Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Corrosion Tests for High Chromium Cast Iron Using Galvanostatic Polarization Technique in a Simulating Slurry Solution

모사 슬러리 용액에서 정전류 분극을 활용한 고크롬 주철 부식 시험

  • Ochgerel Baasanjav (Materials Convergence and System Engineering, Changwon National University) ;
  • Jun-Seob Lee (Materials Convergence and System Engineering, Changwon National University) ;
  • Ye-Jin Lee (Materials Convergence and System Engineering, Changwon National University) ;
  • Jun-Seok Oh (i-Casting Tech Ltd.) ;
  • Je-hyun Lee (Materials Convergence and System Engineering, Changwon National University)
  • 바산자프 오취개럴 (국립창원대학교 소재융합시스템공학과) ;
  • 이준섭 (국립창원대학교 소재융합시스템공학과) ;
  • 이예진 (국립창원대학교 소재융합시스템공학과) ;
  • 오준석 ((주)아이-캐스팅테크) ;
  • 이재현 (국립창원대학교 소재융합시스템공학과)
  • Received : 2023.07.24
  • Accepted : 2023.08.08
  • Published : 2023.08.30
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Abstract

The galvanostatic polarization technique was used to accelerate corrosion in high chromium cast iron (HCCI) immersed in a simulated slurry solution of 0.1 mol dm-3 H2SO4, 0.05 mol dm-3 HCl, and 10 wt% SiC. The HCCI contained 27 wt% of Cr and 2.8 wt% of C, and its microstructure mainly comprised austenitic and carbide phases. A two-electrode system using a dense carbon rod and the HCCI sample was employed for the galvanostatic polarization by applying an anodic current for 24 hours. The corrosion rate increased upon applying the anodic current, but the increase was not significant, particularly for current densities higher than 10 µA cm-2. Following polarization, the corrosion morphology revealed that the anodic current accelerated surface corrosion in the HCCI; however while the depth of the corroded area increased, the increase was not substantial. The propagation behavior of the anodic current and its impact on corrosion were further discussed.

Keywords

Acknowledgement

본 과제(결과물)는 교육부와 한국연구재단의 재원으로 지원을 받아 수행된 3단계 산학연협력 선도대학 육성사업(LINC 3.0)의 연구결과입니다.

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