Syllabus

Corrosion definition, Electrochemical and thermodynamic principles, Pourbaix diagram, Corrosion rate expressions, Tafel equation, Passivity,  Mixed potential theory, Forms of corrosion in metals & non-metals,   Evaluation of corrosion & degradation of materials, Methods of corrosion prevention, Case studies.

Detailed Version

Introduction and basic concepts: Corrosion definition - Electrochemical and thermodynamic principles, electrode potential of metals, EMF and galvanic series, Faraday’s laws Pourbaix diagram and its importance to iron, aluminium and magnesium metals

Electrochemical Kinetics of corrosion: corrosion rate expressions. Exchange current density, polarization - concentration, activation and resistance, Tafel equation, passivity, electrochemical behaviour of active-passive metals, factors governing metals exhibiting passivity, mixed potential theory and its application.
Forms of Corrosion: Atmospheric, galvanic, crevice, pitting, stress corrosion cracking, intergranular corrosion, corrosion fatigue, hydrogen damage, cavitation, fretting corrosion and high temperature oxidation-description, causes and remedial measures.
Corrosion measurement & testing : Purpose of testing, laboratory, semi-plant and field tests, susceptibility tests of IGC, stress corrosion cracking and pitting, ASTM standards for corrosion testing; polarization methods to measure corrosion rate, surface characterisation techniques.
Corrosion prevention : Corrosion prevention by design improvements, material selection, anodic and cathodic protection, metallic, non-metallic and inorganic coatings, mechanical and chemical methods and various corrosion inhibitors
Corrosion in industries: Corrosion in fossil fuel & power plants, automotive industry,aerospace industry, chemical processing industries, corrosion in petroleum production operations and refining, corrosion of pipelines. Corrosion in launch vehicles, related materials, launch facilities and in space environments.