Graphite electrode plate, electrolytic corrosion device and method
A graphite electrode and electrolytic corrosion technology, applied in the field of electrolytic corrosion device and graphite electrode plate, can solve the problems to be improved, poor uniformity of tunnel holes, etc.
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Embodiment 1
[0065] (1) Pretreatment: aluminum foil after H 3 PO 4 Pretreatment, H in the pretreatment solution 3 PO 4 The mass fraction is 5.0%, Al 3+ The ion mass fraction is 0.3%, the pretreatment temperature is 65°C, and the pretreatment time is 3min.
[0066] (2) Primary porosity corrosion:
[0067] Structural reference of electrolytic corrosion device Figure 6a , using four sub-electrode superposition structures with different lengths. There are 4 pairs of sub-electrodes, all of which are regular cuboid structures. The lengths are 1500mm, 1000mm, 600mm and 250mm, respectively, the width is 500mm, and the thickness is 20mm. The distance between two adjacent sub-electrodes is 20mm. The back of the longest sub-electrode is provided with a shielding plate 3 made of polypropylene plastic, which is fixed on the corrosion tank body 2 through the hanging lug 7, and the current applied between the aluminum foil 8 and the graphite electrode plate 4 is 4500A. Aluminum foil in HCl, H 2 ...
Embodiment 2
[0072] (1) Pretreatment: aluminum foil after H 3 PO 4 Pretreatment, H in the pretreatment solution 3 PO 4 The mass fraction is 5.0%, Al 3+ The ion mass fraction is 0.3%, the pretreatment temperature is 65°C, and the pretreatment time is 3min.
[0073] (2) Primary porosity corrosion:
[0074] Structural reference of electrolytic corrosion device Figure 7a , adopting five sub-electrode superposition structures with different lengths. There are 4 pairs of sub-electrodes, all of which are regular cuboid structures. The lengths are 1500mm, 1000mm, 600mm, 400mm and 250mm, respectively, the width is 500mm, and the thickness is 20mm. The distance between two adjacent sub-electrodes is 20mm. The back of the longest sub-electrode is provided with a shielding plate 3 made of polypropylene plastic, which is fixed on the corrosion tank body 2 through the hanging lug 7, and the current applied between the aluminum foil 8 and the graphite electrode plate 4 is 4500A. Aluminum foil in ...
Embodiment 3
[0079] (1) Pretreatment: aluminum foil after H 3 PO 4 Pretreatment, H in the pretreatment solution 3 PO 4 The mass fraction is 5.0%, Al 3+ The ion mass fraction is 0.3%, the pretreatment temperature is 65°C, and the pretreatment time is 3min.
[0080] (2) Primary porosity corrosion:
[0081] Structural reference of electrolytic corrosion device Figure 8a , using four sub-electrode superposition structures with different lengths. There are 4 pairs of sub-electrodes, all of which are regular cuboid structures. The lengths are 1500mm, 1000mm, 600mm and 250mm respectively, the width is 500mm, and the thickness is 20mm. The distance between two adjacent sub-electrodes is 0mm. The back of the longest sub-electrode is provided with a shielding plate 3 made of polypropylene plastic, which is fixed on the corrosion tank body 2 through the hanging lug 7, and the current applied between the aluminum foil 8 and the graphite electrode plate 4 is 4500A. Aluminum foil in HCl, H 2 SO...
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