Investigation of Diantipyrylmethane as Corrosion Inhibitor for Mild Steel in Sulfuric Acid Solution

被引：1
|
作者：
Gong, Lijuan [1 ]
Qiao, Kangquan [2 ,3 ]
机构：
[1] Sichuan Univ Sci & Engn, Coll Bioengn, Zigong 643000, Peoples R China
[2] Sichuan Univ Sci & Engn, Anal & Testing Ctr, Zigong 643000, Peoples R China
[3] Mat Corros & Protect Key Lab Sichuan Prov, Zigong 643000, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2016年 / 11卷 / 12期
关键词：
Diantipyrylmethane; Mild steel; Acid Corrosion; SCHIFF-BASE; ADSORPTION BEHAVIOR; DERIVATIVES; HCL; 4-AMINOANTIPYRINE; SURFACTANT; MEDIA;
D O I：
10.20964/2016.12.20
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 performances of Diantipyrylmethane (DAM) for mild steel in 0.5 M H2SO4 were investigated using weight loss, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, scanning electron microscope (SEM) and quantum chemical calculation. The obtained results reveal that DAM acts as a mixed-type inhibitor with a predominantly anodic reaction, and the inhibition efficiency increases with increasing inhibitor concentration whereas decreases with increasing temperature. The adsorption of DAM on steel surface is found to obey Langmuir isotherm, and the adsorption mechanism is mixed physical and chemical adsorption. The results of quantum chemical calculation demonstrate that pyrazolone rings within molecular structure of DAM play a dominant role in corrosion inhibition of mild steel.
引用
收藏
页码：10135 / 10149
页数：15
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