Lead


Lay summary
Corrosion is an important issue in materials science and engineering. It induces enormous yearly costs of approx. 2 - 5 % of the gross domestic product (GDP). Hence, a detailed understanding of corrosion mechanisms is fundamental for a reliable prediction of corrosion and the development of sustainable materials. The most critical corrosion problems are usually related to localized attack initiating at the weakest points (surface defects, inclusions, grain boundaries, segrega-tions or precipitates). Macroscopic -immersion tests are normally used to achieve elemental information during corrosion dissolution. Within the SNF 200021-109355 Project (MiCorrAna I) a novel analytical set-up was developed, consisting from a micro-flow-capillary, which is coupled via a flow injection system (FI) to an inductively coupled plasma mass spectrometer (ICP-MS). The device enables a preliminary local and time resolved in-situ investigation and an elemental dissolution monitor-ing during corrosion processes at the same time. Within this project, a further capillary minimization is planned as well as the implementation of an additional potentiome-ter control. The new analytical set-up should be applied to investigate corrosion processes e.g. of aluminum alloys with complex inter-metallic phases, amorphous Zr bulk metallic glasses or biodegradable magnesium alloys. The electro-chemical control enables to initiate and control specific corrosion processes (achieved by electrochemical polarization of a metal sample) and simultaneous monitoring of the elemental release by ICP-MS.