Fundamentals of Electrochemical Corrosion covers the underlying chemistry and materials science associated with the corrosion behavior of metals in aqueous environments. It begins with a review of corrosion processes and the reactions that occur in the interface area between the metal and corrosive media. It describes the basic elements of a corrosion circuit, the criteria for metal-solution reactions, and the effect of corrosion products. It discusses the thermodynamic principles governing the stability of metals in aqueous environments, the kinetics of metal-ion transfer, the role of diffusion, and the influence of solution velocity. It explains how to calculate corrosion rates and estimate corrosion potential and current density. It addresses practical issues such as galvanic coupling, cathodic protection, and the effect of anodic polarization on various metals and alloys. It also covers corrosion-rate measurements, localized and metallurgically influenced corrosion, environment-sensitive fracture, and corrosion fatigue. The book includes charts, graphs, tables, equations, and chapter review questions, and is appropriate for use in upper-level undergraduate and graduate instruction, professional education, individual study, and as a reference and data resource. For information on the print version, ISBN 978-0-87170-676-8, follow this link.

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The physical metallurgy of Ni -rich Ni-Mo alloys is reviewed. Three ordered intermetallic compounds can form in this system, which leads to some intriguing microstructures and has significant effects on properties. The understanding of the nature of these phases, how they are formed, and the factors responsible for property changes are summarized; areas needing further research are indicated. The phase relations and transformations in alloys containing approximately 20 at. -~oMowith Fe additions are reviewed, as these serve as the basis for some commercial alloys. The structures and properties of the commercial alloys are also reviewed.IMR/133 INTRODUCTIONThe physical metallurgy of Ni-Mo alloys is of interest and importance for several reasons. The phase transformations that occur in them generate spectacular microstructures, the study of which leads to a better understanding of principles important to all alloy systems; these structures significantly affect properties; and some of the compositions serve as bases for commercial alloys. Although there is an extensive literature on Ni-Mo alloys, this is the first review to give a perspective view of the state of understanding of these alloys. The transformationsinvolve short-rangeordered (SRO) and long-range-ordered (LRO) phases, which have been studied extensively using optical and electron microscopy, X-ray diffraction, and other techniques. (For reviews of the physical metallurgy and mechanical behaviour of ordered alloys, see Many of the characteristics of the kinetics and morphology of the transformations are well understood; however, there are areas of controversy and many features are yet to be explained, especially the correlation of structure and properties.

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