濃厚硫酸溶液中における純鉄のアノード挙動について

概要

論文の詳細を見る
In order to study the anodic polarization curve of pure iron in concentrated sulphuric acid, the effects of acid concentration of solution and temperature were persued. 　And passive state of pure iron in concentrated sulphuric acid was compared with in concentrated sodium hydroxide solution. The experimental results are summarized as follows. (1) With increasing solphuric acid concentration, the potential in sulphation range shifted lower and Flade potential shifted higher, on the other hand, the current density in sulphation range decreased and it increased in passive range. But at acid concentration 20N the current density in passive range decreased because of conductance decreasing. (2) With raising temperature, Flade potential was higher, and both the current density in sulphation range and in passive range increased. And the values of the apparent activation energy were 8.8Kcal/mol in sulphation range and 15.2Kcal/mol in passive range respectively. (3) Pure iron in concentrated sodium hydroxide solution was passivated easier than in concentrated sulphuric acid solutions, and so more stable.
津山工業高等専門学校の論文
1977-09-30