Dr. Yan et al., An investigation of the corrosion behavior of Al2O3-based ceramic composite coatings in dilute HCl solution, SURF COAT, 141(1), 2001, pp. 1-6
In this paper, the corrosion behavior of Al2O3-SiO2, Al2O3-TiO2 and Al2O3-S
iO2-TiO2 ceramic composite coatings in boiling 1 N HCl solution is investig
ated. It is shown that the addition of 3% SiO2 to the base spraying powder
of Al2O3 increases porosity in the coatings and causes deterioration in the
ir corrosion resistance. Adding 13% TiO2 to Al2O3 improves the anti-corrosi
on property of the ceramic coating due to a reduction in porosity. The conn
ected porosity in the Al2O3-based ceramic composite coatings rises with the
open porosity and is independent of the density of the coating. (C) 2001 E
lsevier Science B.V. All rights reserved.