Mohamed Aly Mostafa Farag <br/><br/>
Corrosion of welded pipes in H₂S, CO₂ solution /  
 تآكل انابيب الغاز فى محاليل تحتوى على كبريتيد الهيدروجين او ثانى اكسيد الكربون 
Mohamed Aly Mostafa Farag ; Supervised Saad Megahed Al Raghy , Randa Mohamed Abdel-Karim , Hafez Abdel-Azim Ahmed 
 - Cairo :   Mohamed Aly Mostafa Farag ,   2015 
 - 77 P. :   charts , facsimiles , photographs ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Metallurgical Engineering 
<br/><br/> Corrosion behavior of welded API X-52 pipe as well as base metal were studied for two working conditions (stressed&unstressed)in the following solutions: NS4 solution, NS4+(5%CO₂,95%N2), NS4+Na2Swith concentrations(0.4,2,4,10mMole/liter). The results showed that stressed specimen had higher corrosion rate than unstressed one. The corrosion rate obtained in NS4+ 5%CO₂ was lower than that in NS4 solution. The corrosion rate obtained in NS4+0.4mMNa2S was higher than that in NS4. Increasing Na₂S to 2mMole/liter, led to decrease the corrosion rate significantly, then a slight increase in corrosion rate was obtained at higher concentrations of Na₂S 
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<br/><br/><label>Subjects--Index Terms: </label>CO2(carbon dioxide) H2S(hydrogen sulfide) Na2S (sodium sulfide)