The corrosion of SiO2/Al2O3, TiO2/Al2O3 and (SiO2 + TiO2)/Al2O3 ceramic com
posite coatings on Q235 substrate fabricated by means of plasma spraying wa
s investigated. The results show that Al2O3+13 wt pct TiO2 ceramic coating
has the highest density, the lowest connected porosity and the best corrosi
on resistance. The corrosion mechanism of Q235 with ceramic coating has als
o been studied.