Електрохімічне формування молібденвмісних анодних оксидних покриттів на сталі 08Х18Н10

Abstract

The kinetics of the anodic formation of oxide layers on steel in the potentiodynamic mode with a potential sweep rate of 2 mV·с-1 in acidic sulfate electrolytes was studied using the linear voltammetry method. It has been established that an increase in the concentration of molybdenum oxoanions leads to an increase in anodic currents and an expansion of the active dissolution region, to a shift of the stationary potential to an electropositive region, which indicates that oxoanions passivated the steel surface. Studies of the morphology and structures of the obtained coatings revealed that an increase in the concentration of molybdenum oxoanions leads to a decrease in the size of the globules, and at a certain concentration the association of the globules is observed.