Influence of nitriding on corrosion resistance of martensitic X17CrNi16-2 stainless steel

Nitriding increases surface hardness and improves wear resistance of stainless steels. However, nitriding can sometimes reduce their corrosion resistance. In this paper, the influence of nitriding on the corrosion resistance of martensitic stainless steel was investigated. Plasma nitriding at 440 °C...

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Bibliographic Details
Published in:Materialwissenschaft und Werkstofftechnik 2015-01, Vol.46 (1), p.69-77
Main Authors: Cajner, F., Kovačić, S., Rafael, H., Vugrinčić, A., Šimunović, V., Gržeta, B.
Format: Article
Language:English
Subjects:
Aqueous solutions
Carbonitriding
Corrosion resistance
Corrosion resistant steels
Corrosion tests
Corrosive wear
Depth profiling
Electrochemical corrosion
Glow discharges
Immersion tests (corrosion)
Ion nitriding
Korrosionsbeständigkeit
Low temperature
Low temperature resistance
Martensitic stainless steel
Martensitic stainless steels
Martensitischer Stahl
Microhardness
Nitriding
Nitrocarburizing
Optical emission spectroscopy
Phase composition
plasma nitriding
Plasmanitrieren
Röntgenbeugung
salt bath nitrocarburizing
Salt baths
Salt spray tests
Salzbadnitrocarburieren
Sodium chloride
Stainless steel
Stainless steels
Surface hardness
Wear resistance
X-ray diffraction
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Summary:Nitriding increases surface hardness and improves wear resistance of stainless steels. However, nitriding can sometimes reduce their corrosion resistance. In this paper, the influence of nitriding on the corrosion resistance of martensitic stainless steel was investigated. Plasma nitriding at 440 °C and 525 °C and salt bath nitrocarburizing were carried out on X17CrNi16‐2 stainless steel. Microhardness profiles of the obtained nitrided layers were examined. Phase composition analysis and quantitative depth profile analysis of the nitrided layers were preformed by X‐ray diffraction (XRD) and glow‐discharge optical emission spectrometry (GD‐OES), respectively. Corrosion behaviour was evaluated by immersion test in 1% HCl, salt spray test in 5% NaCl and electrochemical corrosion tests in 3.5% NaCl aqueous solution. Results show that salt bath nitrocarburizing, as well as plasma nitriding at low temperature, increased microhardness without significantly reducing corrosion resistance. Plasma nitriding at a higher temperature increased the corrosion tendency of the X17CrNi16‐2 steel.
ISSN:0933-5137
1521-4052
DOI:10.1002/mawe.201400386