dc.contributorUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-05-01T14:35:29Z
dc.date.accessioned2022-12-20T03:49:50Z
dc.date.available2022-05-01T14:35:29Z
dc.date.available2022-12-20T03:49:50Z
dc.date.created2022-05-01T14:35:29Z
dc.date.issued2022-03-01
dc.identifierJournal of the Brazilian Society of Mechanical Sciences and Engineering, v. 44, n. 3, 2022.
dc.identifier1806-3691
dc.identifier1678-5878
dc.identifierhttp://hdl.handle.net/11449/234208
dc.identifier10.1007/s40430-021-03320-x
dc.identifier2-s2.0-85125450381
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5414309
dc.description.abstractWhile electroplated hard chromium (EHC) coatings enhance corrosion resistance and wear strength, it does decrease the fatigue performance of mechanical components due to the existence of tensile stresses and cracking in the coatings. The high-velocity oxy-fuel (HVOF) thermal spray process is a potential alternative coating process with lower impact on the fatigue strength. The present study aimed to investigate the wear and corrosion properties of AISI 4340 steel coated with HVOF-sprayed WC- and NiCr-based coatings of WC-CrC-Ni, Ni–Cr-B-Si-Fe and Ni-20Cr as a substitution for EHC coating. Salt spray and pin-on-disk tests were carried out to evaluate the corrosion and wear resistance of the coatings. From the WC- and NiCr-based coatings evaluated, Ni-20Cr and WC-CrC-C-Ni achieved superior corrosion resistance compared to EHC, but with Ni–Cr-B-Si-Fe having inferior performance to all the compositions and the EHC. The HVOF coating that resulted in the highest wear resistance was Ni-20 Cr, followed by Ni–Cr-B-Si-Fe and WC-CrC-Ni coatings. Both Ni-20 Cr and Ni–Cr-B-Si-Fe had better wear performance than EHC. The wear mechanisms were investigated through energy-dispersive spectroscopy (EDS) and scanning electron microscopy (SEM) techniques. The primary wear mechanism of Ni–Cr-B-Si-Fe, WC-CrC-Ni and Ni-20Cr HVOF thermal-sprayed coatings was found to be adhesive. Regarding the combination of both corrosion and wear performances, the Ni-20Cr HVOF coating was the only one that improved both properties compared to EHC since it reduced the pin/disk volume loss by about 60% and withstood 1000 h in a salt spray environment.
dc.languageeng
dc.relationJournal of the Brazilian Society of Mechanical Sciences and Engineering
dc.sourceScopus
dc.subjectCorrosion
dc.subjectElectroplated hard chromium
dc.subjectHVOF
dc.subjectWear
dc.titleInvestigation of HVOF-sprayed WC- and NiCr-based coatings to improve corrosion and wear performance of high-strength steel
dc.typeArtículos de revistas


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