Novel use of glow discharge optical emission spectroscopy (GDOES) to study corrosion of AA2024-T3 in the presence and absence of inhibitors - part 3: investigating the effects of various proportions of inhibitor in the coating matrix or in nanocontainers

摘要

Elemental depth profiling by glow discharge optical emission spectroscopy has been used to characterize the corrosion products on AA2024-T3. In previous work, the aluminium, oxygen and copper depth profiles were shown to provide information regarding surface roughening, the thickness of corroded layers and extent of copper de-alloying/ relocation. Nitrogen, sulfur, phosphorus and chromium depth profiles were examined in the hope of detecting inhibitor species within the corroded/altered layers after 5 h of exposure to a corrosive solution. In the present work, the study is extended to longer exposure time. The work presents a further study of the leaching of benzotriazole from the coating matrix or from nanocontainers during various times of exposure to a corrosive environment. Copyright (C) 2016 John Wiley & Sons, Ltd.