Septimal aluminum alloy sacrificial anode material for deep sea environment and preparation method thereof

A sacrificial anode, deep-sea environment technology, used in the field of corrosion and protection of metal materials, can solve the problems of positive potential shift, reduced current efficiency, local corrosion and dissolution, etc., to achieve stable working potential, reduce shrinkage, and promote surface activation.

Inactive Publication Date: 2018-10-26
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the surface seawater sacrificial anode protection technology has matured, and there are standard test methods, but the deep sea sacrificial anode protection test is relatively small, and the relevant research results have shown that: the corrosion behavior of sacrificial anodes in deep sea and Compared with surface seawater, there is a big difference. Conventional anode materials generally have problems such as severe local corrosion and dissolution, greatly reduced current efficiency, and positive potential shifts in deep sea environments.

Method used

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  • Septimal aluminum alloy sacrificial anode material for deep sea environment and preparation method thereof
  • Septimal aluminum alloy sacrificial anode material for deep sea environment and preparation method thereof
  • Septimal aluminum alloy sacrificial anode material for deep sea environment and preparation method thereof

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Embodiment 1

[0026] The seven-element aluminum alloy sacrificial anode material for deep-sea environment contains the following components by mass percentage: 5.81% zinc, 0.028% indium, 0.12% silicon, 0.2% cerium, 0.03% titanium, 0.5% magnesium, and the balance is aluminum, Among them, the impurity iron is <0.1%.

[0027] Preparation of seven-element aluminum alloy sacrificial anode material for deep sea environment: including the following steps:

[0028] (1) Material pretreatment: Accurately weigh 29.34g of zinc ingot, 0.14g of indium ingot, 2.50g of aluminum-silicon alloy, 3.55g of aluminum-cerium alloy, 1.50g of aluminum-titanium alloy, 25.56g of aluminum-magnesium alloy and 437.42g of aluminum ingot with aluminum foil After wrapping, put it in a drying oven, dry it at 200°C for 24 hours, and take it out for later use;

[0029] (2) Preparation of aluminum alloy sacrificial anode material: Melt the aluminum ingot and aluminum-silicon alloy in step (1) in a crucible resistance furnace, ...

Embodiment 2

[0031] The seven-element aluminum alloy sacrificial anode material for deep-sea environment contains the following components by mass percentage: 5.81% zinc, 0.028% indium, 0.12% silicon, 0.2% cerium, 0.05% titanium, 1.0% magnesium, and the balance is aluminum, Among them, the impurity iron is <0.1%.

[0032] The seven-element aluminum alloy sacrificial anode material for deep-sea environment is made of the following raw materials: 29.34g of zinc ingot with a purity of 99.99%, 0.14g of indium ingot with a purity of 99.99%, 2.50g of an aluminum-silicon alloy with an aluminum content of 24.0%, 3.55g of an aluminum-cerium alloy with an aluminum content of 28.19%, 2.50g of an aluminum-titanium alloy with an aluminum content of 10%, 51.12g of an aluminum-magnesium alloy with an aluminum content of 9.78%, and 409.08g of an aluminum ingot.

[0033] The preparation method of the seven-component aluminum alloy sacrificial anode material used in the deep-sea environment in the second em...

Embodiment 3

[0035] The seven-element aluminum alloy sacrificial anode material for deep-sea environment contains the following components by mass percentage: 5.81% zinc, 0.028% indium, 0.12% silicon, 0.2% cerium, 0.07% titanium, 1.5% magnesium, and the balance is aluminum, Among them, the impurity iron is <0.1%.

[0036] The seven-element aluminum alloy sacrificial anode material for deep-sea environment is made of the following raw materials: 29.34g of zinc ingot with a purity of 99.99%, 0.14g of indium ingot with a purity of 99.99%, 2.50g of an aluminum-silicon alloy with an aluminum content of 24.0%, 3.55g of an aluminum-cerium alloy with an aluminum content of 28.19%, 3.50g of an aluminum-titanium alloy with an aluminum content of 10%, 76.69g of an aluminum-magnesium alloy with an aluminum content of 9.78%, and 384.43g of an aluminum ingot.

[0037] The preparation method of the seven-component aluminum alloy sacrificial anode material used in the deep-sea environment in this embodime...

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Abstract

The invention discloses a septimal aluminum alloy sacrificial anode material for a deep sea environment. The aluminum alloy sacrificial anode material is characterized by comprising the following components in percentage by mass: 5-6% of zinc, 0.02-0.08% of indium, 0.05-0.2% of silicon, 0.1-0.6% of cerium, 0.01-0.07% of titanium, 0.5-2.0% of magnesium, the balance aluminum, and impurity iron lessthan 0.1%. The prepared septimal Al-Zn-In-Si-Ce-Ti-Mg sacrificial anode material is more negative in working potential and higher in current efficiency under simulated deep sea environment, and is excellent in activation, uniform in dissolution, and stable in working potential, and corrosion products are easy to remove; and a preparation method is simple, suitable for large-scale industrial production and applicable to cathode material protection of ocean structures under deep sea environment.

Description

technical field [0001] The invention relates to the field of corrosion and protection of metal materials in deep sea environments, in particular to a seven-element aluminum alloy sacrificial anode material for deep sea environments and a preparation method thereof. Background technique [0002] The deep sea area is rich in mineral resources, but deep sea engineering is expensive, maintenance costs are high, and operational risks are high. Therefore, in this environment, corrosion control of materials is very important. The cathodic protection method of sacrificial anode materials is a commonly used corrosion and protection method in the marine environment. In this method, the metal to be protected is connected to the anode material with negative potential to form a current loop, so that the anode material first undergoes oxidation-reduction reaction. , the emitted electrons reach the surface of the protected metal to polarize the potential, causing the anode material to be c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/14C22C21/10C22C1/03
CPCC22C1/026C22C1/03C22C21/10C23F13/14
Inventor 段继周程坤刘欣张杰侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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