Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Optimization of Electropolishing Conditions with Statistical and Surface Analyses Using Taguchi Method for Austenitic Stainless Steel

다구찌 기법을 활용한 통계적·표면 분석에 따른 오스테나이트 스테인리스강의 전해연마조건 최적화 연구

  • Hwang, Hyun-Kyu (Graduate school, Mokpo national maritime university) ;
  • Kim, Seong-Jong (Division of marine engineering, Mokpo national maritime university)
  • 황현규 (목포해양대학교 대학원) ;
  • 김성종 (목포해양대학교 기관시스템공학부)
  • Received : 2022.08.29
  • Accepted : 2022.09.17
  • Published : 2022.11.02
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Abstract

Electropolishing has various parameters because an electrochemical reaction is applied. Accordingly, experiments to determine factors and levels of electropolishing conditions are in progress for various materials. The purpose of this investigation was to optimize conditions for electropolishing using the taguchi method for UNS S31603. Factors such as electrolyte composition ratio, electrolyte temperature, and electropolishing process time were selected. Electropolishing was optimized using analysis of variance (ANOVA), signal-to-noise ratio (the smaller the better characteristics), and surface analysis. Results of ANOVA revealed that only the electrolyte composition ratio among factors was effective for surface roughness. As a result of statistical analysis of the signal-to-noise ratio, the highest signal-to-noise ratio was calculated under electropolishing conditions with sulfuric acid and phosphoric acid ratio of 4:6, an electrolyte temperature of 75 ℃, and electropolishing process time of 7 minutes. In addition, the surface roughness after electropolishing under the above conditions was 0.121 ㎛, which was improved by more than 88% compared to mechanical polishing.

Keywords

References

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