激光表面活化对6061铝合金V/ zr基转化涂层形成及腐蚀性能的影响

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-04-29 DOI:10.1016/j.mseb.2025.118371

Jianzhong Li , Mingshi Li , Zhichun Cui , Peidong Li

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引用次数: 0

摘要

研究了激光表面活化（LSA）参数对铝合金（AA） 6061铝合金钒/锆基转化涂层（V/ZrCC）形成及耐蚀性的影响。在能量密度为7.5、10.0和12.5 J/cm2 （100 kHz脉冲频率，100 mm/s扫描速度）下进行LSA处理，然后在含有H2ZrF6、NaVO3、NaNO3和NaF （pH 4, 35°C, 3 min）的转化浴中沉积V/ZrCC。通过扫描电子显微镜（SEM）、x射线衍射仪（XRD）、x射线光电子能谱（XPS）、塔菲尔极化（Tafel polarization）和交流阻抗（EIS）分析了材料的表面形貌、组成和电化学性能。结果表明，LSA促进了二次氧化，形成了富含缺陷的氧化膜（Al2O3、MgO、MgAl2O4），并产生了残余拉伸应力（43.9 ~ 72.2 MPa），提高了衬底的电化学活性。在10.0 J/cm2时，V/ZrCC达到最佳厚度，微裂纹最小，具有优异的耐腐蚀性。更高的能量密度（12.5 J/cm2）会加速涂层的生长，但会产生广泛的裂纹，降低性能。

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Effect of laser surface activation on the formation and corrosion properties of V/Zr-Based conversion coating on 6061 aluminum alloy

This study investigates the effect of laser surface activation (LSA) parameters on the formation and corrosion resistance of Vanadium/Zirconium-based Conversion Coatings (V/ZrCC) on Aluminum Alloy (AA) 6061 aluminum alloy. LSA treatments were conducted at energy densities of 7.5, 10.0, and 12.5 J/cm² (100 kHz pulse frequency, 100 mm/s scanning speed), followed by V/ZrCC deposition in a conversion bath containing H₂ZrF₆, NaVO₃, NaNO₃, and NaF (pH 4, 35 °C, 3 min). Surface morphology, composition, and electrochemical properties were analyzed via scanning electron microscopy (SEM), X-ray diffractometry (XRD), and X-ray photoelectron spectroscopy (XPS), Tafel polarization, and Ac impedance (EIS). Results reveal that LSA promotes secondary oxidation, forming defect-rich oxide films (Al₂O₃, MgO, MgAl₂O₄) and inducing residual tensile stress (43.9–72.2 MPa), which enhances substrate electrochemical activity. At 10.0 J/cm², the V/ZrCC achieves optimal thickness with minimal microcracks, yielding superior corrosion resistance. Higher energy density (12.5 J/cm²) accelerates coating growth but introduces extensive cracks, degrading performance.

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.