Protection for galvanized steel in 3.0 % NaCl solution by SG/CTAB
Rachid Touir, Hayat Larhzil, Mohammed Ebn Touhami
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Protection for galvanized steel in 3.0 % NaCl solution by SG/CTAB
Rachid Touir, Hayat Larhzil, Mohammed Ebn Touhami
Informazioni sul libro
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.