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Performance Evaluation of Antioxidizing Device for Protection of Car Body

자동차 차체 보호를 위한 산화방지 장치의 성능 평가

  • Kim, Hae Sik (Department of Chemistry, College of Natural Sciences, Kyungpook National University) ;
  • Yun, Yeong Jin (Department of Chemistry, College of Natural Sciences, Kyungpook National University) ;
  • Ji, Jong Gi (Department of Chemistry, College of Natural Sciences, Kyungpook National University)
  • 김해식 (경북대학교 자연과학대학 화학과) ;
  • 윤영진 (경북대학교 자연과학대학 화학과) ;
  • 지종기 (경북대학교 자연과학대학 화학과)
  • Published : 2002.10.20

Abstract

To protect the occurrence of the oxidation of car body, we developed antioxidizing device made with sacrificial anode. Because car body is made of iron and iron-alloy and oxidation potential of Mg, Al and Zn is higher than that of iron, sacrificial anodes were made with Mg, Al and Zn. Accordingly, Mg, Al and Zn are better oxidizing than car body, iron and iron-alloy can be protected from oxidizing. We have made an antioxidizing device and evaluated their anti-corrosive effect for iron piece in the solution of hydrochloric, nitric and sulfuric acid using balance, SEM and XPS. When iron pieces were connected with antioxidizing device of car body, weight loss by oxidation was remarkably reduced and surface corrosion of iron piece was protected. It was shown that the surface of iron pieces which is not con-nected to the device was changed to iron(Ⅲ) oxide, Fe$_2$O$_3$. Therefore, if this device is attached to car body, corrosion and oxidation of car body will be reduced, considerably.

차체의 산화를 방지하기 위하여 희생적 양극을 사용한 산화방지 장치를 개발하였다. 희생적 양극은 철보다 산화 전위가 높은 Mg, Al, Zn으로 만들어 졌고 이것은 차체의 철이나 철합금보다 먼저 산화되어 차체의 부식을 방지한다. 차체 산화방지 장치를 제작하여 철시편을 염산, 질산 및 황산에 대한 방식효과를 시간에 따라 측정하였고 SEM과 XPS를 이용하여 철시편 표면의 방식효과를 분석하였다. 철시편을 산화 방지 장치에 연결하면 산화되어 산성용액 속으로 녹아 들어가는 철의 양이 현저하게 감소하고 철시편 표면의 산화가 방지되며 산화된 철은 $Fe_2O_3$의 산화형태를 가짐을 확인하였다. 따라서 차체 산화방지를 차체에 직접 부착한다면 차체의 부식 및 산화를 효과적으로 방지할 것으로 기대된다.

Keywords

References

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