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Polynitroaniline as brightener for zinc–nickel alloy plating from non-cyanide sulphate bath
H P Sachin Ganesha Achary Y Arthoba Naik T V Venkatesha
Electrochemistry Volume 30 Issue 1 February 2007 pp 57-63
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https://www.ias.ac.in/article/fulltext/boms/030/01/0057-0063 -
Keywords
Electrodeposition ;electropolymerization ;polynitroaniline ;SEM studies ;Zn–Ni alloy. -
Abstract
Electro-polymerization of orthonitroaniline was carried out on graphite electrode in hydrochloric acid medium. Zinc–nickel alloy deposition was carried out in the presence of polynitroaniline in acid sulphate bath. The bath constituent and bath variables were optimized through Hull cell experiments. The current efficiency and throwing power were measured. High shift of potential towards more cathodic direction was observed in presence of addition agent. Corrosion resistance test revealed good protection of base metal by zinc–nickel coating obtained from the developed electrolyte. SEM photomicrograph shows fine-grained deposit in the presence of addition agent. The consumption of brightener in the lab-scale was 0.01 gL-1 for 1000 amp-h.
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Author Affiliations
H P Sachin1 Ganesha Achary1 Y Arthoba Naik1 T V Venkatesha1
- Department of Chemistry, School of Chemical Sciences, Kuvempu University, Shankaraghatta 577 451, India
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Dates
- Published
- February 2007
- Manuscript received
- 17 June 2006
- Manuscript revised
- 15 November 2006
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Bulletin of Materials Science
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