기계재료 4판 솔루션 (the science and engineering of materials , instructors solution manual 4th , askeland)

Instructors‘ Solution Manual

THE SCIENCE AND ENGINEERING OF MATERIALS
Fourth Edition

Instructors‘ Solution Manual

THE SCIENCE AND ENGINEERING OF MATERIALS
Fourth Edition
Donald R. Askeland Pradeep P. Phule
Prepared by Gregory Lea

1
Introduction to Materials Science and Engineering
1?5 Iron is often coated with a thin layer of zinc if it is to be used outside. What ch-aracteristics do you think the zinc provides to this coated, or galvanized, steel? What precautions should be considered in producing this product? How will the recyclability of the product be affected? Solution: The zinc provides corrosion resistance to the iron in two ways. If the iron is completely coated with zinc, the zinc provides a barrier between the iron and the surrounding environment, therefore protecting the underlying iron. If the zinc coating is scratched to expose the iron, the zinc continues to protect the iron because the zinc corrodes preferentially to the iron (see Chapter 22). To be …