What is it about?
The reactivation of a corrosion pit under the synergetic effect of strain and electro-chemical polarisation has been observed in a type 304L stainless steel using X-ray computed tomography. The pit reactivation process was associated with the formation of a new pit, directly adjacent to a pre-existing pit. Pit growth kinetics were estimated, revealing an increase of the diffusivity parameter (D-eff Delta C) from 3.0 x 10(-8) mol cm(-1) s(-1) to 4.5 x 10(-8) mol cm(-1) s(-1) with the application of strain, indicating higher metal dissolution rates. Applied strain resulted in fractured lacy metal covers, and its effect on pit growth kinetics is discussed.
The following have contributed to this page: Professor Philip J Withers