Inhibitory effect of biowaste on copper corrosion in 1 M HCl solution. (June 2021)

• Record Type: Journal Article
• Authors: Hemapriya, Venkatesan; Chung, Ill-Min; Kim, Seung-Hyun; Prabakaran, Mayakrishnan
• Is Part Of: Materials today communications. Volume 27(2021)
• Publication Date: 2021-06
• Subjects: Corrosion -- Copper -- Adsorption -- Tafel -- SEM-EDS -- AFM; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2021.102249
• Languages: English
• ISSNs: 2352-4928

Abstract

Graphical abstract: Highlights: Corrosion mitigation potential of bio-waste (human hair) for copper. HRE adsorption on copper surfaces comply with Langmuir isotherm. Mixed mode corrosion protection capabilities of HRE divulged from Tafel plots. SEM-EDS and XRD studies complimented the impedance and polarisation results. Abstract: The potential of human hair extract (HRE), a biodegradable biowaste extract, to protect copper surface and inhibit metallic corrosion in 1 M HCl was investigated using electrochemical and weight loss techniques. The results revealed that HRE exhibits an efficient corrosion-mitigating effect via adsorption onto the metal surface following a Langmuir isotherm. A maximum inhibition efficiency (IE %) of 92.47 % was achieved using 100 ppm of the HRE inhibitor. Tafel plot results revealed the mixed-mode corrosion protection behavior of HRE. Surface analysis using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and atomic force microscopy (AFM) provided evidence for the precipitation of a protective HRE film on the metal surface. The interaction of HRE with copper was investigated using Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) spectroscopy; they confirmed the above conclusions.