The relationship between microstructure and electrochemical behaviour of mixed Ru02 - Ti02 coatings on titanium substrate for CI2 production

Ru02 - Ti02 coatings because of very good corrosion resistance and electrochemical properties have been widely used in chlor - alkali industries. In the present work, Ru02 - Ti02 coatings were produced by thermal decomposition from aqueous solutions of ruthenium and titanium chlorides n appropriate combination. The electrochemical behaviours of coatings were assessed by electrochemical techniques such as cyclic voltammetry and polarisation measurements. SEM micrographs of the electrodes show a cracked - mud morphology over the electrodes. Microscopic observation of the electrodes surfaces indicated deepening of cracks and pit formation on the surfaces by electrolysis. The compactness and uniformity of the coating improved as the Ru02 content increased. 'The increase in Ru02 content also decreased the overpotential. It is concluded that it is more benefi. cial to coat the used anodes for chlor. alkali industry for a cost saving purpose, while electrochemicai behaviour doesn't change.

کلیدواژه ها:

Dimensionally Stable Anodes (DSA) ، Ru02 - Ti02 coating ، Chlorine Overpotential