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Erosion–corrosion and corrosion properties of DLC coated low temperature gas-nitrided austenitic stainless steel

✍ Scribed by Morten S. Jellesen; Thomas L. Christiansen; Lisbeth Rischel Hilbert; Per Møller

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
989 KB
Volume
267
Category
Article
ISSN
0043-1648

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✦ Synopsis

Low temperature nitriding of stainless steel leads to the formation of a surface zone of so-called expanded austenite, i.e. by dissolution of large amounts of nitrogen in solid solution. In the present work the possibility of using nitrogen expanded austenite "layers" obtained by gaseous nitriding of AISI 316 as substrate for DLC coatings are investigated. Corrosion and erosion-corrosion measurements were carried out on low temperature nitrided stainless steel AISI 316 and on low temperature nitrided stainless steel AISI 316 with a top layer of DLC. The combination of DLC and low temperature nitriding dramatically reduces the amount of erosion-corrosion of stainless steel under impingement of particles in a corrosive medium.

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