Aluminum alloy sacrificial anode suitable for abyssal environment
A sacrificial anode and deep-sea environment technology, which is applied in the field of corrosion protection of metal materials in the marine environment, can solve the problems of current efficiency drop, unstable working potential, uneven dissolution, etc., and achieve electrochemical performance improvement, good activation performance, and dissolution homogeneous effect
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Embodiment 1
[0011] with A 00 Aluminum is the main raw material, and the percentages by weight of various trace elements are: 2% (wt) of zinc, 0.03% of indium, 2% of magnesium, 0.20% of titanium, 0.55% of gallium, and 1.20% of manganese. The total amount of impurities is ≦0.30% (wt), among which, other impurities are iron+copper+nickel≦0.15% (wt), silicon+calcium≦0.15% (wt), and the balance is aluminum. Manufactured by casting process: first put the aluminum ingot into the aluminum melting furnace to melt, add zinc, indium, magnesium, titanium, gallium, manganese and other materials when all the aluminum ingots are about to be melted, stir with a graphite rod or a stirring device, and then remove the aluminum liquid Impurities such as oxidized slag on the surface can be cast out of the furnace, and the casting process must be continuous until the molten aluminum is completely cooled and solidified. Referring to GB / T 17859-1999 Sacrificial Anode Electrochemical Performance Test Standard, t...
Embodiment 2
[0013] with A 00 Aluminum is the main raw material, and the percentages by weight of various trace elements are: 4% (wt) of zinc, 0.05% of indium, 1.5% of magnesium, 0.10% of titanium, 0.30% of gallium, and 0.02% of manganese. The total amount of impurities is ≦0.30% (wt), among which, other impurities are iron+copper+nickel≦0.15% (wt), silicon+calcium≦0.15% (wt), and the balance is aluminum. The product of the present invention is obtained by smelting. Referring to GB / T 17859-1999 Sacrificial Anode Electrochemical Performance Test Standard, the test results in seawater with 4 ℃ and 4 ppm dissolved oxygen are: the open circuit potential is -1.093~-1.095V (vs.Ag / AgCl reference electrode, lower The same), the working potential is -1.062~-1.072V, the current efficiency is 93%, the dissolution is uniform, and the corrosion product falls off; the sacrificial anode is processed into a columnar shape of Φ13×40mm, and it is tested at a depth of 800 meters in the South China Sea deep-...
Embodiment 3
[0015] with A 00 Aluminum is the main raw material, and the percentages by weight of various trace elements are: 5.5% (wt) of zinc, 0.08% of indium, 0.5% of magnesium, 0.05% of titanium, 0.05% of gallium, and 0.50% of manganese. The total amount of impurities is ≦0.30% (wt), among which, other impurities are iron+copper+nickel≦0.15% (wt), silicon+calcium≦0.15% (wt), and the balance is aluminum. The product of the present invention is obtained by smelting. Referring to GB / T 17859-1999 Sacrificial Anode Electrochemical Performance Test Standard, the test results in seawater with 4°C and 4ppm dissolved oxygen are: open circuit potential is -1.102~-1.113V (vs. Ag / AgCl reference electrode, lower The same), the working potential is -1.095~-1.106V, the current efficiency is 92.4%, the dissolution is uniform, and the corrosion products fall off; the sacrificial anode is processed into a columnar shape of Φ13×40mm, and it is tested at a depth of 800 meters in the South China Sea Deep ...
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