Course

Unit I

Background Theory: Review of reversible and irreversible processes – electrodes, indicator and reference – Nernst and Butler-Volmer equation – phenomenon of polarization – factors influencing – Tafel experiment and Tafel plot – Significance.

Unit II

ElectrodepositionIndustrial plating of copper-nickel (dull and bright) – chromium on mild steel operating conditions and sequence pre-treatment processes – plant layout electroplating of zinc on MS and post plating chromating, yellow and blue passivation processes decorative plating of silver and gold on non-ferrous metals brief discussion on nano plating of metals and micro structure of the deposition.Properties of deposits: Tests for adhesion, hardness, thickness, uniformity and corrosion resistance of the electro deposits.Electroless deposition: Nickel, copper, gold on metal components bath composition and operating conditions- immersion plating – plating on plastics pre-treatment processes long duration plating electroforming, operating conditions and sequence.

Unit III

AnodizingIndustrial anodizing of aluminium and its alloys baths used, operating conditions and sequence plant layouteffect of temperature and current density on the thickness of anodic film determination of thickness industrial applications. Nano anodizing of titanium, aluminium and tantalum application to sensor field.Plasma electrolytic oxidation: power supply requirements baths used process sequence for aluminium, magnesium and titanium properties of the coating and industrial applications.

Unit IV

ElectropolishingMechanism of electropolishing electropolishing of ferrous and non-ferrous metals industrial baths used operating conditions and sequence – industrial applications.

Unit V

Electrochemical EtchingEtching of ferrous and non-ferrous metals special properties of matt and satin finish DC and AC processesoperating conditions and sequence.Special Topics: Electrochemical and chemical metal colouring of ferrous and non-ferrous metals.Black nickel coating hard chromium deposition hard anodizing of aluminium electrochemical machining of hard steels Electro-winning process barrel plating electrodeposition of paint.

TEXTBOOK1.Derek Pletcher and Frank C. Walsh, Industrial Electrochemistry, Blackie Academic and Professional, (1993).REFERENCES1.Christopher M A, Brett, Electrochemistry Principles, Methods and Applications, Oxford University, (2004).2.Watanabe T, Nano-plating: microstructure control theory of plated film and data base of plated film microstructure, Elsevier, Oxford, UK (2004).3.Kanani N, Electroplating and electroless plating of copper and its alloy, ASM International, Metals Park, OH and Metal Finishing Publications, Stevenage, UK (2003).4.Curtis, Electroforming’, London, (2004).5.Rumyantsev E and Davydov A, Electrochemical machining of metals, Mir, Moscow, (1989).6.Peter G Sheasby Basics of aluminium anodizing, Banbury, Oxon (2001)7.Robert Brugger Nickel Plating Robert Draper Ltd, Teddington, (1970)8.J.K. Dennis, T.E. Such, Nickel and Chromium Plating, Third Edition Woodhead Publishing Series in Metals and Surface Engineering, 3rd Edition, (1993)