Full
Outline
To address the functional failure of copper and its alloys caused by surface corrosion，a method combining micro-arc oxidation and silicone oil heat treatment is proposed to construct a long-lasting corrosion-resistant and hydrophobic film layer on the surface of copper-zinc alloys. Firstly，through micro-arc oxidation and doping with ZrO₂ particles，a porous microstructure is constructed in-situ on the surface of copper-zinc alloys，and rigid nanoparticles are introduced. Together with micropores，they form the multi-level micro-nano structure required for a hydrophobic surface. Secondly，the oxide film layer is sealed and modified with a dimethyl silicone oil solution. Finally，the silicone-oil-modified oxide film layer samples are heated under a heat-treatment environment to reduce the surface energy of the oxide film layer and achieve hydrophobicity. The surface morphology，chemical composition，and phase composition of the hydrophobic film layer are characterized by scanning electron microscopy （SEM），energy dispersive spectroscopy （EDS），and X-ray diffraction （XRD），respectively. The wettability，corrosion resistance，and durability of the hydrophobic film layer are tested using a contact angle measuring instrument，an electrochemical workstation，and a tape peeling test，respectively. The results show that the main phases on the surface of the hydrophobic film layer are CuO，ZnO，α-Al2O3，γ-Al2O3，ZrO2，and SiO2. Compared with the copper-zinc alloy substrate，the corrosion current density of the hydrophobic film layer is reduced by four orders of magnitude. The water contact angle increases from the original 64.1° to 139.2°，and the surface adhesion energy decreases from 45.331 mJ/m² to 3.554 mJ/m². After 150 tape peeling tests，the contact angle of the prepared hydrophobic film layer surface is still higher than 120°，maintaining good hydrophobicity. This study can provide certain experimental basis and fundamental guidance for the surface corrosion protection of copper and copper alloys.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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