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Article
EFFECT OF TEMPERATURE ON CORROSION OF CARBON STEELBOILER TUBES IN DILUTE SODUIM CHLORIDE SOLUTION

Authors: D.R. Rzaige --- G.A. Rassoul
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2008 Volume: 9 Issue: 3 Pages: 33-35
Publisher: Baghdad University جامعة بغداد

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Abstract

The corrosion behavior of carbon steel at different Temperatures and in water containing different sodium chloride concentrations under 3 bar pressure has been investigated using weight loss method . The carbon steel specimens were immersed in water containing (100,400,700,1000PPM) of NaCl solution and under temperature was increased from (90-120ºC) under pressures of 3 bar. The results of this investigation indicated that corrosion rate increased with NaCl concentrations and Temperature.


Article
Corrosion Inhibition of Aluminum Alloy in 50% Ethylene Glycol Solution

Authors: Baseem H. EsSebbagh --- Dhia El-Din M. Kassim --- G. A. Rassoul
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2007 Volume: 8 Issue: 3 Pages: 53-59
Publisher: Baghdad University جامعة بغداد

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Abstract

The present study was conducted to evaluate the effect of different inhibitors on the corrosion rate of aluminum in 50% (v/v) ethylene glycol solution at 80°C and pH 8.0 in which the electrochemical technique of linear sweep voltammetry was employed to characterize each inhibitor function and to calculate the corrosion rate from Tafel plots generated by a computer assisted potentiostat.It is found that both sodium dichromate and borax reduces the corrosion rate by polarizing the anodic polarization curve while sodium phosphate, potassium phosphate, and sodium berizoate reduces the corrosion rate by polarizing both the anodic and cathodic polarization curve.When inhibitor concentration increases from 1 g/l up to 3 g/l. the inhibitor efficiency increases from 50% up to 85% for borax, from 64% up to 71%for sodium dichromate, and from 66% up to 82% for sodium phosphate, while constant inhibitor efficiency of about 55% and 50% for potassium phosphate and sodium benzoate were obtained respectively.

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