Two types of corrosion tests were conducted. Immersion test was used to determine dissolved metal ions in carbonate. Coating test-was used simulating separator surface on which wetted by thin salt layer, to determine the distribution of metal ions in oxide and salt. Conditions of corrosion tests are listed in Table 1.

Four types of alloys (type 304: 18. l%Cr-8.3%Ni, 316L: 16.3%Cr-11.9%Ni-2.5%Mo, 310S: 24.8%Cr-21.4%Ni and the developed ally:30. l%Crr44.9%Ni-1.0%A1-0.045%Y) were used.

Table 1 Conditions of corrosion test
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