Silver Nanoparticles Intercalated Polyaniline Composites for High Electrochemical Anti-Corrosion Performance in 6061 Alu
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Silver Nanoparticles Intercalated Polyaniline Composites for High Electrochemical Anti‑Corrosion Performance in 6061 Aluminum Alloy‑Based Solar Energy Frameworks Nacer Badi1,2 · Syed Khasim1,2,3 · Apsar Pasha4 · Ayshah S. Alatawi1,2 · Mohana Lakshmi3 Received: 16 May 2020 / Revised: 3 August 2020 / Accepted: 20 August 2020 © Springer Nature Switzerland AG 2020
Abstract In this work, we report on polyaniline (PANI)–silver nanoparticles (AgNPs) coatings prepared by in-situ polymerization technique. These composites show an excellent corrosion resistance behavior in aggressive environments much superior to PANI. The corrosion studies were carried out on 6061 aluminum alloy substrates coated with PANI-AgNPs composites with different concentrations of silver nanoparticles. The PANI-AgNPs composites were characterized by Scanning and Transmission electron microscopes (SEM/TEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and Thermogravimetric analysis (TGA). The conductivity of these composites strongly depends on AgNPs concentration with percolation maxima at 20 wt% of AgNPs in PANI. The composite coatings were evaluated for anti-corrosion performance by using standard corrosion testing method, open-circuit potential analysis, potentiodynamic polarization curve, and electrochemical impedance spectroscopy. The increase in diffusion barrier, prevention of charge transport by the AgNPs, redox properties of polyaniline as well as the large surface area available for the liberation of dopant due to nano-size additive appear to be associated with the exceptional improvement in anti-corrosion performance of elaborated coatings. Due to ease of preparation, better thermal stability, enhanced conductivity, and excellent corrosion inhibition properties, this PANI-AgNPs composite could be used as a potential anti-corrosion coating material in protecting aluminum infrastructures. Keywords Polyaniline · Silver nanoparticles · Anti-corrosion · Corrosion protection coatings
1 Introduction There is a growing attention towards harvesting energy using solar power in the past decades [1–4]. However, the life span and durability of the aluminum-based frameworks used in solar power generation panels are greatly affected by the environmental corrosion [5–8], and there is a growing * Nacer Badi [email protected] 1
Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia
2
Renewable Energy Laboratory, Nanotechnology Research Unit, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia
3
Department of Physics, PES University-Bangalore South Campus, Bangalore 560100, India
4
Department of Physics, Ghousia College of Engineering, Ramanagaram, Karnataka 562159, India
demand to protect these frameworks using suitable self-healing anti-corrosion coatings. Metallic structures in modern industry rely on organic coatings for corrosion protection [9, 10]. Intrinsically, conducting polymers have become a landmark for new generation research and innovation due to th
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