A PROCESS FOR FABRICATING METAL-METAL SALT ELECTRODES COMPRISING FORMING A COATING OF A BINARY METAL SALT COMPOSITION ON A METAL SUBSTRATE AND LEACHING A SOLUBLE COMPONENT FROM THE COMPOSITION. A POROUS METAL SALT COATING IS THEREBY FORMED ON THE METAL SUBSTRATE. PREFERABLY THE BINARY SALT COMPOSITION IS A EUTECTIC COMPOSISTION WHICH HAS A LOW METLING POINT AND PROVIDES A POROUS STRUCTURE AFTER LEACHING.