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Wear and high-temperature corrosion behaviorof a wire-arc sprayed NiCrB coating


Peer-reviewed Papers

Authors: Dr. Zheng Zhou, Prof. Dr. Ding-Yong He, Xiao-Zhou Zhao, Dr. Qiu-Ying Zhao, Ran Li, Prof. Dr.-Ing. Kirsten Bobzin, Dr.-Ing Nils Kopp, Dr.-Ing. Lidong Zhao

A new NiCrB cored wire was used to produce protective coatings for components used in high-temperature environment by wire-arc spraying process. The microstructure, wear resistance and high-temperature corrosion behavior of the NiCrB coating were investigated in comparison with a traditional NiCrTi coating. The NiCrB coating presented a homogeneous structure with significantly fewer oxide inclusions, but a slightly higher porosity than the NiCrTi coating. The NiCrB was harder than the NiCrTi coating, thus leading to its superior wear resistance. Thermogravimetric technique was used to evaluate the high-temperature corrosion behavior of the coatings in molten salt environment (Na2SO4 with a mass fraction of 10% NaCl) at 800 °C under cyclic oxidation condition. The results showed that the NiCrB coating exhibited excellent corrosion resistance as the NiCrTi coating.
Pages: 48 - 54
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Ausgabe 1 (2013) Jahrgang 6 Page 54

This article appeared in issue 1 (2013).

Issue 1 (2013) Volume 6
Thermal Spray Bulletin
Issue 1 (2013) Volume 6
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