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Corrosion Inhibition of Copper in Sea Water Using Derivatives of Tetrazoles and Thiosemicarbazide

[ Vol. 8 , Issue. 1 ]

Author(s):

Abdul-Khalek Younes, Ibrahim Ghayad*, Emel B. Ömer and Fatma Kandemirli   Pages 60 - 66 ( 7 )

Abstract:


Background: The present paper investigates the corrosion inhibition of copper using six corrosion inhibitors namely: 4-phenyl thiosemicarbazide (PTSC), Salicylaldehydethiosemicarbazone (STSC). 5-Mercapto-1-methyle tetrazole (MMT), 5-(3-Pyridyl)-1H-tetrazole (PyTA), 5-phenyl-1-Htetrazole (PTA) and 5-Amino-tetrazole monohydrate (ATA).

Method: Copper samples were tested using potentiodynamic polarization technique in the absence and in the presence of corrosion inhibitors.

Results: Results show that tetrazole derivatives show high inhibition efficiencies (≥90%) in comparison to thiosemicarbazide derivatives (<80%). The highest inhibition efficiency of 92.9% was shown by ATAH at 2000 ppm. The order of inhibition efficiencies of the tested compounds was as follows: PTA≈ATA >PyTA> MMT > STC > PTSC.

Keywords:

Corrosion inhibition, copper, sea water, thiosemicarbazides, tetrazoles, inhibition efficiency.

Affiliation:

Department of Material Science, Kastamonu University, Kastamonu, Central Metallurgical Research & Development Institute, Helwan, Department of Chemistry, Halisdmir University, Nigde, Department of Material Science, Kastamonu University, Kastamonu

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