TY - JOUR A1 - Bender, S. A1 - Goellner, J. A1 - Heyn, Andreas A1 - Schmigalla, S. T1 - A new theory for the negative difference effect in magnesium corrosion T2 - Materials and corrosion N2 - An unusual feature known as the negative difference effect (NDE) can be observed in magnesium when recording corrosion current density–potential curves. More hydrogen is evolved at a more positive potential which does not occur in conventional metals. Several models have been proposed in the literature in order to explain the phenomenon of NDE. They succeed in explaining some effects, and fail to deal with others. A new model, which explains the NDE by two electron consuming processes, is presented in this paper. By potentiostatic investigations of magnesium in a chloride electrolyte, measurements of hydrogen evolution and chemical analysis of the electrolyte the new model was experimentally verified. PB - Wiley-VCH Verl. CY - Weinheim KW - Magnesium KW - Negativer Differenzeffekt KW - Korrosion KW - Korrosionsmechanismus KW - Current density-potential-curve KW - Magnesium alloys KW - Magnesium corrosion KW - Negative difference effect KW - Polarization measurements PY - 2012 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/25162 AN - OPUS4-25162 SN - 0947-5117 SN - 1521-4176 VL - 63 IS - 8 SP - 707 EP - 712 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany