Modelling and Prediction in Failure Processes by Mechanical Stresses in Corrosive Environment

Résumé

The complex interaction effect of mechanical stress- mechanical systems and aggressive environment, leads, at dramatic decreasing of their durability and reliability. The analyze of physical-chemical processes such as: electrode potential evolution, anodic current density evolution, size evolution and growing speed of cracks, allow finding common characteristics of failure due to mechanical stress combined with aggressive environment. Based on the analyze of failure mechanisms by stress cracking corrosion (monotonic mechanical loading), fatigue corrosion (cyclic mechanical loading) and tribocorrosion the paper authors suggest a global model of this kind of failure, based on degradation process of stress cracking corrosion with capability to realize a prediction of damage by these processes.