Electrochemical heterogeneity and chemical stability of anodic oxide films of barrier type on certain valve metals and alloys

Direct current and alternating current electrochemical methods are used to study kinetic regularities and mechanism of titanium films dissolution in NaOH and H2SO4 concentrated solutions. Piece-line dependence of oxidized electrode specific reverse capacitance on the time of Cc-1=αi-βiτ type is stated. Effective activation energy and dissolution reaction apparent order are determined by agressive ions. For amorphous alloys films interrelation of structure heterogeneity, film composition and resistance to pitting corrosion is shown. Decrease of oxide protecting properties is due to crystallization of originally amorphous films