11EGS 2014 Introduction Corrosion may be defined as the chemical deterioration of a material Metals are the key materials that are subject to corrosion but polymers and ceramics can also corrode ID: 249853
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Slide1
Civil Structures - Corrosion
11EGS
2014Slide2
Introduction
Corrosion may be defined as the chemical deterioration of a material.
Metals are the key materials that are subject to corrosion, but polymers and ceramics can also corrode.
Metallic corrosion involves the deterioration of metals or metal alloys, and is basically the reverse of the refining process.
Most metals occur as chemical compounds, and corrosion progressively returns them to this state.Slide3
Oxidation and reduction
Oxidation occurs when the metal loses electrons, and it occurs at the anode.
Oxidation = loss.
Reduction is the consumption of electrons and occurs at the cathode. It is the opposite to oxidation, therefore reduction = gain.
OILRIGSlide4
Forms Of CorrosionSlide5
Activity
From the website, summarise the following:
Uniform corrosion;
Galvanic corrosion;
Pitting corrosion;
Crevice corrosion;
Stress corrosion cracking;
Corrosion fatigue;
Corrosion in concrete.