Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Reliability Evaluation of ER Type Corrosion Sensor for Monitoring Corrosion of Piping System Under Accelerated Corrosion Environment

배관의 부식 상태 진단에 사용되는 ER 부식센서의 가속부식환경에서의 신뢰성 평가

  • Hwang, Hyun-Kyu (Graduate School, Mokpo National Maritime University) ;
  • Shin, Dong-Ho (Graduate School, Mokpo National Maritime University) ;
  • Kim, Heon-Hui (Division of Marine Engineering, Mokpo National Maritime University) ;
  • Lee, Jung-Hyung (Division of Marine Engineering, Mokpo National Maritime University)
  • 황현규 (목포해양대학교 대학원) ;
  • 신동호 (목포해양대학교 대학원) ;
  • 김헌희 (목포해양대학교 기관시스템공학부) ;
  • 이정형 (목포해양대학교 기관시스템공학부)
  • Received : 2021.11.21
  • Accepted : 2021.11.26
  • Published : 2021.12.31
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Abstract

In this study, the reliability of a commercial ER-type corrosion sensor was evaluated under an accelerated corrosion environment to verify its suitability for application in monitoring of ship's seawater piping system. A closed-loop pump piping testbed was designed and constructed to compare the wall thickness reduction of the pipe and the response from the sensor. The sensor was attached inside the pipe near the outlet of the pump that was exposed to a 3.5% NaCl solution with or without copper accelerated acetic acid (CASS). The results demonstrated that the presence of CASS significantly increased the corrosivity of the solution as well as the thickness reduction of the pipe, as expected. On the other hand, the corrosion products formed by the solution with CASS were thicker compared with those without CASS. The sensor response to temperature variation was found to be a clear linear relationship for the solution without CASS but there was a non-linear relationship where CASS was present.

Keywords

Acknowledgement

This work was supported by the 'Autonomous Ship Technology Development Program (2001-1164, Development of Performance Monitoring and Failure Prediction and Diagnosis Technology for Engine System of Autonomous Ships)' funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).

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