A new method for prediction of corrosion processes in Aluminum housing materials for electronic components

Abstract

We developed a method based on potentiostatic measurements which allows corrosion sensitivity analyzes of coated Aluminum housings in a very short time. Using a NaCl electrolyte combined with electrical potential accelerates the corrosion reaction and initiates typical application related corrosion processes. In this paper we will present and discuss our method for corrosion testing in correlation to the standard salt spray test. Furthermore high resolution microstructural analyzes are giving evidence for the running corrosion process. We will show microstructural results by Scanning Electron Microscopy (SEM) and element analyzes (EDS) for samples potentiostatic tested. Finally the corrosion processes induced will be compared and discussed.