Revisiting Cl-Induced Degradation of MnS Inclusions Using DFT

Ng, Man‐Fai; Blackwood, Daniel John; Jin, Hongmei; Tan, Teck Leong

doi:10.1021/acs.jpcc.1c07419

Cited by 7 publications

(3 citation statements)

References 36 publications

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“…While the passive film is growing and dissolving dynamically in the solution, our work suggests that the most detrimental sites are the intermetallic phases where passivity breakdown tends to take place in chloridecontaining solution. This is due to the variations of film growth reactions at the alloy/film interface in the presence of intermetallic phases, [30] such as the MnS phase for stainless steels, [26,31] Cu-rich phase for Al-Cu alloys, [32] and Nb-segregated phase for Ni-based alloys, [33] which are well accepted by the peers, and the correlation between the intermetallic particle phases and the occurrence of pitting corrosion is also evidenced in this work (see Figure 12).…”

Section: Discussionmentioning

confidence: 99%

Insight into the pitting corrosion behavior of laser‐welded R60702 zirconium alloy in chloride electrolyte

Ren,

Wang,

et al. 2024

Materials & Corrosion

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This work aims to analyze the passivation and pitting corrosion behaviors of laser beam welded R60702 zirconium alloy in neutral and acidic chloride‐containing electrolytes. Potentiodynamic polarization and electrochemical impedance spectroscopy measurements are carried out to investigate the electrochemical performance of the welding joint. Scanning electron microscope, X‐ray diffraction, and three‐dimensional profile digital microscope are utilized to reveal the microstructures and corrosion morphologies. The electrochemical results show that the heat‐affected zone (HAZ) and weld zone have nearly equal corrosion performance, and both of them are more corrosion‐resistant than the base metal. The corrosion morphologies suggest that the HAZ has the lowest sensitivity to pitting corrosion. Moreover, it is unraveled that, in chloride‐containing electrolytes, the quantity and distribution of Zr(Fe,Cr)2 particle phases are the main factors that determine the different corrosion performances of the welding joint.

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Section: Discussionmentioning

confidence: 99%

Insight into the pitting corrosion behavior of laser‐welded R60702 zirconium alloy in chloride electrolyte

Ren,

Wang,

et al. 2024

Materials & Corrosion

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“…As the previous calculations indicated, the pure surface exhibits the strongest Cl adsorption on Al(4) site, while for Cu/Mg doped surfaces, the weaker Cl adsorption on X(4) site might introduce competition between Al-O and Al-Cl bonding under structure optimized conditions, leading to more active surfaces. 33 For Cu/Mg doped surfaces, Al(3) site was the most stable site for Cl adsorption.…”

Section: Effects Of Doped Atoms On Adsorption Behavior Ofmentioning

confidence: 94%

Corrosion Susceptibility of Passive Films on 1060, 2024, and 5083 Aluminum Alloys: Experimental Study and First-Principles Calculations

Xia

et al. 2023

J. Electrochem. Soc.

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The corrosion characteristics of passive films on 1060, 2024, and 5083 aluminum alloys formed in citric acid solution are studied in Cl–-containing solutions by combining scanning electron microscope, X-ray photoelectron spectroscopy, and electrochemical impedance spectroscopy. The passive film on 1060 pure Al exhibits the best corrosion resistance while the presence of alloying elements (Cu and Mg) in the passive films reduce the corrosion resistance of the passive films on 2024 and 5083 Al alloys. According to first-principles calculations, Cu/Mg doping γ-Al2O3 surfaces are looser and more reactive than pure γ-Al2O3 (110) surface, and Cl adsorption behavior is changed in Cu/Mg doping γ-Al2O3 surfaces. This illuminates the difference of corrosion resistances of 1060, 2024, and 5083 aluminum alloys from the aspects of the passive film structure and interaction of chlorine ions with the passive films.

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“…Noted that we did not consider the possibility of inclusions impacting the corrosion in this work. 24…”

Section: 16mentioning

confidence: 99%

First-Principles Investigation into the Contributions of ORR and HER in Magnesium Corrosion

Blackwood

Jin

et al. 2023

J. Electrochem. Soc.

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Recent experiments have demonstrated that oxygen reduction reaction (ORR) can contribute significantly to Mg corrosion in addition to hydrogen reduction reaction (HER). However, its contributions at various stages of Mg corrosion remains unclear. Using density functional theory calculations, we investigate ORR and HER on both pristine and Fe/Mn-alloyed Mg, MgO and Mg(OH)2 during Mg corrosion. We found that both HER and ORR on pristine and alloyed Mg contribute to the overall cathodic current density: HER contributes much more significantly than ORR, while the ORR contribution is up to the mass transport limit and would diminish over time. In addition, we found that ORR activities on Fe/Mn alloyed MgO are high, suggesting an alternate source of cathodic ORR contribution during the whole course of Mg corrosion. Excellent agreements are found between our findings and a recent experiment.

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Revisiting Cl-Induced Degradation of MnS Inclusions Using DFT

Cited by 7 publications

References 36 publications

Insight into the pitting corrosion behavior of laser‐welded R60702 zirconium alloy in chloride electrolyte

Insight into the pitting corrosion behavior of laser‐welded R60702 zirconium alloy in chloride electrolyte

Corrosion Susceptibility of Passive Films on 1060, 2024, and 5083 Aluminum Alloys: Experimental Study and First-Principles Calculations

First-Principles Investigation into the Contributions of ORR and HER in Magnesium Corrosion

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