Natesan, M. and Muralidharan, S. and Palaniswamy, N. (2010) Atmospheric Corrosion Performance of Engineering Materials in India. NACE International, 49 (8).

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Industrial growth during the last decade has made it necessary to evaluate installations, equipment, and metallic and nonmetallic structures exposed to the atmosphere. The atmosphere has also become more contaminated and therefore more aggressive to materials exposed to an enormous quantity of gases. India has mainly three seasons in a year: rainy (June through September, southwest monsoon, and October through November, northeast monsoon), summer (April through July), and winter (mid-October through February). The country has a coastline of more than 7,500 km, the reason for the high airborne salinity in many areas. The air quality in big cities has decreased significantly. A variety of industrial processes, such as the production of iron and steel, utility factories, and crude oil processing, pollute the atmosphere by the release of sulfur dioxide (SO2). SO2 can also be emitted by natural disasters or means such as volcanoes, sea spray, plankton, and rotting vegetation. Overall, 69.4% of SO2 is produced by industrial combustion and >90% of the sulfur in the atmosphere is of human origin.1 Steel, zinc, galvanized metals, and aluminum are found to be very sensitive to acidic pollutants, especially SO2 and acid rains.2 No systematic research on atmospheric corrosion of the steel and other metals has been done in India. Before 1970, little quantitative atmospheric corrosion data had been published in India.3 More recently, results from several studies have been reported.4-7 Ramana, et al.8 have reported the characterization of rust phases formed on low carbon steel exposed to a natural marine environment. We made a study on the kinetics of atmospheric corrosion of mild steel (MS), zinc, galvanized iron (GI), and aluminum at 10 exposure stations in India9 and the results were compared with global levels. In continuation of this work, the present program was undertaken and the results obtained on MS, Zn, GI, and Al corrosion in natural atmospheres are reported. The results are discussed as a function of exposure time and pollution levels.

Item Type: Article
Subjects: Corrosion Science and Engineering
Depositing User: ttbdar CECRI
Date Deposited: 20 Jan 2012 12:33
Last Modified: 20 Jan 2012 12:33

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