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Engineering Materials Technology, 2nd Edition
book

Engineering Materials Technology, 2nd Edition

by William Bolton
October 2013
Intermediate to advanced content levelIntermediate to advanced
468 pages
20h 15m
English
Newnes
Content preview from Engineering Materials Technology, 2nd Edition
176 Engineering Materials Technology
Metallic coatings can be applied to metals to protect them by electro-
chemical action. The coating used can achieve corrosion resistance by being
either a less noble or sacrificial metal or a more protective, more noble metal.
Anode Cathode
V
)
zinc
Steel
Figure 9.8 Galvanized steel
Zinc is less noble than steel and thus can be used to give sacrificial
protection. Steel components can be protected by dipping them in molten zinc
to form a thin surface coating of zinc on the steel surface. This method is
known as galvanizing. The zinc acts as an anode with the steel being the
cathode (Figure 9.8), and the
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Publisher Resources

ISBN: 9781483141077