Corrosion inhibition of galvanized steel in hydrochloric acid medium by a physically modified starch

被引：32
|
作者：
Anyiam, C. K. [1 ,3 ]
Ogbobe, O. [2 ]
Oguzie, E. E. [3 ]
Madufor, I. C. [2 ]
Nwanonenyi, S. C. [2 ,3 ]
Onuegbu, G. C. [2 ]
Obasi, H. C. [2 ]
Chidiebere, M. A. [3 ]
机构：
[1] Fed Univ Technol Owerri, Dept Prosthet & Orthot Technol, Owerri, Nigeria
[2] Fed Univ Technol Owerri, Dept Polymer & Text Engn, Owerri, Nigeria
[3] Fed Univ Technol Owerri, Dept Chem, Electrochem & Mat Sci Res Lab, Owerri, Nigeria
来源：
SN APPLIED SCIENCES | 2020年 / 2卷 / 04期
关键词：
Galvanized steel; Hydrochloric acid; Gravimetric measurements; Physically modified starch; 1 M HCL; MILD-STEEL; PHYSICOCHEMICAL PROPERTIES; ADSORPTION BEHAVIOR; HALIDE-IONS; EXTRACT; DERIVATIVES; PROTECTION; GLUCOSE; RAMAN;
D O I：
10.1007/s42452-020-2322-2
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Native starch extracted from sweet potato tubers was modified via extrusion. The native starch and modified starch were characterized by Fourier transform infrared (FTIR) spectroscopy, which revealed slight modifications in peak position and intensities on starch modification. The modified starch was evaluated as a corrosion inhibitor of galvanized steel in 1 M HCl solution by gravimetric and potentiodynamic polarization measurement techniques. Results obtained from gravimetric measurement reveals that the modified starch inhibition efficacy was dependent on time, concentration and temperature, increasing with increase in concentration and decreasing with increase in time of immersion and temperature of the system. Maximum inhibition efficiency of 64.26% was obtained at a concentration of 0.7 g/L PMS. Also, result from polarization technique indicated that the modified starch belonged to a mixed-type inhibitor. Adsorption of the inhibitor on the galvanized steel surface was found to obey the Langmuir adsorption isotherm.
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页数：11
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