Compatibility of ITER candidate materials with static gallium

Author

Luebbers, P.R. ; Chopra, O.K.

Author_Institution

Div. of Energy Technol., Argonne Nat. Lab., IL, USA

Volume

1

fYear

1995

fDate

30 Sep-5 Oct 1995

Firstpage

232

Abstract

Corrosion tests have been conducted to determine the compatibility of gallium with candidate structural materials for the International Thermonuclear Experimental Reactor (ITER) first wall/blanket systems, e.g., Type 316 stainless steel (SS), Inconel 625, and Nb-5 Mo-1 Zr. The results indicate that Type 316 SS is least resistant to corrosion in static gallium and Nb-5 Mo-1 Zr alloy is most resistant. At 400°C, corrosion rates for Type 316 SS, Inconel 625, and Nb-5 Mo-1 Zr alloy are ≈4.0, 0.5, and 0.03 mm/yr, respectively. Iron, nickel, and chromium react rapidly with gallium. Iron shows greater corrosion than nickel at 400°C (⩾88 and 18 mm/yr, respectively). The present study indicates that at temperatures up to 400°C, corrosion occurs primarily by dissolution and is accompanied by formation of metal/gallium intermetallic compounds. The growth of intermetallic compounds may control the overall rate of corrosion

Keywords

austenitic stainless steel; chromium alloys; corrosion; fusion reactor blankets; fusion reactor materials; fusion reactors; gallium; molybdenum alloys; nickel alloys; niobium alloys; zirconium alloys; 400 C; ITER candidate materials; Inconel 625; International Thermonuclear Experimental Reactor; Nb-5 Mo-1 Zr; NbZrMo; Ni-Cr; Type 316 stainless steel; candidate structural materials; compatibility; corrosion tests; dissolution; first wall/blanket systems; intermetallic compounds; static Ga; Building materials; Conducting materials; Corrosion; Gallium alloys; Intermetallic; Iron; Materials testing; Nickel; System testing; Zirconium;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 1995. SOFE '95. Seeking a New Energy Era., 16th IEEE/NPSS Symposium

Conference_Location

Champaign, IL

Print_ISBN

0-7803-2969-4

Type

conf

DOI

10.1109/FUSION.1995.534210

Filename

534210