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Posted By: kondapalli Member Level: Gold Posted Date: 05 May 2008
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2007 Jawaharlal Nehru Technological University B.Tech Metallurgy & Material Technology ELECTROMETALLURGY AND CORROSION Question paper
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1. (a) Compare and contrast electrolytic conductors with metallic conductors.
(b) Explain the factors that affect electrolytic conduction. [8+8]
2. (a) Name the measuring instruments in Electrochemistry and explain them briefly.
(b) What is standard Potential? How is EMF measured? Discuss the usefulness
of EMF series. [8+8]
3. (a) Discuss copper plating from a cyanide bath commenting on the nature of the
deposits , advantages and disadvantages of the above bath.
(b) Explain about combined Polarization.
(c) Explain about single electrode potential and hall cell potential. [6+5+5]
4. Discuss the following methods of anodizing treatments.
(a) BENGOUGH [Chromic acid process]
(b) ALUMILITE [Sulphuric acid process] [8+8]
5. (a) Explain how the duration of corrosion test is determined.
(b) Explain the general behavior of corrosion with anodic polarization. [8+8]
6. (a) Explain the mechanism of galvanic cell corrosion.
(b) Discuss different types of galvanic cell corrosion. [8+8]
7. (a) Why thermodynamic approach is insufficient for the study of corroding system
and a kinetic approach is also essential.
(b) List the methods of corrosion protection and explain why each method is
effective. [7+9]
8. (a) Explain the differences between EMF series and galvanic series. What are the
drawbacks of these classifications?
(b) Explain the electrochemical behavior on the exterior and interior of tin plate
used as a food container.
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