ON THE GROWTH-MECHANISM OF THE SULFIDE SCALE ON AMORPHOUS AL-MO ALLOYS

The growth mechanism of the sulphide scale on amorphous Al-Mo alloys h as been studied using a marker technique. A very thin (5 nm) gold mark er film was deposited onto the surface of the Al-46Mo alloy and after sulphidation for 5 hours at 1073 K the gold marker distribution in the scale has been determined by RBS. It has been found that the main par t of the marker remained at the scale surface indicating that the doub le-layer sulphide scale on the discussed alloy is growing by the inwar d diffusion of sulphur.