The formation and mechanism of oxides film on GCr15 bearing steel under indoor atmospheric exposure

Article Materials Science, Multidisciplinary

Understanding in compositional phases of carbon steel rust layer with a long-term atmospheric exposure

Fengjing Wu et al.

Summary: Previous studies have suggested that the rust layer on plain carbon steels primarily consists of gamma-FeOOH, while that on weathering steels mainly contains alpha-FeOOH. However, this research has found that even after long-term atmospheric exposure, the rust layer on plain carbon steel is still predominantly composed of alpha-FeOOH.

MATERIALS LETTERS (2022)

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Article Materials Science, Multidisciplinary

Characterization of machined surface quality and near-surface microstructure of a high speed thrust angular contact ball bearing

Di Wu et al.

Summary: This paper systematically characterized a typical high-speed thrust angular contact ball bearing using various microscopy and surface testing instruments, and detected potential precursors causing rolling contact fatigue, laying the foundation for further research on the failure mechanism of rolling bearings.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2021)

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Article Materials Science, Multidisciplinary

Temperature and NaCl deposition dependent corrosion of SAC305 solder alloy in simulated marine atmosphere

Chuang Qiao et al.

Summary: The research found that NaCl deposition and temperature have significant effects on the corrosion evolution of SAC305 solder joints, with high NaCl deposition prolonging the corrosion process, high temperature accelerating evaporation and leading to thinner film formation, affecting the formation of corrosion product layer.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2021)

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Article Materials Science, Multidisciplinary

A perspective on effect by Ag addition to corrosion evolution of Pb-free Sn solder

Chuang Qiao et al.

Summary: The corrosion effect of Ag addition on Sn solder is influenced by the formed surface oxide film, where the oxide film on Sn-Ag solder is more susceptible to NaCl electrolyte attack compared to pure Sn solder. Variations in oxide film thickness among Ag3Sn and beta-Sn phases, along with defects at boundaries, facilitate Cl- preferential adsorption. Additionally, galvanic effect between Ag3Sn and beta-Sn contributes to further corrosion after oxide film deterioration.

MATERIALS LETTERS (2021)

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Article Materials Science, Multidisciplinary