Electrocorrosion and Protection of Metals

Dr. Riskin has his M.Sc. in Chemical Engineering and Ph.D. in Corrosion and Protection of Metals, Consulting on corrosion protection of metals and failure analysis. Dr J. Riskin during 15 years was a head of laboratory "Protection of metals against electrocorrosion? in Moscow Corrosion Institute, Russia. In Israel (Haifa) his activity also included this field.

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.

PrefaceIntroduction1. Dependence of the corrosion behavior of metals attacked by an external current on their initial state2. Corrosion and protection of underground and underwater structures attacked by stray currents3. Operating features of electrochemical plants4. Using structural metallic materials in lectrochemical plants without taking into account attack by leakage currents5. Corrosion behavior investigations of traditional structural metallic materials in electrochemical plant media, taking into account attack by leakage currents6. Corrosion behavior investigations of titanium and its alloys in the media of electrochemical plants, taking into account the attack by anodic leakage currents7. Hydrogenation and corrosion investigations of titanium under attack by an external cathodic current8. Estimation of corrosion stability of structures made of passive metals in aggressive media, in the field of an external current9. Electrocorrosion protection of metals in electrochemical plants based on existing methods10. New principles of protection of passive metals against electrocorrosion in electrochemical plants11. Electrodes for metal protection against corrosion attack by external currents in electrochemical plants12. Industrial tests and the introduction into electrochemical plants of developed methods for the protection of metals against corrosion attack by leakage currentsReferencesIndex