Anti corrosion treatment of aluminium or aluminium alloy surfaces

摘要

PCT No. PCT/AU93/00594 Sec. 371 Date May 23, 1995 Sec. 102(e) Date May 23, 1995 PCT Filed Nov. 23, 1993 PCT Pub. No. WO94/12687 PCT Pub. Date Jun. 9, 1994.An anti corrosion treatment of an aluminium or aluminium alloy surface comprising the steps of treating the surface with a solution having a pH of from greater than 0 to less than 2 and comprising at least one metal oxo ion completed with phosphorus (V) wherein the metal oxo ion is vanadate or tungstate or a mixture thereof.