Please use this identifier to cite or link to this item: https://gnanaganga.inflibnet.ac.in:8443/jspui/handle/123456789/2205
Title: Corrosion Kinetics of Al2O3+Zro2·5cao Coatings Applied on Gray Cast Iron Substrate
Authors: Abhinav
Krishnamurthy, N
Jain, Ranjana
Keywords: Corrosion
Corrosion kinetics
Gray Cast Iron (GCI)
Iron oxide
Fe2O3H2O
Scanning Electronic Microscopic (SEM)
Issue Date: 1-Dec-2017
Publisher: Ceramics International
Citation: Vol. 43, No. 17; pp. 15708-15713
Abstract: A Corrosion test was carried out on plasma sprayed alumina plus calcia stabilized zirconia coatings applied on the Gray Cast Iron (GCI) substrates. The specimens were prepared by coating a bond coat comprising Fe38Ni10Al and a top coat of Al2O3+ZrO2·5CaO in 50:50 proportions on GCI substrates. The top coat thickness was varied as 100,200 and 300 µm. In the test, specimens were exposed to the saline aqueous NaCl solution for a period of 24 h. Weight loss of specimen was measured at the interval of 8 h followed by Scanning Electronic Microscopic (SEM) and EDAX analysis. From the results obtained, it was found that the iron present in the bond coat of the sample was subjected to corrosion. It led the way to the formation of hydrated iron oxide (Fe2O3H2O) which is visible on the top coat of specimens. Pores present in the coating system and relatively less coating thickness has mainly attributed for the corrosion of bond coat.
URI: https://doi.org/10.1016/j.ceramint.2017.08.131
http://gnanaganga.inflibnet.ac.in:8080/jspui/handle/123456789/2205
ISSN: 0272-8842
1873-3956
Appears in Collections:Journal Articles

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