Article
Chemistry, Inorganic & Nuclear
Hongyang Zhang, Jianqiu Wang, Long Hao, Song Zhang, Chunhua Zhang
Summary: Current studies on atmospheric corrosion of steel mainly focus on outdoor structural applications and pay little attention to the indoor atmospheric corrosion of steel parts. This work investigates the formation of thin oxide film on GCr15 bearing steel substrate in indoor atmospheric exposure. The results show that the oxide film thickens rapidly during the initial aging period and then stabilizes with extended aging time. The corrosion resistance of the oxide film initially enhances and then stabilizes as well. The composition of the oxide film is determined to be alpha-FeOOH.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Chunlong Cheng, Zheng Chen, Yu Fan, Lin Wang, Jie Xu, Qichi Le
Summary: The corrosion protection performance of the high temperature oxide film of the AZ80-0.38Nd alloy was investigated before and after CO2 mineralization treatment. The results showed that CO2 mineralization treatment could fill cracks and holes, resulting in densification of the oxide film. Compared with the oxide film, the modified film increased the corrosion potential (Ecorr) of the alloy from -1.41 VSCE to -1.33 VSCE, and reduced the corrosion current density (icorr) of the alloy from 1.62 x 10-4A/cm2 to 2.47 x 10-5A/cm2. The oxide film after CO2 mineralization exhibited better corrosion protection performance.
Article
Materials Science, Multidisciplinary
J. Jaume, M. J. F. Marques, M. L. Delia, R. Basseguy
Summary: The influence of microorganisms from a salt marsh on the surface modification of 5083 aluminum alloy in seawater was evaluated, showing that microorganisms induced the formation of a homogenous layer on the alloy surface composed of a double structure, affecting its corrosion resistance.
Article
Chemistry, Physical
Jiaying Huang, Siyu Feng, Shiyong Li, Cuilan Wu, Jianghua Chen
Summary: The study systematically investigated the localized corrosion behavior and microstructure of an Al-2.23Cu-0.96Li (wt%) alloy using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that the GPB zones in the alloy do not significantly affect the overall propagation direction of crystallographic corrosion, but are closely related to the formation of nanoscale localized corrosion morphology in the crystallographic corrosion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Angela Bermudez-Castaneda, Anna Igual-Munoz, Stefano Mischler
Summary: Modular hip joint implants have advantages in arthroplasty procedures, but may undergo crevice corrosion in certain cases, as demonstrated through laboratory tests and theoretical modeling. The results showed that crevice corrosion of Ti6Al4V or CoCr is not expected to occur in typical crevices formed at the stem-neck junction of hip implants.
Article
Materials Science, Multidisciplinary
Qiao Zeng, Xuehong Min, Zhigang Luo, Houfu Dai, Bokai Liao
Summary: Superhydrophobic Zn-Al layered double hydroxides (LDHs) coatings were synthesized on the surface of 3003 aluminum alloy using hydrothermal and impregnation methods. The corrosion resistance of the coatings was significantly enhanced, and the effect of different dopants on corrosion performance was studied.
Article
Materials Science, Multidisciplinary
Mingjin Wu, Feifei Wu, Mengjun Long, Pengcheng Ye, Feng Jiang, Jingyu Jiang
Summary: The oxidiation behavior of Al-Mg-Sc alloy at 200 degrees C was investigated, with analysis of the structure and composition of the oxide film on the alloy surface. It was found that MgAl2O4 was mainly distributed at the bottom of the oxide film, promoting its formation at the interface.
Article
Materials Science, Multidisciplinary
Jia Chen, Zhengyu Zhang, Eitan Hershkovitz, Jonathan Poplawsky, Raja Shekar Bhupal Dandu, Chang-Yu Hung, Wenbo Wang, Yi Yao, Lin Li, Hongliang Xin, Honggyu Kim, Wenjun Cai
Summary: In this study, the structural origin of the pH-dependent repassivation mechanisms in multi-principal element alloys (MPEA) was investigated using surface characterization and computational simulations. It was found that selective oxidation in acidic to neutral solutions leads to enhanced nickel enrichment on the surface, resulting in reduced repassivation capability and corrosion resistance.
Article
Engineering, Biomedical
Claudia Garcia-Mintegui, Laura Catalina Cordoba, Judit Buxadera-Palomero, Andrea Marquina, Emilio Jimenez-Pique, Maria-Pau Ginebra, Jose Luis Cortina, Marta Pegueroles
Summary: This study investigates the mechanical properties, biodegradability and biocompatibility of Zn-Mg and Zn-Cu alloys for potential use in bioresorbable cardiovascular stents. The addition of Mg or Cu alloying elements refines the microstructure of Zn while improving yield strength and ultimate tensile strength. Both Zn-1Mg and Zn-Cu alloys showed promising results in terms of degradation stability and antibacterial effects.
BIOACTIVE MATERIALS
(2021)
Article
Chemistry, Physical
Qiang Li, Xudong Zhang, Shuang Ben, Zhihong Zhao, Yuzhen Ning, Kesong Liu, Lei Jiang
Summary: By designing a micro/nano structure-functional molecule superhydrophobic composite coating with self-healing and active anti-corrosion properties, the corrosion resistance of magnesium (Mg) alloys was improved, providing new insights for the wide application of Mg alloys and research in the field of metal protection.
Article
Chemistry, Physical
Qiang Li, Xudong Zhang, Shuang Ben, Zhihong Zhao, Yuzhen Ning, Kesong Liu, Lei Jiang
Summary: In this study, a micro/nano structure-functional molecule superhydrophobic composite coating was designed, which can self-heal and exhibit active anti-corrosion properties after damage. The investigation of its anti-corrosion performance and self-healing mechanism expands the application of magnesium alloys and research in the field of metal protection.
Article
Materials Science, Multidisciplinary
Mingjin Wu, Feng Jiang, Jingyu Jiang
Summary: The high temperature oxidation behavior of Al-Mg-Sc alloy was investigated, and the structure, composition and microstructure evolution near the interface were analyzed. The oxide layer was mainly composed of MgO and small amounts of MgAl2O4, and the phenomenon of grain boundary wetting by the second solid phase was observed.
Article
Materials Science, Multidisciplinary
Qiong Wu, Chuang Qiao, Lijuan Feng, Long Hao, Lianfeng Shen, Xizhong An
Summary: The development of electrochemistry-based sensors is crucial for monitoring atmospheric corrosion. In this work, an improved design of a corrosion sensor with exposed Cu teeth height increases its sensitivity under thin electrolyte layers. The sensor shows high sensitivity to low NaCl deposition and is effective in the formation of electrolyte layers.
Article
Materials Science, Multidisciplinary
Jian Zhang, Chunjiang Zhao, Qiaofeng Bai, Qihang Li, Chao Chen, JianGuo Liang
Summary: Fe-based alloy coatings were prepared by high-speed laser cladding (HSLC) technology. The surface was subjected to ultrasonic high-frequency percussion (UH-FP), resulting in smaller dendrites and smoother surface profile with a mirror effect. The roughness decreased from 2.643 μm to 0.913 μm and the residual stress changed from 306.92 MPa to -92.18 MPa. The UH-FP coatings exhibited higher corrosion resistance in a 3.5% NaCl solution, and the anti-corrosion mechanism was discussed based on residual stress and roughness.
Article
Materials Science, Multidisciplinary
Chao Yang, Liyuan Sheng, Chaochao Zhao, Di Wu, Yufeng Zheng
Summary: The corrosion of magnesium alloys poses a limitation to their practical applications. By incorporating corrosion-resistant nanoparticles in microarc oxidation (MAO) coating, the corrosion resistance performance can be enhanced. However, excessive addition of these nanoparticles may lead to other issues. In this study, the structure of the MAO passivation layer was regulated using F- salts to generate a low dielectric constant MgF2 phase, reducing the high discharge voltage.