Influence of CeAlO3 nanopowder addition on the performances of silane coatings for AZ31 alloy corrosion protection

Abstract

This research investigates the influence exerted by CeAlO3 nano-particle addition to the protective performances of various bi-functional silanes (3-Mercapto-propyl-trimetoxy-silane, PSH; Vinyl-trimethoxy-silane, VS; 3-(Trimethoxysilyl)propyl-methacrylate, PSMA; 1,2-Bis-(triethoxysilyl)-ethane, BTSE) used as conversion coatings for AZ31 Mg alloy. The addition of the nanopowder increases either the inhibition efficiency of the silanic coatings and the persistence of their protective action. The best result is experienced with PSH. In this case, after 168h immersion in 0.1M NaCl solution, CeAlO3 loaded PSH conversion coating displayed an inhibiting efficiency over 99%