Protection for galvanized steel in 3.0 % NaCl solution by SG/CTAB

ISBN-13: 9783659963926 / Angielski / Miękka / 2016 / 52 str.

Rachid Touir; Hayat Larhzil; Mohammed Ebn Touhami

Opis

In this book, the influence of Sodium Gluconate (SG), Cetyltrimethylammonium Bromide (CTAB) and their mixture on galvanized steel corrosion in 3.0 % NaCl solution was investigated by using electrochemical measurement coupled with Scanning Electron Microscopy (SEM). The polarization measurements indicated that SG, CTAB and their mixture acted as cathodic-type inhibitors. Indeed, a synergistic effect was found between SG and CTAB. In fact, the inhibition efficiency of the mixture reached 94 % at 10-3 M of SG with 2.74×10-5 M of CTAB. In addition, this inhibition efficiency improved remarkably with immersion time and slightly decreased with temperature. The SEM observations and energy dispersive X-ray (EDAX) analysis indicated that the surface homogeneity increased with mixture addition. Finally, the thermodynamic parameters ( G a, H a, S a) were determined and discussed.

O autorze

RACHID TOUIR Professor of didactics of chemistry and physics at CRMEF Rabat, Morocco, I have published more than 65 papers in international journals and three patents. I have presented several conferences. I am reviewer member in several journals. I have supervised numerous Ph.D. and M.A. theses