Description

Electrocorrosion, the corrosion of metallic constructions by external currents, is the most significant factor in conductive aggressive environments. Corrosion of underground and underwater metal constructions by stray currents has been comprehensively studied in the past decades and is considered here only in the form of a review. The primary attention is on corrosion, by external anodic (mainly) and cathodic currents, of metal constructions in the highly aggressive environments typical for electrochemical plants, where penetration of the external currents (leakage currents) from the electrolytic baths into metal constructions is unavoidable.
 
A new approach to the problem of electrocorrosion protection of passive structural metals is considered in this book,  keeping the metals attacked by external currents in the boundaries of their passive field. The systems, developed in accordance with this approach, are based on the modification of existing and elaboration of new methods of electrocorrosion protection. These systems take into account corrosion and electrochemical characteristics of the aggressive media (redox potential, conductivity etc.) and of the passive metal (corrosion and activation potentials, current density in a passive state, etc) as well as the sizes and distribution character of the external currents.

The book covers analysis of leakage current distributions in electrochemical plants, their influence, methods to estimate corrosion stability of metallic structures subject to external currents and presents many concrete examples of the successful introduction of corrosion protection systems in operating plants.

Key Features

  • A new approach to protection from electrocorrosion, taking into account the passive state of the metal in aggressive media
  • Newly developed and modifications of well known methods of electrocorrosion protection are presented.
  • Systematized data on electrocorrosion and protection of metals, especially in electrochemical plants, allow corrosion engineers, researchers and personnel maintaining the equipment of electrochemical plants to analyze the corrosion state of  metallic equipment and prevent electrocorrosion.

Readership

University and Industrial Libraries with Research Centers on Corrosion and Materials Science. Chemical, Petrochemical Industries.Metallurgists.

Table of Contents

Preface.
Introduction: Corrosion and electric current – 200 years together.
1. Dependence of the corrosion behavior of metals attacked by an external current on their initial state.

1.1. State of metals in aggressive media in the absence of attack by external currents
1.2. Polarization of metals
1.3. Attack of external anodic current on actively corroding metals
1.4. Attack of external anodic current on passive metals
1.5. Attack of external anodic current on thermodynamically stable metals
1.6. Attack of external cathodic current on metals
1.7. Attack of external alternating current on metals
1.8. External current as a factor of the aggressiveness of the environment
2. Corrosion and protection of underground and underwater structures attacked by stray currents.
2.1. Main media, sources of stray currents and objects of their corrosive attack
2.2. Methods of detection and control of stray currents
2.3. Metal corrosion by stray currents
2.4. Protection of metals against corrosion attack by stray currents
2.4.1. Measures for reducing stray currents
2.4.2. Protection of underground structures by electrodrainage
2.4.3. Cathodic protection
3. Operating features of electrochemical plants.
3.1. General characteristics of electrochemical plants
3.2. Leakages currents in electrochemical plants
3.2.1. Sources of leakage currents, concepts and problems connected with them
3.2.2. Methods of measuring and controlling of leakage currents
3.2.3. Magnitudes and distribution regularity of leakage currents along the lines of Electrochemical cells
3.3. Aggressive media
4. Using structural metallic materials in electrochemical plants without taking into account attack by leakage currents.
4.1. Non-metallic materials
4.2. Traditional metallic materials
4.3. Experience in the field of titanium application
4.3.1. Precondi

Details

No. of pages:
264
Language:
English
Copyright:
© 2009
Published:
Imprint:
Elsevier Science
Print ISBN:
9780444532954
Electronic ISBN:
9780080933009

Reviews

"This volume is essential for chemical engineers and chemists that design, construct and operate electrochemical plants. Also, maintenance personnel, including materials and mechanical engineers, will benefit from reading, using and owning this compendium, in their daily endeavors. University lecturers and researchers will use it for undergraduate and postgraduate students preparing their theses on industrial corrosion. Electrochemical industry directors and executives should distribute it to the managers and engineers of their plants, to apply it in monitoring and controlling electrocorrosion. We hope that the book will encourage the corrosion community to employ the concepts and the methods that the author has so convincingly presented, to combat electrocorrosion."--Corrosion Engineering, Science and Technology 2010 VOL 45 NO 4 249

"Throughout the book, each chapter is packed with learned references but mainly from the past experience of the author in the Soviet Union without modern up-to-date references from the electrochemical industry in other advanced countries. This volume is essential for chemical engineers and chemists that design, construct and operate electrochemical plants. Also, maintenance personnel, including materials and mechanical engineers, will benefit from reading, using and owning this compendium, in their daily endeavors. University lecturers and researchers will use it for undergraduate and postgraduate students preparing their theses on industrial corrosion. Electrochemical industry directors and executives should distribute it to the managers and engineers of their plants, to apply it in monitoring and controlling electrocorrosion. We hope that the book will encourage the corrosion community to employ the concepts and the methods that the author has so convincingly presented, to combat electrocorrosion"--Corrosion Engineering, Science & Technology Journal         &