Vibration and Corrosion Analysis of Modified Alumina Coating over Aluminum Alloy
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TECHNICAL ARTICLE—PEER-REVIEWED
Vibration and Corrosion Analysis of Modified Alumina Coating over Aluminum Alloy Veena Dhayal . Dalip Singh . Ajay Saini . Shubham Sonewane . Dinesh Chandra Agarwal
Submitted: 13 July 2020 / in revised form: 24 September 2020 / Accepted: 4 October 2020 Ó ASM International 2020
Abstract This analysis is concerned with the investigation of the capability of alumina coating deposited by spray coating method using oxime-modified aluminum(III) isopropoxide as a sol–gel precursor to improve vibration damping and anti-corrosion properties of aluminum alloys. Coating microstructures, thickness and roughness were investigated by scanning electron microscopy (SEM) and atomic force microscopy (AFM) studies, respectively. To this end, the quality of the coating was determined by the corrosion rate which was analyzed by mean of electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. The vibration and noise technique were applied to measure comparison of vibration and noise damping of bare and alumina coated samples. The results indicate the alumina coating deposited over aluminum alloy by spray coating method is uniform, homogenous, crack free, having high vibration damping and anti-corrosive behavior.
V. Dhayal Department of Chemistry, Manipal University Jaipur, Jaipur 303007, India D. Singh (&) D. C. Agarwal School of Automobile, Mechanical and Mechatronics, Manipal University Jaipur, Jaipur 303007, India e-mail: [email protected] A. Saini Central Analytical Facilities, Manipal University Jaipur, Jaipur 303007, India S. Sonewane Department of Mechanical Engineering, IIT Kanpur, Kanpur 208016, India
Keywords Alumina Aluminum alloy Corrosion Vibration and noise
Introduction Aluminum alloys have received much attention in various industries due to their advantage of high strength to weight ratio [1–5]. However, shortcomings of aluminum alloy such as lower capacity to bear dynamic effects produced by time-dependent external forces or displacements and corrosion in chloride environments have seriously restricted their extensive applications [6]. There is an increasing need to protect aluminum alloys through appropriate surface modifications to stretch the range of applications. To achieve this, one of the popular methods is deposition of metal oxide coatings. Oxide coatings have high application potential due to their chemical, mechanical and thermal stabilities with anti-corrosive properties. Several metal oxides are being used as protective coatings such as Al2O3 [7, 8], TiO2 [9], CeO2 [10], Cr2O3 [11] and ZrO2 [12]. Among them, alumina having resistance to dynamic effects, corrosion, high temperature attack and oxidation is popularly used [13]. Dynamic loads and corrosion are the major problems encountered in moving vehicles, wind gusts, and marine applications [14]. In dynamic loads, excited vibration response needs to be studied and analyzed with respect to the damping properties and dynamic mechanical performance (DMA). DMA evaluates the damping behavior
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