KR20180073017A - A coated steel plate having excellent friction property during fabricating thereof - Google Patents
A coated steel plate having excellent friction property during fabricating thereof Download PDFInfo
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Abstract
Description
본 발명은 아연도금강판의 표면처리를 통해 내식성 향상과 가공성을 증대시킴으로써 강판의 활용성을 확대할 수 있는 기술이다.The present invention is a technique that can increase the usability of a steel sheet by improving the corrosion resistance and the workability through the surface treatment of the galvanized steel sheet.
아연이라는 천연광물의 과대 사용으로 인한 자원고갈에 대한 우려로, 각국은 아연의 대체 물질 혹은 아연 사용량을 줄일 방법을 고민 중에 있다. 철강 소재에서 아연을 사용하는 이유는 철(Fe)의 부식을 막기 위해서이다. Concerns about resource depletion due to overuse of natural minerals, such as zinc, have prompted countries to consider ways to reduce zinc substitutes or zinc use. The reason why zinc is used in steel is to prevent corrosion of iron (Fe).
나아가, 최근에는 고내식성을 부여하기 위하여, 아연층 위에 표면처리를 하는 방법과 함께 합금 도금층 개발 등에 주력하고 있다. 고내식성 향상을 위해 합금 도금층을 개발하는 것은 고가의 소재를 이용하게 되고, 개발된 합금 도금층의 용접성 및 단단한 도금층 특성의 문제로 인해 특수한 작업 환경이 요구된다. Further, in recent years, in order to impart high corrosion resistance, a focus is placed on the development of an alloy plating layer together with a method of surface treatment on a zinc layer. Development of an alloy plating layer for high corrosion resistance requires expensive materials and a special working environment is required due to the weldability of the developed alloy plating layer and the characteristics of the hard plating layer.
반면에, 아연층 위에 표면처리하는 방법은 내식성과 함께 내용제성 및 다른 특성들도 보완할 수 있는 장점이 있다. 아연층 위에 표면처리 하는 방법은, 부식방지제나 나노 입자 및/또는 치밀한 수지층을 코팅함으로써, 부식인자가 도금층에 도달하는 것을 억제함으로써, 내식성을 증가시키는 것이다.On the other hand, the method of surface treatment on the zinc layer has an advantage of being able to complement the corrosion resistance and the solvent resistance and other characteristics. The method of surface treatment on the zinc layer is to increase the corrosion resistance by inhibiting the corrosion factor from reaching the plating layer by coating a corrosion inhibitor or nanoparticles and / or a dense resin layer.
한편, 아연도금강판의 고내식성을 달성함과 동시에 마찰계수를 낮추어 강판의 가공성을 높이기 위해, 내식향상제 및 수지를 포함하는 수용성 표면처리 코팅액에 왁스나 흑연 등의 윤활성분을 추가로 첨가하는 기술이 개발되었다(한국특허출원번호 제2005-0112538호). 그러나, 이러한 강판은 운반 및 유통상에서 강판이 미끄러지는 등의 문제로 인해 제품 손상 내지 인명손상을 초래하였다.On the other hand, in order to achieve high corrosion resistance of the galvanized steel sheet and to improve the workability of the steel sheet by lowering the coefficient of friction, a technique of additionally adding a lubricant component such as wax or graphite to a water-soluble surface treatment coating solution containing a corrosion- (Korean Patent Application No. 2005-0112538). However, such a steel sheet caused product damage or personal injury due to problems such as slipping of the steel sheet in transportation and distribution.
본 발명은 표면처리강판의 내식성을 유지하면서, 가공시의 가공성을 높이고, 운반 내지 유통중에 상기 문제점을 해결하기 위한 것이다.The present invention aims to improve the workability at the time of processing while maintaining the corrosion resistance of the surface-treated steel sheet, and to solve the above-mentioned problems during transportation and distribution.
본 발명은, 전압인가에 의해 코팅 상층부로 유도 가능한 윤활제 내포 캡슐을 포함하는 내식성 표면처리 코팅액을 제공하는 것이다.An object of the present invention is to provide a corrosion-resistant surface-treatment coating liquid containing a lubricant-containing capsule which can be induced to a coating upper layer by voltage application.
상기 캡슐은 통상의 고분자 수지로 구성되며, 통상적으로 사용되는 바인더 수지라면 어떠한 것을 사용하여도 무방하다. 바람직하게는, 우레탄 수지, 아크릴 수지, 에폭시 수지, 에스테르 수지 및 올레핀 수지로 이루어진 군에서 선택되는 1종 또는 2종 이상의 수지를 사용할 수 있다. 또한, 전압인가에 영향을 받는 성분, 예를 들어 금속, 카본계열 물질을 포함하여 구성되는 것이 바람직하지만, 가공시의 충격에 내부 윤활제를 누출할 수 있다면 이에 제한되지 않는다.The capsule is composed of a conventional polymer resin, and any binder resin that is conventionally used may be used. Preferably, one or more resins selected from the group consisting of a urethane resin, an acrylic resin, an epoxy resin, an ester resin and an olefin resin can be used. Further, it is preferable to include a component influenced by voltage application, for example, a metal or a carbon-based material, but it is not limited to such a configuration as long as it can leak an internal lubricant to an impact at the time of processing.
상기 윤활제는 왁스, 금속, 세라믹, 그래핀 또는 이들의 조합이 바람직한데, 가공시 마찰계수를 감소시킬 수 있다면 이에 제한되지 않는다. 또한, 전압인가에 영향을 받는 성분, 예를 들어 금속, 카본계열이 바람직하다.The lubricant is preferably a wax, a metal, a ceramic, a graphene or a combination thereof, but is not limited thereto as long as it can reduce the coefficient of friction during processing. In addition, components affected by voltage application, such as metal or carbon series, are preferable.
상기 내식성 표면처리 코팅액은 0.5 내지 2중량%의 캡슐을 포함하는 것이 바람직하다. 윤활제 내포 캡슐이 0.5중량% 미만인 경우, 가공성이 좋지 않고, 윤활제 내포 캡슐이 2 중량%를 초과하면 내식성이 불량이었다. 캡슐의 크기는 경화된 후의 코팅층 두께의 1/10~1/3 정도가 바람직하다.Preferably, the corrosion-resistant surface-treatment coating solution comprises 0.5 to 2% by weight of a capsule. When the content of the lubricant-containing capsule is less than 0.5% by weight, the workability is poor. When the content of the lubricant-containing capsule exceeds 2% by weight, the corrosion resistance is poor. The size of the capsule is preferably about 1/10 to 1/3 of the thickness of the coating layer after cured.
본 발명의 또다른 예는 상기 내식성 표면처리 코팅액으로 코팅한 후 전압을 인가하여, 윤활제 내포 캡슐을 상층부로 유도하여 제조된 강판을 제공하는 것이다. 이 경우, 인가되는 전압은 100~300V가 바람직하다. Another example of the present invention is to provide a steel sheet produced by applying the corrosion-resistant surface-treatment coating liquid and then applying a voltage to induce the lubricant-containing capsules to the upper layer. In this case, the applied voltage is preferably 100 to 300V.
본 발명은 캡슐이 첨가된 표면처리 물질을 아연도금강판에 코팅함으로써, 아연층의 부식을 막고 내식성을 향상시킬 뿐 아니라, 코팅된 강판의 안전한 운반 내지 유통을 담보할 수 있으며, 가공시에는 가해지는 충격에 의해 캡슐속의 물질이 누출되어 코팅된 강판의 마찰계수를 낮게 함으로써 가공성을 향상시킨다.The present invention is directed to coating a zinc-coated steel sheet with a capsule-added surface treatment material to prevent corrosion of the zinc layer and improve corrosion resistance, as well as to ensure safe transportation or distribution of the coated steel sheet, The material in the capsule leaks due to the impact, thereby lowering the coefficient of friction of the coated steel sheet, thereby improving workability.
도 1은 아연도금강판 위의 코팅층을 모사하여 도시한 것이다.Fig. 1 is a view showing a coating layer on a galvanized steel sheet in a simulated manner.
이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시 형태를 설명한다. 그러나, 본 발명의 실시 형태는 여러 가지 다른 형태로 변형될 수 있으며, 본 발명의 범위가 이하 설명하는 실시 형태로 한정되는 것은 아니다. Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below.
본 실시예들을 설명함에 있어서, 동일 구성에 대해서는 동일 명칭 및 부호가 사용되며, 이에 따라 중복되는 부가적인 설명은 아래에서 생락된다. 아래에서 참조되는 도면들에서는 축적비가 적용되지 않는다.In describing the embodiments, the same designations and the same names are used, and thus overlapping additional descriptions are omitted below. In the drawings referred to below, the accumulation ratio is not applied.
먼저, 본 발명의 내식성 표면처리 코팅액은 수지, 내식향상제 및 물과, 윤활제를 내포한 캡슐로 구성된다. 기타 표면처리 특성을 향상시키기 위한 성분을 추가로 포함할 수 있다.First, the corrosion-resistant surface-treated coating liquid of the present invention is composed of a capsule containing a resin, a corrosion-resistant enhancer, water, and a lubricant. Other components for improving the surface treatment property may be further included.
본 발명의 내식성 표면처리 코팅액에 사용되는 수지는 우레탄 수지, 아크릴 수지, 에폭시 수지, 에스테르 수지 및 올레핀 수지로 이루어진 군에서 선택되는 1종 또는 2종 이상의 수지를 사용할 수 있다. The resin used for the corrosion-resistant surface-treated coating liquid of the present invention may be one or more resins selected from the group consisting of urethane resin, acrylic resin, epoxy resin, ester resin and olefin resin.
본 발명의 내식성 표면처리 코팅액에는 본 발명의 사상을 벗어나지 않는 한, 통상의 내식향상제를 사용할 수 있다.In the corrosion-resistant surface-treated coating liquid of the present invention, a conventional corrosion-inhibiting agent can be used without departing from the spirit of the present invention.
본 발명의 내식성 표면처리 코팅액에 첨가되는 캡슐의 성분은 다음과 같다. 캡슐을 구성하는 수지로는 통상의 고분자 수지가 가능하며, 통상적으로 사용되는 바인더 수지라면 어떠한 것을 사용하여도 무방하다. 바람직하게는, 우레탄 수지, 아크릴 수지, 에폭시 수지, 에스테르 수지 및 올레핀 수지로 이루어진 군에서 선택되는 1종 또는 2종 이상의 수지를 사용할 수 있다. 보다 바람직하게는, 우레탄 수지를 사용할 수 있다. 상기 고분자 수지는 상기 바인더 수지 이외에도 경화제, 내식향상제 등을 더 포함할 수 있다. 상기 고분자 수지는 가공시의 충격에 내부 윤활제를 누출할 수 있다면 이에 제한되지 않는다. 또한, 전압인가에 영향을 받는 성분, 예를 들어 금속, 카본계열이 바람직하다.The components of the capsules added to the corrosion-resistant surface-coating liquid of the present invention are as follows. As the resin constituting the capsule, a usual polymer resin can be used, and any binder resin that is commonly used may be used. Preferably, one or more resins selected from the group consisting of a urethane resin, an acrylic resin, an epoxy resin, an ester resin and an olefin resin can be used. More preferably, a urethane resin can be used. In addition to the binder resin, the polymer resin may further include a curing agent, an anti-corrosion agent, and the like. The polymer resin is not limited to such a material as long as it can leak an internal lubricant to an impact during processing. In addition, components affected by voltage application, such as metal or carbon series, are preferable.
상기 캡슐 내부에 포함되는 윤활제 성분으로는 왁스, 금속, 세라믹, 카본계 물질(그래핀, 흑연 등) 또는 이들의 조합이 가능하다. 또한, 전압인가에 영향을 받는 성분, 예를 들어 금속, 카본계열이 바람직하다.As the lubricant component contained in the capsule, wax, metal, ceramic, carbon-based material (graphene, graphite, etc.) or a combination thereof is possible. In addition, components affected by voltage application, such as metal or carbon series, are preferable.
본 발명의 또다른 예는 상기 내식성 표면처리 코팅액으로 코팅한 후 전압을 인가하여, 윤활제 내포 캡슐을 상층부로 유도하여 제조된 강판을 제공하는 것이다. 이 경우, 인가되는 전압은 100~300V가 바람직하다. 인가되는 전압이 100V 미만이면, 윤활제 내포 캡슐의 코팅층 상부로의 유도가 부족하여 가공시 원하는 마찰계수 저하를 확보할 수 없고, 인가되는 전압이 300V를 초과하면 코팅층 자체가 손상되어 코팅층을 형성할 수 없다.Another example of the present invention is to provide a steel sheet produced by applying the corrosion-resistant surface-treatment coating liquid and then applying a voltage to induce the lubricant-containing capsules to the upper layer. In this case, the applied voltage is preferably 100 to 300V. If the voltage applied is less than 100V, the induced inclusion of the lubricant-containing capsules on the coating layer is insufficient so that the desired coefficient of friction can not be lowered during processing. If the applied voltage exceeds 300V, the coating layer itself may be damaged, none.
이하에서는 본 발명의 구체적인 실시예를 설명한다.Hereinafter, a specific embodiment of the present invention will be described.
먼저, 캡슐화 단계는, 분산된 CEG(CNT-Exfoliated-Graphene) 혹은 나노금속이 균일하게 흡착된 CEG 100 중량부와, 이에 대해서 부가중합될 수 있는 에틸렌기를 포함하는 한 종류 이상의 단량체 100~10,000 중량부를 투입하여 중합반응시켜서 마이크로 캡슐화하였다. 이러한 마이크로캡슐화 중합단계는 유화중합, 현탁중합 및 벌크 중합 등을 모두 사용할 수 있다. 이와 같이 제조된 캡슐은 가공시 일정 이상의 압력이 가해지면 캡슐이 용이하게 깨져서, 내포한 윤활제를 누출한다.First, in the encapsulation step, 100 parts by weight of dispersed CEG (CNT-Exfoliated-Graphene) or CEG uniformly adsorbed nanometals and 100 to 10,000 parts by weight of at least one monomer containing an ethylene group capable of addition- Followed by polymerization reaction and microencapsulation. The microcapsule polymerization step may be any of emulsion polymerization, suspension polymerization and bulk polymerization. When a pressure of more than a certain level is applied during the processing, the capsule is easily broken and leaks the contained lubricant.
아크릴수지, 내식향상제 등을 포함하는 내식성 코팅액에 상기 윤활제 내포 캡슐을 0.1, 1, 5, 10 중량% 균일하게 혼합하였다. The lubricant-containing capsules were uniformly mixed at 0.1, 1, 5, and 10 wt% in a corrosion-resistant coating solution containing an acrylic resin, a corrosion resistance improving agent, and the like.
이와 같이 제조된 내식성 표면처리 코팅액을 캐스팅, 닥터블레이드 등의 방법으로 강판에 코팅하고, 50V, 100V, 200V, 300V, 400V의 전압을 1~2초 동안 각각 인가하여, 캡슐을 유도한 후, 온도 180도에서 건조시켰다.The corrosion-resistant surface-treated coating solution thus prepared was coated on a steel sheet by casting, doctor blade, etc., and a voltage of 50 V, 100 V, 200 V, 300 V and 400 V was applied for 1 to 2 seconds, And dried at 180 degrees.
상기 코팅된 강판을 컵드로잉(Cup Drawing) 시험으로 가공성을 검증하고, 연속염수분무 시험으로 내식성을 검증하였다.The coated steel sheet was subjected to a cup drawing test to verify its workability and a corrosion test was conducted by a continuous salt spray test.
윤활제 내포 캡슐을 1중량% 첨가하였을 때, 가장 우수한 가공성을 나타내고, 내식성에서도 무난한 결과를 나타내었다. 윤활제 내포 캡슐이 0.5중량% 미만인 경우, 가공성이 좋지 않고, 윤활제 내포 캡슐이 2 중량%를 초과하면 내식성이 불량이었다.When 1% by weight of the lubricant-containing capsules was added, the best processability was obtained and the corrosion resistance was also good. When the content of the lubricant-containing capsule is less than 0.5% by weight, the workability is poor. When the content of the lubricant-containing capsule exceeds 2% by weight, the corrosion resistance is poor.
나아가, 아래 표 1에 나타낸 바와 같이, 윤활제 내포 캡슐을 1 중량% 첨가한 코팅액을 200V로 전압을 인가하여 제조된 경우에 가공성 및 내식성이 가장 우수하였다. 실험 결과를 아래 표 1에 나타내었다.Further, as shown in Table 1 below, when the coating solution containing 1% by weight of the lubricant-containing capsules was applied at a voltage of 200 V, workability and corrosion resistance were most excellent. The experimental results are shown in Table 1 below.
(컵드로잉 증가율)Processability evaluation
(Cup drawing increase rate)
이상에서 본 발명의 실시예에 대하여 상세하게 설명하였지만 본 발명의 권리범위는 이에 한정되는 것은 아니고, 청구범위에 기재된 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 다양한 수정 및 변형이 가능하다는 것은 당 기술분야의 통상의 지식을 가진 자에게는 자명할 것이다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be obvious to those of ordinary skill in the art.
Claims (10)
And a lubricant-containing capsule capable of being induced to a coating upper layer by a voltage application.
The corrosion-resistant surface-treated coating liquid according to claim 1, wherein the capsule is composed of one or more resins selected from the group consisting of urethane resin, acrylic resin, epoxy resin, ester resin and olefin resin.
3. The corrosion-resistant surface-treated coating liquid according to claim 2, wherein the resin constituting the capsule further comprises a component which is influenced by voltage application.
The corrosion resistant surface treatment coating solution according to claim 1, wherein the lubricant is wax, metal, ceramic, graphene, graphite or a combination thereof.
The corrosion-resistant surface-treated coating liquid according to claim 1, wherein the lubricant comprises a component which is influenced by a voltage application.
The corrosion-resistant surface-treated coating liquid according to claim 1, wherein the lubricant is CEG (CNT-Exfoliated-Graphene) or CEG in which nanometals are uniformly adsorbed.
The corrosion-resistant surface-treated coating liquid according to claim 1, wherein the capsule in the coating liquid is 0.5 to 2% by weight.
The corrosion-resistant surface-treated coating liquid according to claim 1, wherein the size of the capsule is 1/10 to 1/3 of the thickness of the coating layer after curing.
8. A surface-coated coated steel sheet produced by coating with a corrosion-resistant surface-treated coating liquid according to any one of claims 1 to 8, and then applying a voltage to induce the lubricant-containing capsules to the upper layer.
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