Abstract: A lot of experiments have indicated that the loading frequency f is one of the improtant factors that affect the fatigue crack growth rate under the corrosive environment.So both microeffects and macroeffects of loading frequency f on the corrosion fatigue are studied by experiment research and theoretical analysis.And a mathematical model of corrosion fatigue crack growth rate da/dN-(ΔK,f) is derived.This mathematical model will make it possible that the corrosion fatlgue crack growth rate of aeronautical materials and service life of aeroplane under corrosive aneironment are determined by computer simulation.

Key words: corrosion fatigue, passivity, mathemet ical model