Corrosion inhibition of X65 steel in sulfuric acid by two food flavorants 2-isobutylthiazole and 1-(1,3-Thiazol-2-yl) ethanone as the green environmental corrosion inhibitors: Combination of experimental and theoretical researches

Bochuan Tan; Shengtao Zhang; Hongyan Liu; Yuwan Guo; Yujie Qiang; Wenpo Li; Lei Guo; Chunliu Xu; Shijin Chen

doi:10.1016/j.jcis.2018.12.020

Corrosion inhibition of X65 steel in sulfuric acid by two food flavorants 2-isobutylthiazole and 1-(1,3-Thiazol-2-yl) ethanone as the green environmental corrosion inhibitors: Combination of experimental and theoretical researches

J Colloid Interface Sci. 2019 Mar 7:538:519-529. doi: 10.1016/j.jcis.2018.12.020. Epub 2018 Dec 6.

Authors

Bochuan Tan¹, Shengtao Zhang², Hongyan Liu³, Yuwan Guo⁴, Yujie Qiang¹, Wenpo Li¹, Lei Guo⁵, Chunliu Xu⁶, Shijin Chen⁷

Affiliations

¹ School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China.
² School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China. Electronic address: stzhang@cqu.edu.cn.
³ College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, Shanxi 037009, China. Electronic address: liuhongyan@tyut.edu.cn.
⁴ Department of Chemical and Biomolecular Engineering, University of California, Los Angles 90024, USA.
⁵ School of Material and Chemical Engineering, Tongren University, Tongren 554300, China.
⁶ Chemical Engineering, Sichuan University, Chengdu 610065, China.
⁷ Bomin Electronics Ltd, Meizhou 514021, China.

PMID: 30544069
DOI: 10.1016/j.jcis.2018.12.020

Abstract

Food flavors of 2-isobutylthiazole (ITT) and 1-(1,3-Thiazol-2-yl)ethanone (TEO) for the corrosion inhibition of X65 steel in H₂SO₄ were studied by electrochemical methods, atomic force microscopy (AFM), scanning electron microscopy (SEM) and theoretical calculations. Electrochemical experiments show that ITT and TEO can effectively inhibit the corrosion of cathode and anode of X65 steel, and they are mixed-type corrosion inhibitors. Surface topography analysis (SEM and AFM) also visually demonstrate that ITT and TEO form an effective barrier film on the X65 steel surface to isolate the corrosive medium. Theoretical calculations profoundly explain the inhibition mechanism of ITT and TEO at the molecular level. In addition, the adsorption behavior of ITT and TEO on the surface of X65 steel is consistent with Langmuir isotherm adsorption. The results of experimental and theoretical studies have shown that the inhibition effect of TEO is better than ITT for X65 in 0.5 M H₂SO₄.

Keywords: Electrochemical methods; Food flavor; Langmuir isotherm; Surface topography analysis; Theoretical calculations; X65 steel.

MeSH terms

Adsorption
Electrochemical Techniques
Microscopy, Atomic Force
Molecular Structure
Quantum Theory*
Steel / chemistry*
Sulfuric Acids / chemistry*
Surface Properties
Thiazoles / chemistry*

Substances

Sulfuric Acids
Thiazoles
Steel
2-isobutyl-1,3-thiazole
sulfuric acid