Recent Trends of the Use of Rare Earth Elements for Efficient Environmentally Compliant Corrosion Protection of Aluminum and Its Alloys

摘要

Aluminum and its alloys find various applications in both mass production and hi-tech industrial sectors. This metal is widely used in the form of both low and high-doped alloys. The low-doped Al-alloys are generally used for household and hi-tech applications since they do not possess satisfactory mechanical strength related properties. The extended mechanical properties of the high-doped alloys enable their use as construction materials for the aircraft and automotive industries, for marine transport, as well as for exterior and interior architectonic constructions. However, reliable long-term exploitation of the Al-based facilities and equipment is strongly restricted due to their aptitude to undergo corrosion, especially in neutral or alkaline media with dissolved O_2~(2-) and Cl~- ions. Recently, cerium compounds were found to be efficient environmentally friendly corrosion inhibitors and protective primer layers. In this sense, the present brief review aims to comprise the recent trends in the field of cerium compounds use for the elaboration of advanced corrosion protective coatings.