Material Definition

It would seem, after these many years of using nominally well established materials, that there is nothing new. Users should simply purchase materials off the shelf and expect that they would perform satisfactorily. It should be enough that use of existing specifications and codes would assure satisfactory performance. Despite such nominal assurances, failures of well established materials in nominally innocuous environments continue to occur.

Defining a material is not about new, complex materials. While these materials need definition, "defining materials" is about ordinary materials like low alloy steels, stainless steels, copper alloys and aluminum alloys.

Defining materials is about the definition of those aspects that affect the modes of corrosion. Specific aspects that need definition are the following and as illustrated in Figure 3.

Lifetime Prediction, Roger W. Staehle, Adjunct Professor, Department of Chemical Engineering and Materials Science, University of Minnesota, Staehle Consulting Co.