Modelling Of Cathodic Protection Systems

Provides an introduction to the state-of-the-art in computer modelling of corrosion and related electrochemical processes. Aimed at corrosion engineers, physicists, and model developers, this book contains contributions from the researchers and developers of corrosion modelling tools and users who apply the technology in their industry.

Seven papers summarize the main design philosophies for cathodic protection systems to protect structures and ships from the corrosive effects of seawater. The topics include the slope parameter approach and its application to impressed current systems, the relationship of chemical components and im

Cathodic protection (CP) mitigates the high cost of steel and other alloys corroded in seawater and seabed sediments. Marine Corrosion and Cathodic Protection is a comprehensive guide to corrosion issues and presents methodologies to tackle common offshore code-based CP designs. Advanced theory is developed for non-routine CP applications, with and without subsea coating systems. The interactions between CP and the fatigue and hydrogen embrittlement characteristics of alloys are explained. Sacrificial (or galvanic) anodes and impressed current systems are examined, followed by descriptions of successful and unsuccessful applications on petroleum installations, harbours, jetties, pipelines, windfarm foundations, ships and floating production storage and offloading vessels FPSOs. Retrofit CP systems for the life extension of assets, together with methods for applying CP internally in both static and flowing systems are evaluated. A critical review of the role of physical and computational modelling in CP design and evaluation addresses the more geometrically complex applications. Techniques for, and limitation of, CP surveying, inspection and monitoring are explained in the context of system management. This text is ideal for engineers, designers, manufacturers, equipment suppliers and operators of offshore CP systems.

This book contains papers presented at the Second International Conference in this successful series, which presents and discusses the state-of-the-art on the computer simulation of corrosion, electrochemical processes and the electrical and electromagnetic fields associated with them.Modern industry applies a wide range of electrochemical processes to protect against corrosion, provide surface treatments and to manufacture products. This book focuses on the computer modelling of these industrial processes and techniques by examining the developments of computational models and their application in practice.Featured topics include: Cathodic Protection Systems; Modelling Methodologies; Electrodeposition and Electroforming; Modelling of Coatings; Modelling Stress Corrosion, Cracking and Corrosion Fatigue; Modelling and Corrosion of Surface Coatings; Interference and Signature Control; Anodic Protection; Electrocoating and Plating; Optimisation of Control Systems; Detection and Monitoring of Corrosion; Measurement Techniques; Fuel on Photovoltaic Cells; Electrolysis Reactors; Comparison of Experimental Measurements and Computer results, Case Studies.

Corrosion is a degrading material process frequently encountered in engineering structures and components, which may lead to costly and catastrophic failures if not properly and timely addressed. This volume describes a wide spectrum of experimental and analytical studies, which provide a fairly comprehensive account of corrosion manifestations and methodologies for addressing them in structural and industrial design. As such, it is expected to make a valuable reference publication for engineers and scientists interested in the protection of structures and components from harmful and potentially ruinous corrosive action. The collected articles comprising this volume address issues which can be categorised into two main areas. The first is concerned with material science approaches to corrosion, that is, visual or instrumental means of assessing existing behaviour or effectiveness of corrective measures and techniques. The second part of the volume comprises boundary element simulations of cathodic protection schemes for the purpose of predicting and optimising their performance. A number of practical problems are analysed such as: the coating condition on a ballast tank wall; the impressed current cathodic protection of an offshore platform and minimizing a ship’s electric and magnetic signature. Topics covered include: Elemental identification; Material loss; Strain fields; Stress corrosion cracking; Corrosion resistance; Fretting corrosion; Contact surface damage; Electrochemical testing; Coating conditions; Cathodic protection; Current density distribution; Pipelines and deep well casings; Electric and magnetic signatures; Coating damage effects; Galvanic corrosion.

All significant studies agree that aqueous corrosion continues to cost nations dearly in almost every area of technological endeavour. Over the past ten years, microcomputers have facilitated an explosion in the power of modelling as a technique in science and engineering. In corrosion they have enabled better understanding of polarization curves, they have transformed the scope of electrochemical impedance measurements and they have placed a large range of electrochemistry at the fingertips of the corrosion scientist. This book focuses on the models, rather than the computing, which have been made possible during the past decade. Aimed at all those with an interest in corrosion and its control, the book draws together the range of new modelling strands, suggests new avenues of approach and generates further momentum for improvements to corrosion management, whether by increased understanding of atomistic processes or by control of large plant.