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. 2021 May 18;11(1):10521.
doi: 10.1038/s41598-021-90031-x.

Inhibitory influence of cationic Gemini surfactant on the dissolution rate of N80 carbon steel in 15% HCl solution

M A Deyab  1 , Q Mohsen  2
Affiliations

Inhibitory influence of cationic Gemini surfactant on the dissolution rate of N80 carbon steel in 15% HCl solution

M A Deyab et al. Sci Rep. .

Abstract

Strong acids are commonly used in petroleum wells to remove scale layers from the surface of N80 C-steel pipe. The corrosive effects of these acids, on the other hand, pose a significant risk to C-steel pipes. For the first time, we discovered the anti-corrosion properties of cationic Gemini surfactant, 1,2-bis(dodecyldimethylammonio) ethane dibromide (DMAEB), for N80 C-steel pipe in acid washing solution (15.0% HCl). The DMAEB, in particular, can reduce the corrosion rate of N80 C-steel by approximately 97%. DMAEB molecules work as a mixed-type corrosion inhibitor, according to electrochemical results. The DMAEB demonstrated a high inhibition effect at high temperatures, as well as high activation energy against the corrosion process. DMAEB's significant performance is primarily due to physical adsorption on the N80 C-steel surface, as confirmed by adsorption isotherms, SEM, EDX, FT-IR, and theoretical studies. Our findings shed new light on the use of Gemini surfactants as corrosion inhibitors in petroleum wells.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
Molecular structure of 1,2-bis(dodecyldimethylammonio) ethane dibromide (DMAEB).
Figure 2
Figure 2
Variation of the surface tension with concentrations of DMAEB at 303 K.
Figure 3
Figure 3
Polarization curves of N80 C-steel pipe in 15.0% HCl solution without (blank) and with DMAEB at 303 K.
Figure 4
Figure 4
Comparison of inhibition efficiency% values obtained from mass loss and polarization methods.
Figure 5
Figure 5
Schematic illustration of inhibition mechanism of DMAEB for N80 C-steel corrosion in 15.0% HCl solution.
Figure 6
Figure 6
Arrhenius plot for N80 C-steel pipe in 15.0% HCl solution without and with 100 mg/l DMAEB.
Figure 7
Figure 7
Langmuir isotherm plot for N80 C-steel pipe in 15.0% HCl solution containing 100 mg/l DMAEB at 303 K.
Figure 8
Figure 8
(a) SEM image and (b) EDX spectra for N80 C-steel pipe after immersion in the blank solution (15.0% HCl).
Figure 9
Figure 9
(a) SEM image and (b) EDX spectra for N80 C-steel pipe after immersion in the inhibited solution (15.0% HCl + 100 mg/l DMAEB).
Figure 10
Figure 10
FT-IR spectra of pure DMAEB and film formed on the surface of N80 C-steel in the inhibited solution (15.0% HCl + 100 mg/l DMAEB).
Figure 11
Figure 11
(a) HOMO, (b) LUMO and (c) total electron density distribution for DMAEB molecule. "Computational results obtained using software programs from Accelrys Software Inc. The ab initio calculations were performed with the DMol3 program, and graphical displays generated with Materials Studio".
See this image and copyright information in PMC

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