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- Title
Understanding the Corrosion Mechanism of Spring Steel Induced by MnS Inclusions with Different Sizes.
- Authors
Shi, Weining; Yang, Shufeng; Dong, Anping; Li, Jingshe
- Abstract
This work investigated the effects of differently sized MnS inclusions on the spring steel corrosion mechanism. Accelerated immersion tests, electrochemical measurements and Raman spectroscopy were performed in the vicinity of the MnS inclusions. The number of inclusions associated with existing original micro-crevices was smaller than the quantity of inclusions without crevices. The elemental S concentration decreased monotonically with decreases in the MnS inclusion size regardless of the original micro-crevices. Severe corrosion occurred at MnS inclusions with original micro-crevices, so pitting corrosion was greater. Localized corrosion around the MnS inclusions was found to increase and then decrease with increases in the inclusion size up to 12 µm. The greatest degree of corrosion occurred with 5 µm elongated inclusions. Corrosion products were assessed using Raman spectroscopy. A mechanism for corrosion promoted by differently sized MnS inclusions was proposed.
- Subjects
STEEL corrosion; PITTING corrosion; CORROSION resistance; MANGANOUS sulfide; MICROALLOYING; RAMAN spectroscopy; SCANNING electron microscopy
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2018, Vol 70, Issue 11, p2513
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-018-3026-6