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- Title
Untersuchungen zum korrosionsauslösenden Chloridgehalt an nicht rostendem ferritischem Betonstahl in Mörtel.
- Authors
Ebell, Gino; Burkert, Andreas; Günther, Tobias; Wilsch, Gerd
- Abstract
Determination of the corrosion‐inducing chloride content of stainless ferritic reinforcing steels in mortar The corrosion protection mechanism for stainless steel in concrete is different than for unalloyed steel. In carbonated concrete, stainless steels are in a passive state and do not have any uniform corrosion. The chloride content for the initiation of pitting corrosion on stainless steels in concrete depends not only on the content of alloying elements (above all chromium) and the surface condition. It also depends on the concentration ratio between OH– and Cl– in the electrolyte. It can be expected that lower chloride contents can initiate corrosion in carbonated concretes than in concretes with higher pH values. This ap‐plies especially to stainless steel with low chromium contents such as products made of the material 1.4003 (X2CrNi12). In order to determine the critical corrosion‐inducing chloride content using the example of a pickled ferritic chromium steel available on the market, extensive laboratory tests were carried out at the Federal Institute for Materials Research and Testing (BAM). In accelerated corrosion tests in alkaline and carbonated mortars, the critical chloride contents in the phase boundary between reinforcing steel and mortar were determined and evaluated by means of laser induced breakdown spectroscopy (LIBS).
- Subjects
MATERIALS testing; LASER-induced breakdown spectroscopy; FERRITIC steel; STAINLESS steel corrosion; STAINLESS steel; STEEL corrosion
- Publication
Bautechnik, 2020, Vol 97, Issue 1, p21
- ISSN
0932-8351
- Publication type
Article
- DOI
10.1002/bate.201900077