Relationship between corrosion potential and different corrosion forms of metals, alloys and their welded joints: Part I

Abstract

This paper briefly describes the relationship between corrosion potential and different corrosion forms of metals and their welded joints. The nature of corrosion potential and the method of its measurement are also described. It is shown in a simple way how the tendency of welded joints to galvanic corrosion can be determined on the basis of the measured corrosion potential value. It is also shown that different metallurgical and corrosion states of aluminum alloys can be evaluated using the measured value of corrosion potential. The tendency to intergranular corrosion in the welded joints of stainless steels can be predicted on the basis of corrosion potential. Due to a large number of corrosion potential measurement applications, this work is divided into two parts (Part I and Part II).