Electrochemical Behavior of Three 90Cu-10Ni Tubes from Different Manufacturers After Immersion in 3.5% NaCl Solution

Ekerenam, Okpo O.; Ma, Aiyuan; Zheng, Yuan; Emori, Wilfred

doi:10.1007/s11665-017-2566-1

Cited by 26 publications

(10 citation statements)

References 38 publications

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“…Such behavior has been explained in the literature on copper and copper alloys [ 19 , 20 , 21 ]. When immersed in chloride-containing solutions, the main anodic reaction of copper and its alloys is the dissolution process of copper according to

the cathode reaction is mainly the process of oxygen reduction

…”

Section: Resultsmentioning

confidence: 81%

Effect of Al Element on the Microstructure and Properties of Cu-Ni-Fe-Mn Alloys

et al. 2018

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The effects of aluminum on the mechanical properties and corrosion behavior in artificial seawater of Cu-Ni-Fe-Mn alloys were investigated. Cu-7Ni-xAl-1Fe-1Mn samples, consisting of 0, 1, 3, 5, and 7 wt % aluminum along with the same contents of other alloying elements (Ni, Fe, and Mn), were prepared. The microstructure of Cu-7Ni-xAl-1Fe-1Mn alloy was analyzed by Transmission Electron Microscopy (TEM), and its corrosion property was tested by an electrochemical system. The results show that the mechanical and corrosion properties of Cu-7Ni-xAl-1Fe-1Mn alloy have an obvious change with the aluminum content. The tensile strength has a peak value of 395 MPa by adding 3 wt % aluminum in the alloy. Moreover, the corrosion rate in artificial seawater of Cu-7Ni-3Al-1Fe-1Mn alloy is 0.0215 mm/a which exhibits a better corrosion resistance than the commercially used UNS C70600. It is confirmed that the second-phase transformation of Cu-7Ni-xAl-1Fe-1Mn alloy follows the sequence of α solid solution → Ni3Al → Ni3Al + NiAl → Ni3Al + NiAl3. The electrochemical impedance spectroscopy (EIS) shows that the adding element aluminum in the Cupronickel can improve the corrosion resistance of Cu-7Ni-xAl-1Fe-1Mn alloy.

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the cathode reaction is mainly the process of oxygen reduction

…”

Section: Resultsmentioning

confidence: 81%

Effect of Al Element on the Microstructure and Properties of Cu-Ni-Fe-Mn Alloys

et al. 2018

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“…The closer the n value is to 1, the closer the element is to the ideal capacitance). The formula for calculating the total film resistance is shown in the below equation [ 22,25 ] :

{R}_{\mathrm{total}}={R}_{\mathrm{ct}}+{R}_{{\rm{f}}1}.

…”

Section: Results and Analysismentioning

confidence: 99%

“…After that, the EIS diagram is fitted and analyzed by ZSim Demo software, and the kinetic model of the corrosion process is constructed. Combined with the previous references, [21,22] the equivalent circuit diagram obtained by fitting is shown in Figure 8. In this model, a constant phase element (CPE) is used instead of an ideal capacitance element because ideal capacitance elements are difficult to apply to real electrochemical processes due to the heterogeneity of the electrode surface.…”

Section: Electrochemical Corrosion Testmentioning

confidence: 91%

Effect of Fe/Mn content on mechanical and corrosion properties of 90/10 copper–nickel alloy

Shao

Gao

et al. 2022

Materials & Corrosion

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The effect of Fe/Mn content on the metallographic structure, mechanical properties, and corrosion resistance of 90/10 copper–nickel alloy using electrochemical methods, scanning electron microscope, energy dispersive spectroscopy, X‐ray photoelectron spectroscopy, Tafel experiments, and electrochemical impedance spectroscopy measurements were investigated in this paper. The experimental results indicated that the tensile strength of the alloys increases from 326 to 347 MPa with the change of Fe/Mn content, the yield strength of 90/10 copper–nickel alloys is approximately 150 MPa, and the elongation of the alloys was reduced from 51% to 37%. Moreover, as corrosion proceeds, the corrosion product film was mainly composed of Cu2O, Cu2(OH)3Cl. In addition, the Cu–10Ni alloy with Fe/Mn content of 1.69/0.69 has good corrosion resistance properties.

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“…As the corrosion progresses, the passive film on the alloy is gradually complete and dense, and its applicable equivalent circuit diagram will also change accordingly. 20 The equivalent circuit in Fig. 2(b) is used to fit the impedance spectrum after corrosion for 3 days.…”

Section: Resultsmentioning

confidence: 99%