Microstructural characteristics of the oxide films formed on Alloy 690 TT in pure and primary water at 325°C

Effect of electropolishing on corrosion of Alloy 600 in high temperature water

“…While the oxide preliminarily showed a crystalline structure, amorphous phases were also observed. As concluded by other studies, the crystalline oxide is most likely the spinel [7,17,18,22], while the amorphous phases are likely the hydroxide of Cr and Ni, or the oxide of Ni [27][28][29][30][31].…”

Influence of later-dissolved oxygen on microstructural changes in oxide films formed on Alloy 690TT in hydrogenated primary water

“…To form such a protective oxide film and to decrease the corrosion rate, a certain hydrogen partial pressure is maintained in primary water to maintain a reducing environment during the nuclear reactor operation. The microstructure and chemical composition of surface oxide films formed on Ni-based alloys in simulated normal hydrogenated primary water containing B and Li have been extensively studied [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. It is widely agreed that an oxide film grown on Alloy 690TT consists of an outer layer containing mixed spinel oxide particles of Ni, Cr, and Fe, and an inner layer containing continuous and compact Cr-rich oxides.…”

Galvanic Corrosion between Alloy 690 and Magnetite in Alkaline Aqueous Solutions

“…Although Alloy 690 shows excellent corrosion resistance in PWR environments, it may suffer from corrosion related degradation in high temperature and pressure water [5][6][7][8][9].…”