Effects of RE x O y addition on corrosion behavior of the Al–Cu alloys in 3.5wt.% NaCl solution and pH=4 acid solution.

Highlights: [•] The Al–Cu alloys modified by RE x O y have superior corrosion resistance than those unmodified alloys. [•] In 3.5wt.% NaCl solution, the corrosion resistance increases with the increasing RE x O y content. [•] In pH=4 acid solution, the corrosion resistance decreases with the increasing RE x O y content. [ABSTRACT FROM AUTHOR]