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New Journal of Chemistry
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Acknowledgements
This work was supported by the DKOeI:y10.1R0e39se/Ca9rNchJ033a3n6dJ
Development
Program
of
Shandong
Province
(2019GSF108089), the Natural Science Foundation of
Shandong Province (ZR2019MB009), the National Natural
Science Foundation of China (21672046, 21372054), and the
Found from the Huancui District of Weihai City.
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Notes and references
Figure 16 Schematic illustration of the adsorption mechanism of DMU and Tween-80
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M. Prabakaran, S. H. Kim, V. Hemapriya and I. M. Chung, Res.
Chem. Intermed., 2016, 42, 3703-3719.
I.B. Obot, S. A. Umoren and N. K. Ankah, J. Mol. Liq., 2019,
277, 749-761.
P. Singh, V. Srivastava and M. A. Quraishi, J. Mol. Liq., 2016,
216, 164-173.
E. E. F. El-Sherbini, S. M. Abd-El-Wahab and M. A. Deyab,
Mater. Chem. Phys., 2003, 82, 631-637.
W. W. Zhang, H. J. Li, M. R. Wang, L. J. Wang, A. H. Zhang and
Y. C. Wu, New J. Chem., 2019, 43, 413-426.
M. Mahdavian and S. Ashhari, Electrochim. Acta, 2010, 55
1720-1724.
S. K. Saha, A. Dutta, P. Ghosh, D. Sukul and P. Banerjee, Phys.
A. S. Fouda, M. A. Ismail, A. M. Temraz and A. S. Abousalem,
S. K. Saha and P. Banerjee, Mater. Chem. Front., 2018, 2,
1674-1691.
on mild steel surface.
steel to form a negative electric region, and then the
protonated DMU/Tween-80 molecule would have electrostatic
adsorption (physical adsorption) with the negative steel
surface, forming a protective film to inhibit the anodic
dissolution of iron. Also, the negative charge on the carbonyl
group on DMU interacts with the positively charged metal
surface (free space uncovered by Cl-) and forms the DMU
monolayer, and the cationic group of DMU monolayer
interacts with the heteroatoms present in Tween-80 and forms
the bilayer of inhibitor.29 Thus this bilayer inhibitor contributes
more inhibition when it is adsorbed on mild steel than the
inhibition of DMU alone in acidic medium. On other hand, the
lone pair electrons in heteroatoms (N/O) can enter the empty
d-orbital of iron atoms to form coordination bonds for
chemisorption, which slows down the corrosion reaction. In
addition, Tween-80 is a macromolecule and DMU is a small
molecule, When DMU is compounded with Tween-80, the
small molecule of DMU can be inserted into the gap of Tween-
80 to form a complementary double layer network structure,
so that their active groups can best play a synergistic effect.
,
10 S. K. Saha, M. Murmu, N. C. Murmu and and P. Banerjee, J.
Mol. Liq., 2016, 224, 629-638.
11 A. S. Fouda, A. A. Al-Sarawy and E. E. El-Katori, Desalination,
2006, 201, 1-13.
12 K. Azzaoui and E. Mejdoubi, et al, Corrs. Sci., 2017, 167, 59-
69.
13 S. A. Umoren, I. B. Obot, A. Madhankumar and Z. M. Gasem,
Carbohyd. Polym., 2015, 124, 280-291.
14 M. Messali, H. Lgaz, R. Dassanayake, R. Salghi, S. Jodeh, N.
Abidi and O. Hamed, J. Mol. Struct., 2017, 1145, 43-54.
15 L. Afia, R. Salghi, L. Bammou, E. Bazzi, B. Hammouti, L. Bazzi
and A. Bouyanzer, J. Saudi. Chem. Soc., 2014, 18, 19-25.
16 M. M. Solomon, H. Gerengi, T. Kaya and S. A. Umoren, Int. J.
Biol. Macromol., 2017, 104, 638-649.
Conclusions
In this work, 1-(2,5-dioxoimidazolidin-4-yl)urea was
synthesized from urea and glyoxylic acid under mild reaction
conditions, and its corrosion inhibition for mild steel in acidic
solution was studied. Based on the experimental analysis, the
following conclusions are drawn:
(1) DMU is found to behave as an anode-based mixed
inhibitor, which moderately inhibits the corrosion of mild
steel in HCl solution.
(2) The inhibition efficiency of DMU increases with the
increase of concentration and temperature. A synergistic
inhibition effect between DMU and Tween-80 is observed,
and the adsorption on steel surface follows Langmuir
adsorption isotherm.
(3) Surface morphology by SEM and SECM confirmed the
synergistic inhibition effect between DMU and Tween-80.
(4) Density functional theory and MD simulation analysis
supports the fact that both the neutral and protonated
forms of DMU can inhibit the corrosion of mild steel in HCl
solution.
17 R. Oukhrib, B. E. Ibrahimi, H. Bourzi, K. E. Mouaden, A. Jmiai,
S. E. Issami, L. Bammou and L. Bazzi, JMES, 2017, 8, 195-208.
18 H. X. Jia, Z. D. Guo, X. Z. Li, Z. Wang and L. Jia, Shandong
Chem. Ind., 2015, 44, 46-47.
19 Y. C. Fu, L. H. Ferng and P. Y. Huang, Food Chem., 2006, 94
,
541-549.
20 Y. F. Wang and Z. Yang, et al, New J. Chem., 2018, 42, 12977-
12989.
Sci., 2019, 146, 134-151.
Lin, J. Alloy. Compd., 2017, 712, 121-133.
23 I. B. Obot and U. M. Edouk, J. Mol. Liq., 2017, 246, 66-90.
24 A. Yousefi, S. Javadian and J. Neshati, Ind. Eng. Chem. Res.,
2014, 53, 5475-5489.
25 M. Mobin, M. Parveen and M. Z. A. Rafiquee, J. Mater. Eng.
Perform., 2013, 22, 548-556.
26 W. W. Zhang, R. Ma, H. H. Liu, Y. Liu, S. Li and L. Niu, J. Mol.
Liq., 2016, 222, 671-679.
27 N. S. Ayati, S. Khandandel, M. Momeni, M. H. Moayed, A.
Davoodi and M. Rahimizadeh, Mater. Chem. Phys., 2011, 126
873-879.
,
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