Corrosion Study of Metals in an Urban Atmosphere

H.K. Kadiya¹ and R.T. Vashi²

¹C. U. Shah Science College, Ashram Road, Ahmedabad - 380 014 (India). 

²Department of Chemistry, Navyug Science College, Surat - 395 009 (India).

DOI : http://dx.doi.org/10.13005/msri/060214

ABSTRACT:

Corrosion rate of mild-steel (MS), zinc and aluminum as well as the sulphonation rate was determined during 2005-2007 under outdoor exposure in an Urban atmosphere at Valsad (Dist. Valsad) situated in South Gujarat, India. Monthly corrosion rate vary from 77 to 824, 19 to 109 and 1.5 to 17.8 mg/sq.dm correspond to MS, zinc and aluminium respectively, whereas the yearly corrosion rate vary from 2575 to 3667, 181 to 459 and 8.3 to 37.2 mg/sq.dm for mild-steel, zinc and aluminium respectively. Monthly corrosion rate was found in the decreasing order : mild steel < zinc < aluminium. Corrosion rate of these three metals was found more in rainy seasons than the rate of winter and summer season. There is a considerable loss of corrosion rate during exposure for one year of mild steel. Monthly corrosion rate of mild steel indicate a close correlationship with rainfall (r = 0.65) and positive correlation with sulphation rate (r = 0.54). No correlation appeared to exist between temperature and corrosion rate of mild steel, zinc and aluminium.

KEYWORDS: Corrosion; urban atmosphere; mild-steel; zinc and aluminum

Copy the following to cite this article: Kadiya H. K, Vashi R. T. Corrosion Study of Metals in an Urban Atmosphere. Mat.Sci.Res.India;6(2)

Copy the following to cite this URL: Kadiya H. K, Vashi R. T. Corrosion Study of Metals in an Urban Atmosphere. Mat.Sci.Res.India;6(2). Available from: http://www.materialsciencejournal.org/?p=3541

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