Formation and corrosion behavior of Fe-based amorphous metallic coatings by HVOF thermal spraying

Zhou, Zheng; Wang, Lei; Wang, F.C.; Zhang, H.F.; Liu, Y.B.; Xu, Shuangyan

doi:10.1016/j.surfcoat.2009.08.025

Cited by 174 publications

(68 citation statements)

References 45 publications

(50 reference statements)

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“…Corrosion current density, i o , values for both the laser treated and HVOF sprayed samples are approximately 0.4 and 0.3 mA cm -2 respectively, an order of magnitude of the value for the crystalline material where i o is about 2.5 mA cm -2 . The double steps seen in all polarisation curves in Figure 7 have also been observed by previous authors for a similar Fe-based glass forming alloy [17].…”

Section: Potentiodynamic Testsupporting

confidence: 88%

“…Further optimisation of spraying parameters to increase the extent of melting, and thereby improve coating cohesion, is required. It should be noted that, as previously reported for similar materials, some nanocrystals are likely to be present in the amorphous forms of the material, however these were not directly observed in this work [16,17]. It has been suggested that such nanocrystals contribute to the good corrosion resistance of otherwise amorphous material [26].…”

Section: Microstructuresupporting

confidence: 44%

“…Choi et al [14] generated amorphous material using HVOF with an NiTiZrSiSn feedstock powder. Guo et al [15] [17].…”

Section: Introductionmentioning

confidence: 99%

“…An HVOF sprayed coating can be significantly different to the bulk material of the same composition as the spraying process can introduce porosity, oxides, regions of unmelted and resolidified material and a lamellar microstructure as well as producing the amorphous phase [18,19]. Such features are known to affect the corrosion behaviour [17] [18,20]. The superior corrosion resistance of metallic amorphous alloys is attributed to the lack of defects such as dislocations and grain boundaries which can act as sites of preferential attack in crystalline metals.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion behaviour of crystalline and amorphous forms of the glass forming alloy Fe43Cr16Mo16C15B10

Bakare

Voisey

Chokethawai

et al. 2012

Journal of Alloys and Compounds

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The corrosion behaviour of both crystalline and largely amorphous forms of the Fe-based glass forming alloy, Fe 43 Cr 16 Mo 16 C 15 B 10 alloy was investigated. Two different methods were used to induce transformation to the amorphous form of the alloy: laser melting and HVOF spraying. Both methods produced largely amorphous material, however the high brittleness of the alloy makes it susceptible to cracking during laser treatment, hence this technique is not suitable for largescale application. Potentiodynamic scanning showed that in 0.5M H 2 SO 4 and 3.5% NaCl electrolytes both amorphous forms of the alloy had better corrosion resistance (lower current densities for -200 to +1000mV SCE) compared to the crystalline material. The laser treated material and HVOF coating performed similarly in 3.5% NaCl. In 0.5M H 2 SO 4 the HVOF coating had a lower current density than the laser melted material for almost all of the potential range -300 to +1000mV SCE. The improved corrosion behaviour of the largely amorphous material is attributed to its homogeneity, and particularly to the elimination of the Mo-rich phase that underwent preferential corrosion in the crystalline form of the material.

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Section: Potentiodynamic Testsupporting

confidence: 88%

Section: Microstructuresupporting

confidence: 44%

“…Choi et al [14] generated amorphous material using HVOF with an NiTiZrSiSn feedstock powder. Guo et al [15] [17].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Corrosion behaviour of crystalline and amorphous forms of the glass forming alloy Fe43Cr16Mo16C15B10

Bakare

Voisey

Chokethawai

et al. 2012

Journal of Alloys and Compounds

View full text Add to dashboard Cite

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“…Furthermore, usual application of glassy metals includes pressure sensors for automobile industry and soft magnetic cores 1 . Recently, thermal spraying processes have been applied to produce coatings of metallic glasses in order to enhance the wear and corrosion resistance of metallic components working under severe operational condition, such as in the oil and gas industry [4][5][6][7][8][9][10][11] . In the process, a feedstock material is heated by electrical or chemical means and the spray of molten or semi-molten particles is directed or accelerated to a substrate to form the coating.…”

Section: Amorphous Metallic Alloys Applied By Thermal Spraying Processesmentioning

confidence: 99%

Assessing Collaboration and Knowledge Flow on Coatings of Metallic Glasses Obtained From Thermal Spraying Processes Using Bibliometrics and Science Mapping

et al. 2017

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Coatings of amorphous metallic alloys can be obtained using different thermal spraying processes, such as HVOF, plasma spraying, cold spraying and others. Although many studies focused on investigating scientific issues concerning apply amorphous metallic coatings using thermal spraying, less attention have been paid to evaluate how research institutes and companies are collaborating and influencing each other to promote new technologies. In this paper, we assessed the collaboration of organizations and the knowledge flow on this relatively new field using bibliometrics and science mapping. The method relies on scientific publications indexed in Web of Science and clustered into research areas using the CWTS Publication-level Classification System. These results provide useful insights about how players are organized and may be used in the context of R&D management, science policy and decision making.

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Corrosion of high‐velocity oxy‐fuel (HVOF) sprayed iron‐based amorphous metallic coatings for marine pump in sodium chloride solutions

Wang

et al. 2011

Materials & Corrosion

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FeCrMoMnWBCSi amorphous metallic coatings (AMCs) were deposited onto the 304 stainless steel (base material of pump impeller operated in sand‐containing seawater) by high‐velocity oxygen‐fuel (HVOF) thermal spray. The preparation, microstructural characteristics, and static corrosion behavior of the AMCs were presented. The microstructure and corrosion behavior of the AMCs were characterized by scanning electron microscopy (SEM), X‐ray diffraction (XRD), differential scanning calorimetry (DSC), and electrochemical methods. Melt‐spun ribbon and 304 stainless steel were also used for comparison purposes. The results indicated that the AMCs can spontaneously passivate with a wide passive region, and much higher ability to withstand pitting corrosion than that of the 304 stainless steel for the high pitting resistance equivalent value. The passive current density of the AMCs was at least two orders of magnitude higher than the counterpart ribbon, which showed a slightly decreased uniform corrosion resistance of the AMCs due to the incompact structure and porosity. The corrosion resistance of the AMCs increased with the coating thickness and decreased with the concentration of NaCl solution. A stable passivation ability held in the AMCs endowed them suitably used in marine environments.

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Formation and corrosion behavior of Fe-based amorphous metallic coatings by HVOF thermal spraying

Cited by 174 publications

References 45 publications

Corrosion behaviour of crystalline and amorphous forms of the glass forming alloy Fe43Cr16Mo16C15B10

Corrosion behaviour of crystalline and amorphous forms of the glass forming alloy Fe43Cr16Mo16C15B10

Assessing Collaboration and Knowledge Flow on Coatings of Metallic Glasses Obtained From Thermal Spraying Processes Using Bibliometrics and Science Mapping

Corrosion of high‐velocity oxy‐fuel (HVOF) sprayed iron‐based amorphous metallic coatings for marine pump in sodium chloride solutions

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