| 000 | 02629cam a2200337 a 4500 | ||
|---|---|---|---|
| 003 | EG-GiCUC | ||
| 005 | 20250223031259.0 | ||
| 008 | 150817s2013 ua d f m 000 0 eng d | ||
| 040 |
_aEG-GiCUC _beng _cEG-GiCUC |
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| 041 | 0 | _aeng | |
| 049 | _aDeposite | ||
| 097 | _aM.Sc | ||
| 099 | _aCai01.12.11.M.Sc.2013.Ma.I | ||
| 100 | 0 | _aMarwa Mahmoud Ahmed Ali Alqutt | |
| 245 | 1 | 0 |
_aImproving the corrosion resistance of metal surfaces used in petroleum industry / _cMarwa Mahmoud Ahmed Ali Alqutt ; Supervised Ahmed Galal , Bahgat Elanadouly |
| 246 | 1 | 5 | _aتحسين مقاومة أسطح الفلزات المستخدمة في مجال صناعة البترول ضد التآكل |
| 260 |
_aCairo : _bMarwa Mahmoud Ahmed Ali Alqutt , _c2013 |
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| 300 |
_a176 P. : _bcharts ; _c25cm |
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| 502 | _aThesis (M.Sc.) - Cairo University - Faculty of Science - Department of Physical Chemistry | ||
| 520 | _aMetal substrates that are used in oil and gas transportation pipeline made from carbon steel grade API-5L X52 with composition from a maximum of 0.28, 1.25, 0.03 and 0.03 wt % of carbon, magnesium, phosphorus and sulfur, respectively (balance in iron) are examined in citrate and phosphate buffers in pH range 4.0 to 6.5 before and after coating the substrate with silica gel film prepared by Sol Gel method and in absence and presence of chloride ions. The electrochemical behavior of the electrode made of the alloy was tested using open circuit potential, Tafel polarization, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurements. The surface was examined using field emission scanning electron microscopy (FE-SEM). The electrochemical measurements showed that the corrosion rate increases with decrease of pH of citrate buffer, while tests in phosphate buffer showed a reversed behavior which attributed to the corrosion inhibition characteristic of the phosphate ions. The metal substrate also tested after coating with different formulations of silica coating prepared by sol gel method, and the electrochemical, measurements showed a decrease of general corrosion rate of coated substrate with respect to bare substrate, but only the coating prepared by sol gel partial hydrolysis method can protect the surface from pitting corrosion | ||
| 530 | _aIssued also as CD | ||
| 653 | 4 | _aAPI-5L X52 | |
| 653 | 4 | _aCarbon Steel | |
| 653 | 4 | _aPhosphate Buffer | |
| 700 | 0 |
_aAhmed Galal, _eSupervisor |
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| 700 | 0 |
_aBahgat Elanadouly , _eSupervisor |
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| 856 | _uhttp://172.23.153.220/th.pdf | ||
| 905 |
_aAml _eCataloger |
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| 905 |
_aNazla _eRevisor |
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| 942 |
_2ddc _cTH |
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| 999 |
_c52026 _d52026 |
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