Evaluation of acid inhibitors under controlled hydrodynamic conditions

Authors

  • V. M. Salinas-Bravo Instituto de Investigaciones Eléctricas. Dpto. Físico-Química Aplicada
  • J. G. González-Rodríguez Instituto de Investigaciones Eléctricas. Dpto. Físico-Química Aplicada

DOI:

https://doi.org/10.3989/revmetalm.1997.v33.i3.861

Keywords:

Rotating cylinder electrode, Mild steel, Corrosion, Hydrochloric acid, Inhibitor, Flow velocity

Abstract


The cylindrical rotating electrode and electrochemical techniques were used to investigate the protection against corrosion of a commercial inhibitor used in hydrochloric acid solutions with and without additions of thiourea and ammonium bifluoride. The corrosion phenomenon was investigated under controlled hydrodynamic conditions. These were chosen to simulate those found in a pipe at different flow velocities. It was found that corrosion of mild steel in hydrochloric acid solutions with inhibitor is mainly controlled by activation, whereas in acid solutions with inhibitor added with thiourea and ammonium bifluoride it is mainly controlled by mass transfer. On the other hand, flow velocity of the acidic solutions affects negatively the efficiency of the inhibitor in the concentration range of 0.2 to 1.0 %.

Downloads

Download data is not yet available.

Downloads

Published

1997-06-30

How to Cite

Salinas-Bravo, V. M., & González-Rodríguez, J. G. (1997). Evaluation of acid inhibitors under controlled hydrodynamic conditions. Revista De Metalurgia, 33(3), 182–186. https://doi.org/10.3989/revmetalm.1997.v33.i3.861

Issue

Section

Technical Notes

Most read articles by the same author(s)