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97412 THE CORROSION PERFORMANCE OF HIGH CHROMIUM STAINLESS STEELS AND TITANIUM ALLOYS AT A REVERSE OSMOSIS PLANT IN ARABIAN GULF SEAWATER

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Product Number: 51300-97412-SG
ISBN: 97412 1997 CP
Author: A. Al-Odwani, M. Al-Tabatabaei, J. Carew, A. Al-Hashem
Industries: Materials Selection and Design , Oil and Gas Production
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Electrochemicral impedance spectroscopy (EIS) was used to evaluate the corrosion performance of four high chromium stainless steels and Grade 2 titanium in flowing Arabian Gulf natural seawater. The EIS provided information concerning the changes to the interracial impedance as a function of exposure time for these alloys. The impedance spectra for all the alloys showed slight changes at the low frequency region over the exposure period. The open-circuit potentials (OCP) of these alloys were also monitored as a function of exposure time. The stainless steel alloys efilbited slight fluctuation in potential around the initial exposure potential. However, Grade 2 titanium initial potential was more active and then gradually shifted towards the noble direction. The linear polarization resistance (LPR) method indicated that Grade 2 titanium exhibited the lowest corrosion rate with respect to the stainless steel alloys. The results of the EIS analysis and OCP indicated that Grade 2 titanium performed better than the four high chromium stainless steel alloys. Key Words: Electrochemical impedance, Open-Circuit Potential, Seawater, Stainless Steels, Titanium.
Electrochemicral impedance spectroscopy (EIS) was used to evaluate the corrosion performance of four high chromium stainless steels and Grade 2 titanium in flowing Arabian Gulf natural seawater. The EIS provided information concerning the changes to the interracial impedance as a function of exposure time for these alloys. The impedance spectra for all the alloys showed slight changes at the low frequency region over the exposure period. The open-circuit potentials (OCP) of these alloys were also monitored as a function of exposure time. The stainless steel alloys efilbited slight fluctuation in potential around the initial exposure potential. However, Grade 2 titanium initial potential was more active and then gradually shifted towards the noble direction. The linear polarization resistance (LPR) method indicated that Grade 2 titanium exhibited the lowest corrosion rate with respect to the stainless steel alloys. The results of the EIS analysis and OCP indicated that Grade 2 titanium performed better than the four high chromium stainless steel alloys. Key Words: Electrochemical impedance, Open-Circuit Potential, Seawater, Stainless Steels, Titanium.
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