Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Correlation of Surface Oxide Film Growth with Corrosion Resistance of Stainless Steel

스테인리스 스틸의 표면 산화피막 성장과 내부식성 상관관계

  • Received : 2021.06.07
  • Accepted : 2021.06.17
  • Published : 2021.06.30
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Abstract

Stainless steel is a metal that does not generate rust. Due to its excellent workability, economic feasibility, and corrosion resistance, it is used in various industrial fields such as ships, piping, nuclear power, and machinery. However, stainless steel is vulnerable to corrosion in harsh environments. To solve this problem, its corrosion resistance could be improved by electrochemically forming an anodized film on its surface. In this study, 316L stainless steel was anodized at room temperature with ethylene glycol-based 0.1 M NH4F and 0.1M H2O electrolyte to adjust the thickness of the oxide film using different anodic oxidation voltages (30 V, 50 V, and 70 V) with time control. The anodic oxidation experiment was performed by increasing the time from 1 hour to 7 hours at 2-hour intervals. Corrosion resistance according to the thickness of the anodic oxide film was observed. Electrochemical corrosion behavior of oxide films was investigated through polarization experiments.

Keywords

Acknowledgement

본 연구는 과학기술정보통신부 및 정보통신기획평가원의 지역지능화혁신인재양성(Grand ICT연구센터) 사업의 연구결과로 수행되었음(IITP-2021-2020-0-01791).

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