Aluminum alloy sacrificial anode suitable for sea mud in Bohai Sea Gulf

Abstract

The invention relates to an aluminum alloy sacrificial anode suitable for sea mud in the Bohai Sea Gulf. The aluminum alloy sacrificial anode is compounded from nine elements and comprises the following components in percentage by weight: 2.0-5.5 percent of Zinc, 0.01-0.05 percent of indium, 0.01-0.08 percent of tin, 4-8 percent of magnesium, 0.12-0.32 percent of lanthanum, 0.12-0.32 percent of actinium, 0.03-0.04 percent of cerium, less than or equal to 0.05 percent of silicon serving as an impurity element and the balance of aluminum. Most of added lanthanum, actinium and cerium elements exist in a phase segregation state, are mainly centralized on grain boundaries, are also distributed in crystals, are used for forming binary or polynary compounds such as aluminum-rich rare-earth phases such as LaAl4, CeAl4 and the like, and are used for forming intermetallic compounds with aluminum. The aluminum alloy sacrificial anode is suitable for sacrificial anode protection of the sea mud environment of the Bohai Sea Gulf, and has high adaptability to sea mud with high porosity ratio, large temperature range change and high corrosion, the characteristics of high current efficiency and long service life and the advantages of good protecting effect, long service life, saving in anode materials and the like.

Description

technical field [0001] The invention relates to the technical field of metal anticorrosion, in particular to an aluminum alloy sacrificial anode material, which is suitable for metal sacrificial anode protection in the sea mud environment of Bohai Bay. technical background [0002] Most of the sacrificial anodes used in sea mud are anode series with good performance in seawater. However, due to the dense sea mud, the activation of the sacrificial anode is affected. In addition, the corrosion products of the sacrificial anode adhere to the surface of the anode and are not easy to fall off, which will also lead to a decrease in the efficiency of the anode. Moreover, the composition and characteristics of sea mud in different sea areas are quite different. A sacrificial anode with better performance in sea mud in one sea area may not necessarily have good electrochemical performance in sea mud in another sea area. At present, there are only some studies on sea mud in the South...

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Problems solved by technology

At present, there are only some studies on sea mud in the South China Sea, and there are few studies on sacrificial anode materials suitable for sea mud in Bohai Bay

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