文档介绍：Surface & Coatings Technology 204 (2009) 477–483
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Surface & Coatings Technology
journal homepage: ate/surfcoat
Zirconia sol–gel coatings on alumina–silica refractory material for improved
corrosion resistance
Aaron J. Kessman, Karpagavalli Ramji, Nicholas J. Morris, Darran R. Cairns ⁎
Department of Mechanical & Aerospace Engineering, West Virginia University, Morgantown, West Virginia, USA
article info abstract
Article history: The corrosion resistance of a simple zirconia (ZrO2) sol–gel coating deposited from a highly dilute sol on an
Received 2 January 2008
alumina–silica (Al2O3–SiO2) refractory crucible material to molten borosilicate glass was investigated. The
Accepted in revised form 14 August 2009
bulk density and porosity of the Al2O3–SiO2 refractory substrate material measured by mercury intrusion
Available online 25 August 2009
porosimetery (MIP) were g/ml and 38%, respectively. The porosity measurements were verified by
electron microscopic image analysis, revealing that the porosity was appreciably decreased to a value of 18%
Keywords:
for the ZrO coated refractory. The corrosion loss of an uncoated refractory in molten borosilicate glass held
Sol–gel 2
Zirconia coating at 1400 °C for 168 h was 27%, as measured by ASTM C621-84. A lower corrosion loss of 16% was observed for
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Refractory ZrO2