TY - JOUR A1 - Beck, Matthias A1 - Goebbels, Jürgen A1 - Burkert, Andreas A1 - Isecke, Bernd A1 - Bäßler, Ralph T1 - Monitoring of corrosion processes in chloride contaminated mortar by electrochemical measurements and X-ray tomography T2 - Materials and corrosion N2 - Corrosion of steel reinforcement in concrete exposed to chloride containing environments is a serious problem in civil engineering practice. Electrochemical methods, e.g., potential mapping, provide information whether the steel reinforcement is still passive or depassivation has been initiated. By applying such techniques no information on the type of corrosion, its extent and distribution of corrosion products is available. Particular the corrosion progress is a significant problem. Especially in the case of macrocell corrosion in reinforced concrete structures, the development at the anode cannot be separated into corrosion damage resulting from macrocell corrosion or self-corrosion. Until now also in laboratory tests it is impossible to collect such information without destroying specimens after electrochemical testing was performed. To overcome this problem it was tried to study the steel surface within the mortar specimens by X-ray tomography (CT). Within the scope of these investigations it could be shown, that X-ray tomography is suitable to make corrosion pits and their development visible which are embedded in a mortar with a cover thickness of about 35 mm. In this publication the time-dependent corrosion damage of reinforced steel is documented by X-ray tomography. PB - Wiley-VCH Verl. CY - Weinheim KW - Self-corrosion KW - X-ray tomography KW - Concrete parameters KW - Contaminated mortar KW - Electrochemical measurements KW - Pitting corrosion PY - 2010 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/22848 AN - OPUS4-22848 SN - 0947-5117 SN - 1521-4176 VL - 61 IS - 6 SP - 475 EP - 479 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany