Keywords
Atmospheric corrosion
electrochemical test
galvanized steel. Acero galvanizado
corrosión atmosférica
pruebas electroquímicas
electrochemical test
galvanized steel. Acero galvanizado
corrosión atmosférica
pruebas electroquímicas
How to Cite
Peña Ballesteros, D. Y., Sandoval Amador, A., Estupiñán Durán, H. A., Sierra Fajardo, D., & Quintero Ascanio, L. (2015). Corrosion behavior of galvanized steel in an atmosphere containing chlorides and sulfates by electrochemical techniques. Informador Tecnico, 79(2), 127–136. https://doi.org/10.23850/22565035.157
Abstract
Corrosion behavior on galvanized steel sheets, immersed in solutions with different concentrations of NaCl and Na2SO4 was studied. The steel sheets were immersed using an elevator, in order to simulate an atmosphere, wherein the sheets were always interacting with corrosive medium. The degradation was evaluated by electrochemical impedance spectroscopy and potentiodynamic curves. The morphology of surface was analyzed by scanning electron microscopy and the composition of the corrosion products was determined by EDX and XRD. The results after 30 days showed that the corrosion potential increased with the time, onfirming the formation of passive products on the surface; corrosion rate also increased, causing pittingcorrosion. For the first few days of exposure, generalized corrosion was observed as a result of compounds passive, porous nature and white.
References
Arenas, M. A., and Damborenea, J. J. (2006). Mecanismo de corrosión e inhibición electroquímica del acero galvanorrecocido . Revista Metalurgia, 165 - 174.
Arias, A. C. (2011). Estudio del comportamiento de un ambiente corrosivo con cloruros y sulfatos, sobre una lámina de acero galvanizado. Universidad Industrial de Santander, Bucaramanga: Trabajo de grado.
ASTM INTERNACIONAL. (2003). Standard test method for determining effects of chemical admixtures on corrosion of embedded steel reinforcement in concrete exposed to chloride environments. ASTM G, 97 - 109.
ASTM INTERNATIONAL. (2010). Standard practice for calculation of corrosión rates and related information from electrochemical measurements. ASTM G 102 - 89.
Echeverría, C. A. (18 de Septiembre de 2002). Monografias: Corrosión atmosférica del acero en condiciones climáticas de Cuba. Influencia del aerosol marino. Recuperado de: umcc.cu/monos/2002/Carlos%20Echeverria.pfd.
Hernández, L., Hernández, L., and Rodriguez, S. (Sem de 2011). Recubrimientos para aumentar la duración del acero galvanizado. Memorias del XVII congreso internacional anual de la somim (págs. 749 - 755). San Luis Potosí: SOMIM.
INTERNACIONAL, A. (2010). Standard practice for conventions applicable to electrochemical measurements in corrosion testing. ASTM G3 - 89.
INTERNATIONAL, A. (2010). Standard test method for conducting potentiodynamic polarización resistance measurements. ASTM G59 - 97.
Seré, P. R., Culcasi, J. D., Elsner, A. R., and Sarli, D. (1997). Factores que afectan a la temperatura de los recubrimientos de cinc obtenido por inmersión. Revista de Metalurgia., 376 - 381.
https://doi.org/10.3989/revmetalm.1997.v33.i6.832
Yadav, A. P., Nishikata, A., and Tsuru, T. (2004). Degradation mechanism of galvanized steel in wet-dry cyclic environment containing chloride ions. Corrosion Science, 165 - 174.
https://doi.org/10.1016/s0010-938x(03)00153-7
Yadav, A. P., Nishikata, A., and Tsuru, T. (2004). Electrochemical impedance study on galvanized steel corrosión under cyclic wet - dry conditions - influence of time of wetness. Corrosion Science, 169 - 181.
Downloads
Download data is not yet available.
