In this paper,a new improved method,which considers concrete creep and nonlinear behavior of concrete,is proposed to study the limit corrosion penetration of degraded concrete members.Finite element numerical analyses in means of ANSYS are carried out.The study shows that there are two main factors affecting the limit corrosion penetration,the ratio of the thickness of concrete cover to the diameter of rebar and the concrete strength,and the limit corrosion penetration will increase as the ratio and concrete strength increase.