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Abstract
A protective coating of 60SiO2–15CaO–10Al2O3–10Na2O–5TiO2 glass ceramic was performed on the ferritic stainless steel substrate by slurry technique. X-ray diffraction and scanning electron microscopy were used for detailed analyses of the coating. Open circuit potential, electrochemical impedance spectroscopy and potentiodynamic polarisation studies were carried out in artificial seawater to monitor the corrosion resistance behaviour of the coating at room temperature. The presence of coating reduced the corrosion current density Icorr and shifted corrosion potential Ecorr towards more noble values. It has been established through this study that glass ceramic coating on the steel substrate essentially improves the corrosion resistance property of the alloy and can be used for marine applications.
The authors gratefully acknowledge the financial support from UGC, India, under research grant nos. F. 4-1/2006 (BSR)/11-112/2008 (BSR) and F. 39-510/2010 (SR).