材料期刊网

Image analysis of periodic rain accelerated corrosion of aeronautical aluminium alloys

Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing

Periodic rain tests have been carried out for simulating atmospheric corrosion of aeronautical aluminium alloys. A digital image preprocessing and analysis method based on wavelet transformation was used to study the corrosion morphology of aluminium alloys samples, through which an image feature parameter 8 was extracted and discussed. The influences of orthogonal experiment parameters on acceleration were analyzed according to image feature parameter 6 with analysis of variance (ANOVA) method, and the optimal parameters for accelerated corrosion test were also obtained. The result was shown to be consistent with that from weight loss method. (c) 2007 Elsevier B.V. All rights reserved.

关键词: aeronautical aluminium alloys;accelerated corrosion;linage analysis;simulated environment;atmospheric corrosion;electrochemical impedance;pitting corrosion;exposure;steel;zinc