Eashwar, M. and Sathishkumar, , and Ravisgankar, R. and Subramanian, G. (2013) Sunlight-enhanced calcareous deposition on cathodic stainless steel in natural seawater. Biofouling, 29 (2). pp. 185-193. ISSN 0892-7014

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Abstract

In replicate series of experiments in natural seawater, one in full darkness and the other in a 1:1 diurnal cycle with as little as 5% of natural solar illumination, sunlight promoted calcareous deposition on cathodic stainless steel surfaces. As exemplified by scanning electron microscopy, the deposit that formed under the natural diurnal cycle, in the presence of photosynthetic biofilms, was composed of finer calcareous crystals that provided more compact and more uniform surface coverage than the one formed in the dark. The light-enhanced deposit also possessed better scale properties, as suggested by X-ray analysis and electrochemical measurements. Sunlight enhancement of calcareous deposition looked all the more conspicuous when day and night regimes were examined independently. These results not only bear important implications for cathodic protection in marine waters, but also provide an intriguing analogy to coral reef calcification

Item Type:	Article
Uncontrolled Keywords:	biofouling
Subjects:	Biocorrosion Corrosion Science and Engineering
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	05 Jan 2015 08:49
Last Modified:	05 Jan 2015 08:49
URI:	http://cecri.csircentral.net/id/eprint/3123

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