Corrosion behaviour of plasma sprayed Fe based metallic glass (Fe73Cr2Si11B11C3 (at%) coatings in 3.5% NaCl solution

Bijalwan, Pavan; Singh, Charu; Kumar, Adesh; Sarkar, Kanchan; Rani, Nitu; Laha, Tapas; Banerjee, Archi; Mondal, K.

doi:10.1016/j.jnoncrysol.2021.120913

Cited by 29 publications

(9 citation statements)

References 65 publications

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“…Therefore, the high energy input facilitates mechanical interlocking and crushing of surface oxide, which increases the interlocking area and enables the inner amorphous components inside the particles to fully contact and form metallurgical bonding [31] (shown as Figure 11). However, too high thermal input will also lead to high surface temperature of the spray particles, which will stimulate oxidation and crystallization [32] as evidenced by the oxygen enrichment around the intersplats in Figure 10. To avoid excessive oxidation and crystallization, theoretically, the heat required for spraying is sufficient to melt the particles before cooling and forming.…”

Section: Discussionmentioning

confidence: 99%

Effect of Oxidation and Crystallization on Pitting Initiation Behavior of Fe-Based Amorphous Coatings

Zhang

Wang

et al. 2022

Coatings

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Fe-based amorphous coatings are typically fabricated by high-velocity oxygen-fuel spraying using industrial raw materials. The bonding mode between the coating particles and the corrosion mechanism of the coating in the chloride-rich environment were studied. The results indicate that some fine crystallites such as α-Fe and Fe3C tend to precipitate from the amorphous matrix as the kerosene flow rate increases or the travel speed of spraying gun decreases. Moreover, some precipitates of the (Cr, Fe)2O3 nanocrystal were detected in the metallurgical interfaces of the amorphous coating. The relationship among the amorphous volume fraction, porosity, and spraying parameters, such as the kerosene flow rate and the travel speed of the spray gun, were established. Due to an oxidation effect during spraying process, atomic diffusion, crystallite precipitation and regional depletion of Cr occur in the area along the pre-deposited side near the metallurgical bonding interface, leading to the initiation of pitting. A model of pitting initiation and expansion of Fe-based amorphous coatings is proposed in this paper.

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Section: Discussionmentioning

confidence: 99%

Effect of Oxidation and Crystallization on Pitting Initiation Behavior of Fe-Based Amorphous Coatings

Zhang

Wang

et al. 2022

Coatings

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“…There have been some studies, where long-term corrosion resistance of thermal sprayed Fe-based MGCs has been examined through the afore-mentioned tests [68,73,75,76,136,141,180,233,[297][298][299][300][301][302]. Long-term corrosion study carried out by Farmer et al [68] via long-term salt-fog and immersion tests revealed that the HVOF-sprayed SAM2X5 on 316L SS as well as Ni-based alloy substrates possessed improved resistance to corrosive attack in the tested environments (Figure 30).…”

Section: Solution (Immersion Mode) and Interrupted Eis Behaviour Can ...mentioning

confidence: 99%

“…Recently, the present authors' group has carried out systematic investigations on the thermal sprayed insitu Fe-based MG composite coatings in a quest to develop new economical low Cr-, no Mo-and no rare earth elements-containing coatings with enhanced corrosion resistance meanwhile maintaining better mechanical properties, especially wear resistance [170,175,176,300,[388][389][390][391][392][393][394][395][396][397]. Kumar et al [176] investigated the influence of compositional as well as microstructural heterogeneities on corrosion properties for plasma-sprayed Fe-based MG composite coating and proposed a new method of modulus mapping to estimate amount of crystalline precipitates in synthesized coatings, as shown in Figure 63.…”

Section: In-situ Composite Coatingsmentioning

confidence: 99%

Fe-based metallic glass coatings by thermal spraying: a focused review on corrosion properties and related degradation mechanisms

Nayak

Kumar

Laha

2022

International Materials Reviews

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Among various materials available for alleviating the corrosion-related degradation, thermal sprayed Fe-based metallic glass coatings (MGCs) have received huge attention from the scientific community due to the exceptional combination of mechanical and corrosion properties, along with commercially attractive low material cost of this particular alloy system. Emerging reports on the thermal sprayed Fe-based MGCs outperforming conventional corrosion-resistant materials and coatings have accelerated further exploration of this domain, resulting in an immense increase of research activities over the last few decades producing fascinating results. This review takes a holistic approach encompassing an in-depth assessment of all the relevant salient work till date, including corrosion properties, corresponding degradation mechanisms, metallurgical and environmental factors with reference to passive film dynamics and/or formation of corrosion products. Moreover, various strategies for improved corrosion properties and recent research progress have been reviewed with an attempt to identify the present knowledge gaps and the future research directions.

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“…The coatings were found to have low porosity, excellent corrosion resistance, and high amorphous content, deposited at 30 kW. Pavan et al [24] deposited different thicknesses Fe-based AMC on mild steel substrates using the atmospheric plasma spraying. They got the best corrosion resistance when the coating thickness was 110 ± 12 μm.…”

Section: Introductionmentioning

confidence: 99%

Interfacial bonding of low-pressure plasma-sprayed Fe-based amorphous coating on 8090 Al–Li alloy

Hao

Wang

Chen

et al. 2023

Surface Engineering

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Fe-based amorphous coatings (AMC) are deposited on 8090 Al-Li alloy using low-pressure plasma spraying. Coating's microstructure and interfacial characteristics are investigated. The coating is mainly amorphous in structure. Some crystalline phases were observed between the two splats. The corrosion current density of this coating is two orders of magnitude less compared to 8090. The coating has high density as the average porosity is less than 0.5%. Because of partial melting and quick cooling of the 8090 alloy in the process of molten droplets deposition, there is an amorphous transition zone formed at the interface of AMC/ 8090 Al-Li alloy, which indicates localized metallurgical bonding. In electrochemical testing, the coating shows an obvious passivation tendency, and crystallization between splats is the main cause of corrosion. Owing to the low oxygen content, the coating exhibits excellent wear resistance.

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Corrosion behaviour of plasma sprayed Fe based metallic glass (Fe73Cr2Si11B11C3 (at%) coatings in 3.5% NaCl solution

Cited by 29 publications

References 65 publications

Effect of Oxidation and Crystallization on Pitting Initiation Behavior of Fe-Based Amorphous Coatings

Effect of Oxidation and Crystallization on Pitting Initiation Behavior of Fe-Based Amorphous Coatings

Fe-based metallic glass coatings by thermal spraying: a focused review on corrosion properties and related degradation mechanisms

Interfacial bonding of low-pressure plasma-sprayed Fe-based amorphous coating on 8090 Al–Li alloy

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