Electrochemical Dissolution Behavior and the Residue Formation Mechanism of Laboratory Made Carbonyl Nickel

Moula, Md. Golam; Szymański, G.; Shobeir, B.; Huang, Hsin‐Yi; Burgess, Ian J.; Chen, A.; Lipkowski, Jacek

doi:10.1016/j.electacta.2014.12.118

Cited by 8 publications

(16 citation statements)

References 39 publications

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“…The sample was then cut and polished to a mirror finish in order to monitor the initial grain structure of the laboratory-grown Ni sample. At this stage, the procedure previously described by Moula et al [5] was used to perform the dissolution experiments. The morphology of the polished Ni sample was investigated by scanning electron microscopy (SEM) and white light interference microscopy (WLIM).…”

Section: Methodsmentioning

confidence: 99%

“…The dissolution conditions used in the previous paper by Moula et al [5] were also applied in this work. A Watts nickel plating bath (NiSO4•7H2O (240 g/L), NiCl2•6H2O (20 g/L), H3BO3 (20 g/L) was used as the supporting electrolyte.…”

Section: Methodsmentioning

confidence: 99%

“…Further breakdown of the surrounding passive layer is achieved due to the increase of the local H3O + concentrations, as a result of hydrolysis of Ni 2+ and reformation of the oxide layer due to the reaction between Ni 2+ and water. [5] The egress of H3O + ions from the pit creates a hemispherical diffusion wave that assists in the breakdown of the passive layer and initiates secondary pitting leading to the creation of the pits clusters seen in Figure 6a [3,[22][23][24][25]. The secondary pits contribute further to the increase of the H3O + concentration.…”

Section: Changes Of Potential Of the Nickel Electrode With Timementioning

confidence: 99%

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Electrochemical dissolution of nickel produced by the Mond method under alternating temperatures and nickel carbonyl gas pressures

Morrison

Leitch

Szymański

et al. 2018

Electrochimica Acta

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Changes Of Potential Of the Nickel Electrode With Timementioning

confidence: 99%

See 1 more Smart Citation

Electrochemical dissolution of nickel produced by the Mond method under alternating temperatures and nickel carbonyl gas pressures

Morrison

Leitch

Szymański

et al. 2018

Electrochimica Acta

Self Cite

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“…For the sedimentary liquids containing the same additional NaCl, the corresponding sedimentary liquid from hydro‐stabilizing feed oil possesses the most powerful causticity, while that from diesel get the weakest corrosivity. In general, Cl − is provided with high ionic activity and penetrability, which could damage the metal oxide film formed on the steel . Due to the long‐term bathing of internal bottom plates in the sedimentary liquid, the surface of metal plates always stays in the balance between precipitating and dissolving, while the dissolving surface part easily leads to the local spot corrosion in the presence of Cl − .…”

Section: Resultsmentioning

confidence: 99%

Corrosion of sedimentary liquids on internal bottom plate of tanks among coal liquefaction process

Wang

Jiang

et al. 2018

Process Safety Progress

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The leakage accidents due to the corrosion on the internal bottom plates occurred frequently in the tanks which are involved in the first commercial direct coal liquefaction production line. For comprehending the corrosion, the compositions of the sedimentary liquids from diesel, hydro‐upgrading feed oil, heavy solvent oil, thick condensed oil and hydro‐stabilizing feed oil are surveyed in the first place, the results show that all the sedimentary liquids are almost neutral; the cations and anions in all sedimentary liquids are the same; the majority of ions are Ca2+, Cl−, and SO42− in these five sedimentary liquids. Then the immersion and electrochemical tests are implemented, it is represented that corrosion of same sedimentary liquid on Q235 steel coupon is severer than that on 16MnR steel coupon; the sedimentary liquid from hydro‐stabilizing feed oil has the most violent causticity; all the corrosives may hold the Fe2CO3 and Fe2O3; the polarization behavior of Q235 steel in the sedimentary liquid from hydro‐stabilizing feed oil is similar to that of 16MnR steel. Finally, the influences of different ions on the corrosivity of sedimentary liquids are also investigated, it can be concluded that the 672‐h general corrosion rates of Q235 and 16MnR steel coupons in all sedimentary liquids increase with improve of Cl‐ content but decrease with rising of SO42− content; in the sedimentary liquids containing large numbers of Cl‐ and Ca2+, the Ca2+ is the definitely vital ion which deeply influences the corrosivity of sedimentary liquids. The achievement of this research work also can be applied in the prevention for corrosion formed on the internal bottom plates of tanks referred to the direct coal liquefaction process. © 2018 American Institute of Chemical Engineers Process Saf Prog 37: 506–517, 2018

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“…[10] Therefore, transpassivation is generally regarded as a type of corrosion damage to a passivated metal or alloy. Investigation of the transpassive dynamics have mainly focused on iron, [11][12][13][14] chromium, [15][16] nickel, [17][18][19][20][21][22][23][24] copper, [25] and also alloys; [26][27] but little attention has been paid to noble metals, such as platinum and gold.…”

Section: Introductionmentioning

confidence: 99%

Periodic Transition between Breathing Spots and Synchronous Sulfur Deposition/Dissolution in Transpassive Region of the Electro‐Oxidation of Sulfide on Platinum

et al. 2017

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In the transpassive region of sulfide electro‐oxidation on platinum, the system displayed different complex oscillations under potentiostatic control experiments, changing from quasiperiodic small oscillations to alternate modes between small and large amplitude oscillations for increasing applied voltages. In each period of the alternating‐mode oscillations, the current density evolves from a slightly decreasing steady state to small and large amplitude oscillations. Spatiotemporal patterns developed on the platinum disk were recorded with a CCD camera and ranged from breathing spots to alternating patterns between breathing spots and synchronous deposition/dissolution. Karhunen‐Loève decomposition analysis of the experimental patterns showed that the twinkling patterns had multiple modes each with a low percentage of energy, whereas the alternate patterns were mainly characterized by one dominant mode.

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Electrochemical Dissolution Behavior and the Residue Formation Mechanism of Laboratory Made Carbonyl Nickel

Cited by 8 publications

References 39 publications

Electrochemical dissolution of nickel produced by the Mond method under alternating temperatures and nickel carbonyl gas pressures

Electrochemical dissolution of nickel produced by the Mond method under alternating temperatures and nickel carbonyl gas pressures

Corrosion of sedimentary liquids on internal bottom plate of tanks among coal liquefaction process

Periodic Transition between Breathing Spots and Synchronous Sulfur Deposition/Dissolution in Transpassive Region of the Electro‐Oxidation of Sulfide on Platinum

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