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Bulletin of Pure and Applied Sciences-Chemistry (Started in 1982)
eISSN: 2320-320X
pISSN: 0970-4620
Impact Factor: 6.991 (2018)
DOI: 10.5958/2320-320X
Editor-in-Chief:  Dr. Pruthviraj. R.D.
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Article Details

Bulletin of Pure and Applied Sciences-Chemistry (Started in 1982)
Year : 2021, Volume & Issue : BPAS-Chemistry 40C(1), JAN-JUN 2021
Page No. : 7-15, Article Type : Original Aticle
Article DOI : 10.5958/2320-320X.2021.00002.9 (Received on 30.01.2021 Accepted on 23.05.2021)

Corrosion Inhibitive Effects of Coconut Water for Al 7075 Alloy in Acidic Medium

1Pruthviraj RD* 2Vishwanath KC 3Jahagirdar AA 4Swamy MT 5Ashok SD
Author’s Affiliation : 1Department of Chemistry, Rajarajeswari College of Engineering, Mysore Raod, Bangalore, Karnataka 560074, India 2Department of Mechanical Engineering,, Rajarajeswari College of Engineering, Mysore Raod, Bangalore, Karnataka 560074, India 3Department of Chemistry, Dr. Ambedkar Institute of Technology, Mallathalli, Bangalore, Karnataka 560056, India 4Department of Chemistry, Sambhram Institute of Technology, Vidyaranyapura, Bangalore, Karnataka 560056, India 5Department of Chemistry, R & D Centre for Nano Science and Nano Technology, Global Academy of Technolohy, RR Nagar, Bangalore, Karnataka 560098, India

Corresponding Author : Pruthviraj RD, Department of Chemistry, Rajarajeswari College of Engineering, Mysore Raod, Bangalore, Karnataka 560074, India,
E-Mail:-[email protected]


Abstract

The corrosion inhibitive effect of coconut water as an eco-friendly inhibitor for the corrosion control of Al 7075 alloy in 0.5 Molar solution of H2SO4 acid have been investigated using the weight loss method which is considered more informative than other laboratory techniques. The studies were carried out using 30-110ml of the coconut water. The test coupons were totally immersed in the corroding medium containing various concentration of the inhibitor at the time intervals of 24-192 hours. The results obtained showed that the concentration of the inhibitor in the corrodent impacted differently on the test coupons. The corrosion rate was found to decrease while the inhibitor efficiency increases as the inhibitor concentration was increased. The plateau of maximum inhibition efficiency of 89.07% and 81.57% was obtained at the concentration of 90ml and 110ml for 24hours and 48hours immersion time respectively. The study showed that coconut water possesses inhibiting properties for reducing the corrosion of Al 7075 alloy in the acidic medium.

Keywords

Coconut water, inhibitive effect, Al 7075 alloy, H2SO4, corrosion rate
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