The accumulation of trihalide ions caused by corrosion has been kinetically and stochastically studied using types 304L (UNS S30403) and 316L (UNS S31603) stainless steels in an iodine solution, which is a halogen-type solution. Hourly changes of trihalide ion concentration and mass loss can be stated as eG×t where G is a kinetic parameter and t is time, respectively. The probability of pit initiation follows the exponential law (F = 1 − e−λ×t) where λ is a pit generation rate (stochastic parameter). It was deduced that this parameter is proportional to the kinetic parameter above. Experiments proved it to be valid regardless of temperature, triiodide ion concentration at time 0, and material.

This content is only available as a PDF.
NACE International
1993
You do not currently have access to this content.