DOI QR코드

DOI QR Code

Effect of Hydrodynamic Condition on the Electrochemical Behavior of Various Metals in 3.5 wt% NaCl Solution

  • Pan, Szu-Jung (Ocean Energy Research Center, Tainan Hydraulics Laboratory, National Cheng Kung University) ;
  • Hadinata, Samuel-Sudibyo (Department of Materials Science and Engineering, National Cheng Kung University) ;
  • Kao, Ruey-Chy (Tainan Hydraulics Laboratory, National Cheng Kung University) ;
  • Tsai, Wen-Ta (Ocean Energy Research Center, Tainan Hydraulics Laboratory, National Cheng Kung University)
  • 투고 : 2015.07.23
  • 심사 : 2015.09.25
  • 발행 : 2015.10.31

초록

The electrochemical behaviors of various metals with and without diamond-like-carbon (DLC) coating in 3.5 wt% NaCl solution were investigated. The effect of hydrodynamic conditions was focused by employing a rotating disc electrode (RDE). The experimental results showed that each bare metal had a more positive corrosion potential and a higher corrosion rate due to enhanced oxygen transport at the higher rotating speed of the RDE. DLC coating caused a substantial increase in the corrosion resistance of all metals studied. However, localized corrosion was still found in the DLC-coated metal at sites where deposition defects existed. Surface morphology examination was performed after the electrochemical test to confirm the roles of hydrodynamic conditions and DLC coating.

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참고문헌

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