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Effect of Microalloying on the Structure and Phase Composition of Near-β-Titanium Alloy Read chapter Read first chapter

2018 | OriginalPaper | Chapter

10. The Relationship of Pitting Potential to Chemical Composition of Steels Alloyed with Nitrogen

Authors : E. Merkushkin, V. Berezovskaya, M. Spiedel

Published in: Advanced Methods and Technologies in Metallurgy in Russia

Publisher: Springer International Publishing

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Abstract

The problem of a rational application of alloying elements, in particular, nickel saving, is now successfully resolved when designing carbonless austenitic Cr-Mn steels with a high nitrogen content. In order to predict the corrosion properties of steels and have optimized their chemical composition, a large group of austenitic stainless steels alloyed with nitrogen have been studied for pitting corrosion. Investigated steels were tested after hot rolling and annealing at 1050 °C followed by quenching. Pitting corrosion resistance tests were carried out on a Voltalab 10 PGZ100 device with the VoltaMaster 4 software in a 3.5% sodium chloride solution using a chlorine-silver reference electrode. It was shown that nickel-free Cr-Mn steel with a high nitrogen content (0.8 wt. %) has a significantly higher resistance to pitting corrosion (Epit = 1.4 V) than the other steels. There were also obtained dependences of resistance to pitting, PREN (pitting resistance equivalent number) and MARС (measure of alloying for resistance for corrosion) of the nitrogen content in the steel. On the basis of the results of electrochemical studies and calculation of PREN and MARС, the correlation equations relating the pitting potential with the chemical composition of nitrogen-containing steels have been proposed.

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Metadata
Title
The Relationship of Pitting Potential to Chemical Composition of Steels Alloyed with Nitrogen
Authors
E. Merkushkin
V. Berezovskaya
M. Spiedel
Copyright Year
2018
Book
Advanced Methods and Technologies in Metallurgy in Russia

Print ISBN: 978-3-319-66353-1

Electronic ISBN: 978-3-319-66354-8

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-3-319-66354-8_10

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