Corrosion rate of the Al-Cr-Ti alloys with relatively high chromium content in 1 M HCl solution are almost one order of magnitude lower than those of Al-Cr alloys. The ternary alloys are passivated spontaneously, while the open circuit potentials of Al-Cr alloys are in the active region even if a large amount of chromium is added. The higher corrosion resistance of the Al-Cr-Ti alloys in comparison with Al-Cr and Al-Ti alloys can be explained in terms of the beneficial effects of titanium addition preventing the enrichment of aluminum in the surface film and chromium addition enhancing the passivity and cathodic reactions even in the chloride containing strong acid.
|Number of pages
|Materials Science Forum
|Published - 1995
|Proceedings of the 7th International Symposium on Passivity Passivation of Metals and Semiconductors - Clausthal, Ger
Duration: 1994 Aug 21 → 1994 Aug 26