Corrosion behavior of Inconel 690 and 693 in an iron phosphate melt

Interaction between borosilicate melt and Inconel

“…Earlier, Vidensky et al [5] studied the interactions between borosilicate melt with various Ni-Cr alloys including alloys 690 and 693 and recently Zhu et al [1] carried out similar study between phosphate melt and alloys 690 and 693. They reported the development of (Fe, Cr) 2 O 3 on material surfaces after corrosion.…”

“…Considering the harsh service environment involved in the vitrification process, nickel base alloy especially INCONEL Ò is regarded as a suitable melter pot material [1]. Rankin [2] and Bickford et al [3] carried out extensive studies on these materials and identified certain Ni base alloys those have good resistance to aqueous, high temperature and molten salt corrosion; and also can withstand oxidizing environment (in general HLWs are concentrated nitric acid solution and thus build up oxidizing environment within melter pot during vitrification).…”

“…Rankin [2] and Bickford et al [3] carried out extensive studies on these materials and identified certain Ni base alloys those have good resistance to aqueous, high temperature and molten salt corrosion; and also can withstand oxidizing environment (in general HLWs are concentrated nitric acid solution and thus build up oxidizing environment within melter pot during vitrification). Since presence of chromium gives better corrosion resistance to Ni-based alloys especially under oxidizing environment, so alloys like 690, 693 are commonly used as melter pot materials [1].…”

“…Several experiments have been carried out earlier to study the mode of interaction between Inconel and borosilicate/phosphate melt [1,5]. Many useful data are obtained on the corrosion of Inconel from such studies.…”

Characterization of monazite glass–ceramics as wasteform for simulated α-HLLW

“…It was indicated in the previous studies of the iron phosphate glass as a HLW wasteform that the pyrophosphate glass (O/P = 3.5) had the highest chemical durability [4][5][6][7][8]. But, any glass always tends to crystallize spontaneously.…”