TY - JOUR ID - TI - Polarographic Studies for the Corrosion of Carbon Steel in Hydrochloric Acid Solutions AU - Elham M. Al-Rufaie PY - 2015 VL - 20 IS - 86 / علمي SP - 929 EP - 938 JO - journal of the college of basic education مجلة كلية التربية الاساسية SN - 18157467 27068536 AB -

The present work deals with the quantitative corrosion determination of carbon steel in hydrochloric acid by the use of polarographic and weight loss technique.The polarographic peak obtained at (-0.27 v) in 0.1 M hydrochloric acid was used for the determination of iron and a calibration was ranged (10-5–10-3) M.To confirm the obtained results a weight loss measurement were carried out, its results are in good agreement with that of the polarographic measurements. The research included in addition to that a kinetic study of corrosion reactions of iron in hydrochloric acid. Reaction rates were calculated at different temperature, and apparent energies of activation have been calculated from corrosion rates and Arrhenius plots.Keywords: polarography, corrosion, carbon steel, and weight loss.Introduction:Corrosion of metals has been observed in many ways by many workers(1–5) and numbers of organic and inorganic compounds were known to inhibit the corrosion of metals and hence are extensively used (6 –11).Several polarographic methods have been used for the determination (12) and micro determination (13).Corrosion studies by polarographic technique where ever possible, simple, sensitive and rapid method, yield highly reliable and reproducible results with a high order of accuracy.This paper describes a differential pulse polarographic determination of iron in 0.1 M hydrochloric acid solutions and a measurement of the peak obtained at -0.27 volt were used.A detailed kinetic study of corrosion reactions of carbon steel in different concentrations of hydrochloric acid solutions of (0.5 – 3) M, metal dissolution rate were calculated over the temperature range (300 – 318) K by the weight loss method. ER -