4-aminoazobenzene modified natural glucomannan as a green eco-friendly inhibitor for the mild steel in 0.5 M HCl solution

• DOI: 10.1016/j.corsci.2019.02.027
• Publication Date: 2019-02-26T16:59:17Z
• Authors: Xiaohu Luo; Chenggang Ci; Ji Li; Kaidong Lin; Shuo Du; Huixia Zhang; Xiangbo Li; Y. Frank Cheng; Jiechao Zang; Yali Liu
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract The corrosion inhibition effect of a green eco-friendly 4-aminoazobenzene modified natural glucomannan (GL-PA) on the corrosion protection of mild steel in 0.5 M HCl solution is investigated by electrochemical measurements and surface characterization. The results show that the GL-PA acts as a mixed-type inhibitor and can provide effective corrosion inhibition for mild steel. The corrosion inhibition is achieved by the chemical as well as physical adsorption of the GL-PA on the surface of the mild steel, and the adsorption fairly obeys the Langmuir isotherm.