PPT-Introduction to Corrosion

Materials Engineering Dr Lubna Ghalib Definition Destruction or deterioration of a material due to their reaction or chemical attack by its environment Materials may be metals amp alloys or nonmetals like ceramics plastics rubber . 0 Introduction 1 20 What causes stress corrosion cracking 21 Introduction 22 Active path dissolution 23 Hydrogen embrittlement 24 Filminduced cleavage 30 When will SCC occur 2 40 Particular problem systems 3 41 Introduction 42 Brass in ammoniacontain It is intended to give an introduction to corrosion and its control in nontechnical terms More technical information is available on other areas of the NPL NCS website Bill Nimmo and Gareth Hinds NPL February 2003 brPage 2br Beginners Guide to Corro The most common example of corrosion is the formation of rust on steel Most corrosion phenomena are of electrochemical nature and consist of at least two reactions on the surface of the corroding metal One of the reactions is the oxidation eg dissol http://www.trekearth.com/gallery/Central_America/Cuba/East/Guantanamo/Baracoa/photo1001204.htm. Group 16. Aaron Salazar. Phillip Schneider. Kevin Stacy. Geoffrey . Thiel. Sections 16.2 – 16.6. Electrochemistry. Corrosion. Corrosion-An . oxidization. of a metal, and the oxide flaking off.. Oxidized metal is commonly called rust. Most commonly oxygen will oxidize a metal.. Either by . [Metal] + O. 2. . → . (. TKK-2289. ). 15/16 Semester . genap. Instructor: Rama Oktavian; . Vivi. . Nurhadianty. .. Email: rama.oktavian86@gmail.com. Office Hr.:. . T. 11-12. , Th. . 08. -10; 13-15, F. 08-10; 13-15. Corrosion types. Interim Report. March 3, 2017. Kurtis Gurley, PhD, . Professor . of Civil Engineering. Engineering School of Sustainable Infrastructure & Environment. University of Florida. 2015 – 2016 Work. Goals:. 2. INTERGRANULAR CORROSION. (INTERGRANULAR ATTACK.. . IGA. ). Metals are usually “polycrystalline” . . . an assemblage of single-crystal grains separated by grain boundaries.. Grain boundary in a polycrystalline metal (two-dimensional representation). . . (“Flow-Assisted”. . or “Flow-Accelerated”. . Corrosion). An increase in corrosion brought about by a high relative velocity between the corrosive environment and the surface.. Removal of the metal may be:. PRESENTATION. ON 01 – 02 JUN 2017. .. PRESENTED BY. :. AFRISUN COATING ENTERPRISES (PTY) LTD. PRESENTER: DANIEL VAN DER WESTHUIZEN . PRESENTATION 02: . BARRIERS vs. SEALS. PROTECTIVE. COATINGS . and information in the repair industry.... TECHNICAL. GUIDELINES. Guide for Electrochemical Techniques to Mitigate the Corrosion of Steel for Reinforced Concrete Structures. ICRI Technical Guideline No. . oxidization. of a metal, and the oxide flaking off.. Oxidized metal is commonly called rust. Most commonly oxygen will oxidize a metal.. Either by . [Metal] O. 2. . → . [Metal]O . Or . [Metal] H. oxidization. of a metal, and the oxide flaking off.. Oxidized metal is commonly called rust. Most commonly oxygen will oxidize a metal.. Either by . [Metal] + O. 2. . → . [Metal]O . Or . [Metal] + H. . . Muhamed. . Musthafa. . Pulikkal. . M. .Tech (NDT). Roll no.-213118015.