| Abstract: | The electrochemical behaviour of weld seams On the basis of reproducible electrochemical tests in macro and micro ranges a correlation is derived between electrochemical data and the corrosion behaviour of weld seams of steels of different compositions and aluminium welded with dissimilar fillers. In austenitic welds differences of the rest potential may give rise to the formation of local elements, and in passive welds there may exist active zones showing pitting and intercrystalline corrosion. The area and location of the active and passive region can be defined by current density potential curves. The susceptibility to selective corrosion is established by measurements on micro regions. |
