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Inhibitive Effect of Dirithromycin on the Corrosion of Zinc in Tetraoxosulphate(VI) Acid Medium

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1TitleTitle of DocumentInhibitive Effect of Dirithromycin on the Corrosion of Zinc in Tetraoxosulphate(VI) Acid Medium
2CreatorAuthor's name, affiliation, country EMEKA OGOKO1 and ABIMBOLA OGUNSIPE 2 *
1 Department of Chemistry, National Open University of Nigeria, Lagos, Nigeria
2 Department of Chemistry, Federal University of Petroleum Resources, Effurun, Nigeria
3SubjectDicipline(s) Chemical Science
3SubjectKeywords Adsorption, Corrosion kinetics, Inhibition, Dirithromycin, Inhibition Efficiency, Activation thermodynamics
4DescriptionAbstract The inhibitive effect by dirithromycin, an antibacterial drug, on the corrosion of zinc has been investigated using weight loss method. The results obtained indicate that clindamycin inhibits zinc corrosion in tetraoxosulphate(VI) acid (0.01 to 0.04 M) media. The inhibition efficiency increased with increasing inhibitor’s concentration. Kinetic, thermodynamic and adsorption parameters were determined and discussed. The uninhibited corrosion of zinc followed first order kinetics; while the presence of dirithromycin increased the enthalpy of activation, Δ H and therefore made corrosion less probable. The calculated Δ G values for the corrosion processes were positive, but increased in the presence of dirithromycin, suggesting that the activated complex was rather unstable. The adsorption of dirithromycin on zinc surface was exothermic, spontaneous and was best described by Langmuir adsorption isotherm. The calculated values of activation energies and free energies of adsorption indicate that the adsorption process supports the mechanism of physical absorption.
5PublishersOrganizing agency, location WWW Publications, India
6Contributor Sponsor(s) -
7DateDate (YYYY-MM-DD) -
8TypeStatus & genre Peer-reviewed Article
8TypeType
9FormateFile Formate PDF
10IdentifierUniform Resource Identifier Click Here
10IdentifierDigital Object Identifier DOI:10.7598/cst2015.971
11SourceJournal/conference title; vol., no. (Year)Chemical Science Transactions, Volume  4 , Number  (2), (2015)
12LanuguageEnglish=en en
13RelationSupp.files
14Coverage -
15CopyrightCopyright and permissions
Chemical Science Transactions | Chem Sci Trans | CST | Online Chemistry Journal | Open Access
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