고 각각의 증발원(2a)(2b)에 적당량의 전원을 공급하여 증발원(2a)(2b)을 탈가스 시킨다.After the substrate is cleaned, the substrate heating apparatus 6 adjusts the temperature of the substrate 3 to room temperature to 250 ° C, and supplies an appropriate amount of power to each of the evaporation sources 2a and 2b to remove the evaporation sources 2a and 2b. Let gas.
상기 기판(3)의 온도가 250℃이상이 되면 증착되었던 물질이 다시 증발되어 증착률이 현저히 저하되므로 기판(3)의 온도를 250℃이하로 한정하는 것이 바람직하다.When the temperature of the substrate 3 is greater than or equal to 250 ° C., the deposited material evaporates again and the deposition rate is significantly lowered. Therefore, it is preferable to limit the temperature of the substrate 3 to 250 ° C. or less.
탈가스가 끝나면 처음에 아연측 증발원(2a)의 셔터(7a)를 열어 목적하는 두께(부착량)의 아연을 증착시킨 다음 마그네슘측 증발원(2b)의 셔터(7b)를 열어 목적하는 조성의 아연-마그네슘합금 피막을 형성한다.After degassing, the shutter 7a of the zinc-side evaporation source 2a is first opened to deposit zinc of a desired thickness (adhesion amount), and then the shutter 7b of the magnesium-side evaporation source 2b is opened to form zinc- of the desired composition. A magnesium alloy film is formed.
상기에서, 아연 진공 증착층의 부착량은 1-10g/㎡이 바람직한데, 그 이유는 1g/㎡이하가 되면 밀착성이 저하되고, 10g/㎠이상이 되면 경제성이 떨어지기 때문이다.In the above description, the deposition amount of the zinc vacuum deposition layer is preferably 1-10 g / m 2 because the adhesion is lowered when it is 1 g / m 2 or less, and when it is 10 g / cm 2 or more, the economic efficiency is inferior.
또한, 아연-마그네슘 합금피막은 70-96%의 아연과 4-30%의 마그네슘으로 이루어지는 것이 바람직한데, 그 이유는 이 범위에서 우수한 내식성을 나타내기 때문이다.In addition, the zinc-magnesium alloy coating is preferably made of 70-96% zinc and 4-30% magnesium because it shows excellent corrosion resistance in this range.
또한, 도금층의 총 두께는 20-40g/㎡으로 하는 것이 바람직한데, 그 이유는 20g/㎡이하가 되면, 내식성이 저하되고, 40g/㎡이상이 되면 경제성이 떨어지기 때문이다.Further, the total thickness of the plating layer is preferably 20-40 g / m 2 because the corrosion resistance is lowered at 20 g / m 2 or less, and the economical efficiency is lowered at 40 g / m 2 or more.
상기와 같이 제조된 아연 및 아연-마그네슘합금의 이층도금강판은, 제3도에 나타난 바와 같이, 소지강판 및 위에 아연진공증착 도금층이 형성되고 그 위에는 아연-마그네슘 합금층이 형성된다.In the two-layer plated steel sheet of zinc and zinc-magnesium alloy prepared as described above, a zinc vacuum deposition plating layer is formed on the base steel sheet and the zinc-magnesium alloy layer thereon, as shown in FIG.
이하, 실시예를 통하여 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.
[실시예]EXAMPLE
[발명예 1~5]Invention Examples 1 to 5
아연 및 마그네슘 증발을 위애 각각 덮개가 있는 Ta 보우트를 증발원으로 사용하고, 기판으로는 0.6×100×150mm의 저탄소강판을 사용하였다.Covered Ta boats were used as evaporation sources for zinc and magnesium evaporation, and a low carbon steel plate of 0.6 × 100 × 150 mm was used as the substrate.
상기 기판 및 각각의 증발원을 진공용기내에 위치시킨 다음 배기하여 진공도가 5×10-5Torr가 되도록 하였다.The substrate and each evaporation source were placed in a vacuum vessel and then evacuated to give a vacuum of 5 × 10 −5 Torr.
다음에, 10-2Torr의 정도의 아르곤가스 분위기에서 기판에 1000V의 부전압을 인가하여 15분정도 글로우 방전에 의한 기판청정을 행하였다.Subsequently, the substrate was cleaned by glow discharge for about 15 minutes by applying a negative voltage of 1000 V to the substrate in an argon gas atmosphere of about 10 −2 Torr.
다음에, 기판온도가 150℃가 되도록 조절하였다.Next, the substrate temperature was adjusted to be 150 ° C.
다음에, 각각의 증발원에 전원을 공급하여 탈가스 시킨 후, 아연측 증발원의 셔터를 열어 상기 기판상에 아연을 하기 표 1과 같은 부착량으로 증착하였다.Next, after degassing by supplying power to each evaporation source, a zinc-evaporation source was opened, and zinc was deposited on the substrate in an adhesion amount as shown in Table 1 below.
다음에, 하기 표 1과 조성비를 갖는 아연-마그네슘 합금을 상기 아연증착층위에 증착시켜 아연과 아연-마그네슘 합금의 이층도금강판을 제조하였다.Next, a zinc-magnesium alloy having the composition ratio shown in Table 1 below was deposited on the zinc deposition layer to prepare a two-layer plated steel sheet of zinc and zinc-magnesium alloy.
[비교예 1]Comparative Example 1
아연 및 마그네슘을 증발시키기 위해 각각 덮개가 있는 Ta 보우트를 증발원으로 사용하고, 기판으로는 0.6×100×150mm의 저탄소강판을 사용하였다.In order to evaporate zinc and magnesium, a covered Ta boat was used as an evaporation source, and a low carbon steel plate of 0.6 × 100 × 150 mm was used as a substrate.
기판의 온도는 150℃이고, 증발도중의 진공도가 5×10-5Torr에서 92%의 아연과 8%의 마그네슘으로 이루어진 아연-마그네슘 합금만을 상기 기판상에 20g/㎡의 부착량이 되도록 증착하였다.The temperature of the substrate was 150 ° C., and the degree of vacuum during evaporation was deposited at 5 × 10 −5 Torr, so that only a zinc-magnesium alloy composed of 92% zinc and 8% magnesium was deposited on the substrate so as to have an adhesion amount of 20 g / m 2.
[비교예 2]Comparative Example 2
비교예 1과 동일한 방법으로 증착하되 다만, 아연-마그네슘 합금층의 마그네슘의 함량이 11.5%가 되도록 하였다.The deposition was performed in the same manner as in Comparative Example 1 except that the magnesium content of the zinc-magnesium alloy layer was 11.5%.
[비교예 3]Comparative Example 3
아연을 증발시키기 위해 덮개가 있는 Ta 보우트를 증발원으로 사용하고, 기판으로는 0.6×100×150mm의 저탄소강판을 사용하였다.In order to evaporate zinc, a covered Ta boat was used as the evaporation source, and a low carbon steel plate of 0.6 × 100 × 150 mm was used as the substrate.
기판의 온도는 150℃이고, 증발도중의 진공도가 5×10-5Torr에서 아연만을 20g/㎡을 증착하였다.The temperature of the substrate was 150 ° C., and only 20 g / m 2 of zinc was deposited at a vacuum of 5 × 10 −5 Torr during evaporation.
[비교예 4][Comparative Example 4]
마그네슘을 증발시키기 위해 덮개가 있는 Ta 보우트를 증발원으로 사용하고, 기판으로는 0.6×100×150(mm)의 저탄소강판을 사용하였다.In order to evaporate magnesium, a covered Ta boat was used as the evaporation source, and a low carbon steel sheet of 0.6 x 100 x 150 (mm) was used as the substrate.
기판의 온도는 150℃이고, 증발도중의 진공도가 5×10-5Torr인 진공하에서 마그네슘 증발원의 셔터를 열어 마그네슘만을 20g/㎡의 부착량으로 상기 기판상에 증착하였다.The temperature of the substrate was 150 ° C., and the magnesium evaporation source was opened under a vacuum in which the degree of vacuum during evaporation was 5 × 10 −5 Torr, and only magnesium was deposited on the substrate with an adhesion amount of 20 g / m 2.
[비교예 5][Comparative Example 5]
전기도금법으로 0.6×100×150(mm)의 강판상에 Zn-13% Ni을 30g/㎡의 부착량으로 피복하여 전기도금 강판을 제조하였다.An electroplating steel sheet was prepared by coating Zn-13% Ni with an adhesion amount of 30 g / m 2 on a steel plate of 0.6 × 100 × 150 (mm) by the electroplating method.
상기 발명예(1-5) 및 비교예(1-5)에 따라 제조된 도금강판에 대하여 나내식성 및 밀착성 시험을 행하고, 그 결과를 하기 표 1에 나타내었다.The corrosion resistance and adhesion tests were performed on the plated steel sheets prepared according to Inventive Example (1-5) and Comparative Example (1-5), and the results are shown in Table 1 below.
여기서, 나 내식성은 5% NaCl 용액중에서의 초기 적청 발생시간으로 평가하였으며, 밀착성은 180 Ot 굴곡을 1회 행한 후 테이프에 의한 박리시험을 실시하여 평가하였다.Here, the corrosion resistance was evaluated by the initial red blue development time in the 5% NaCl solution, the adhesion was evaluated by performing a peel test by tape after 180 Ot bending once.
[표 1]TABLE 1
* ○ : 박리가 일어나지 않음* ○: No peeling off
× : 박리됨×: Peeled off
상기 표 1에 나타난 바와 같이, 본 발명예(1-5)가 비교예(1-5)에 비하여 나 내식성 및 밀착성이 우수한 것임을 알 수 있다.As shown in Table 1, it can be seen that Example (1-5) of the present invention is excellent in corrosion resistance and adhesion compared to Comparative Example (1-5).
상술한 바와 같이, 본 발명은 종래의 도금강판 보다 훨씬 우수한 나내식성 및 밀착성을 갖는 아연 및 아연-마그네슘 합금의 이층도금강판을 제공하므로서, 자동차, 가전제품 및 건재등에 있어서 고 내식성이 요구되는 제품에 보다 적절하게 사용될 수 있는 효과가 있는 것이다.As described above, the present invention provides a two-layer plated steel sheet of zinc and zinc-magnesium alloy having much better corrosion resistance and adhesion than the conventional plated steel sheet, and thus, for products requiring high corrosion resistance in automobiles, home appliances and building materials. There is an effect that can be used more appropriately.
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| KR1019910019786A KR940000278B1 (en) | 1991-11-07 | 1991-11-07 | Method for producing two-layer plating steel sheet of zn and zn-mg alloy with excellent adhesion corrosion resistance |
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| KR1019910019786A KR940000278B1 (en) | 1991-11-07 | 1991-11-07 | Method for producing two-layer plating steel sheet of zn and zn-mg alloy with excellent adhesion corrosion resistance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100285333A1 (en) * | 2007-12-28 | 2010-11-11 | Posco | Zinc alloy coated steel sheet having good sealer adhesion and corrosion resistance and process of manufacturing the same |
| WO2014104445A1 (en) * | 2012-12-26 | 2014-07-03 | 주식회사 포스코 | Zn-mg alloy plated steel sheet, and method for manufacturing same |
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| KR102109242B1 (en) | 2017-12-26 | 2020-05-11 | 주식회사 포스코 | Multi-layered zinc alloy plated steel material having excellent spot weldability and corrosion resistance |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100285333A1 (en) * | 2007-12-28 | 2010-11-11 | Posco | Zinc alloy coated steel sheet having good sealer adhesion and corrosion resistance and process of manufacturing the same |
| US9382630B2 (en) * | 2007-12-28 | 2016-07-05 | Posco | Zinc alloy coated steel sheet having good sealer adhesion and corrosion resistance and process of manufacturing the same |
| WO2014104445A1 (en) * | 2012-12-26 | 2014-07-03 | 주식회사 포스코 | Zn-mg alloy plated steel sheet, and method for manufacturing same |
| KR101439694B1 (en) * | 2012-12-26 | 2014-09-12 | 주식회사 포스코 | Zn-Mg ALLOY COATED STEEL SHEET AND MEHTDOD FOR MANUFACTURING THE SAME |
| CN104903493A (en) * | 2012-12-26 | 2015-09-09 | Posco公司 | ZN-MG alloy plated steel sheet, and method for manufacturing same |
| EP2940191A4 (en) * | 2012-12-26 | 2015-11-04 | Posco | ZN-MG ALLOY PLATED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME |
| JP2017145508A (en) * | 2012-12-26 | 2017-08-24 | ポスコＰｏｓｃｏ | Zn-Mg ALLOY PLATED STEEL SHEET AND PRODUCTION METHOD THEREOF |
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