This article is a compilation of binary alloy phase diagrams for which cerium (Ce) is the first named element in the binary pair. The diagrams are presented with element compositions in weight percent. The atomic percent compositions are given in a secondary scale. For each binary system, a table of crystallographic data is provided that includes the composition, Pearson symbol, space group, and prototype for each phase.

Chromate conversion coatings (CCCs) are primarily used to improve adhesion of subsequently applied organic coatings or to impart corrosion resistance during atmospheric exposure. This article describes the factors that affect the formation of CCCs. It provides information on the processing sequence, morphology, composition, and properties of CCCs. The article discusses the electrochemical impedance spectroscopy approach used for evaluating conversion coatings. The test methods for various CCCs properties are also reviewed. The article examines the various coatings associated with chromate-free conversion. These include: titanium and zirconium fluorocomplexes; cerium-base, manganese-base, cobalt-base, and molybdate-base conversion coatings; hydrotalcite coatings; and organic coatings.