Back to Search
Start Over
Quantitative analysis of initiation site of pitting corrosion on type 304 austenitic stainless steel.
- Source :
-
Corrosion Science . Aug2023, Vol. 221, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- The initiation site of pitting corrosion on type 304 stainless steel was quantitatively analysed using an automatic inclusion analyser and electron backscatter diffraction. In a sample anodically polarised at 0.43 V SSE , the fraction of stable pits initiated from inclusions was only 23 %. Pits initiated from sites other than inclusions probably initiated from grain boundaries, strain-induced martensite and scratches. In mixed inclusions of MnS and oxides, the probability of pit initiation increased with the S concentration. The Ti concentration had no effect on the probability of pit initiation, suggesting that whether Ti exists as TiO 2 or TiN is important. [Display omitted] • The initiation sites of pitting corrosion on type 304 stainless steel were quantitatively analysed. • Most pits initiated from grain boundaries, strain-induced martensite and scratches. • Among inclusions, MnS was the most likely to initiate pits. • In mixed inclusions of MnS and oxides, the probability of pit initiation increased at higher S concentrations. • The elements released from Ti-based inclusions may affect the tendency of pit initiation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0010938X
- Volume :
- 221
- Database :
- Academic Search Index
- Journal :
- Corrosion Science
- Publication Type :
- Academic Journal
- Accession number :
- 164865498
- Full Text :
- https://doi.org/10.1016/j.corsci.2023.111312