Performance and computational studies of two soluble pyran derivatives as corrosion inhibitors for mild steel in HCl

被引:91
作者
Khattabi, M. [1 ]
Benhiba, F. [1 ]
Tabti, S. [2 ]
Djedouani, A. [3 ,4 ]
El Assyry, A. [5 ,6 ]
Touzani, R. [7 ]
Warad, I [8 ,9 ]
Oudda, H. [1 ]
Zarrouk, A. [10 ]
机构
[1] Ibn Tofail Univ, Fac Sci, Lab Separat Proc, Kenitra, Morocco
[2] Univ Mohamed El Bachir El Ibrahimi El Anasser Bor, Fac Sci & Technol, Lab Elect Mat & Syst, Dept Sci & Mat, El Anasser 34000, Algeria
[3] Univ Constantine 1, Lab Physicochim Analyt & Cristallochim Mat Oragan, Constantine 25000, Algeria
[4] Ville Univ Ali Mendjeli, Ecole Normale Super Constantine, Constantine 25000, Algeria
[5] Ibn Tofail Univ, Dept Phys, Lab Optoelect Phys Chem Mat & Environm, FS, PB 133, Kenitra 1400, Morocco
[6] Univ Hassan 2, LPPPC, FS Ben MSik Casablanca, Dept Phys, Casablanca, Morocco
[7] Mohammed Premier Univ, Fac Sci, Lab Appl Chem & Environm, LCAE,COSTE, BP 717, Oujda 60000, Morocco
[8] AN Najah Natl Univ, Dept Chem, POB 7, Nablus, Palestine
[9] Qatar Univ, Dept Chem & Earth Sci, POB 2713, Doha, Qatar
[10] Mohammed V Univ, Fac Sci, Lab Mat Nanotechnol & Environm, Av Ibn Battouta,POB 1014, Rabat, Morocco
关键词
Mild steel; Pyran derivatives; Acid corrosion; SEM/EDS; Theoretical study; COPPER CORROSION; CARBON-STEEL; SCHIFF-BASE; ADSORPTION BEHAVIOR; IRON CORROSION; IONIC LIQUIDS; ACIDIC MEDIA; N80; STEEL; EFFICIENCY; DISCOVERY;
D O I
10.1016/j.molstruc.2019.06.070
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The present study is aiming to explore the effect of 4-Hydroxy-6-methyl-3-(3-quinolin 8 yl acryloyl)pyran-2-one (HMQP) and 3-[3-(4-Dimethylamino-phenyl)-acryloyl]-4-hydroxy-6-methyl-pyran-2-one (DMPHP) on mild steel (MS) corrosion in acid solution (1 M HCI). The compound was tested at various concentrations (0.001-1 mM) and four temperatures (298, 308, 318, and 328 K) to determine the optimal concentration and temperature range for the best corrosion inhibiting effect. In evaluating the inhibition efficiency, weight loss measurement, potentiodynamic polarization measurement (PDP), electrochemical impedance spectroscopy, SEM/EDS and theoretical methods were used. The inhibition efficiencies increase with increase in concentration and decreases with temperature. The maximum inhibition efficiency was found 90% and 85.4% at 298 K in the presence of 1 mM of DMPHP and HMQP respectively. The experimental adsorption data obeyed the Langmuir isotherm model. The polarization parameters suggest that DMPHP and HMQP are mixed type inhibitors. The results of the EIS study suggest that these compounds inhibit corrosion by adsorption mechanism. A good correlation between theoretical and experimental results was obtained. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码:231 / 244
页数:14
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