Corrosion Characteristics of Corrosion-Resistant Metal with Different Composition Ratios of Acetic Acid and Acetonitrile at High Temperature and Pressure

被引：0
|
作者：
Hwang, Hyun-Kyu [1 ]
Shin, Dong-Ho [1 ]
Lee, Seung-Jun [2 ]
Kim, Seong-Jong [3 ]
机构：
[1] Mokpo Natl Maritime Univ, Grad Sch, Dept Marine Engn, 91 Haeyangdaehak Ro, Mokpo Si 58628, Jeollanam Do, South Korea
[2] Kunsan Natl Univ, Dept Marine Engn, 558 Daehak Ro, Gunsan Si 58628, Jeollabuk Do, South Korea
[3] Mokpo Natl Maritime Univ, Div Marine Syst Engn, 91 Haeyangdaehak Ro, Mokpo Si 58628, Jeollanam Do, South Korea
来源：
CORROSION SCIENCE AND TECHNOLOGY-KOREA | 2024年 / 23卷 / 02期
关键词：
Stainless steel; Acetic acid; Acetonitrile; Petrochemical plants; High temperature and pressure; AUSTENITIC STAINLESS-STEEL; BEHAVIOR; DUPLEX;
D O I：
10.14773/cst.2024.23.2.154
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
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 mu m, which was approximately 25.25 mu m 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.
引用
收藏
页码：154 / 165
页数：12
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