The plasma sprayed Yttria stabilized thermal barrier coating electrochemical behavior was LQYHVWLJDWHG LQ DUWL¿FLDO VHD ZDWHU E\ /LQHDU 3RODUL]DWLRQ 5HVLVWDQFH /35 2SHQ &LUFXLW 3RWHQWLDO DQG Electrochemical Impedance Spectroscopy (EIS) methods at room temperature. Thermal properties of applied coating after 600 hours exposure in 3.5% NaCl solution demonstrated 0.5% weight loss at about constant KHDWÀRZUDWHRIZDWWJPXSWR&IROORZHGE\UHJDLQLQZHLJKWDW&GXHWRHQGRWKHUPLFUHDFWLRQ
7KHLQLWLDOZHLJKWORVVDWFRQVWDQWKHDWÀRZZDVDWWULEXWHGWRVWDELOL]DWLRQRIFRDWLQJ7KHHOHFWURFKHPLFDO analysis revealed that the open circuit potential became positive after 600 hours compared to 0 hour with decrease in polarization resistance. The 28% decrease in charge density after 600 hours exposure in 3.5% NaCl solution was in support to decrease in polarization resistance. The decrease in charge transfer resistance
was attributed to the ingress of chloride ions at the coating metal interface and localized corrosion reactions DWWKHR[LGH¿OP
K. M. Deen, M. Farooq, S. Alam, R. Ahmad, A. Imran. (2012) Electrochemical Behavior of Yttria Stabilized Thermal Barrier &RDWLQJRQ0LOG6WHHOLQ$UWL¿FLDO6HD:DWHU, , Volume 49, Issue 4.
