title: A comparative study on the electrochemical corrosion behavior of iron and X-65 steel in 4.0 wt % sodium chloride solution after different exposure intervals.
abstract: In this work, the results obtained from studying the anodic dissolution of pure iron and API X-65 5L pipeline steel after 40 min and 12 h exposure period in 4.0 wt % NaCl solutions at room temperature were reported. Potential-time, electrochemical impedance spectroscopy, potentiodynamic polarization, and chronoamperometric current-time at constant potential techniques were employed. It has been found that the iron electrode corrodes in the chloride test solutions faster than the API X-65 5L steel does under the same conditions. Increasing the exposure period for the electrodes from 40 min to 12 h showed a significant reduction in the corrosion parameters for both iron and steel in the 4.0 wt % NaCl solution. Results together confirmed clearly that the X-65 steel is superior to iron against corrosion in sodium chloride solutions.
authors.affiliation: College of Engineering, King Saud University, P.O. Box 800, Al-Riyadh 11421, Saudi Arabia. esherif@ksu.edu.sa.
authors.forename: El-Sayed M
authors.initials: el-SM
authors.lastname: Sherif
mesh_terms: D003343:Corrosion; D004563:Electrochemistry; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D008422:Materials Testing; D012965:Sodium Chloride / Q000737:chemistry*; D012996:Solutions; D013232:Steel / Q000737:chemistry*; D013997:Time Factors
chemical_list: D012996:Solutions; D013232:Steel; D012965:Sodium Chloride; D007501:Iron