Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Identifying Factors Affecting Surface Roughness with Electropolishing Condition Using Full Factorial Design for UNS S31603

UNS S31603에 대하여 완전요인설계를 이용한 전해연마조건에 따른 표면 거칠기의 유효인자 산출

  • Hwang, Hyun-Kyu (Graduate school, Mokpo national maritime university) ;
  • Kim, Seong-Jong (Division of marine engineering, Mokpo national maritime university)
  • 황현규 (목포해양대학교대학원) ;
  • 김성종 (목포해양대학교기관시스템공학부)
  • Received : 2022.08.14
  • Accepted : 2022.08.26
  • Published : 2022.09.02
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Abstract

The objective of this investigation was to indentify major factors affecting surface roughness among various parameters of electropolishing process using the design of an experiment method (full factorial design) for UNS S31603. Factors selected included electrolyte composition ratio, applied current density, and electrolytic polishing time. They were compared through analysis of variance (ANOVA). Results of ANOVA revealed that all parameters could affect surface roughness, with the influence of electrolyte composition ratio being the highest. As a result of surface analysis after electropolishing, the specimen with the deepest surface damage was about 35 times greater than the condition with the smallest surface damage. The largest value of surface roughness after electropolishing was higher than that of mechanical polishing due to excessive processing. On the other hand, the smallest value of surface roughness after electropolishing was 0.159 ㎛, which was improved by more than 80% compared to the previous mechanical polishing. Taken all results together, it is the most appropriate to perform electrolytic polishing with a sulfuric acid and phosphoric acid ratio of 3:7, an applied current density of 300 mA/cm2, and anelectrolytic polishing time of 5 minutes.

Keywords

Acknowledgement

이 논문은 해양수산부 재원으로 해양수산과학기술진흥원의 지원을 받아 수행된 연구임(선박 배출 대기오염물질 동시저감 후처리시스템 실증 및 인증체계 구축).

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