Corrosion behavior of boronized nickel-based alloys in the molten chloride Salt

Dsouza, Brendan; Leong, Amanda; Yang, Qiufeng; Zhang, Jinsuo

doi:10.1016/j.corsci.2021.109285

Cited by 25 publications

(9 citation statements)

References 19 publications

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“…[31] The boronized alloys also exhibited better corrosion resistance. [32] As a result of the corrosion experiments, it is found that boronizing treatments significantly increased the corrosion resistance of the material in 1 mol/dm 3 HCl solution. [33] The type of corrosion of boronized AISI 1010 steel in H 2 SO 4 solution was pitting corrosion.…”

Section: Corrosion Ratementioning

confidence: 93%

Increasing corrosion resistance of AISI 1010 steel by boride coatings

Bayça

Bican

2022

Materials & Corrosion

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Boriding is the process of coating the metal surface with a ceramic metal boride layer by the diffusion method. Iron borides, one of the metal borides, are called ceramics because they are covalently bonded compounds. Iron boride coatings contain strong Fe-B and B-B covalent bonds. In this study, the effect of boronizing on the corrosion resistance of AISI 1010 steel was investigated. Baybora-1 which has recently been patented was used as boronizing agent. AISI 1010 steel was borided at 950°C for 2, 4, and 6 h using the solid method. The microstructure, hardness, and corrosion rate of the samples were investigated. The change in the corrosion rate of the samples was determined by the corrosion test specified in the ASTM G31-72 standard.The results showed that the hardness of the iron boride layer formed on the surface as a result of the boronizing process was greater than that of the matrix. As a result of the boriding process, the hardness of the iron boride layer on the steel surface reached approximately eight times the hardness of the substrate matrix. The thickness of the iron boride layer on the steel sample surface was measured at 950°C for 2 and 6 h, respectively, as 45 ± 12 and 155 ± 13 µm. It was concluded that the boriding process increased the corrosion resistance of steel.

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Section: Corrosion Ratementioning

confidence: 93%

Increasing corrosion resistance of AISI 1010 steel by boride coatings

Bayça

Bican

2022

Materials & Corrosion

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“…The boronized layer contains CrB, FeB, MnB, Fe2B, Fe3B, MnB2, BNi3, Cr5B3, Cr2B3, Ni4B3 and other compounds. According to previous studies, the formation mechanism of the boronized layer is as follows [29]: firstly, at the boronizing temperature, boron atoms are transferred to the surface of the materials through gas diffusion and then solid-state diffusion to the sub-surface area; secondly, as the temperature rises, the boron atoms form metal borides with the most active elements; thirdly, the boride layer consists of an outermost boride layer and an intermediate diffusion layer.…”

Section: Microstructuresmentioning

confidence: 99%

Tribological Behavior of Boronized Fe40Mn20Cr20Ni20 High-Entropy Alloys

Guo

Jin

Shi

et al. 2021

Metals

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The tribological behavior of hot-rolled and boronized Fe40Mn20Cr20Ni20 high-entropy alloys (HEAs) sliding against a Si3N4 ball was investigated in the air, deionized water and seawater. The results showed that the hot-rolled Fe40Mn20Cr20Ni20 HEA was composed of an FCC (face-centered cubic) phase. In addition, the boronized HEA was composed of a great number of borides, including CrB, FeB, MnB, Fe2B, Fe3B and MnB2. The hardness increased from 139 HV to 970 HV after boronizing. In air, the wear rate decreased from 4.51 × 10−4 mm3/Nm to 0.72 × 10−4 mm3/Nm after boronizing. The wear mechanism transformed from abrasive wear and oxidative wear to the polishing effect. After boronizing, in the deionized water, the wear rate decreased from 1.27 × 10−4 mm3/Nm to 8.43 × 10−5 mm3/Nm. The wear mechanism transformed from abrasive wear and delamination wear to delamination wear. In the seawater, the wear rate decreased by about ten times that of hot-rolled alloy.

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“…8 Structural alloy corrosion has been recognized as one of the main concerns in the deployment of molten salt technologies, and as a result, corrosion studies of structural alloys in molten salts have been performed extensively in recent years. 7,9,10 Although molten salt-based technologies are recognized and expected to play a crucial, transformative role in energy and industrial applications in the future, the developments and selections of corrosion-resistant structural materials, as well as producing pure and noncorrosive salts, have lagged behind, which has prevented the fast development and deployment of these technologies. Consequently, there is a need to develop high-throughput techniques to accelerate material testing for molten salt technologies.…”

Section: Introductionmentioning

confidence: 99%

In Situ Corrosion Monitoring of the T91 Alloy in a Molten Chloride Salt Using a Miniaturized Electrochemical Probe for High-Throughput Applications

et al. 2022

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Corrosion sensing is essential to monitor and safeguard materials’ health in molten salts. The present study developed a three-electrode-array minisensor for high-temperature molten salt corrosion monitoring. By using the developed sensor, the impurity-driven corrosion of T91 by a fission product, europium, in the LiCl–KCl eutectic molten salt has been studied. The developed minisensor was validated to be an ideal probe for in situ corrosion monitoring in the high-temperature molten salt via the comparisons on concentrations of the dissolved corrosion products detected using this device and inductively coupled plasma mass spectroscopy. To analyze the large volume of data measured using the minisensor during in situ corrosion experiments, an algorithm has been developed to achieve the high-throughput data analysis. The well-designed minisensor can be potentially used for high-throughput corrosion experiments. Combined with the developed algorithm for high-throughput analysis, this study provided a platform to explore the application of electrochemical sensors for the in situ corrosion monitoring of materials in high-throughput molten-salt corrosion experiments.

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Corrosion behavior of boronized nickel-based alloys in the molten chloride Salt

Cited by 25 publications

References 19 publications

Increasing corrosion resistance of AISI 1010 steel by boride coatings

Increasing corrosion resistance of AISI 1010 steel by boride coatings

Tribological Behavior of Boronized Fe40Mn20Cr20Ni20 High-Entropy Alloys

In Situ Corrosion Monitoring of the T91 Alloy in a Molten Chloride Salt Using a Miniaturized Electrochemical Probe for High-Throughput Applications

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