Modelling on the Evolution of Corrosion Pit During Stress Corrosion

Junquan LI


Corrosion pit always changes its shape and size during stress corrosion. The actual morphology of pit is the outcome of the interaction between the variation in the elastic energy induced by far-field stress, surface energy of pit surface and electrochemical energy stored in the stressed solid. Based on the semi-ellipsoidal pit assumption, an explicit expression that controls the evolving morphology of pit is introduced, from which the effects of specific parameters to pit morphology are studied. According to the stress intensity factor criterion for pit transition to crack, the crack nucleation life is also discussed.


Aluminium; Modelling studies; Stress corrosion; The crack nucleation life

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