| Title |
A Study on the Flow Accelerated Corrosion of Carbon Steel Piping Material Using High Temperature Rotating Cylinder Electrode |
| Authors |
김상현(Sang Hyun Kim); 김인섭(In Sup Kim) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Flow Accelerated Corrosion; High Temperature Rotating Cylinder Electrode; Carbon Steel; High Temperature Corrosion |
| Abstract |
Flow accelerated corrosion behavior of carbon steel piping material in the temperature range of 150℃ to 270℃ was studied using high temperature rotating cylinder electrode (HTRCE). Electrochemical corrosion potential (ECP) and current density were measured as a function of temperature and rotating speed using potentiodynamic method. ECP values dropped at the rate of -1.51 mV/℃, which is attributed to the formation of magnetite on steel surface. The ECP shifted upward in all temperature ranges with increasing rotating speed of the RCE. This shift may be attributed to the diffusion enhancement of oxidizing agent. From the velocity exponent of the cathodic half-cell current density on the steel surface, it was evident that a mass transfer process first dominated the corrosion reaction at 150℃, and then an activation process controlled the corrosion kinetics with increasing temperature. |