Influence of thermal oxides on pitting corrosion of stainless steel in chloride solutions
Authors: Esih, I.; Alar, V.; Juraga, I.
Source: Corrosion Engineering, Science and Technology, Volume 40, Number 2, June 2005 , pp. 110-120(11)
Publisher: Maney Publishing
Abstract:X-ray diffraction analysis, Auger electron spectroscopy, X-ray photoelectron spectrometry, optical micrography, and spot potential measurements have been used to characterise AISI 316L stainless steel specimens with oxide films formed by heating in air, either isothermally (at 200–1000°C) or in a temperature gradient. The pitting corrosion propensities of such specimens were assessed by exposure to FeCl3 solution and the evaluation of nine topographical criteria. Testing was also performed on previously heated specimens after removal of the thermal oxides by pickling. It is demonstrated that thermal oxides facilitate the nucleation of corrosion pits but do not influence their propagation. The effect on nucleation is caused by stresses and lattice defects in oxide film and metal substrate. The maximum susceptibility to pitting liability occurs after heating at 600°C. The removal of thermal oxides formed at 200–800°C by pickling improves the pitting resistance but the initial stability is never restored because of residual stresses and lattice defects on the cleaned metal surface. Indeed, after heating at 1000°C, pitting tendencies are increased by pickling.
Document Type: Research Article
Publication date: 2005-06-01
Authors wishing to cite fast track papers should give the journal name and the article DOI. This will enable reference linking via CrossRef and allow forward and backward citation tracking systems to associate the fast track citation with the final journal reference.
This journal features top 10 articles which are freely available. Please click here and click on the 'Top articles' link in the right-hand menu to view the list and start downloading.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- Online submission site
- Top 10 Articles
- ingentaconnect is not responsible for the content or availability of external websites