Corrosion Characteristics and Properties of Metals

As discussed in the previous sections, the extent and form of corrosion occurring on a metal is predominantly dictated by the environmental conditions, and thus, the interaction of the metal with the surrounding environment. Some metals are inherently resistant to the effects of corrosion, while others are inherently susceptible. This section discusses the nature of the more common types of metals and alloys in terms of their corrosion characteristics and properties.

This is not a comprehensive evaluation of metals and alloys, however; these are general observations, and are not intended to provide complete guidance in materials selection. Instead, an investigation of literature should precede the selection of a material. The corrosion characteristics and properties of metals come from field experience and extensive testing in natural, simulated, and accelerated environments. The results of testing are used to rate materials and determine what alloying and heat treatments are beneficial to corrosion resistance. Field experiences, as well as test results, are used to document susceptibilities of materials under specific conditions. The following section uses information from both testing and field experience to facilitate the selection of metals for varying applications. The section is organized by the relative usage of the metal classes with the most widely used ferrous metals covered first.