Stress corrosion cracking and passive film-induced tensile stress in alpha-Ti

alpha -Ti foil with a protective layer formed on one side was deflected dur ing corrosion in a methanol solution containing 0.6 mol/L KCl and then a te nsile stress was generated at or near the metal passive film interface. The in situ TEM observation showed that corrosion process could facilitate dis location emission and motion. Adding 10% H2O into the methanol solution dec reased the passive film-induced stress from 320 MPa to zero, and the suscep tibility to SCC measured in slow strain rate tests decreased correspondingl y from 98% to zero.