Influence of plastic deformation on the corrosion behaviour of as-cast AlMg_2 and AlCu_4Mg_1 aluminium alloys in NaCl solution

摘要

The influence of plastic deformation on the corrosion behavior of as-cast AlMg_2 and AlCu_4Mg_1 aluminum alloys was studied at the microscale using the Electrochemical Microcell Technique and surface microgauges. It was shown that large strain gradients develop locally. The corrosion behavior of both alloys was affected by plastic deformation. The most active sites contain large strain gradients in AlMg_2 and cracks with damage in the matrix in AlCu_4Mg_1.