| 摘要 |
<p>The method comprises: providing a part (50) made of aluminum alloy containing 0.1-10 wt.% of copper; performing electrochemical pretreatment of the part in a first electrolyte bath (10) containing sulfuric acid and a first oxidizer compound, where a first potential difference is established between a first cathode (11) and a first anode dipped in the first bath, and the concentration of the first oxidizer compound is such that a corrosion potential of the aluminum alloy is greater than +100 mV relative to a hydrogen normal electrode; and anodizing the part in a second electrolyte bath (20). The method comprises: providing a part (50) made of aluminum alloy containing 0.1-10 wt.% of copper; performing electrochemical pretreatment of the part in a first electrolyte bath (10) containing sulfuric acid and a first oxidizer compound, where a first potential difference is established between a first cathode (11) and a first anode dipped in the first bath, the part is the first anode, and the concentration of the first oxidizer compound is such that a corrosion potential of the aluminum alloy is greater than +100 mV relative to a hydrogen normal electrode; and anodizing the part in a second electrolyte bath (20) containing sulfuric acid and a second oxidizer compound, where a second potential difference is established between a second cathode (21) and a second anode dipped in the second bath, and the part is the second anode. The first potential difference is 3-12 V. The anodizing step is performed in the same bath as the first bath of the pretreatment step without extracting the part from the first bath. The method further comprises rinsing the part between the pretreatment step and the anodizing step. The rinsing is constituted by rinsing the part in a static rinsing bath, and then rinsing the part in a running rinsing bath with softened water.</p> |
