Some Sulfated Water Soluble Natural Polymer (Carrageenans) Compounds as Corrosion Inhibitors for Dissolution of Iron in Hydrochloride Acid Solution
Chemistry Department, Faculty of Applied Sciences, Umm Al -Qura University, Makkah Al Mukaramha P.O. Box - 118 (Saudi Arabia)
DOI : http://dx.doi.org/10.13005/msri/032a01
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The effect of some sulfated water soluble polymer (carrageenan) compounds on the corrosion behavior of iron electrode in 1M hydrochloric acid solution as corrosive medium has been investigated using galvanostatic polarization technique. Some corrosion parameters such as anodic and catholic Tafel slope, corrosion potential, corrosion current density , surface coverage and inhibition efficiency was calculated. The polarization measurements indicated that the inhibitors are mixed type. The inhibition efficiency was found to increase with increasing concentration and number of sulfer atom per molecules. Inhibition was explained on basis of parallel adsorption of these compounds on the iron electrode. The adsorption process follows Langmuir adsorption isotherm.
KEYWORDS:Iron; corrosion inhibitors; adsorption; Carrageenans compounds
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612 Accepted on: 19 Oct 2006
