Corrosion Science and Technology

  • 제10권4호
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  • Pages.125-130
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  • 2011
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  • 1598-6462(pISSN)
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  • 2288-6524(eISSN)
한국부식방식학회 (The Corrosion Science Society of Korea)
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전기화학적 부동태화에 의한 동관의 내식성 개선 연구

Improvement of Corrosion Resistance for Copper Tube by Electrochemical Passivation

  • 민성기 (인하대학교 신소재공학부) ;
  • 김경태 (인하대학교 신소재공학부) ;
  • 황운석 (인하대학교 신소재공학부)
  • Min, Sung-Ki (School of Materials Science and Engineering, Inha University) ;
  • Kim, Kyung-Tae (School of Materials Science and Engineering, Inha University) ;
  • Hwang, Woon-Suk (School of Materials Science and Engineering, Inha University)
  • 투고 : 2011.07.26
  • 심사 : 2011.08.26
  • 발행 : 2011.08.01
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초록

This study was performed to improve the corrosion resistance and the stability of passive film on copper tube by potentiostatic polarization method in synthetic tap water. Formation of passive film was carried out by anodic potentiostatic polarization at various passivation potentials and passivation times in 0.1 M NaOH solution. Stability of passive film and corrosion resistance was evaluated by self-activation time, ${\tau}_0$ from passive state to active state on open-circuit state in 0.1 M NaOH solution. Addition of polyphosphate in NaOH solution prolonged the self-activation time and improved the corrosion resistance, and the addition of 5 ppm polyphosphate was most effective. It was also observed that better corrosion resistance was obtained by potentiostatic polarization at 1.0 V (vs. SCE) than at any other passivation potentials. Passivated copper tube showed perfect corrosion resistance for the immersion test in synthetic tap water showing that the anodic potentiostatic polarization treatment in 0.1 M NaOH with 5 ppm polyphosphate solution would be effective in improving the corrosion resistance and preventing the blue water problem.

키워드

참고문헌

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피인용 문헌

  1. Non-amine계 부식방지제를 포함하는 자동차용 부동액의 구리 부식성 평가 vol.21, pp.2, 2011, https://doi.org/10.5762/kais.2020.21.2.619