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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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Bulletin of Pure and Applied Sciences-Chemistry (Started in 1982)
Year : 2021, Volume & Issue : BPAS-Chemistry 40C(1), JAN-JUN 2021
Page No. : 30-38, Article Type : Original Aticle
Article DOI : 10.5958/2320-320X.2021.00005.4 (Received on 30.02.2021 Accepted on 24.05.2021)

Effect of Ocimum sanctum (Tulasi) Extract Inhibitors for Aluminum 8088 Alloy in a 1 M HCl Solution

1Pruthviraj RD* 2Jahagirdar AA 3Swamy MT 4Vishwanath KC
Author’s Affiliation : 1Department of Chemistry, Rajarajeswari College of Engineering, Bangalore, Karnataka 560074, India 2Department of Chemistry, Dr. Ambedkar Institute of Technology, Bangalore, Karnataka 560056, India 3Department of Chemistry, Sambhram Institute of Technology, Bangalore, Karnataka 560097, India 4Department of Mechanical Engineering, Rajarajeswari College of Engineering, Bangalore, Karnataka 560074, India

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


Two environmental friendly Ocimum sanctum (Tulasi) inhibitors 6-diallylamino-1,3,5-triazine-2,4- dithiol monosodium (DAN) and 6-dibutylamino-1,3,5-triazine-2,4-dithiol mono sodium (DBN) were synthesized and their corrosion inhibition for aluminum 8088 in a 1 M HCl solution was studied using weight loss methods, electrochemical measurements, and scanning electron microscopy (SEM) techniques. The inhibition efficiency of both DAN and DBN improved with increases in inhibitor concentration but decreased with increases in temperature. Results from potentiodynamic polarization and EIS showed that the corrosion inhibition efficiency of DAN and DBN was excellent. The adsorption of inhibitors on the aluminum 8088 surface followed Langmuir adsorption isotherms. Morphology observation revealed that the aluminum 8088 was greatly protected by these Ocimum sanctum (Tulasi) inhibitors.


Aluminum 8088; Potentiodynamic polarization; Corrosion inhibition
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