Crevice Effect During Polarization of Ti-8Al-1Mo-1V Alloy in Aqueous and Methanol Environments Available to Purchase

When a potential is applied to a specimen containing a crevice or crack, the potential at the crack apex may be quite different from the polarization potential at the crack exterior. Experimental studies with an artificial crack assembly have shown that the crevice effect becomes pronounced when an electrochemical reaction causing a high IR drop occurs in the crevice; however, if the specimen remains passive, the current is small and the crevice effect will be negligible. The present experiments show that the crevice effect will be controlled by the electrolyte characteristics and the electrochemical reaction current.