Mechanism of the dual effect of Te addition on the localised corrosion resistance of 15–5PH stainless steel

Yang, Shufeng; Che, Zhichao; Liu, Chao; Liu, Wei; Li, Jingshe; Cheng, Xuequn; Li, Yong

doi:10.1016/j.corsci.2023.110970

Cited by 31 publications

(4 citation statements)

References 63 publications

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“…The high-resolution Pd 3d spectrum in Figure b consists of two main peaks appearing at 335.4 and 340.6 eV, representing the 3d 5/2 and 3d 3/2 branches of Pd 0 , respectively. , Two additional peaks are detected at 336.7 and 342.3 eV, which are associated with high-valence Pd 2+ . From Figure c, the Te 3d spectra for Pd x Te y consist of four subpeaks corresponding to Te 0 3d 5/2 (573.4 eV), Te 0 3d 3/2 (583.8 eV), Te 4+ 3d 5/2 (575.9 eV), and Te 4+ 3d 3/2 (586.3 eV). − Noteworthily, Pd has increasing binding energy as the Pd/Te ratio decreases, whereas, the binding energy of tellurium decreases as the Pd/Te ratio decreases. This phenomenon confirms the strong interaction between Pd and Te in alloys, highlighting the feasibility of valence state modulation by changing the stoichiometric ratio of raw materials.…”

Section: Resultsmentioning

confidence: 96%

Construction of Pd–Te Intermetallic Compounds to Achieve Ultrastable Oxygen Reduction Activity

Guo,

Zheng,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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Palladium (Pd)-transition metal alloys have the potential to regulate the intermediate surface adsorption strength in oxygen reduction reactions (ORR), making them a promising substitute for platinum-based catalysts. Nonetheless, prolonged electrochemical cycling can lead to the depletion of transition metals, resulting in structural degradation and poor durability. Herein, the synthesis of alloy catalysts (Pd 25% Te 75% ) containing Pd and the metalloid tellurium (Te) through a one-step reduction method is reported. Characterizations of powder X-ray photoelectron spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy demonstrated both uniform dispersion and strong binding force of elements within the PdTe alloy, along with providing crystallographic details of associated compounds. Based on density functional theory calculations, PdTe had a more negative d-band center than that of pure Pd, which reduces the adsorption capacity between active sites and intermediates in the ORR, and therefore enhances reaction kinetics. The Pd 25% Te 75% exhibited excellent ORR activity, and its onset and half-wave potentials were ∼0.98 and ∼0.90 V, respectively, at 1600 rpm within the O 2 -saturated 1.0 M KOH. Significantly, accelerated durability tests achieved exceptional stability, and half-wave potential just decayed by 4 mV after 30000 consecutive cycles. Moreover, this study aims to promote the preparation of Pd and metalloid alloys for other energy conversion applications.

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Section: Resultsmentioning

confidence: 96%

Construction of Pd–Te Intermetallic Compounds to Achieve Ultrastable Oxygen Reduction Activity

Guo,

Zheng,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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“…Metal atoms adjacent to a dislocation core that intersects the exposed metal surface also have higher free energy than atoms distant from it, which may indicate that emergent ends of edge/screw dislocations are the preferred sites for corrosion redox reactions 29,59,60,68 . Hence, localized corrosion is favorably initiated at these locations to relieves stored energy through the metal/electrolyte interface 21,29,69 . Corrosion spots without inclusion inside them, such as the one shown in Fig.…”

Section: Mechanism Of the Corrosion Initiation And Propagationmentioning

confidence: 99%

Influence of cementite coarsening on the corrosion resistance of high strength low alloy steel

Liu

Che

et al. 2023

npj Mater Degrad

Self Cite

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The impact of heat treatment on the initiation and progression of localized corrosion in E690 steel in a simulated marine environment was investigated systematically. The primary cause of localized corrosion was the presence of inclusions, which led to the dissolution of the distorted matrix surrounding them. In the initial stages of corrosion, localized corrosion resulting from inclusions was the predominant form. The chemical and electrochemical mechanisms underlying matrix deformation and localized corrosion caused by inclusions were meticulously elucidated. As the immersion time was extended, the galvanic contributions at the ferrite-austenite interfaces, as well as the coarsened carbides, reduced the polarization resistance in the annealed specimen, accelerating the corrosion rate compared to the lath martensite in the as-received specimen. Consequently, the heat-treated sample promoted a transition from localized to uniform corrosion. Finally, a model was established to describe the corrosion behavior of E690 steel in the marine environment.

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“…[7] Inclusions are inevitable by-products of steel, and inclusions with different compositions induce localized corrosion through various mechanisms. [8][9][10] Al 2 O 3 is a standard nonmetallic inclusion widely used in ceramic composites and oxide film coatings. [11,12] It is significant to reveal the corrosion mechanism caused by Al 2 O 3 inclusions.…”

Section: Introductionmentioning

confidence: 99%

“…[ 7 ] Inclusions are inevitable by‐products of steel, and inclusions with different compositions induce localized corrosion through various mechanisms. [ 8–10 ]…”

Section: Introductionmentioning

confidence: 99%

Effect of Elements Segregation at α‐Fe/Al₂O₃ Interface on Microareas Corrosion Activity around Al₂O₃ Inclusions

Hou,

Chen,

2024

steel research int.

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Segregation of interface elements is the main factor affecting the corrosion activity of microareas around Al2O3 inclusions rather than galvanic corrosion. In this work, the effects of segregation of Cu, V, Ni, Mo, B, and P elements on the interfacial bonding strength and microareas corrosion activity around Al2O3 inclusions are analyzed in detail using 3D atomic probe and first‐principles calculations. In the results, it is shown that Cu, V, Mo, B, and P elements reduce the stability of the α‐Fe/Al2O3 interface. In addition, the segregation of Cu, V, Mo, B, and P elements at the interface also enhances the adsorption capacity of Cl and ultimately improves the microarea corrosion activity around Al2O3 inclusions. Ni element can enhance the stability of α‐Fe/Al2O3 interface, and the segregation of Ni element at the interface weakens the adsorption capacity of Cl and ultimately reduces the microarea corrosion activity around Al2O3 inclusions.

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Mechanism of the dual effect of Te addition on the localised corrosion resistance of 15–5PH stainless steel

Cited by 31 publications

References 63 publications

Construction of Pd–Te Intermetallic Compounds to Achieve Ultrastable Oxygen Reduction Activity

Construction of Pd–Te Intermetallic Compounds to Achieve Ultrastable Oxygen Reduction Activity

Influence of cementite coarsening on the corrosion resistance of high strength low alloy steel

Effect of Elements Segregation at α‐Fe/Al₂O₃ Interface on Microareas Corrosion Activity around Al₂O₃ Inclusions

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Mechanism of the dual effect of Te addition on the localised corrosion resistance of 15–5PH stainless steel

Cited by 31 publications

References 63 publications

Construction of Pd–Te Intermetallic Compounds to Achieve Ultrastable Oxygen Reduction Activity

Construction of Pd–Te Intermetallic Compounds to Achieve Ultrastable Oxygen Reduction Activity

Influence of cementite coarsening on the corrosion resistance of high strength low alloy steel

Effect of Elements Segregation at α‐Fe/Al2O3 Interface on Microareas Corrosion Activity around Al2O3 Inclusions

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Effect of Elements Segregation at α‐Fe/Al₂O₃ Interface on Microareas Corrosion Activity around Al₂O₃ Inclusions