Long‐term atmospheric corrosion of Cr‐free painted aluminum alloys during outdoor worldwide exposures

Cr-free paints applied on different aluminum alloys were exposed for 5 years at atmospheric weathering sites worldwide. By image analysis, the extent, and type of corrosion (filiform or blistering) determined after 1, 2, years. In that way, it was possible to rank systems as a function their resistance corrosion. The kinetics degradation each system all also determined. From results, is shown dependent. It combination several climatic parameters which contributes corrosivity site not only one single parameter such chloride deposition, relative humidity, so on.