1. Semiconducting behavior and kinetics of passive film growth on AISI 321 stainless steel in sulfuric acid
- Author
-
Benyaich Abdelaziz, Benzakour Jaouad, Koumya Yassine, Idouhli Rachid, Abouelfida Abdesselam, Khadiri Mohy Eddine, and Aityoub Abdelaaziz
- Subjects
Thesaurus (information retrieval) ,Materials science ,020209 energy ,General Chemical Engineering ,Kinetics ,Metallurgy ,Sulfuric acid ,02 engineering and technology ,General Chemistry ,021001 nanoscience & nanotechnology ,chemistry.chemical_compound ,chemistry ,0202 electrical engineering, electronic engineering, information engineering ,General Materials Science ,0210 nano-technology ,Science, technology and society - Abstract
In the present study, the effects of aging and formation potential on the semiconducting behavior of AISI 321 stainless steel as well as the kinetics of the early stages of pitting are discussed. The donor and acceptor densities decrease with increasing formation potential. The steady-state passive film thickness and the coefficient of oxygen vacancies are estimated. The electrode polarization at higher anodic potentials causes the increase in the rate of pit initiation and slows down the growth rate of passive film. Also, the openness of the pits and their coalescence are highly promoted with the increase in the applied potential.
- Published
- 2019