Inhibition effect of 2-amino-5-ethyl-1, 3, 4-thiadiazole on corrosion behaviour of austenitic stainless steel type 304 in dilute HCl solution

被引：11

作者：

Loto, Roland T. ^{[1
,2
]}

Loto, Cleophas A. ^{[1
,2
]}

Popoola, Abimbola P. ^{[2
]}

Fedotova, Tatiana ^{[2
]}

机构：

[1] Covenant Univ, Dept Mech Engn, Ota, Ogun State, Nigeria

[2] Tshwane Univ Technol, Dept Chem Met & Mat Engn, Pretoria, South Africa

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2016年 / 23卷 / 02期

关键词：

thiadiazole; adsorption; corrosion; stainless steel; inhibitor; HCl; MILD-STEEL; COPPER CORROSION; MEDIA; SYNERGISM;

D O I：

10.1007/s11771-016-3069-1

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The corrosion inhibition of type 304 austenitic stainless steel by 2-amino-5-ethyl-1, 3, 4-thiadiazole (TTD) compound and the electrochemical behaviour in dilute HCl solution were investigated through potentiodynamic polarization test, mass loss techniques and potential measurements. The results show that the organic derivative is highly effective with a maximum inhibition efficiency of 70.22% from mass loss analysis, while 74.2% is obtained from polarization tests. Observation of the scanning electron micrographs shows the absence of corrosion products due to electrochemical influence of TTD on the surface morphology of the steel. X-ray diffractometry reveals the absence of phase compounds and complexes on the steel samples after exposure. TTD adsorption on the steel surface obeys the Langmuir, Frumkin and Freundlich adsorption isotherms. Corrosion thermodynamic calculations reveal the inhibition mechanism occurs through chemisorption process and results from statistical analysis depict the strong influence of inhibitor concentration on the electrochemical performance of the TTD.

引用

页码：258 / 268

页数：11

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