Lec 17 - ENGR 4250 ENGR 4250 dvanced Materials Engineering...

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Unformatted text preview: ENGR 4250 ENGR 4250 dvanced Materials Engineering dvanced Materials Engineering Advanced Materials Engineering Advanced Materials Engineering cture 17 cture 17 Lecture 17 Lecture 17 CORROSION AND DEGRADATION Instructor: Ghaus Rizvi CHAPTER 17: SUES TO ADDRESS CORROSION AND DEGRADATION ISSUES TO ADDRESS... Why does corrosion occur ? What metals are most likely to corrode? How do temperature and environment affect corrosion rate? How do we suppress corrosion? Deteriorative Mechanisms Metals: Material loss by dissolution corrosion Formation of non metallic scale oxidation Ceramic: Resistant but occurs at only at high temperatures & extreme environment corrosion Polymers: degradation Dissolves in liquid solvents; or swell UV rays or heat molecular structure alteration Corrosion of Metals Destructive attack of a metal Electrochemical reaction Begins at the surface dvantages - tching Advantages etching Sapona imini and Cat Cay Bimini and Cat Cay THE COST OF CORROSION Corrosion :-- the destructive electrochemical attack of a material....
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Lec 17 - ENGR 4250 ENGR 4250 dvanced Materials Engineering...

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