High temperature corrosion behavior of Ni-based alloys

• Published in: Metals and materials international Vol. 18; no. 6; pp. 939 - 949
• Main Authors: Cho, Soo-Haeng, Oh, Seung-Chul, Park, Seong-Bin, Ku, Kwang-Mo, Lee, Jong-Hyeon, Hur, Jin-Mok, Lee, Han-Soo
• Format: Journal Article
• Language: English
• Published: Springer The Korean Institute of Metals and Materials 01.12.2012; Springer Nature B.V; 대한금속·재료학회
• Subjects: Alloys; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion; Corrosion products; Corrosion tests; Engineering Thermodynamics; Fused salts; Heat and Mass Transfer; Intergranular corrosion; Machines; Magnetic Materials; Magnetism; Manufacturing; Materials Science; Metallic Materials; Nickel base alloys; Oxides; Processes; Solid Mechanics; Superalloys; 재료공학; alloys; corrosion; scanning electron microscopy (SEM); electrolytic reduction
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-012-6005-4

The high temperature corrosion behavior of N07263, N06600, and N06625 in LiCl-Li 2 O molten salt was investigated at temperatures ranging from 650 to 850 °C in a glove box. The high temperature corrosion behavior was observed using measurements of the oxide morphology and thickness, the extent of internal corrosion, and the compositional changes in the scale and in the substrate. Corrosion tests were performed, and these demonstrated that the main corrosion products were Fe(Ni,Co) 3 , FeNi 3 , and LiCrO 2 . The internal corrosion of N07263 was localized, while that of N06600 maintained intergranular corrosion throughout the test temperature range. N06625 exhibited uniform intergranular corrosion behaviors at low and high temperatures. N07263 exhibited superior corrosion resistance, as evidenced by its corrosion layer which was more continuous, dense, and adherent when compared with those of N06600 and N06625.