Electro-Plating may be defined as the Science and art of electro
deposition of relatively thin film of an adherent metallic coating
upon an electrode for the purposes of securing a surface with
properties or dimensions different from those of the base
metal.
Keeping in view of readership of the module, every effort has been
made to present the subject matter in simple language and style.
Various steps for plating processes have been outlines to lend
clarity to the subject.
The pass-outs of this course have ample scope to secure wage
employment in industry as there is sufficient demand for
professionally qualified and skilled electro-plators in various
industries in both rural and urban areas. One can also start
his/her own electro-plating shop.
- Corrosion:
Definition, its effects, Types of corrosive attacks,
Electrochemical corrosion: its components, Various forms of
corrosion, Uniform corrosion, Pitting Corrosion, Intergrannular
corrosion, Stress corrosion, Erosion corrosion, Corrosion fatigue,
Factors influencing rate of corrosion, Corrosion Control
- Electro-Chemistry:
Electro-chemical Reaction, Electrolysis of Molten electrolytes,
Electrolysis of aqueous Solutions, Faraday's Laws, Applications,
Electrical Conductivity of electrolytic solutions, Molar
Conductance of an electrolytic solution, Strong and Weak
electrolytes
- Electro-Plating:
Principle of electroplating, Rate of deposition, aims and
importance
- Metal Surface preparation and cleaning - Chemical
cleaning:
Metal Surface preparation and Cleaning, Chemical Cleaning,
Solvent cleaning, Cold solvent cleaning, Vapour degreecing- (a)
Petroleum Solvents, (b) Chlorinated Solvents, (c) Emulsifiable
Solvents, Alkaline cleaning (Detergent cleaning), (a) Immersion
cleaning, (b) Spray cleaning, (c) Electrolytic cleaning, (d) Ultra
sonic cleaning, Acid clearner, (a) Acid pickling, (b) Bright
dipping
- Metal Surface preparation and cleaning - Salt bath
cleaning:
Salt bath cleaning, Sodium hydroxide bath, Sodium hydroxide bath
with additives, Electrolytic bath
- Metal Surface preparation and cleaning - Mechanical
cleaning:
Rust Remover, Mechanical Cleaning, (a) Polishing, Polishing
Wheels, Adhesives, Abrasives, Abrasive belts, Lubrication, (b)
Brushing, (c) Buffing, Buffing wheels, (d) Polishing Components, 1.
Bar Components, 2. Liquid-spray buffing composition, (e)
Electro-Plating, Basic of Electro-Plating Bath, Preparation of
bath.
- Electro-Plating Sequences:
Electro-Plating Sequences, Preliminary Treatment, Plating of Low
carbon steel, Nickel Plating, Copper Plating, Chromium Plating,
Silver Plating, Gold Plating, Plating of copper and copper base
alloys, Silver plating on copper and copper base alloys, Gold
plating on copper and copper base alloys, Properties of electrolyte
solutions', Composition of various salt solution, Zinc plating, Tin
plating, Tin Immersion solution
- Electroplating on Plastices:
Electroplating on plastics, Cleaning, Etching, Neutralizing,
Catalyzing, Accelerating, Electro-less plating, Electro-plating
- Electro-plating Equipment:
Electro-plating equipment, Process tanks, (i) Welded steel tank,
Rods and connections for process tank, Container hook materials, i)
Copper, ii) Brass, iii) Bronze, iv) Aluminimum, v) Monel metal, vi)
Nichrome, Solution heating, Agitation of plating solution,
Filtration of plating solutions, Drying equipment, Electrical
equipment (redifier)
- Major defects in plating:
Major defects in plating, Causes of defects, Embossing
process
- Safety precautions in Electro-plating:
Safety precautions in electro-plating, Applications of
electro-plating