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Civil Structures - Corrosion Civil Structures - Corrosion

Civil Structures - Corrosion - PowerPoint Presentation

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Uploaded On 2016-03-10

Civil Structures - Corrosion - PPT Presentation

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

oxidation corrosion occurs reduction corrosion oxidation reduction occurs metals metal deterioration chemical electrons

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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.