NaCl/NaF水溶液中におけるType 304ステンレス鋼のすきま内溶液のpH変化とCl-濃縮
1999 年 48 巻 9 号 p. 569-574
詳細
1999 年 48 巻 9 号 p. 569-574
Concentrating behavior of hydrogen and chloride ion in the anolyte during electrolysis for type 304 stainless steel was studied using the cell separated with a glass filter in various concentrations of NaCl/NaF mixed solution.
In NaCl solutions, charge passed during electrolysis, Q was in the linear relationship with pH decreasing, while two-stages in concentrating process with slow and then fast rate were observed for Cl-. Decreasing pH of the anolyte was mainly dependent on the increasing of Cl- concentration.
NaCl/NaF mixed solutions, the rate of decreasing pH and increasing Cl- concentration in the anolyte during electrolysis decreased with increasing NaF concentration in constant concentrations of NaCl solution.
The results suggest that fluoride ions act as a inhibitor to chloride ions-induced crevice corrosion for stainless steel.
