Читать книгу Corrosion Policy Decision Making - Группа авторов - Страница 37

Science of corrosion is based on understanding three main elements: what metal liberates electrons (thus becomes an anode and is consumed), which material takes electron (and becomes a cathode), and what fluid ions can move through easily. It follows, then, anything that can interrupt one or all of these elements is highly likely to affect corrosion and control it. If, for example, paint (more correctively, coating) is applied, then anode and cathode will not see each other or anode–cathode will be isolated from the external electrolyte; the former will not allow electron transfer and the latter will not allow ion exchange.

In this chapter, three main methods for corrosion prediction (SHE, Galvanic series, and Pourbaix doagrams) as well as categorizing five technical managements of corrosion have been briefly explained. In addition to a short description of each of the five categories, a rather detailed explanation about materials selection and paints has been given to allow the readers a feeling of some of the difficulties involved in technical treatment strategies to deal with corrosion.