Answered: Zinc is commonly used to coat mild…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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(a) Zinc is commonly used to coat mild steel. Explain the function of the zinc coating and describe the behaviour of the two metals if the coating is scratched to expose the underlying steel.

(b) Two bullet cartridges made of 70/30 brass were manufactured by cold-drawing. One of these was annealed at about 350°C for 1 hour, while the other remained in the cold-drawn condition. Explain and give reasons how the two cartridges will behave in a humid environment containing ammonia.

(c) Two uncoated copper plates are joined together using a bolt made of the same composition as the plates. The fastened design creates an overlap section. Suggest one possible risk of corrosion for this design and propose a solution.

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