Rajendran, S. and Amalraj, S.J. and Sahayaraj, W. and Rathish, R.J. and Anthony, N. and Palaniswamy, N. (2005) Mutual Influence of HEDP and SDS - Zn2+ System on Corrosion Inhibition of Carbon Steel. Transactions of the SAEST, 40 (1). pp. 35-39.

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Abstract

Rain water running down from the terrace was stored in concrete tanks and used for the study. The inhibition efficiency (IE) of sodium dodecyl sulphate (SDS) in controlling corrosion of carbon steel immersed in rain water in the presence of Zn2+ and 1- hydroxyethane-1,1-diphosphonic acid (HEDP) has been evaluated by weight loss method. SDS accelerates the corrosion rate. SDS-Zn2+ system also accelerates the corrosion rate. Interestingly the SDS-Zn2+-HEDP system shows excellent IE. The SDS (150 ppm) - Zn2+ (50 ppm) system is corrosive. When 50 ppm HEDP is added the IE becomes 80% The HEDP (100 ppm) - Zn2+ (50 ppm) system has only 65% IE. When 100 ppm of SDS is added, IE increases to 93%. The protective film consists of Fe2+-SDS complex, Fe2+-HEDP complex and Zn(OH)2 as revealed by FTIR spectra. The HEDP-Zn2+ system shows good IE. The protective film consists of Fe2+-HEDP complex and Zn(OH)2. Rain water along with these formulations may be used in cooling water systems in various industries.

Item Type:	Article
Uncontrolled Keywords:	Corrosion inhibition; carbon steel; phosphonic acid; surfactant; sodium dodecyl sulphate
Subjects:	Corrosion Science and Engineering
Divisions:	UNSPECIFIED
Depositing User:	TTBD CECRI
Date Deposited:	17 Jan 2012 10:54
Last Modified:	17 Jan 2012 10:54
URI:	http://cecri.csircentral.net/id/eprint/211

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