Journal of Surface Science and Engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Corrosion Damage Characteristics with Materials and Process Time in Ultrasonic-Chemical Decontamination of Immersion Type

침적식 초음파-화학 제염 시 재료 및 공정 시간에 따른 부식 손상 특성

  • Lee, Seung-Jun (Department of Power System Engineering, Kunsan National University) ;
  • Hyun, Koangyong (Division of Naval Officer Science, Mokpo National Maritime University) ;
  • Han, Min-Su (Division of Marine Engineering, Mokpo National Maritime University) ;
  • Kim, Seong-Jong (Division of Marine Engineering, Mokpo National Maritime University)
  • 이승준 (군산대학교 해양과학대학 마린엔지니어링전공) ;
  • 현광룡 (목포해양대학교 해군사관학부) ;
  • 한민수 (목포해양대학교 기관시스템공학부) ;
  • 김성종 (목포해양대학교 기관시스템공학부)
  • Received : 2018.08.28
  • Accepted : 2018.10.29
  • Published : 2018.10.31
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Abstract

In this study, we carried out an ultrasonic-chemical decontamination process with immersion type, reproduced in the laboratory. The corrosion damage characteristics, depending on kind of materials and ultrasonic process time, were investigated. Inconel 600, which showed lower corrosion potential and higher corrosion current density than that of STS 316, revealed severer corrosion damage and higher weight-loss rate than STS 316. Weight-loss rate of Inconel 600 increased with increasing ultrasonic process time. On the other hands, STS 316 presented a negligibly small corrosion damage, which was almost indistinguishable from visual observation. There was no effect of ultrasonic process time on the weight-loss rate of STS 316.

Keywords

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Fig. 1 Photographs of weight-loss specimens for STS 316 and Inconel 600 after ultrasonic-chemical decontamination process.

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Fig. 2 Surface morphology of STS 316 after ultrasonic-chemical decontamination process.

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Fig. 3 Surface morphology of Inconel 600 after ultrasonic-chemical decontamination process.

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Fig. 4 Weight-loss rate of STS 316 and Inconel 600 after ultrasonic-chemical decontamination process.

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Fig. 5 Tafel analysis of STS 316 and Inconel 600 after ultrasonic-chemical decontamination process.

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Fig. 6 Comparison of weight-loss rate of STS 316 and Inconel 600 after ultrasonic-chemical decontamination process with ultrasonic process time.

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Fig. 7 Mean weight-loss rate for total process cycle of STS 316 and Inconel 600 after ultrasonic-chemical decontamination process with ultrasonic process time.

Table 1. Chemical composition of STS 316 and Inconel 600.(wt%)

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Table 2. Process model on ultrasonic-chemical decomposition.

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