Galvanic Corrosion between Depleted Uranium and 40Cr Steel

Abstract:

Individual corrosion and galvanic corrosion behaviors of depleted uranium (DU) and 40Cr steel were investigated by electrochemical analyzing technologies in 3.5w.t%NaCl solution, including open circuit potential(OCP) test, linear polarization(LP) test, potentiodynamic polarizaition(PD) test, galvanic corrosion potential and corrosion current density test. The results reveal that the OCP of DU and 40Cr steel are around -790mV and -660mV, respectively. 40Cr has a higher linear polarization resistance than DU in galvanic corrosion. The dynamic processes of galvanic corrosion goes through an conversion in the whole test period. DU acts as anode with an accelerated corrosion rate, while the 40Cr steel behaves as cathode during the process of galvanic corrosion for DU/40Cr couple. The galvanic potential and current density of the DU/40Cr couple are -780mV and 17.5μA/cm-2, respectively.

• Periodical: Key Engineering Materials (Volumes 531-532)
• Pages: 220-225
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.531-532.220
• Online since: December 2012
• Authors: Zhen Pu, Qing Fu Wang, Mao Bin Shuai, Ding Mu Lang
• Keywords: 40Cr Steel, Depleted Uranium, Galvanic Corrosion

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