Investigation of corrosion characteristics of Cu-10Ni-1.2Fe-<i>x</i>Mn (<i>x</i> = 0.53, 0.87, 1.19) alloy in 3.5% NaCl solution

Zhu, Zhiyun; Li, Shuhao; Zhang, Rongwei

doi:10.1039/d0ra10678j

Cited by 9 publications

(3 citation statements)

References 34 publications

(35 reference statements)

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“…The cathodic and anodic polarization curves shown in Figure a revealed the typical polarization characteristics of the unalloyed Cu and Cu–Ni alloys in aqueous NaCl solutions. [ 29,30 ] An obvious positive shift in the corrosion potential and a decrease in the corrosion current density with increasing Ni concentration of NP‐CuNi are shown in Figure 8b. The NP‐CuNi alloys exhibited good corrosion resistance.…”

Section: Resultsmentioning

confidence: 99%

Ni²⁺‐Assisted Dealloying Strategy to Prepare Nanoporous Cu–Ni Alloys with Enhanced Corrosion Resistance

Yang,

Zhang,

Wang

et al. 2023

Adv Eng Mater

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To address the challenges associated with preparation of nanoporous Cu–Ni (NP‐CuNi) alloys containing high Ni concentrations, we propose a Ni2+‐assisted dealloying strategy. The proposed strategy involves a three‐stage dealloying process primarily driven by dynamic Ni deposition/dissolution. The Ni concentration in NP‐CuNi was tuned by altering the Ni content of the Cu–Mn precursor alloy and Ni2+ in a H2SO4 solution. The Ni concentration of the nanoporous Cu66.5Ni28.5Mn5 alloy prepared in a H2SO4+NiSO4 solution was increased by 5.2 times compared to that of the alloy prepared in the H2SO4 solution alone. Moreover, the corrosion resistance test demonstrated a reduction in corrosion current density by 58.3% compared to NP‐Cu.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

Ni²⁺‐Assisted Dealloying Strategy to Prepare Nanoporous Cu–Ni Alloys with Enhanced Corrosion Resistance

Yang,

Zhang,

Wang

et al. 2023

Adv Eng Mater

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“…The corrosion resistance of the material is closely related to the protection of the corrosion product film formed during use, and the protection of the passivation film is determined by its composition, structure, thickness and adhesion to the substrate [20]. Therefore, deepening the understanding of passivation films is the key to study the corrosion behavior of Al-Sn alloys.…”

Section: Morphology Of Corrosion Productsmentioning

confidence: 99%

Effect of electromagnetic stirring current on microstructure and corrosion resistance of Al–Sn Alloy

Guo

et al. 2022

Mater. Res. Express

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Al-Sn bearing alloys were prepared with different electromagnetic stirring (EMS) currents. Electrochemical and immersion corrosion experiments were carried out on the samples. Optical microscope, SEM, EDS, and XPS were used to characterize the samples to study the effect of stirring current on the microstructure and corrosion properties of the alloy. The results show that the structure of the sample without EMS is all dendrites. With the increase of stirring current, the number of primary phase agglomerates is less and the grain size decreases. When the stirring parameter is 60A, 20Hz, the grain size is the most round and small, and the stirring effect is the best. In the later stage of immersion, the corrosion product film formed on the surface is more dense and uniform, which can effectively block the erosion of ions in the solution. The equivalent circuit fitting calculation shows that the Rtotal value is the largest, which is 1.79×106 Ω·cm², and the corrosion resistance is the best.

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“…The R p of the Q235 steel was 90.06 Ω•cm 2 and 75.96 Ω•cm 2 for 2 d and 3 d, respectively, reaching the maximum value, and the corrosion rate reached the minimum value. This is mainly because the corrosion products with a certain thickness are generated on the surface [34], which greatly hinders the diffusion of ions and results in a sharp decrease in the corrosion rate (seen in Figure 3g). At the middle and late stages of corrosion (4-5 d), the R p of the Q235 steel decreased to 53.10 Ω•cm 2 for 4 d and 58.84 Ω•cm 2 for 5 d. It may be that the morphology and structure of the corrosion products changed with the progress of the corrosion [18,35].…”

Section: Corrosion Ratementioning

confidence: 99%

Effect of Corrosion Time on the Synergistic Corrosion of Q235 Steel in Sodium Aluminate Solutions

Quan

Chen

2021

Metals

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During Bayer alumina production with high-sulfur bauxite, the sulfide ions in the sodium aluminate solution caused serious corrosion to Q235 steel, which is the material of the tank equipment. This study investigates the effect of corrosion time on Q235 steel synergistic corrosion in sodium aluminate solution using the weight-loss method and electrochemical measurements. The results indicate that the corrosion rate decreases sharply, the rate equation satisfies the mathematical model of power function at the initial stage of corrosion, and the transformation of unstable iron sulfide to stable iron oxide at the later stage results in the decrease in sulfur content in the corrosion products and surface pseudo-passivation. There are two main types of corrosion products, as follows: one is the octahedral crystal particle, which is composed of Fe2O3, Fe3O4, Al2O3 and NaFeO2, and the other is the interlayer corrosion between the surface layer and the matrix, which is composed of FeS, FeS2 and MnS2. At day 3, the dynamics of the Q235 steel electrode is controlled by charge transfer and ion diffusion. However, at other times the dynamics are mainly controlled by charge transfer.

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Investigation of corrosion characteristics of Cu-10Ni-1.2Fe-xMn (x = 0.53, 0.87, 1.19) alloy in 3.5% NaCl solution

Abstract: Cupronickel alloys have been broadly utilized in various fields due to their excellent properties.

Cited by 9 publications

References 34 publications

Ni²⁺‐Assisted Dealloying Strategy to Prepare Nanoporous Cu–Ni Alloys with Enhanced Corrosion Resistance

Ni²⁺‐Assisted Dealloying Strategy to Prepare Nanoporous Cu–Ni Alloys with Enhanced Corrosion Resistance

Effect of electromagnetic stirring current on microstructure and corrosion resistance of Al–Sn Alloy

Effect of Corrosion Time on the Synergistic Corrosion of Q235 Steel in Sodium Aluminate Solutions

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Investigation of corrosion characteristics of Cu-10Ni-1.2Fe-xMn (x = 0.53, 0.87, 1.19) alloy in 3.5% NaCl solution

Abstract: Cupronickel alloys have been broadly utilized in various fields due to their excellent properties.

Cited by 9 publications

References 34 publications

Ni2+‐Assisted Dealloying Strategy to Prepare Nanoporous Cu–Ni Alloys with Enhanced Corrosion Resistance

Ni2+‐Assisted Dealloying Strategy to Prepare Nanoporous Cu–Ni Alloys with Enhanced Corrosion Resistance

Effect of electromagnetic stirring current on microstructure and corrosion resistance of Al–Sn Alloy

Effect of Corrosion Time on the Synergistic Corrosion of Q235 Steel in Sodium Aluminate Solutions

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Product

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Ni²⁺‐Assisted Dealloying Strategy to Prepare Nanoporous Cu–Ni Alloys with Enhanced Corrosion Resistance

Ni²⁺‐Assisted Dealloying Strategy to Prepare Nanoporous Cu–Ni Alloys with Enhanced Corrosion Resistance