Response surface methodology and experimental evaluation of the inhibitory properties of corn leaf extract for aluminum corrosion in acid media

被引:4
作者
Emereole, Justin C. [1 ]
Njoku, Chigoziri N. [1 ,2 ]
Ikeuba, Alexander I. [3 ]
Ekeke, Ifenyinwa C. [4 ]
Yakubu, Emmanuel [4 ]
Nkuzinna, Ogbonna C. [4 ]
Nnodum, Nnamdi A. [5 ]
Nwakaudu, Madueke S. [4 ]
机构
[1] Fed Univ Technol Owerri, Dept Chem Engn, Environm Composite & Optimizat Res Grp, Owerri, Nigeria
[2] Fed Univ Technol Owerri, Africa Ctr Excellence Future Energies & Electroche, Owerri, Nigeria
[3] Univ Calabar, Dept Pure & Appl Chem, Mat Chem Res Grp, Calabar, Nigeria
[4] Fed Univ Technol Owerri, Dept Chem Engn, Owerri, Nigeria
[5] Fed Univ Technol Owerri, Dept Mat & Met Engn, Owerri, Nigeria
关键词
Corrosion; Aluminum; Mass loss measurement; Adsorption; Response surface methodology; MILD-STEEL CORROSION; ELECTROCHEMICAL EVALUATION; CARBON-STEEL; OPTIMIZATION; KOLA;
D O I
10.1108/ACMM-03-2024-2988
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
PurposeThis study aims to develop eco-friendly corrosion inhibitors for aluminum in acidic media by evaluating the corrosion inhibition properties of corn leaf extract (CLE) using response surface methodology (RSM) and experiments.Design/methodology/approachThe RSM was combined with experiments to evaluate the corrosion inhibition properties of CLE on aluminum in acid media.FindingsThe effectiveness of the inhibition increased with increasing inhibitor concentration and time but decreased with increasing temperature. The corrosion inhibition mechanism revealed the corrosion process is spontaneous exothermic physical adsorption. Thermodynamic parameters revealed an activation energy between 32.1 and 24.7 kJ/mol, energy of adsorption between -14.53 and -65.07 and Gibbs free energy of -10.12 kJ/mol which indicated the CLE exothermically spontaneously physisorbed. A model was generated to estimate the effect of the process parameters (inhibitor concentration, reaction time and temperature) using the RSM. Optimization of the process factors was also carried out using the RSM. The percentage inhibition efficiency obtained experimentally (85.61%) was closely comparable to 84.89% obtained by the theoretical technique (RSM). The SEM observations of the inhibited and uninhibited Al samples demonstrated that CLE is an effective corrosion inhibitor for aluminum in acid media.Originality/valueResults herein provide novel information on the possible application of CLEs as effective eco-friendly corrosion inhibitors.
引用
收藏
页码:593 / 605
页数:13
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