Reationship between corrosion potential and diferent corrosion forms of metals, alloys and theirs 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 is 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 meausred corrosion potential value. It is also shown that different metallurgical and corrosion states of aluminim 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).

U ovom radu opisana je veza između korozionog potencijala i različitih vidova korozije metala i njihovih zavarenih spojeva. Pored toga, opisana je priroda korozionog potencijala i postupak njegovog merenja.Na jednostavan način pokazano je kako se na osnovu vrednosti korozionog potencijala može odrediti sklonost zavarenih spojeva aluminijumskih legura i zavarenih spojeva ugljeničnih čelika prema galvanskoj koroziji. Takođe je pokazano kako sena osnovu merenja korozionog potencijala mogu odrediti različita metalurška i koroziona stanja aluminijumskih legura, kao i sklonost zavarenih spojeva nerđajućih čelika prema interkristalnoj koroziji. Zbog velikog broja primena merenja korozionog potencijala, rad je podeljen na dva dela (deo I i deo II).