CorroZone: Introduction to Corrosion

CorroZone

A plain-language audio walk through the fundamentals of corrosion science and engineering — lecture by lecture, from CorroZone's Introduction to Corrosion course. From what corrosion actually is to the electrochemistry, forms, testing and control that every engineer needs. Free, no login. From CorroZone. Full courses here: https://corrozone.com/courses#udemy

  1. Episode 1

    Introduction to Corrosion Science and Engineering — Course Introduction

    Full courses here A short guided tour of the Introduction to Corrosion Science and Engineering course — how its four sections build from why metals corrode, through the electrochemical principles, to the forms of corrosion and how we protect against them. What this course covers The course is organised into four sections: Section 1 — Corrosion Fundamentals: why corrosion occurs, the forms of localised corrosion, and the electrochemical nature of aqueous corrosion (anodic and cathodic reactions, and how charge moves through metals and electrolytes). Section 2 — Electrochemical Principles & Corrosion Kinetics: Faraday's law, reference-electrode potential measurements, the Nernst equation, Pourbaix / current–potential / Evans diagrams, and rate-limiting effects such as diffusion and oxygen reduction. Section 3 — Forms of Aqueous Corrosion. Section 4 — Corrosion Prevention & Protection Systems. Who this is for Anyone beginning their study of corrosion — students, engineers, and technical staff who want a solid foundation in why metals corrode and what can be done about it. No prior background assumed.

    6 min

  2. Episode 2

    01 · Introduction to Section 1: Corrosion Fundamentals

    Full courses here Sets the scene for Section 1: the economic and societal scale of corrosion, why metals are thermodynamically driven back to their oxidised states, and the four fundamentals topics ahead. What you'll learn Appreciate the economic and societal scale of corrosion damage Understand that corrosion results from a thermodynamic driving force to return metals to stable oxidised states Identify the four major topics covered in Section 1 Recognise the four-section structure of the course and the progression from fundamentals to protection Who this is for Anyone beginning their study of corrosion — students, engineers, and technical staff who want a solid foundation in why metals corrode and what can be done about it. No prior background assumed.

    5 min

  3. Episode 3

    02 · Why Corrosion Occurs

    Full courses here The thermodynamic driving force behind corrosion, the difference between dry and aqueous corrosion, how corrosion is classified by mechanism and form, and the factors that control how severe it gets. What you'll learn Explain the thermodynamic driving force for corrosion in terms of Gibbs free energy and electrode potential Distinguish high-temperature (dry) corrosion from aqueous (electrochemical) corrosion Classify corrosion by mechanism (chemical vs. electrochemical) and by form (uniform, localised, environmentally assisted cracking) Identify the four categories of factors that influence corrosion severity and describe how they interact Who this is for Anyone beginning their study of corrosion — students, engineers, and technical staff who want a solid foundation in why metals corrode and what can be done about it. No prior background assumed.

    13 min

  4. Episode 4

    03 · Types of Localised Corrosion

    Full courses here A tour of localised corrosion — pitting, crevice, galvanic, intergranular and stress corrosion cracking — how each starts and spreads, and why concentrated attack is harder to predict than uniform corrosion. What you'll learn Distinguish uniform corrosion from localised corrosion and explain why localised forms are more dangerous Describe the autocatalytic initiation and propagation mechanism of pitting corrosion Explain how crevice geometry drives oxygen depletion and acid-chloride evolution inside an occluded space Apply the galvanic series and area ratio concept to predict galvanic corrosion severity Identify intergranular corrosion and stress corrosion cracking as distinct localised forms and state their defining conditions Explain why localised corrosion is harder to predict and monitor than uniform corrosion List the three categories of factors that promote localisation: geometry, composition gradients, and passive film breakdown conditions Who this is for Anyone beginning their study of corrosion — students, engineers, and technical staff who want a solid foundation in why metals corrode and what can be done about it. No prior background assumed.

    26 min

  5. Episode 5

    04 · Electrochemical Nature of Aqueous Corrosion

    Full courses here Why aqueous corrosion is electrochemical, not just chemical: the four parts of a corrosion cell, why anodic and cathodic sites form on one surface, and how the electrolyte's conductivity, pH and chloride drive it. What you'll learn Explain why aqueous corrosion is an electrochemical rather than purely chemical process Identify and describe the four essential components of a corrosion cell Explain why anodic and cathodic sites develop on the same metal surface List at least three sources of local potential variation that create anodic/cathodic sites Describe the role of the electrolyte in completing the corrosion circuit Explain how electrolyte conductivity, pH, and chloride content affect corrosion behaviour Articulate why the electrochemical nature of corrosion enables electrical measurement and control Who this is for Anyone beginning their study of corrosion — students, engineers, and technical staff who want a solid foundation in why metals corrode and what can be done about it. No prior background assumed.

    19 min

  6. Episode 6

    05 · Anodic and Cathodic Reactions

    Full courses here The half-reactions that drive corrosion — metal dissolution at the anode, oxygen reduction and hydrogen evolution at the cathode — how they shift local pH, and how they combine to corrode iron in water and in acid. What you'll learn Write the anodic half-reaction for metal dissolution and identify the products Identify the dominant cathodic reaction in aerated neutral water and explain why Write the oxygen reduction and hydrogen evolution half-reactions with correct stoichiometry Explain how oxygen reduction raises local pH at cathodic sites Explain how metal-ion hydrolysis lowers local pH at anodic sites Apply charge conservation to relate anodic and cathodic currents at steady state Predict which cathodic reaction dominates given information about pH and dissolved oxygen Describe the full corrosion mechanism for iron in aerated neutral water and in dilute acid Who this is for Anyone beginning their study of corrosion — students, engineers, and technical staff who want a solid foundation in why metals corrode and what can be done about it. No prior background assumed.

    22 min

  7. Episode 7

    06 · Charge Transport in Metals and in Solutions (Electrolytes)

    Full courses here How charge actually moves in a corrosion cell: electron conduction through the metal versus ionic conduction through the electrolyte, what controls each, and why electrolyte conductivity and ohmic drop govern the corrosion current, its spatial distribution, and electrochemical measurement. What you'll learn Explain how electrons are transported through a metal and how this differs fundamentally from ionic transport in an electrolyte Define electrical conductivity and resistivity and state typical values for metals and common electrolytes Describe how current flows in a complete corrosion cell, identifying the electronic and ionic segments of the circuit Explain why temperature has opposite effects on metal conductivity (decreases) and electrolyte conductivity (increases) Explain how electrolyte conductivity affects both the total corrosion current and its spatial distribution Define ohmic drop and explain its significance in electrochemical measurements and cathodic protection Who this is for Anyone beginning their study of corrosion — students, engineers, and technical staff who want a solid foundation in why metals corrode and what can be done about it. No prior background assumed.

    21 min

  8. Episode 8

    07 · Introduction to Section 2: Electrochemical Principles and Corrosion Kinetics

    Full courses here A short roadmap to Section 2: the quantitative electrochemical tools ahead — from Faraday's law through the Nernst equation, Pourbaix and Evans diagrams — and how they build on the qualitative foundation laid in Section 1, distinguishing thermodynamic from kinetic analysis. What you'll learn Identify the quantitative electrochemical tools covered in Section 2 Understand the logical progression from Faraday's law through Evans diagrams Articulate the distinction between thermodynamic and kinetic analysis tools Recognise how Section 2 tools build on the qualitative foundation of Section 1 Who this is for Anyone beginning their study of corrosion — students, engineers, and technical staff who want a solid foundation in why metals corrode and what can be done about it. No prior background assumed.

    6 min
See All Season 1 (27)

About

A plain-language audio walk through the fundamentals of corrosion science and engineering — lecture by lecture, from CorroZone's Introduction to Corrosion course. From what corrosion actually is to the electrochemistry, forms, testing and control that every engineer needs. Free, no login. From CorroZone. Full courses here: https://corrozone.com/courses#udemy

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