Development and construction of a measuring technique for a realistic evaluation of the crevice corrosion behaviour by way of aluminium alloys

Aluminium alloys represent a high percentage of materials used in aircraft. Complex designs such as those found in the aircraft industry illustrate a number of constructively determined geometrical crevices. As always the cre vice corrosion behaviour of materials is difficult to reconstruct and evalu ate in a laboratory. The authors present an experimental set up which refle cts the situation in constructively determined crevices. It will be shown, with the use of selected aluminium alloys, that a quite good evaluation of crevice corrosion behaviour of materials is possible. The acidification and enrichment of selected species can be observed very well and their reactio n on crevice corrosion can be semi-quantitatively estimated. The interpreta tion of the corrosion results is overall improved.