Transcript Lecture 1.pptx

Dr. Sufiyan
Engr. Faheem Hassan
Class Timetable
CLASS SCHEDULE
Saturday
13:00 – 13:50
Monday
13:00 – 13:50
Wednesday 13:00 – 13:50
ASSESSMENT METHOD
Assignments/Attendance: 20%
Quiz: 10%
Quiz : 10%
Mid Term: 20%
End Term: 40%
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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
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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
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Which cost more?
 Corrosion
 Fire
 Flooding
 Earthquake
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Country
Direct Cost
Indirect Cost
USA
303.76
200 (approximately)
Japan
59.02
Former USSR
55.01
Germany
49.26
UK
8.51
Australia
7.32
Belgium
6.75
India
3.78
Poland
3.53
Canada
3.38
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Global
510.14
940 (approximately)
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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%.
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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!!!
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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Refitting of equipment withdrawn from service because of corrosion.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.
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Thanks