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The Effect of Low-Quantity Cr Addition on the Corrosion Behaviour of Dual-Phase High Carbon Steel

Centre for Sustainable Materials Research and Technology (SMaRT Centre), School of Materials Science and Engineering, The University of New South Wales (UNSW Sydney), Sydney, NSW 2052, Australia
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Metals 2018, 8(4), 199; https://doi.org/10.3390/met8040199
Received: 1 March 2018 / Revised: 7 March 2018 / Accepted: 19 March 2018 / Published: 21 March 2018
Industrial application of high carbon low alloy steel with the dual-phase structure of martensite and austenite has increased drastically in recent years. Due to its excellent compression strength and its high abrasion resistance, this grade of steel has used as a high performance cutting tool and in press machinery applications. By increasing the usage of more corrosive media in industrial practice and increasing the demand for reducing the production cost, it is crucial to understand the effect of the small addition of Cr on the corrosion behaviour of this grade of steel. In this study, this effect was investigated using Secondary Electron Microscopy (SEM) and in-situ Atomic Force Microscopy (AFM) in the sodium chloride solution. Also, the corrosion rate was measured using the Tafel polarisation curve. It has been found that the small addition of Cr increased the stability of retained austenite, thus improving its corrosion resistance and reducing its corrosion rate. This effect has been acquired through in-situ high resolution topography images in which the samples were submerged in a corrosive solution. It has been demonstrated that the corrosion rate was reduced when the stability of austenite enhanced. View Full-Text
Keywords: high carbon steel; corrosion rate; atomic force microscopy; effect of Cr high carbon steel; corrosion rate; atomic force microscopy; effect of Cr
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Handoko, W.; Pahlevani, F.; Sahajwalla, V. The Effect of Low-Quantity Cr Addition on the Corrosion Behaviour of Dual-Phase High Carbon Steel. Metals 2018, 8, 199.

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