Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Corrosion Characteristics of Corrosion-Resistant Metal with Different Composition Ratios of Acetic Acid and Acetonitrile at High Temperature and Pressure

고온 및 고압조건에서 아세트산과 아세토나이트릴의 성분비에 따른 부식저항성 금속의 부식특성

  • Hyun-Kyu Hwang (Department of marine engineering, Graduate school, Mokpo national maritime university) ;
  • Dong-Ho Shin (Department of marine engineering, Graduate school, Mokpo national maritime university) ;
  • Seung-Jun Lee (Department of marine engineering, Kunsan national university) ;
  • Seong-Jong Kim (Division of marine system engineering, Mokpo national maritime university)
  • 황현규 (국립목포해양대학교 대학원, 기관시스템공학과) ;
  • 신동호 (국립목포해양대학교 대학원, 기관시스템공학과) ;
  • 이승준 (군산대학교 ONSE대학 기관공학전공) ;
  • 김성종 (국립목포해양대학교 기관시스템공학)
  • Received : 2024.01.12
  • Accepted : 2024.02.07
  • Published : 2024.04.30
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Abstract

Acetic acid and acetonitrile produced in the chemical process of petrochemical plants are used at high temperatures and pressures. They are exposed to harsh corrosive environments. The present investigation aimed to evaluate corrosion characteristics of metals with excellent corrosion resistance by performing immersion and electrochemical experiments with different composition ratios of acetic acid and acetonitrile in a high-temperature and high-pressure environment. Results of immersion experiment revealed that as acetic acid concentration increased, surface damage and corrosion also increased. In immersion experiments under all conditions, super austenitic stainless steel (UNS N08367) had the best corrosion resistance among various metals. The maximum damage depth under the most severe immersion conditions was observed to be 4.19 ㎛, which was approximately 25.25 ㎛ smaller than that of highly damaged stainless steel (UNS S31804). As a result of electrochemical experiments, electrochemical characteristics of various metals presented some differences with different composition ratios of acetic acid and acetonitrile. However, super austenitic stainless steel (UNS N08367) had the best corrosion resistance at a high pressure condition with a high concentration of acetic acid.

Keywords

Acknowledgement

이 논문은 (주)금호석유화학의 연구비 지원으로 수행된 연구임.

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