Cathodic protection of tin-coated steel in monochloroacetic acid (0.5 mol dm-3) in presence of chromates .and dichromates

Department of Chemistry, Hemchandracharya North Gujarat University, Patan-384 265, Gujarat, India E-mail : smridhee2000@yahoo.co.in Manuscript received 29 January 2008. revised 12 August 2010, accepted 16 August 2010 Potentiostalic weight loss technique has been used to study cathodic protection of steel coated with tin in 0.5 mol dm-3 monochloroacetic acid in presence of alkali metal chromates and dichromates. For complete protection 0.1296 amp/dm2 current is required. The conjoint effect of cathodic current and inhibitors is antagonistic. High polarization and low eurrent density for film formation may be a cause for protection