Study on the Microstructure of FeCrAl/Aluminum Bronze Composite Coatings Prepared by Supersonic Electric Arc-Spraying

Wang, Zhao Jun; Zhu, Guangming; Yin, Feng

doi:10.4028/www.scientific.net/amm.217-219.1346

Cited by 1 publication

(4 citation statements)

References 3 publications

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“…The adhesion strength of particles, as shown in Table 3, improved relatively with increase in the operating voltage and current [12]. The adhesion strength shows the combinative characteristics of the coating and substrate.…”

Section: Microhardnessmentioning

confidence: 92%

“…The data in the Table 4 shows that current density of the composite coatings first increased and then decreased with increase in the voltage and current. The adhesion strength of particles, as shown in Table 3, improved relatively with increase in the operating voltage and current [12]. The adhesion strength shows the combinative characteristics of the coating and substrate.…”

Section: Corrosion Behaviormentioning

confidence: 92%

“…This affects bonding enhancement of coating to the substrate material. Increase in the voltage from 32 to 44 V raised the arc temperature which resulted in splats forming circular disks, and increase in the arc voltage decreased diameter of the droplets formed at the wire tip [12]. Coatings #A and #B were of lower voltage, and thus the droplets splashed on the surface forming irregular splats.…”

Section: Microstructure Of the Coatingmentioning

confidence: 99%

“…In this case, however, the higher melting point materials can be used as the anode, while the lower melting point materials used as the cathode in order to obtain a better droplet dispersion produced from the corresponding wires [10]. Some of the composite coatings formed by arc spraying include but not limited to nickel-aluminium intermetallic compound coatings, zinc-aluminium alloy, 321 stainless steel-aluminum wires, and FeCrAl-aluminum-bronze [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Microstructural and Corrosion Behavior of High Velocity Arc Sprayed FeCrAl/Al Composite Coating on Q235 Steel Substrate

et al. 2019

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High velocity arc spraying was used to prepare FeCrAl/Al composite coating on Q235 steel substrate by simultaneously spraying FeCrAl wire as the anode and Al wire as the cathode. The composite coating was sprayed with varying voltage and current to obtain optimum coating characteristics. FeCrAl coating was also prepared for comparison purposes. The surface microstructure of the coatings was characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The average microhardness of the coatings and the substrate was analyzed and compared. Corrosion resistance was investigated by means of electrochemical tests. The image results showed that a lamellar structure consisted of interwoven layers of FeCrAl and Al. Al and FeCr constituted the main phases with traces of oxides and AlFe intermetallic compounds. The average porosity was reduced and microhardness of the coatings was improved with increasing voltage and current. The FeCrAl/Al coating formed alternating layers of hard and ductile phases; the corrosion resistance of the coatings in the sodium chloride (NaCl) solution depended on the increase in Al content and spray parameters. The corrosion resistance tests indicated that FeCrAl/Al coating had a better corrosion resistance than the FeCrAl coating. FeCrAl/Al can be used to coat steel substrates and increase their corrosion resistance.

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Section: Microhardnessmentioning

confidence: 92%

Section: Corrosion Behaviormentioning

confidence: 92%

Section: Microstructure Of the Coatingmentioning

confidence: 99%