Multiple Forms of Corrosion

There are a vast number of material/operational environment combinations, and each can form the basis for potential corrosion problems to occur. Of the 103 plus elements in a Periodic Table in App. B, approximately 80 are metals, each possessing different mechanical, chemical, and physical properties. Although all these metals can corrode, they do it in many different manners. Furthermore, most of these metals have been alloyed to make tens of thousands of different alloys. 

From a purely technical standpoint, an obvious answer to corrosion problems would be to use more resistant materials. In many cases, this approach is an economical alternative to other corrosion control methods. Table 11.1 lists the questions that should be answered in order to estimate the corrosion behavior of materials either in service or considered for such usage [5], 

A common form of representing the corrosion resistance of materials is what is known as isocorrosion diagrams. The use of the prefix iso refers to lines (or regions) of constant corrosion behavior across variations in concentration and temperature. The diagram shown in Fig. 11.2 illustrates how some stainless steels compare to 

What effect wiii uniform corrosion have on serviceability  

Are size change, appearance or corrosion product a problem  

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