Development of white tea extract as green corrosion inhibitor in mild steel under 1 M hydrochloric acid solution

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.224435

Keywords:

catechin, green corrosion inhibitor, chemisorption, adsorption, surface modification, Langmuir isotherm

Abstract

This work covers the effectiveness of the White tea extract as a green corrosion inhibitor and is correlated to the strength and stability bonding between the phenolic molecule and the Fe atoms in mild steel and how this interaction can be studied by altering the concentration and temperature. White tea has received considerable attention due to its capability as a corrosion inhibitor and has been extensively studied using electrochemical techniques. However, accurate and systematic functional group identification and surface modification have been missing. Our study sought to demonstrate the quantitative measurement of electrochemical impedance spectroscopy (EIS) complemented by the FTIR (Fourier transform infrared spectroscopy), Total Phenolic Test, and Raman Spectroscopy. The SEM (Scanning Electronic Microscope)/EDX (Energy-Dispersive X-Ray Spectroscopy), and AFM (Atomic Force Microscope) were used to study the surface modification. The EIS results show that the optimum inhibition efficiency was 96 % in a solution of 80 ppm at 60 °C. Acetone 70 % was used to extract White tea and gives 14.17±0.25 % phenolic compound. Spectroscopic studies show -OH, Aromatic C=C, C=O and C-O-C become major contributors in the adsorption process and are found on the surface of metals as corrosion protection. Meanwhile, the thermodynamic calculation shows the White tea was adsorbed chemically. The nearness of R2 to 1 shows the adsorption agrees with the Langmuir adsorption isotherm. Eventually, the surface modification revealed that phenol molecules are responsible to reduce the corrosion rate at 16.38×10-3 mpy. Our results are expected to provide a guideline for future research in White tea as a green corrosion inhibitor

Author Biographies

Agus Paul Setiawan Kaban, Universitas Indonesia

Master of Engineering, Post-Graduate Researcher

Department of Metallurgical and Materials Engineering

Center of Minerals Processing and Corrosion Research

Aga Ridhova, Indonesian Institute of Sciences

Metallurgy and Materials Researcher

Research Center for Metallurgy and Materials

Gadang Priyotomo, Indonesian Institute of Sciences

Doctor of Engineering, Researcher

Research group of Materials Corrosion & Protection Technology

Research Center for Metallurgy and Material

Berna Elya, Universitas Indonesia

Professor of Pharmacy

Phytochemistry and Pharmacognition Laboratory

Ahmad Maksum, Politeknik Negeri Jakarta

Doctor of Engineering

Department of Mechanical Engineering

Yunita Sadeli, Universitas Indonesia

Doctor of Engineering

Department of Metallurgical and Materials Engineering

Center of Minerals Processing and Corrosion Research

Sutopo Sutopo, Universitas Indonesia

Professor of Engineering

Center of Minerals Processing and Corrosion Research

Department of Metallurgical and Materials Engineering

Taufik Aditiyawarman, PT. Pertamina Hulu Energi; Universitas Indonesia

Master of Science

Department of Metallurgy and Material Engineering

Rini Riastuti, Universitas Indonesia

Doctor of Engineering

Department of Metallurgical and Materials Engineering

Center of Minerals Processing and Corrosion Research

Johny Wahyuadi Soedarsono, Universitas Indonesia

Doctor of Engineering, Professor

Department of Metallurgy and Material Engineering

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2021-04-12

How to Cite

Kaban, A. P. S., Ridhova, A., Priyotomo, G., Elya, B., Maksum, A., Sadeli, Y., Sutopo, S., Aditiyawarman, T., Riastuti, R., & Soedarsono, J. W. (2021). Development of white tea extract as green corrosion inhibitor in mild steel under 1 M hydrochloric acid solution . Eastern-European Journal of Enterprise Technologies, 2(6 (110), 6–20. https://doi.org/10.15587/1729-4061.2021.224435

Issue

Vol. 2 No. 6 (110) (2021): Technology organic and inorganic substances

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Technology organic and inorganic substances

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Copyright (c) 2021 Agus Paul Setiawan Kaban, Aga Ridhova, Gadang Priyotomo, Berna Elya, Ahmad Maksum, Yunita Sadeli, Sutopo Sutopo, Taufik Aditiyawarman, Rini Riastuti, Johny Wahyuadi Soedarsono

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