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Inhibition of corrosion of Cu(II) in HNO3 using substituted hydroxytriazene

  • Physicochemical Problems of Materials Protection
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Abstract

Inhibition effect of some hydroxytriazenes on copper in nitric acid medium has been studied using weight loss technique at temperature range between 303 to 343 K. The used hydroxytriazene compounds are 3-Hydroxy-3-phenyl-1-(4-sulphonato(sodium salt) phenyl) triazene(HPST), 3-Hydroxy-3-(3-methylphenyl)- 1-(4-sulphonato(sodium salt) phenyl) triazene(HMMPST), 3-Hydroxy-3-(4-methylphenyl)-1-(4-sulphonato (sodium salt) phenyl) triazene (HPMPST), 3-Hydroxy-3-(3-chloroplenyl-(4-sulphonato (sodiumsalt) phenyl) triazene (HMCPST), 3-Hydroxy-3-(4-chloroplenyl-(4-sulphonato (sodiumsalt)phenyl) triazene (HPCPST). Results reveal that inhibition efficiency increases with increasing concentration of hydroxytriazenes from 0.0005 to 0.002 M in following order HPMPST > HPST > HMMPST > HPCPST > HMCPST. HPMPST compound in 0.002M concentration show maximum inhibition efficiency of ~90 at % 303 K temperature. Effect of temperature on inhibition efficiency and thermodynamic parameters have also been reported. The adsorption of hydroxytriazenes obeyed Langmuir Adsorption Isotherm.

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Authors and Affiliations

  1. Coordination Laboratory, Department of Chemistry, Mohanlal Sukhadia University, Udaipur, 3130001, Rajasthan, India

    Pratibha Sharma, Alpana Soni, Prabhat K. Baroliya, Rekha Dashora & A. K. Goswami

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  1. Pratibha Sharma
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  2. Alpana Soni
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  3. Prabhat K. Baroliya
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  4. Rekha Dashora
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  5. A. K. Goswami
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Correspondence to A. K. Goswami.

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Sharma, P., Soni, A., Baroliya, P.K. et al. Inhibition of corrosion of Cu(II) in HNO3 using substituted hydroxytriazene. Prot Met Phys Chem Surf 52, 930–935 (2016). https://doi.org/10.1134/S2070205116050221

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  • DOI: https://doi.org/10.1134/S2070205116050221

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