Walnut (Juglans regia L.) fruit septum alcoholic extract as cor-rosion inhibitor for Fe B500B steel bars in mixed acidic solution

被引：1

作者：

Lame, Alketa ^{[1
]}

Farruku, Muhamed ^{[1
]}

Kokalari, Efrosini ^{[1
]}

Xhanari, Klodian ^{[1
]}

Isak, Nensi ^{[1
]}

Xhaxhiu, Kledi ^{[1
]}

Shehu, Alma ^{[1
]}

机构：

[1] Univ Tirana, Fac Nat Sci, Blvd Zogu I, Tirana 1001, Albania

来源：

JOURNAL OF ELECTROCHEMICAL SCIENCE AND ENGINEERING | 2024年 / 14卷 / 03期

关键词：

Green corrosion inhibitor; corrosion rate; inhibition efficiency; Flory-Huggins isotherm; inhibitor adsorption mechanism; GREEN CORROSION-INHIBITOR; COLD-ROLLED STEEL; MILD-STEEL; CARBON-STEEL; PITTING CORROSION; DERIVATIVES; ADSORPTION; ALUMINUM; OIL;

D O I：

10.5599/jese.2303

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The corrosion inhibition performance of the walnut fruit (Juglans regia L.) septum alcoholic extract for Fe B500B steel bars in a mixed acidic solution (H2SO4/HCl) is reported. Weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy measurements were performed at 298 to 318 K, with the addition of various extract concentrations. Results showed the maximum corrosion inhibition efficiency of 86.99 % for 300 mg L-1 extract added. The extract acts as a mixed-type inhibitor, predominantly affecting the anodic side, following Flory-Hoggins adsorption isotherm. Thermodynamic analysis indicated an endothermic process with both chemisorption and physisorption on the steel bar surface. Surface characterization was conducted using ATR-FTIR, UV-vis and SEM techniques to prove the adsorption of the inhibitor molecules on the steel bar surface. Also, a possible adsorption mechanism of inhibitor molecules was proposed.

引用

页码：297 / 320

页数：24