Aluminum (Al) is violently dissolved in 1, 1, 1-trichloroethane (CCl
3CH
3) once the induction period has passed. In the present paper, the dissolution rate of Al in CCl
3CH
3 was investigated.
It was found that: 1) The dissolution reaction of Al in CCl
3CH
3 was zero-order, as in such liquid organic halides as carbon tetrachloride (CCl
4), trichloroethylene and tetrachloroethane. 2) At temperatures ranging from room temperature to boiling point (347K) of CCl
3CH
3, the activation energy for the dissolution of Al in CCl
3 CH
3 was smaller than that in CCl
4 reported previously, indicating that the reactivity of CCl
3CH
3 to Al is higher than that of CCl
4. 3) When such organic reagents as methyl alcohol, n-buthyl alcohol, sec-buthyl amine, etc., were added as inhibitors in CCl
3CH
3, an increase occurred in the induction period of the reaction but there was no effect on the dissolution rate of Al. 4) CCl
3CH
3 solution to which AlCl
3 was added exhibited electrical conductivity, and based of this observation, the dissolution mechanism could be well explained by the ionic reaction. 5) Dissolution of Al was accompanied by the generation of a large quantity of hydrogen chloride, so it is thought that the dissolution rate of Al was greatly increased by a number of chain reactions.
View full abstract