Die Bedeutung der metastabilen Lochkorrosion bei hochlegierten Stählen

The importance of metastable pitting corrosion in the case of high alloy steels A suitable computer-aided experimental method allows during potentiostatic tests to recognize and quantitatively treat current transients. The current transients result from metastable pitting phenomena below the pit propagation potential. It is possible under certain conditions to detect metastable pitting which in the SEM appears in the form of small (approximately 1 μm), in most cases hemispherical pits. A detailed study of metastable pitting has brought about fundamental knowledge about the mechanism of pit initiation, stable pit growth and repassivation in pitting and crevice corrosion processes.