Electrochemical Behaviour of High Stress Steel (AISI 4340) in CO2 Environments with the Presence of H2 Gas

Asmara, Y. P. and Siregar, J. P. and Tezara, C. and Juliawati, Alias (2014) Electrochemical Behaviour of High Stress Steel (AISI 4340) in CO2 Environments with the Presence of H2 Gas. Applied Mechanics and Materials, 695. pp. 98-101. ISSN 1662-7482. (Published)

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Abstract

This research studied effects of CO2 and H2 gases on electrochemical behaviour of high stress steel (HSS) by using scan polarization graph to measure corrosion rate, corrosion potential and pitting potential. The tensile test samples with and without notches were tested under constant stress of 20% and immersed in 3% NaCl solutions. During experiments, CO2 gas was injected into the samples. To generate H2 gas, the samples were employed cathodically over potential at - 1700 mV (Ag/AgCl) for three days. The results indicated that both CO2 and H2 gases have increased the corrosion rate. Potentiodynamic graph showed that there were changes in pitting potential where the effect of CO2 gas would decrease the pitting potential. However,the presence of the notch did not show any significant difference in corrosion rate.

Item Type:	Article
Uncontrolled Keywords:	High Stress Steel, Polarization Diagram, Stress Corrosion Cracking
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TP Chemical technology
Faculty/Division:	Faculty of Mechanical Engineering
Depositing User:	Dr. Yuli Panca Asmara
Date Deposited:	21 Oct 2014 03:24
Last Modified:	14 Feb 2018 06:32
URI:	http://umpir.ump.edu.my/id/eprint/6726
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