SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Pengxing Yu,Ruoyun Wang,Kai Wang,Huabing Liu,Biyou Peng,Hongjian Huang,Junwu Xiang,Haiyang Zhou,Tong Zhou
To enhance the long-term corrosion resistance of 3D-printed AlSi10Mg alloy, this work designed a two-step micro-arc oxidation (MAO) strategy. Given the difficulty of triggering micro-arc discharge in high-Si Al alloys, an intermediate transition layer was first prepared through one-step MAO in a silicate electrolyte. Subsequently, a two-step MAO treatment was performed in a phosphate electrolyte with the addition of K 2 ZrF 6 to seal the ablation holes formed during the one-step MAO process, achieving a self-sealing effect of the MAO coating. Ultimately, a dense ZrO 2 /Al 2 O 3 ceramic coating with Si-W-Zr-P gradient distribution was obtained on the AlSi10Mg surface after the two-step MAO. Electrochemical tests reveal that the two-step MAO coating exhibits exceptional corrosion resistance, with a remarkably low corrosion current density (I corr ) of 3.42 × 10 −9 A·cm −2 , along with a protective efficiency (η p ) of up to 99.8 %. Moreover, no obvious macroscopic corrosion signs are observed on the ZrO 2 /Al 2 O 3 coating after prolonged immersion, and its I corr remains stable at 9.26 × 10 −9 A·cm −2 , indicating durable protective performance. This study offers a novel and controllable strategy for the design of anti-corrosive coatings on 3D-printed high-Si Al alloys.
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DOI
高影响因子
Journal of Magnesium and Alloys
·
2026
·
IF 15.8
Qinyang Ma,Jing Chen,Guanzhen Mu,Wenjia Wang,Lu Jiang,Longxu Liu,Yan Dong,Xin Liu
The corrosion inhibition performance of sodium fumarate, sodium 2,6-pyridinedicarboxylate, and sodium benzoate was investigated on both bare AZ91D magnesium alloy and micro-arc oxidation (MAO)-treated AZ91D magnesium alloy in 3.5 wt.% NaCl solution. All three inhibitors effectively enhanced the corrosion resistance of the substrates, with high corrosion inhibition efficiency and charge transfer resistance. The inhibition mechanism was attributed to the formation of an adsorption film between the Mg 2+ and COO − , which suppressed the generation of corrosion products such as Mg(OH) 2 , further forming a protective film mainly composed of MgO. Among the three inhibitors, sodium fumarate demonstrated better inhibition performance with a more complete protective layer and fewer corrosion products formed, which may be due to its dual carboxyl groups and unsaturated and flat molecular structure. For the MAO-treated magnesium alloy, the inhibitors provided sequential protection by first adsorbing onto the surface and within the pores of the MAO coating and subsequently protecting the underlying alloy after coating degradation. This study offers valuable insights into the selection of carboxylate corrosion inhibitors for magnesium alloys and supports the development of anticorrosion strategies based on micro-arc oxidation coatings combined with corrosion inhibitors.
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DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Kang Li,Guoge Zhang,Wenfang Li,Shuoxun Jin,Ken Chen,Aihua Yi,Zhongmiao Liao,Wen Zhu,Yi Huang,Zhisheng Zhu,Min Wang,Jiajing Yang,Rujian Liang
The as-deposit (AD) and heat-treated (HT) Al-Cu alloy obtained via wire arc additive manufacturing (WAAM) technology was coated by plasma electrolytic oxidation (PEO), respectively. The reticular big Al 2 Cu grains in the AD Al alloy substrate evolved into numerous small particles and nano precipitates after the heat treatment. The thickness and surface roughness of the PEO coatings on both substrates were increased gradually with the increase of oxidation time. The coating on the HT Al alloy was deposited faster with a rougher surface structure. Although most Al 2 Cu grains were dissolved in the electrolyte at the earlier oxidation stage, some Cu-containing compounds and metallic Cu were gradually deposited in the coatings at the discharge spark oxidation period. The coatings were mainly composed of γ-Al 2 O 3 and α-Al 2 O 3 , and the ratio of α-Al 2 O 3 was increased obviously with the oxidation time. Besides, the coating on the HT sample consisted of a higher ratio of α-Al 2 O 3 than that on the AD alloy, especially at the end of PEO processing. The PEO coatings were made up of two sub-layers, a thin compact inner layer and a porous outer layer. In comparison, the coating on the HT alloy was a bit denser and more uniform. The substrates displayed a adhesion wear trait while the coated samples shew a slight abrasive wear manner over the abrasion test, with a still ball as the friction pair . and the coated HT alloy had a better wear resistance than the coated AD alloy did.
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DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·Vol. 55
·期 5
·3995-4000
·
IF 2.4
Chen Angran,Zhang Yanyun,Coetsee Theresa,Kaldre Imants,Wang Cong
EH36-shipbuilding steel has been welded by CaF 2 -ZrO 2 fluxes with designed ZrO 2 additions. Possible chemical and electrochemical reactions have been postulated to analyze alloying element transfer behaviors. The decomposition of ZrO 2 during SAW has been validated by applying the gas–slag–metal equilibrium model and the O supply capacity of ZrO 2 has been quantified. For the entire compositional range, O content has been controlled within a well-maintained range from 220 to 400 ppm, and the transferred quantity of Zr content reaches to the maximum value of 120 ppm. It is further demonstrated that ZrO 2 addition incurs appreciable Si loss within the weld metal.
研究领域:
材料科学
·
焊接工程
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DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Q. Li,J. Shang
Al 2 O 3 /MoS 2 /CePO 4 composite ceramic layer was in-situ prepared on aluminum alloy by micro-arc oxidation. The results show that the content of (CH 3 CO 3 ) 3 Ce·xH 2 O has a great influence on the microstructure of the ceramic layer. When the addition amount is 7.5 g/L, the surface hardness of the ceramic layer is 961.97 HV 1 , which is 1.8 times that of the unadded and 8.36 times that of the matrix. Tribological tests show that the moderate addition of (CH 3 CO 3 ) 3 Ce·xH 2 O also significantly improves the wear resistance of the ceramic layer. Composite layer research can be developed and applied to other alloys to improve their friction properties.
研究领域:
材料科学
·
表面工程
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DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2024
·
IF 5.4
Jin Wu,Yue Shen,Ping Wang,Zixiang Guo,Jing Bai,Xianli Wang,Dongfang Chen,Xuyang Lin,Chunbo Tang
Magnesium is a revolutionary biomaterial for orthopedic implants, owing to its eminent mechanical properties and biocompatibility. However, its uncontrolled degradation rate remains a severe challenge for its potential applications. In this study, we developed a self-healing micro arc oxidation (MAO) and dicalcium phosphate dihydrate (DCPD) double-passivated coating on a magnesium membrane (Mg-MAO/DCPD) and investigated its potential for bone-defect healing. The Mg-MAO/DCPD membrane possessed a feasible self-repairing ability and good cytocompatibility. In vitro degradation experiments showed that the Mg contents on the coating surface were 0.3, 3.8, 4.1, 6.1, and 7.9% when the degradation times were 0, 1, 2, 3, and 4 weeks, respectively, exhibiting available corrosion resistance. The slow and sustained release of Mg2+ during the degradation process activated extracellular matrix proteins for bone regeneration, accelerating osteogenic differentiation of human bone marrow mesenchymal stem cells (hBMSCs). The extract solutions of Mg-MAO/DCPD considerably promoted the activation of the Wnt and PI3K/AKT signaling pathways. Furthermore, the evaluation of the rat skull defect model manifested the outstanding bone-healing efficiency of the Mg-MAO/DCPD membrane. Taken together, the Mg-MAO/DCPD membrane demonstrates an optimized degradation rate and excellent bioactivity and is believed to have great application prospects in bone tissue engineering.
研究领域:
材料科学
·
生物材料
·
骨科
·
组织工程
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DOI
PubMed
高影响因子
POLYMER
·
2019
·
IF 3.771
Zhao-Hua Mo,Yi-Xian Wu
A novel robust quaternized poly(styrene- b -isobutylene- b -styrene) (QSIBS)-based anion exchange membrane (AEM) could be achieved via quaternization and cross-linking reaction of chloromethylated SIBS with amines in the presence of graphene sheets grafted with polydimethylsiloxane arc-bridges (G -g-Arc PDMS). The resulting cross-linked QSIBS/G- g - Arc PDMS composite membranes exhibit significantly high ion conductivity (σ) and dynamic mechanical properties , marked by low methanol permeability, together with improved chemical stability. The σ of composite AEM with 0.25 wt% of graphene loading reached remarkably to 1.81 × 10 −2 S cm −1 at 60 °C, compared to that (1.15 × 10 −2 S cm −1 ) of QSIBS. This membrane also behaves high storage modulus of 236 MPa even at 150 °C, while Nafion 115 lost its modulus at 150 °C. The homogeneous dispersion of G -g-Arc PDMS in QSIBS matrix leads to a great decrease in methanol permeability to 3.81 × 10 −7 cm 2 s −1 , which is much lower than that of Nafion 115.
研究领域:
材料科学
·
化学工程
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 8
·4778-4786
·
IF 1.134
Qin Lilu,Huang Jiamu,Hao Longlong,Su Jun,Ma Niu,Yin Lingyi
To improve corrosion performance of coatings on AZ31B magnesium alloy, the nano-CeO2 additives were included in Na2SiO3 based electrolyte during process of pulse micro arc oxidation (MAO). The MAO-CeO2 coating was successfully prepared to
characterize its structure, micro morphology and composition. The XRD results indicated that MAO-CeO2 coatings were consisted of Mg2SiO4, MgSiO3, MgF2 and CeO2. The intensity of CeO2 peaks increases with increasing
nano-CeO2 particles in electrolyte. The number of cracks on MAO-CeO2 coatings exhibited a V-shaped trend with increase in nano-CeO2 content. Meanwhile, the influence of nano-CeO2 on corrosion behavior of MAO-CeO2 coatings is investigated
by salt spray test and electrochemical measurement. The corrosion current density of coatings presented same trend and corrosion potential is further studied. The MAO-CeO2 coatings formed in electrolyte with 10 g/L nano-CeO2 showed best corrosion performance which has
the lowest corrosion current density of 0.58 nA/cm2 and the highest corrosion potential of - 1269 mVSCE.
研究领域:
材料科学
·
腐蚀与防护
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Xia Wei,Pengcheng Huan,Guang Ji,Xiaming Chen,Fei Teng,Di Hongshuang,Song Li,Xiaonan Wang
The non-uniformity of microstructure seriously affects the mechanical properties of alloys. In this study, the thermal history at different positions and the heterogeneities of microstructure and properties of directed energy deposition-arc Inconel 718 alloy (DED-Arc IN718) are studied. The results show that the microstructures are composed of Al 2 O 3 + γ(Ni) + (TiN) [nucleus]/(NbC + TiC) [shell] + NbC + Laves. However, the size and morphology of Laves phases along the build direction are obviously different due to the difference of the cooling rate. The thermal cycling process causes precipitation and dissolution of the γ'' phase, resulting in softening and hardening zones in DED-Arc IN718 sample. The presence of softening zone and hardening zone result in extremely heterogeneous mechanical properties along the build direction, with the maximum difference in ultimate tensile strength reaching 54 MPa. The long-striped Laves phases first fail internally during tensile loading to form a crack source, and then the crack propagates along expand along the γ(Ni) matrix. The granular or blocky Laves phase at the top and bottom is beneficial to improve the elongation, and the maximum difference of elongation is 20.1%. This study lays the foundation for further improving the mechanical properties of Inconel 718 alloy.
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DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2023
·Vol. 33
·期 4
·1862-1873
·
IF 2.3
Yan Huanyuan,Liu Wensheng,Ma Yunzhu,Wang Tao,Wu Lei,Yang Lun,Tang Siwei
In this work, Al 2 O 3 ceramic coatings were prepared the surface of powder metallurgy (PM) 2024 aluminum alloy via the micro-arc oxidation (MAO) technique. The effects of the current density and the oxidation treatment time on the microstructure and properties of the MAO coatings were investigated. The results reveal that the oxide film mainly comprises the γ-Al 2 O 3 phase, the amorphous Al 2 O 3 phase, and a small amount of the mullite phase. There are traces of W in the coatings, which exist in the form of W, WO 3 , and W 18 O 49 . With increasing current density, the thickness and surface roughness of the MAO coatings prepared on the PM 2024 alloy increase, while their surface hardness first increases and then decreases. The increase in the current density promotes the transformation of the amorphous Al 2 O 3 phase into the γ-Al 2 O 3 phase. The maximum hardness value of 1270 HV is obtained at a current density of 20 A dm −2 . The MAO coatings provide superior corrosion protection for the PM 2024 aluminum alloy, and the MAO coatings obtained at a current density of 15 A dm −2 exhibit the highest corrosion resistance.
研究领域:
材料科学
·
表面工程
·
陶瓷涂层
·
腐蚀防护
·
铝合金
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wenshuang Ma,Tao Deng,Lingling Ma,Youbing Li,Tian Xia
Plastic-metal hybrid (PMH) provides a new direction for aerospace and automotive rail transit fields to achieve lightweight. Hot pressing has broad application prospects in plastic/metal hybrids. Before the realization of TC4(Ti-6Al-4V)/PA66(Nylon 66) hybrid by hot pressing, different porous microstructures were prepared on the surface of TC4 by controlling the micro-arc oxidation (MAO) voltage (220 V, 240 V, 260 V, 280 V). Effect of different porous ceramic structures on the hybrid interface. Research shows that the microscopic porous ceramic structure on the surface of TC4 can enhance the surface wettability and wear resistance of TC4. Promote the embedding of PA66 into the TC4 surface to achieve mechanical interlocking. Different microstructures have different effects on bonding strength and failure modes. Especially at 240 V, the interface maximum bonding strength is 11.56 Mpa, and the interface failure mode is a mixed failure caused by plastic cohesion failure and plastic pull-out. In addition, XPS detection generates new chemical bonds, such as Ti-O and -C-Ti-O, at the hybrid interface. Compound reinforcement of mechanical interlocking and chemical bonding is achieved at the interface. In conclusion, these results are crucial for further designing and optimizing plastic-metal hybrids prepared using micro-arc oxidation.
研究领域:
材料科学
·
航空航天工程
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DOI
高影响因子
iScience
·
2024
·
IF 4.6
Marian Chufarov,Yuliya Z. Vassilyeva,Xinyu Zhang,Shilin Li,Alexander Y. Pak,Wei Han
A crucial challenge in hydrogen production through electrolysis is developing inexpensive, earth-abundant, and highly efficient Pt-free electrocatalysts for the hydrogen evolution reaction (HER). Molybdenum carbide is ideal for this application because of its special electrical structure, low cost, and advantageous characteristics. Herein, the long-lived electrocatalysts for HER have been synthesized via the direct current (DC) arc discharge plasma method under ambient air conditions, and the relationship between the properties of materials and catalytic characteristics has been established. The samples differed in the ratio of molybdenum, graphite, and melamine. The sample with the highest proportion of melamine in the initial mixture has Mo2C-MoO2 heterointerfaces, which demonstrates the highest and most stable electrocatalytic activity with the overpotential of 148 mV at 10 mA·cm- 2 and Tafel slope of 63 mV·dec −1 in alkaline electrolyte. Meanwhile, the electrodes demonstrated long-lived electrochemical durability for two weeks and investigated the features of forming a stable system for HER.
研究领域:
材料科学
·
能源化学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）