The most widely issue in oil fields that affects both production and the environment is corrosion. Dual cationic
surfactants entitled (CS-8 & CS-12) were chemically verified via IR,
1
HNMR, mass spectra, and
13
C NMR tech
niques, then tested as corrosion mitigators for carbon steel (G10300-CS) immersed in high acidic solution (2 M
HCl). The surface tension and conductivity measurements showed the ability of the examined surfactants in
suppression water surface tension to 25.91 mN/m and 24.22 mN/m at room temperature with the injection of
CS-8 and CS-12 respectively. The anticorrosion impact of the examined CS-8, and CS-12 inhibitors was inves
tigated using EIS (electrochemical impedance spectroscopy) and PDP (potentiodynamic polarization) measure
ments, exhibiting the inhibition performance of the prepared CS-8 and CS-12. The addition of studied inhibitors
enhanced the G10300-CS corrosion resistance till reach 792.859 Ω.cm
2
and 989.077 Ω.cm
2
8 and CS-12 sequentially, compared with that of blank solution was 48.106 Ω.cm
2
3
at 1 × 10
3
M for CS-
which verified G10300-CS
protection with inhibition efficacy 93.93% and 95.14%. Also, the adsorption film stability onto G10300-CS
surface was evaluated using ML (mass loss) at various harsh conditions as high temperature levels and long
immersion times which reflected the mitigation competence enhanced with time till touch about 95% and 97% at
1 × 10
M of CS-8 and CS-12 after 24 h, which can be explained by their adsorption onto G10300-CS surface
following Langmuir adsorption isotherm. In addition, the exposed surface of G10300-CS was studied prior to and
following the CS-8 and CS-12 injection utilizing scanning electron microscopy (SEM) and energy dispersive X-ray
spectroscopy (EDX), and Atomic Force Microscope (AFM) analysis. Finally, the obtained quantum chemical
calculations proved the inhibition power of the studied CS-8 and CS-12 and supported the obtained experimental
results. |
