Evaluation of Corrosion T22 and 347H Steel Molten Salt By Electrochemical Techniques

Wednesday, 8 October 2014: 08:40
Expo Center, 1st Floor, Universal 15 (Moon Palace Resort)
A. T. Estrada, J. A. C. Miramontes, P. Z. Robledo, C. G. Tiburcio, and F. A. Calderón (Centro de Investigación e Innovación en Ingeniería Aeronáutica, CIIIA.)

The main applications of the SA213 and SA213-TP347H-T22 steels are in aggressive environments such as molten salts, the concentration of these along with the temperature increase generated in the corrosion rate [1-3].


The electrochemical cell used consists of a working electrode WE1, a reference electrode and an auxiliary electrode RE AU in a molten salt electrolyte consisting of 50% V2O5 - 50% Na2SO4 at 700 ° C.


Current I [mA/cm2] and Potential time series [mV/cm2] were obtained to evaluate the behavior of both steels in time, and determine the type of damage caused by molten salts [1,2]. In Figure 1 two sets of time are shown in current for two types of steel.


Behavior TP347H SA213-SA213-T22 and corrosive attack at high temperature by means of electrochemical noise was evaluated.

The results of electrochemical noise are processed in the frequency domain [4] results acquiring noise impedance Zn.


[1] Almeraya, F., A. Martinez-Villafañe, C. Gaona, M. A. Romero, and J. M. Malo. Revista de metalurgia 34, no. 1 (1998): 11-17.

[2] Tristancho, José Luis, Facundo Almeraya, and José Chacón. Scientia et Technica 3, no. 46 (2010): 163-167.

[3] Wood, Graham C. Oxidation of Metals 2, no. 1 (1970): 11-57.

[4] J. Botana-Pedemonte, A. Aballe-Villero, M. Marcos-Bárcenas. SEPTEM Ediciones, Oviedo  España (2002).