Corrosion properties of Inconel-600 and 304 stainless steel in new oxidative and reductive decontamination reagent

• Published in: Metals and materials international Vol. 21; no. 4; pp. 678 - 685
• Main Authors: Jung, Jun Young, Park, Sang Yoon, Won, Hui Jun, Kim, Seon Byeong, Choi, Wang Kyu, Moon, Jei Kwon, Park, So Jin
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Institute of Metals and Materials 01.07.2015; Springer Nature B.V; 대한금속·재료학회
• Subjects: Austenitic stainless steels; Base metal; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion; Corrosion inhibitors; Corrosion tests; Decontamination; Engineering Thermodynamics; Heat and Mass Transfer; Machines; Magnetic Materials; Magnetism; Manufacturing; Materials Science; Metallic Materials; Nickel base alloys; Oxalic acid; Processes; Solid Mechanics; Stainless steels; Superalloys; 재료공학; decontamination; corrosion; oxides; grain boundary; HYBRID process
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-015-4572-x

to minimize the damage of base metals by the corrosion in this study. Type 304 stainless steel (304SS) and Inconel-600 (I-600) that are major components of the primary coolant system in pressurized water reactor were tested. To improve the integrity of base metal to the corrosion, we tested Ni 2+ , Fe 3+ , Cr 6+ , or Cu 2+ by adding in NP solutions as a corrosion inhibitor and found that general and local corrosions were suppressed by the addition of Cu 2+ ion. Decontamination performance and corrosion tests for NP(Cu) process with HYBRID (HYdrazine Base Reductive metal Ion Decontamination) process as a multi-step process were carried out and compared with existing processes such as citric-oxalic acid and oxalic acid. Our tests revealed that NP(Cu)-HYBRID process greatly inhibited local corrosions such as pits and Intergranular Attack. Moreover the proposed process was assured by the decontamination performance equivalent to other conventional processes.