Pitting Corrosion Failure Behavior of Aluminum Alloy Structure Material for Aviation Equipment

The researches on the two key links ofcorrosion fatigue behavior of aluminum alloy materialsfor aviation equipment, pitting corrosion and fatigue crack initiation from corrosion pits, were reviewed. The study methods on the pitting corrosion initiation mechanism, the influence factors of pitting corrosion behavior, and the behavior of fatigue crack initiation from corrosion pits wereintroduced, and the study conclusions on fatigue crack initiationmechanism from corrosion pits were summarized. It is believed that the essence of aluminum alloy pitting corrosion is the random electrochemical behavior influenced by many factors,such as environment,micro-factors,load, and so on,and pitting corrosion damage can be described by its geometric size,pitting corrosion rate,weight loss rate and other indicators.Crack initiation behavior from pitting corrosion damage under fatigue load can be studied by in-situ observation and fracture analysis, and it is influenced by pitting corrosion pattern, load, and microstructure of material. Accordingly, the future research trend was pointed out. The future research should focus on new aeronautical aluminum alloy materials. Pitting corrosion experiment should simulate the service environment of equipment, andquantitative analysis should be highlighted in studyingthe crack initiation behavior.