Sonochemical approach for synthesis of zinc oxide-poly methyl methacrylate hybrid nanoparticles and its application in corrosion inhibition

Shital B Potdar; B V S Praveen; Shirish H Sonawane

doi:10.1016/j.ultsonch.2020.105200

Sonochemical approach for synthesis of zinc oxide-poly methyl methacrylate hybrid nanoparticles and its application in corrosion inhibition

Ultrason Sonochem. 2020 Nov:68:105200. doi: 10.1016/j.ultsonch.2020.105200. Epub 2020 Jun 1.

Authors

Shital B Potdar¹, B V S Praveen², Shirish H Sonawane³

Affiliations

¹ Department of Chemical Engineering, National Institute of Technology Warangal, Telangana State 506 004, India.
² Department of Chemical Engineering, B.V. Raju Institute of Technology, Telangana State 502 313, India.
³ Department of Chemical Engineering, National Institute of Technology Warangal, Telangana State 506 004, India. Electronic address: shirish@nitw.ac.in.

PMID: 32512431
DOI: 10.1016/j.ultsonch.2020.105200

Abstract

Hybrid nanoparticles (HNPs) with zinc oxide and polymethyl metha acrylate (inorganic/ polymer) were synthesized through the exploitation of ultrasound approach. The synthesized HNPs were further characterized employing transmission electron microscopy and x-ray diffraction. ZnO-PMMA based HNPs exhibit excellent protection properties to mild steel from corrosion when gets exposed to acidic condition. Electrochemical impendence spectroscopy (EIS) analysis was accomplished to evaluate the corrosion inhibition performance of MS panel coated with 2 wt% or 4 wt% of HNPs and its comparison with bare panel and that of loaded with only standard epoxy coating., Tafel plot and Nyquist plot analysis depicted that the corrosion current density (I_corr) decreases from 16.7 A/m² for bare material to 0.103 A/m² for 4% coating of HNPs. Applied potential (E_corr) values shifted from negative to positive side. These results were further supported by qualitative analysis. The images taken over a period of time indicated the increase in lifetime of MS panel from 2 to 3 days for bare panel to 10 days for HNPs coated panel, showing that ZnO-PMMA HNPs have potential application in metal protection from corrosion by forming a passive layer.

Keywords: Corrosion inhibition; Emulsion polymerization; Hybrid nanoparticles (HNPs); Poly methyl metha acrylate (PMMA); Ultrasound approach; Zinc oxide (ZnO).