Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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An Electrochemical Evaluation on the Corrosion Property of Metallizing Film

용사 도막의 내식성에 관한 전기화학적 평가

  • 신중하 (한국화학시험연구원) ;
  • 문경만 (한국해양대학교 조선기자재공학부)
  • Received : 2010.11.02
  • Accepted : 2010.12.29
  • Published : 2010.12.01
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Abstract

Many surface protection methods have been developed to apply for constructional steels used under severe corrosive environment. Thermal spray coating has been known to be an attractive technique due to its relatively high coating speed. Furthermore high corrosion resistance of coated film with thermal spray is required to expand its application. Four types of coated films(DFT:300 um) such as pure zinc, pure aluminum and two Al-Zn alloy (Al:Zn=85:15 and Al:Zn=95:5) onto the carbon steel (SS401) were prepared with arc spray, and the corrosion behavior of their samples were evaluated by electrochemical method in this study. Pure aluminum sample showed high corrosion resistance behavior exposed to sea water solution and pure zinc and alloy (Al:Zn=95:5) samples followed pure aluminum sample. The other alloy(Al:Zn=85:15) so called galvalume coated onto the carbon steel ranks the 4th corrosion resistance in this study. The results of porosity ratio of those samples by observation are well matched with the electrochemical data.

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References

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