JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xiuzhou Lin,Long He,Lan Luo,Qiaoling Yang,Baojie Dou,Xinmiao Jiang,Yan Wang,Xinyue Liang
Hollow Co x Fe 3-x O 4 nanocontainers were loaded with SDBS and sealed by KH-560. • Nanocontainers participated in MAO growth and regulated discharge defects. • The specific wear rate of MAO-1 decreased by 95.8% compared with MAO-0. • MAO-1 showed the best corrosion resistance with superior electrochemical properties. • SVET confirmed corrosion-responsive inhibitor release and self-healing protection. The intrinsic porosity and microcracks inherent to micro-arc oxidation (MAO) coatings create preferential diffusion paths for corrosive species, thereby limiting the long-term corrosion protection of magnesium alloys. In this work, hollow mesoporous Co x Fe 3-x O 4 nanocontainers were synthesized via a cetyltrimethylammonium bromide (CTAB) assisted solvothermal method, loaded with sodium dodecylbenzenesulfonate (SDBS) as a corrosion inhibitor, sealed with KH-560 silane coupling agent, and subsequently incorporated into MAO coatings on AZ31B magnesium alloy. The nanocontainers participated in coating formation through pore filling and co-solidification with molten oxides. Moderate addition refined discharge pores and improved coating integrity, whereas excessive addition caused particle agglomeration and inhomogeneity. At the optimal concentration of 1 g·L -1 , MAO-1 exhibited the greatest coating thickness (37.96 μm). MAO-1 exhibited the highest coating resistance ( R c = 2.40×10 7 Ω·cm 2 ) and charge-transfer resistance ( R ct =1.77×10 6 Ω·cm 2 ), together with the lowest corrosion current density (2.85×10 -9 A·cm -2 ). Its specific wear rate was reduced to 2.56×10 −6 mm 3 ·N -1 ·m -1 , which is 95.8% lower than that of MAO-0. Scanning vibrating electrode technique (SVET) measurements further confirmed corrosion-responsive self-healing behavior in MAO-1: after 12 h of immersion, the maximum local potential-difference signal decreased from 0.0105 to 0.0042 mV, representing a 66.1% reduction compared to MAO-0. The progressive attenuation of local electrochemical activity indicates that the release, migration, and interfacial adsorption of SDBS effectively suppress localized anodic dissolution and partially restore protection at damaged regions. Overall, the Co x Fe 3-x O 4 @SDBS@KH-560 nanocontainers synergistically combine barrier reinforcement with inhibitor-mediated active protection, thereby enhancing the corrosion resistance, wear resistance, and self-healing capability of the MAO coating.
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DOI
高影响因子
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
·
2023
·
IF 1.8
Yingxue Liu,Huijie Huangfu,Shuai Gao,Xugeng Guo,Li Wang
Herein, we prepare two types of MgAl-LDHs coatings single-doped by imidazolium ionic liquid 1-decyl-3-methylimidazolium bromide ([Demim]Br) or sodium dodecylbenzenesulphonate (SDBS) and double-doped by [Demim]Br and SDBS on AZ31B Mg alloy by using an in-situ hydrothermal treatment. Their surface morphology and corrosion resistance immersed in 3.5 wt-% NaCl solution are explored. Our results suggest that the double doping of [Demim]Br and SDBS will change the surface morphology of the coating and a uniform and dense film is observed in the double-doped MgAl-LDHs, which is denser than those of the two single-doped MgAl-LDHs coatings, thus providing a superior corrosion resistance. Such an improvement can be ascribed to the synergetic inhibition effect of [Demim]Br and SDBS against the corrosion of the Mg alloy substrate. More importantly, the charge transfer resistance of the sample coated with the double-doped MgAl-LDHs is still high after 3 d of immersion, benefiting from the excellent self-healing effect.
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DOI
高影响因子
MATERIALS & DESIGN
·
2024
·
IF 7.6
Chao Yang,Chenyu Wang,Xuanzi Zhao,Zhao Shen,Min Wen,ChaoChao Zhao,Liyuan Sheng,Yaoguang Wang,Daokui Xu,Yufeng Zheng,Paul K. Chu,Xiaoqin Zeng
Corrosion caused by the active chemical properties of magnesium (Mg) alloys seriously restricts their applications in aerospace, transportation, biomedicine, and other fields. Although micro-arc oxidation (MAO) coatings can provide some corrosion protection for Mg alloys, their microporous structure is prone to localized corrosion. Herein, nanoflower-shaped zinc phosphate is prepared and hydrophobically modified. The commercial glue is used to bond the nanoflower-shaped zinc phosphate particle arrays to the MAO-coated AZ31B alloy substrate to produce a two-layer composite coating with superhydrophobic properties. The composite coating exhibits obvious repulsive effects in salt and acidic solutions as indicated by contact angles of 160° and 156°, respectively. The composite coating has improved electrochemical properties and immersion corrosion in both the salt and acidic solutions compared to the substrate and MAO-coated sample. Moreover, the composite coating retains the long-term superhydrophobic effects under different conditions such as immersion in salt and acidic solutions, water scouring, and sunlight exposure, which well indicates commercial applications.
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产品关联
DOI
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.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Xiang Liu,Huaqiang He,Tian C. Zhang,Like Ouyang,Yu-Xin Zhang,Shaojun Yuan
In this work, clinochrysotile-like magnesium silicate nanotubes (MS-TNs) were fabricated by a hydrothermal method and then modified with dodecyltrimethoxysilane (DTMS) for the first time to act as a superhydrophobic material (MS-TNs/DTMS), whilst the MS-TNs was used as a nanocontainer to load a corrosion inhibitor 2-mercaptabenzimidazole (2-MBI). Taking the advantage of epoxy resin as a coating matrix, the AZ31B Mg alloy substrate was coated successfully by MS-TNs(2-MBI) as the first layer (for self-healing anti-corrosion) and superhydrophobic MS-TNs/DTMS as the second layer (for superhydrophobicity and anti-corrosion). The wettability, functionality and physicochemical stability of the superhydrophobic surface as well as the anti-corrosion performances of the dual-function coatings were systematically investigated by characterization, testing and electrochemical measurements. The as-prepared dual function coating with water contact angle at about 155° and sliding angle at circa 5° not only showed robust mechanical stability and chemical durability, but also exhibited substantial improvement of anti-corrosion property for protection of AZ31B Mg in a long run. The corrosion current density decreased from 8.33 × 10 −4 A·cm −2 of bare Mg to 8.12 × 10 −8 A·cm −2 of the coated sample. Furthermore, MS-TNs/DTMS was applicable to various kinds of substrates (e.g., copper mesh, sponge, glass slide, cloth, A4 typing paper) and showed an excellent water repellency, demonstrating its potential usage in fabrication of superhydrophobic surface as a low-cost and environmentally-benign material.
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产品关联
DOI
高影响因子
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
·
2023
·
IF 0.7
Zhongli Zou,Kun Liu,Yang Li
AZ31B has the advantages of high specific strength, low melting point and good toughness, but one of the significant disadvantages is poor corrosion resistance. This topic designed and prepared a corrosion-resistant composite coating of organic polymer phytic acid and rare earth praseodymium salt based on this characteristic. The test results show that the corrosion resistance of the PA/Pr composite coating is more potent than that of a single phytic acid conversion coating, and the surface of the composite layer is clustered particles with good compactness. The conversion coating mainly consists of praseodymium hydroxide, oxide and some phytate compounds. In addition, density functional theory (DFT) was used to analyze the inhibition mechanism of phytic acid; Molecular dynamics (MD) was used to evaluate the adsorption characteristics of phytic acid on metal substrates and rare earth metal oxides.
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DOI
高影响因子
危险品化学品经营许可证（带存储）