Abstract
Laser clad coatings consisting of a Ni-based matrix and tungsten carbide (WC) hard phases are used for heavy wear protection of components in many industries. Matrix composition and WC type can be chosen to give these composites resistance to erosive/abrasive wear, as well as to the impacts of particles and corrosion. Maintaining ductility in the matrix is important, so that it can absorb impact energy and minimize cracking, thus avoiding penetration of corrosive media through cracks and subsequent corrosion in the substrate-cladding interface. Claddings were tested for their impact resistance by means of a single impact with a hard, spherical indenter. The depth of impact craters was measured, and the cracking behavior was analyzed. Corrosion resistance of Ni/WC composites, a HVOF WC/CoCr coating and a hard chrome reference coating were tested by electrochemical corrosion in a 3.5 wt.% NaCl solution and by exposure for up to 1000 h in a salt spray test.
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Acknowledgements
The CRC Program (Grant No. 53996) supports industry-led collaborations between industry, researchers and the community. We acknowledge the support of Taiho Kogyo Tribology Research Foundation (TTRF) in financing this study.
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Schulz, C., Schläfer, T., Plowman, J. et al. Considering Impact and Corrosion Resistance in the Performance of Heavy Wear Resistant Coatings. JOM 72, 4624–4631 (2020). https://doi.org/10.1007/s11837-020-04390-3
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DOI: https://doi.org/10.1007/s11837-020-04390-3