An electrochemical and microstructural assessment of erosion-corrosion of austenitic cast iron for marine applications

H. Xu, A. Neville

Research output: Contribution to journalArticle

Abstract

In this paper the corrosion and erosion-corrosion characteristics of an austenitic cast iron (BS 3468 S2W) are examined under an impinging flow free from solid particles. Under static and erosioncorrosion conditions the corrosion process is controlled by activation effects and conforms to Tafel kinetics. The corrosion rate is increased under impingement conditions compared with under static conditions but the trend is complex. Although corrosion plays a part in the degradation of BS 3468 S2Wunder an impinging jet, it is clear that there is a significant role played by mechanical processes and the effect that corrosion has on the mechanical erosion processes. The pure electrochemical corrosion component of thematerial loss is reduced as a percentage of the overall weight loss on increasing the impinging jet velocity. Corrosion has been seen to initiate at the boundary between the nodules of graphite and the surrounding Fe-rich matrix and hence a physical interpretation of the effect of corrosion on erosion is identified. © WILEY-VCH Verlag GmbH, D-69451 Weinheim, 2002.

Original languageEnglish
Pages (from-to)5-12
Number of pages8
JournalMaterials and Corrosion
Volume53
Issue number1
DOIs
Publication statusPublished - Jan 2002

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Marine applications
Cast iron
Erosion
Corrosion
Electrochemical corrosion
Corrosion rate
Graphite
Chemical activation
Degradation
Kinetics

Cite this

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abstract = "In this paper the corrosion and erosion-corrosion characteristics of an austenitic cast iron (BS 3468 S2W) are examined under an impinging flow free from solid particles. Under static and erosioncorrosion conditions the corrosion process is controlled by activation effects and conforms to Tafel kinetics. The corrosion rate is increased under impingement conditions compared with under static conditions but the trend is complex. Although corrosion plays a part in the degradation of BS 3468 S2Wunder an impinging jet, it is clear that there is a significant role played by mechanical processes and the effect that corrosion has on the mechanical erosion processes. The pure electrochemical corrosion component of thematerial loss is reduced as a percentage of the overall weight loss on increasing the impinging jet velocity. Corrosion has been seen to initiate at the boundary between the nodules of graphite and the surrounding Fe-rich matrix and hence a physical interpretation of the effect of corrosion on erosion is identified. {\circledC} WILEY-VCH Verlag GmbH, D-69451 Weinheim, 2002.",
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An electrochemical and microstructural assessment of erosion-corrosion of austenitic cast iron for marine applications. / Xu, H.; Neville, A.

In: Materials and Corrosion, Vol. 53, No. 1, 01.2002, p. 5-12.

Research output: Contribution to journalArticle

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