Evaluation of a nitrite base inhibitor in demineralized water at 55°C at low concentrations.
Español
Abstract
Sodium nitrite has been used for many years to inhibit water corrosion of metals. By functioning as an anodic inhibitor, sodium nitrite oxidizes ferrous ions to ferric ions on iron and steel surfaces to produce a very thin cling film of ferric oxide on anodic areas. In the present study, the electrochemical behavior of a nitrite-based inhibitor is evaluated, in demineralized water, in a structural steel with 0.21% C, in the range of 0 to 800 ppm of nitrites (0.44, 0.88, 1.76, 3.52 and 5.28 ml / l of Inhibitor) at 55 ° C, by means of resistance to polarization (Rp) and polarization curves techniques. The results show that the presence of the inhibitor reduces the corrosion rate, reaching a maximum of 0.88 ml / l but increases again slightly in the presence of more inhibitor.
Downloads
References
Arganis Juárez C. R., Zenteno Suárez J.C., and Cárdenas F. (2019). Determinación de la dosificación de un inhibidor base nitritos en agua desmineralizada a 55°C en acero al carbono mediante técnicas electroquímicas y pérdida de peso. 34 congreso nacional de la sociedad mexicana de electroquímica SMEQ, Querétraro, Queretaro México.
Beecher J., Dinkel C. and Corwin S. (1959) Corrosion Inhibition with Sodium Nitrite, Journal American Water Works Association, Vol. 51, No. 9 1175-1180.
Cottis R. , Turgoose S. (1999) Corrosion Testing Made Easy. Electrochemical Impedance and Noise. Syrett B.C. Editor. NACE.
Eden D. A. and Rothwell A.N (1992) Corrosion 92 the NACE Annual Conference and Corrosion Show. , Paper No. 292. Electrochemical Noise data: Analysis interpretation and presentation Houston Texas USA
Farooqi I.H., Saini P.A. , Quraishi M A. (2000) Recent Trends In Cooling Water lnhibitors, Corrosion 2000, Paper No. 00332, NACE, Houston Texas USA.
Hayyan M., Sameh S. A. , Hayyan A., AlNashef I. M. (2012) Utilizing of Sodium Nitrite as Inhibitor for Protection of Carbon Steel in Salt Solution, Int. J. Electrochem. Sci. 7, 6941 – 6950
Joseph C.P. (1971). Third Eur. Symp. Corr. Inhibitor, University of Ferrara, P.791 .
Mansfield F. And Sun Z. (1999) Technical Note: Localization Index Obtained from Electrochemical Noise Analysis. Corrosion Vol. 55, No. 10 pp. 915-918, DOI: /10.5006/1.3283926
Matsuda S. and. Uhlig H. H. (1964). Effect of pH, sulfates, and chlorides on behavior of sodium chromate and nitrite as passivators for steel J. of Electrochem. Soc., 111, 156-161.
Mercer A. D. Jenkins, I.D. and Rhoades-Brown J.E. (1968). , Comparative study of factors influencing the action of corrosion inhibitors for mild steel in neutral solution: III. Sodium nitrite Br. Corr. J., 3, 136-144.
DOI: 10.1179/000705968798326217
Suez water technologies & solutions. (2021) Handbook of Industrial Water Treatment. Suez water Technologies & Solutions. https://web.archive.org/web/20210623212126/https://www.suezwatertechnologies.com/handbook/chapter-32-closed-recirculating-cooling-systems.
Viswanathan S.S.,(2010) Contemporary Developments in Corrosion Inhibitors - Review of Patents. Recent Patents on Corrosion Science 2, 6-12. DOI:10.2174/1877610801002010006
