Microstructure, spallation and corrosion of plasma sprayed Al2O3–13%TiO2 coatings

Enhancement of corrosion protection of AISI 304 stainless steel by nanostructured sol–gel TiO2 films

“…can be deposited on metals to improve their surface properties [5][6][7][8][9][10][11]. There are several techniques for the deposition of ceramics films and coatings on metal substrate, such as chemical vapor deposition (CVD) [12], physical vapor deposition (PVD) [13], plasma spraying [14], electrochemical deposition [15] and sol-gel process [5,6,10,[16][17][18][19][20][21][22]. The sol-gel method is an environmentally friendly technique of surface protection and had showed the potential for the replacement of toxic pretreatments and coatings which have traditionally been used for increasing corrosion resistance of metals.…”

Microstructural characterisation of air plasma sprayed nanostructure ceramic coatings on Mg–1%Ca alloys (bonded by NiCoCrAlYTa alloy)

“…This composition was also modified by using granulated nanostructure powders. In fact, air plasma-sprayed nanostructure Al 2 O 3 -13 wt% TiO 2 coating demonstrated better mechanical and corrosion properties than the conventional Al 2 O 3 -13 wt% TiO 2 coating [13,19,21,23,[29][30][31][32][33]. However, there still remains one major problem concerning plasma spraying, which is the presence of lamellar structures and microdefects including pores and micro-cracks; these tend to reduce the hardness and deteriorate the wear and corrosion performances of the coatings [20,29,31].…”

Effect of TiO 2 content on the acid resistance of a ceramic proppant

“…Wang et al [19] have reported that adding TiO 2 into Al 2 O 3 can reduce the porosity and improve the corrosion resistance. So in the present work, acid-resistant proppants were prepared in an ATBM system without SiO 2 .…”