Corrosion Inhibition of a Gas Sparged Copper Cylinder in a Solution of NaCl and Na2S by Using 4-Amino-4H-1,2,4-triazole as Corrosion Inhibitor

Corrosion Inhibition of a Gas Sparged Copper Cylinder in a Solution of NaCl and Na2S by Using 4-Amino-4H-1,2,4-triazole as Corrosion Inhibitor

S.S. Al-Shahrani* A.H. El-Shazly

Chemical and Materials Engineering Department, King Abdulaziz University, Jeddah, Saudi Arabia

Chemical and Petrochemicals Engineering Department, Egypt-Japan University of Science and Technology, New Borg Elarab City, Alexandria, Egypt

Corresponding Author Email: 
ssaalshahrani@kau.edu.sa
Page: 
163-167
|
DOI: 
https://doi.org/10.14447/jnmes.v19i3.239
Received: 
07 April 2016
| |
Accepted: 
01 September 2016
| | Citation
Abstract: 

Most of previous investigations for corrosion inhibition of copper using triazole derivatives were carried out in stagnant conditions and mainly in presence either NaCl or Na2S. The  main aim of this work is to investigate the performance of one of triazole derivatives namely, 4-Amino-4H-1,2,4-triazole (AHT) on improving the corrosion resistance of gas sparged copper parts in a solution comprised of NaCl and Na2S with different propotions. The potentiodynamic technique was used for investigating the effect of different variables on the corrosion rate of gas sparged copper such as gas velocity, initial S-2concentration, gas sparged copper cylinder diameter, and initial AHT inhibitor concentration. The results show that the %improvement in corrosion resistance depends mainly on two main parameters, gas flow rate and amount of AHT inhibitor added. For lower gas velocities 0.07 cm/s the %improvement ranges from 6 to 22%, while for higher gas rate 0.35 cm/s it ranges from 2 to 7% depending on the amount of inhibitor added. The activation energy of the reaction was found to increase by approximately 20% by addition of the inhibitor up to 10ppm.

Keywords: 

corrosion, gas sparging, corrosion inhibitors, triazole derivatives, copper

1. Introduction
2. Experimental Part
3. Results and Discussion
4. Conclusions
5. Acknowledgement
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