1. Dr. Sufiyan Engr. Faheem Hassan

2. CLASS SCHEDULE Saturday 13:00 – 13:50 Monday 13:00 – 13:50 Wednesday 13:00 – 13:50 ASSESSMENT METHOD Assignments/Attendance: 20% Quiz: 10% Mid Term:20% End Term:40% Class Timetable

3.  Introduction  Basics in corrosion  Basics in chemistry  Basics in Metallurgy  Corrosion reactions  Corrosion cells  Corrosion rates  Electromotive series and Galvanic series  Factors affecting corrosion  Forms of corrosion  Thermodynamics and kinetics of corrosion  Corrosion control measures

5.  Corrosion may be defined as the destruction of a metal or an alloy because of chemical or electrochemical reaction with its surrounding environment or medium 5

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16.  Which cost more?  Corrosion  Fire  Flooding  Earthquake 16

17. CountryDirect CostIndirect Cost USA303.76200 (approximately) Japan59.02 Former USSR55.01 Germany49.26 UK8.51 Australia7.32 Belgium6.75 India3.78 Poland3.53 Canada3.38..... Global510.14940 (approximately) 17

18.  An 8" in. dia oil pipeline 225 miles long with a in. wall thickness was installed with no corrosion protection system  With appropriate protection namely cathodic protection, it would have a thin wall thickness which would  save 3,700 tons of steel (worth more than one million dollar)  increase internal capacity of the pipeline by about 5%. 18

19.  Materials are precious resources  Engineering design is incomplete without knowledge of corrosion  Applying knowledge of corrosion protection can minimize disasters  Corrosion – contaminate products such as pharmaceutical, food and dairy products or luxury items like soap  Corrosion products – threat to the environment  Artificial implants for the human body!!! 19

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21.  Ensuring maximum life of new equipment  Preservation of existing equipment  Protecting or improving the quality of a product in order to maintain or improve a competitive position.  Avoiding costly interruptions of production.  Reducing or eliminating losses of valuable products by spillage or leaks.  Refitting of equipment withdrawn from service because of corrosion.  Reducing hazards to life and property that might be associated with corrosion:  Explosions of pressure vessels or piping systems  release of poisonous or explosive gases or vapors are a few examples. 21

22. Thanks