Discuss the requirement and applications of surface coating technology in engineering by giving suitable example.
[3 marks]List the type of coatings applicable on mild steel for i) Corrosion resistance ii) Wear and abrasion resistance iii) aesthetic appearance
[4 marks]Critically compare Mechanical, Chemical & Electro chemical methods of surface preparations. o f surface preparation.
[7 marks]Why Phosphate coating on mild steel material? Enlist the various types of phosphate coatings.
[3 marks]Discuss the role of oxide film in Aluminium anodizing. Discuss the properties developed after anodizing.
[4 marks]Critically compare Electrolytic plating process with Electro less plating. Give application of both the plating technologies.
[7 marks]Define galvanizing. Draw Neat Sketch of hot dip galvanizing process
[7 marks]Why Pickling is required? Draw the process flow chart of pickling only
[3 marks]Discuss working Principle of Electro less Nickel plating
[4 marks]Explain various factors affecting Electrodeposition
[7 marks]Define Sputtering? Draw Schematic only.
[3 marks]Compare Physical Vapour deposition & Chemical Vapour deposition.
[4 marks]Critically compare Boronizing and Boronitriding Process
[7 marks]What is thermal spray coating? How it can be achieved?
[3 marks]How Stainless Steels can be protected? Which Surface treatment do you suggest for it?
[4 marks]Discuss plasma spray coating technique with its advantages over other techniques.
[7 marks]Suggest type of surface treatment needed for removing black oxide layer from Silver ornaments.
[3 marks]Compare Liquid Carburizing & Gas Carburizing in terms of media used, quality and productivity of the process.1
[4 marks]What is plasma Nitriding ? What are its advantages over other Nitriding Processes. How it can be achieved ?
[7 marks]List different quality tests of Electroplated article.
[3 marks]Discuss & draw the defects found in Electroplated objects and state the causes of it.
[4 marks]Describe Electroplating of Copper. Explain factors affecting Electrodeposition
[7 marks]How the mill rust on rolled, forged components can be removed? Which process do you suggest?
[3 marks]Compare Physical Vapour deposition & Chemical Vapour deposition.
[4 marks]State the type of Surface Engineering on the following engineering components 1. Stainless steel kitchen utensils 2. Automobile body 2. Inlet /exhaust valves 3. Decorative Ash tray 4.Plumbing pipes 5. Springs for corrosive application 6. Car wheel rim 7. Bicycle sprocket.
[7 marks]