Heterogeneous Electrode Processes and Localized Corrosion

Sheds new light on the significance of electrode inhomogeneity and electrochemical heterogeneity

A major contribution to the field of electrochemistry, this book--based on a thorough review of the literature and author Yongjun Tan's twenty years of pioneering research--examines electrochemical heterogeneity and its effects on non-uniform electrode processes. The book focuses on localized corrosion, uneven electrodeposition, and non-uniform electrodissolution. Readers will learn all the core fundamentals, experimental methods, and engineering aspects of localized corrosion and other important heterogeneous electrode processes. In particular, readers will learn core methods to quickly calculate corrosion rates and study electrode inhomogeneity and electrochemical heterogeneity.

Heterogeneous Electrode Processes and Localized Corrosion begins with a review of homogeneous electrode models and uniform corrosion measurements and then explores probing electrode inhomogeneity, electrochemical heterogeneity, and localized corrosion. Next, the book examines:
* Visualizing localized corrosion using electrochemically integrated multi-electrode arrays
* Measuring thermodynamic and kinetic parameters of localized corrosion processes
* Characterizing inhomogeneity and localized corrosion on coated electrode surfaces
* Designing experiments to study localized corrosion and its inhibition in inhomogeneous media
* Sensing localized electrodeposition and electrodissolution
* Exploring versatile heterogeneous electrode processes

Throughout the book, there are case studies with maps that illustrate key aspects of heterogeneous electrode processes. In addition, the author provides plenty of examples that enable readers to fully grasp core concepts of electrochemical heterogeneity and its relationship to non-uniform electrode processes.

Reviewing the experimental findings presented in this book, electrochemists will gain a better appreciation and understanding of the fundamental significance of electrode inhomogeneity and electrochemical heterogeneity.

This book covers the areas of electrochemical heterogeneity and electrode inhomogeneity and their effects on nonuniform electrode processes, in particular, localized corrosion.  It covers the fundamentals, experimental methods, and engineering aspects of electrochemical heterogeneity.  The book provides examples of electrochemical heterogeneity in localized corrosion, uneven electrodeposition, nonuniform electrodissolution, inhomogeneous surface coatings, electrochemical noise phenomenon, and kinetic, thermodynamic or other forms of dispersion observable in voltammetry. The book also includes examples of various forms of localized corrosion: Galvanic corrosion, intergranular corrosion, selective leaching, pitting corrosion, crevice corrosion, erosion corrosion, localized coating failure, stress corrosion and hydrogen attack etc.  The book covers methods used to determine how localized corrosion rates can be calculated quantitatively and quickly and covers traditional methods including optical (OM) and scanning electron microscopy (SEM) and emerging techniques such as electrochemical noise analysis have been used to determine localized corrosion rates.   The book also discusses the methods for monitoring patterns of localized corrosion such as scanning microreference electrode (SMRE) technique and the scanning Kelvin probe analysis which are used to map potential differences over an electrode surface and, thus, to detect localized corrosion patterns. The book also covers the limitations of traditional electrochemical techniques used in studying the corrosion kinetics of practical corrosion systems. Many traditional electrochemical techniques are based on a uniform electrochemical mechanism, however uniform corrosion is rarely observed in practical corrosion testing. Instead nonuniform corrosion patterns are most common suggesting that in most practical corrosion systems traditional electrochemical techniques are not strictly valid. Special attention is given to electrochemically integrated multi-electrode array namely the wire beam electrode, a tool used in measuring, characterizing, and evaluating localized corrosion