Study of corrosion and tribocorrosion of Fe3Al-based duplex PVD/HVOF coatings against alumina in NaCl solution

Pougoum, Fabrice; Qian, Jincheng; Martinů, L.; Klemberg-Sapieha, Jolanta E.; Zhou, Zhifeng; Li, K.Y.; Savoie, S.; Lacasse, R.; Potvin, E.; Schulz, Robert

doi:10.1016/j.surfcoat.2018.10.060

Cited by 23 publications

(11 citation statements)

References 25 publications

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“…This is achieved due to the fact that the melting and dispersion of the wire material is carried out in inert argon plasma, which leads to minimal oxidation of particles during the spraying process. Unlike [5][6][7] where the coating process is associated with significant costs for the purchase of materials, the PAS process is characterized by a lower cost of the process. It is shown that the use of more economical materials (wires instead of specialized powders) and heating sources (electric arc instead of gas mixtures) makes it possible to form high-quality intermetallide coatings.…”

Section: Discussion Of Results Of Investigating the Properties And St...mentioning

confidence: 99%

“…However, for the case of PS, there is a significant porosity of the resulting coating. In [6], it was shown that HVOF coatings based on the Fe 3 Al intermetallide have better corrosion resistance in sulphuration and cementation atmospheres at 600 °C for 500 hours compared to steel 304 and alloy 800H. In addition, such coatings show adequate resistance to thermal shock and better resistance to erosion by quartz particles at 600 and 900 °C than the steel 316L.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Effect of the technological parameters of plasma-arc spraying of flux-cored wire on the structure and properties of intermetallide coatings based on Fe3Al

Korzhyk

Burlachenko

Strohonov

et al. 2023

EEJET

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Existing techniques for applying intermetallide layers are characterized by low productivity, difficulties associated with the maintenance and operation of technological equipment, as well as significant costs for the purchase of materials for spraying. Therefore, modern science shows considerable interest in the development of new, highly effective technologies to form intermetallide coatings on the surface of articles. Such promising techniques include the technology of plasma-arc spraying (PAS) of flux-cored wires. This technique has a number of significant advantages, namely high performance, relative simplicity, as well as the affordability of equipment and materials for coating. This paper reports a study into the structure and properties of coatings obtained by flux-cored wire PAS, in which the steel sheath and aluminum powder filler interact when heated with the exothermic effect of Fe3Al synthesis. The influence of technological parameters of PAS process on the structure and properties of Fe-Al coatings was investigated by means of mathematical planning of the experiment. It was found that in all samples the main phase is an intermetallide of the Fe3Al type. Tests for gas-abrasive wear resistance at room temperature showed that the wear resistance of coatings exceeds the stability of steel S235 by an average of 2 times. As a result of studying the electrochemical properties in a 3-% aqueous solution of NaCl and in a 0.5-% solution of H2SO4, the score of corrosion resistance for these media was determined, which was, respectively, 4 and 5 (coatings belong to the group of "resistant"). In this regard, the practical use of coatings based on the Fe3Al intermetallide is recommended for protection against oxidation, corrosion, and gas-abrasive wear of components and assemblies in the heat power industry (heat exchanger pipes, catalytic converters, steam turbine blades, shut-off valves, etc.)

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Section: Discussion Of Results Of Investigating the Properties And St...mentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Effect of the technological parameters of plasma-arc spraying of flux-cored wire on the structure and properties of intermetallide coatings based on Fe3Al

Korzhyk

Burlachenko

Strohonov

et al. 2023

EEJET

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“…Therefore, EDC process is a unique method for surface modification especially for industrial purposes, such as mold and die repairing and performance enhancing in terms of hardness, corrosion and wear resistance. Table 4 shows a summary of coating features between EDC, thermal spraying, vapour deposition and electroplating [3,21,26,[86][87][88][89][90][91][92][93][94][95][96][97][98][99][100][101][102][103][104].…”

Section: Coating Mechanisms and Featuresmentioning

confidence: 99%

Surface modification and functionalization by electrical discharge coating: a comprehensive review

Liew

Yap

Wang

et al. 2020

Int. J. Extrem. Manuf.

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Hard coatings are extensively required in industry for protecting mechanical/structural parts that withstand extremely high temperature, stress, chemical corrosion, and other hostile environments. Electrical discharge coating (EDC) is an emerging surface modification technology to produce such hard coatings by using electrical discharges to coat a layer of material on workpiece surface to modify and enhance the surface characteristics or create new surface functions. This paper presents a comprehensive overview of EDC technologies for various materials, and summarises the types and key parameters of EDC processes as well as the characteristics of resulting coatings. It provides a systematic summary of the fundamentals and key features of the EDC processes, as well as its applications and future trends.

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“…However, most of these studies are limited to high-temperature applications, where the application of a PVD coating to a thermal-sprayed coating is referred to as a duplex treatment. Some work has also been conducted to seal thermal spray defects in order to increase the corrosion resistance of coatings [19]. In this case, the authors observed an increase in the corrosion resistance of the sealed system due to the barrier effect of the PVD coating against corrosive media.…”

Section: Introductionmentioning

confidence: 99%

The Use of Thin Films as Defect Sealants to Increase the Corrosion Resistance of Thermal Spray Coatings

Lanzutti,

Sordetti,

Marin

et al. 2023

Metals

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Thermal spray-coated components are widely used as wear-resistant coatings in many applications. However, these coatings have high levels of discontinuities that affect the corrosion resistance of the coated system. To reduce this problem, these coatings are usually sealed with liquid sealants (metals, organic or inorganic). The aim of this work is to seal the surface discontinuities of thermal-sprayed coatings using PVD and/or ALD coatings. To this end, CrN (arc deposition PVD) and TiO2 (ALD) coatings were deposited on thermal-sprayed alumina coatings. The samples produced were then analysed in both cross-sectional and planar views to detect the possible permeation of the thin film coatings into the thermal spray defects. Rf-GDOES measurements were performed to detect the very thin ALD deposit on the surface. The corrosion resistance of the sealed coatings was verified with immersion tests, wherein the OCP was monitored for 24 h, and potentiodynamic tests were performed after 15 min and 24 h immersions. The results showed that the thin films were not able to block the permeation of corrosive media, but they could reduce the permeation of corrosive media with a beneficial behaviour on corrosion resistance.

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Study of corrosion and tribocorrosion of Fe3Al-based duplex PVD/HVOF coatings against alumina in NaCl solution

Cited by 23 publications

References 25 publications

Effect of the technological parameters of plasma-arc spraying of flux-cored wire on the structure and properties of intermetallide coatings based on Fe3Al

Effect of the technological parameters of plasma-arc spraying of flux-cored wire on the structure and properties of intermetallide coatings based on Fe3Al

Surface modification and functionalization by electrical discharge coating: a comprehensive review

The Use of Thin Films as Defect Sealants to Increase the Corrosion Resistance of Thermal Spray Coatings

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