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Effect of Tetra Propyl Ammonium Bromide During Cobalt Electrodeposition from Acidic Sulfate Solutions

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Abstract

In the current study, the effect of an organic additive tetra propyl ammonium bromide (TPAB) on the structural, morphological characteristics of the cobalt metal produced from aqueous sulfate solutions has been investigated. The concentration of TPAB was varied over a range of 1 to 50 mg/L to evaluate its effect on current efficiency, energy consumption, and quality of electrodeposited cobalt. Smooth and bright electrodeposits of cobalt were obtained at low concentration of TPAB (10 mg/L) maintaining a current efficiency of 99.4 pct, with a low energy consumption of 2.42 kWh/kg. X-ray diffraction studies revealed that (100) plane is the most preferred plane of crystal growth during cobalt electrodeposition. However, at higher concentrations, the (101) plane became the most preferred one. Scanning electron micrographs indicated that smooth and uniform deposit of cobalt was obtained at 10 mg/L beyond which the deposit quality deteriorates. The presence of TPAB in the electrolytic bath polarizes the cathode and decreases the cathodic current considerably. AAS results indicated that the cobalt deposits were of high purity.

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Acknowledgments

The authors are thankful to MOES, New Delhi for partial financial support. The authors would also like to thank Dr. Y.S. Chaudhary and K.K. Nanda for providing help in carrying out polarization studies. Thanks are also due to Jogeswar for XRD and Debadatta for SEM analyses.

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Authors and Affiliations

  1. Hydro and Electrometallurgy Department, CSIR - Institute of Minerals and Materials Technology (IMMT), Bhubaneswar, 751013, India

    Pinak Patnaik (PhD Scholar), Bankim Chandra Tripathy (Senior Scientist), Indra Narayan Bhattacharya (Senior Principal Scientist) & Barada Kanta Mishra (Professor and Director)

  2. Academy of Scientific and Innovative Research (AcSIR), Training and Development Complex, CSIR Road, Chennai, 600 113, India

    Pinak Patnaik (PhD Scholar) & Bankim Chandra Tripathy (Senior Scientist)

  3. School of Mechanical Engineering, KIIT University, Bhubaneswar, 751024, India

    Raja Kishore Paramguru (Professor)

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  1. Pinak Patnaik
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  2. Bankim Chandra Tripathy
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  3. Indra Narayan Bhattacharya
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  4. Raja Kishore Paramguru
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Correspondence to Bankim Chandra Tripathy.

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Manuscript submitted June 10, 2014.

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Patnaik, P., Tripathy, B.C., Bhattacharya, I.N. et al. Effect of Tetra Propyl Ammonium Bromide During Cobalt Electrodeposition from Acidic Sulfate Solutions. Metall Mater Trans B 46, 1252–1256 (2015). https://doi.org/10.1007/s11663-015-0301-6

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  • DOI: https://doi.org/10.1007/s11663-015-0301-6

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