SEM图:(a)带氧化皮钢筋;(b)~(f):钢筋在溶胶凝胶中Ce (Ⅲ) 浓度为0.5 M不同pH条件下形成的溶胶凝胶膜:(b) pH = 3; (c) pH = 5; (d) pH = 7; (e) pH = 9; (f) pH = 11.
SEM image: (a) steel bar with oxide skin; (b)~(f) : sol-gel film formed under different pH conditions with Ce (Ⅲ) concentration of 0.5 M in sol-gel: (b) pH = 3; (c) pH = 5; (d) pH = 7; (e) pH = 9; (f) pH = 11.