Aluminum alloy sacrificial anode material for storage tank coil and preparation method thereof

Abstract

The invention discloses an aluminum alloy sacrificial anode material for a tank storage coiled tube and a preparation method of the aluminum alloy sacrificial anode material. The aluminum alloy sacrificial anode material for the tank storage coiled tube comprises the following components in percentage by weight: 3.0%-5.5% of Zn, 0.02%-0.03% of In, 1.0%-1.5% of Mg, 0.03%-0.05% of Ti, 0.01%-0.09% of B, the balance of aluminum, wherein the content of impurities is not more than 0.1%. The aluminum alloy sacrificial anode material is large in electric capacity, large in driving potential, high in current efficiency and can be uniformly dissolved, so that the defects that national-standard Al-Zn-In anode system is easy to passivate and lose effectiveness in a field high-temperature environment and high-mineralization corrosion environment are effectively solved, thereby effectively reducing the protective potential of the coiled tube to be lower than -0.85V and prolonging the service life of the heating coiled tube.

Description

technical field

[0001] The invention relates to the technical field of oil field corrosion and protection, and mainly relates to an aluminum alloy sacrificial anode material for storage tank coils and a preparation method thereof, which are used to solve the problem of corrosion and perforation of storage tank heating coils caused by corrosion. Background technique

[0002] The heating coil is one of the important accessories in the crude oil storage tank. Its function is to heat the oil-water mixture in the storage tank in winter to ensure that the temperature of the crude oil in the tank is above the freezing point, prevent the solidification of the crude oil in the storage tank and accelerate the separation of oil and water. The crude oil entering the storage tank has a high water content (water content ≥ 50%), and the heating coil is generally installed at the bottom of the storage tank. Therefore, the external corrosion environment is mainly deposited water at the bottom...

Examples

Embodiment 1

[0024] The weight percentage composition of the aluminum alloy sacrificial anode material for storage tank coils in this embodiment is: Zn: 5.5%; In: 0.02%; Mg: 1.5%; Ti: 0.05%; B: 0.03%, and the balance is aluminum, Impurity content ≤ 0.1%.

[0025] According to the recipe, weigh various alloying elements and wrap them tightly with aluminum foil. The temperature is set at 760°C, and the aluminum ingot is heated together with the furnace until it is completely melted. According to the melting point of each alloy element, it is pressed into the molten aluminum water at different temperatures. After several times of stirring, it is left in the furnace for 10 minutes. Then stir gently to mix evenly, cast in cast iron molds, and let it cool and solidify naturally.

Embodiment 2

[0027] The weight percentage composition of the aluminum alloy sacrificial anode material for storage tank coils in this embodiment is: Zn: 3.5%; In: 0.03%; Mg: 1.0%; Ti: 0.05%; B: 0.015%, and the balance is aluminum, Impurity content ≤ 0.1%.

[0028] According to the recipe, weigh various alloying elements and wrap them tightly with aluminum foil. The temperature is set at 760°C, and the aluminum ingot is heated together with the furnace until it is completely melted. According to the melting point of each alloy element, it is pressed into the molten aluminum water at different temperatures. After several times of stirring, it is left in the furnace for 10 minutes. Then stir gently to mix evenly, cast in cast iron molds, and let it cool and solidify naturally.

Embodiment 3

[0030] The weight percentage formula of the aluminum alloy sacrificial anode material for storage tank coils in this embodiment is: Zn: 5.0%; In: 0.03%; Mg: 1.5%; Ti: 0.05%; B: 0.05%, the balance is aluminum, Impurity content ≤ 0.1%.

[0031] According to the alloy formula, weigh various alloy elements and wrap them tightly with aluminum foil. The temperature is set at 760°C, and the aluminum ingot is heated together with the furnace until it is completely melted. According to the melting point of each alloy element, it is pressed into the molten aluminum water at different temperatures. After several times of stirring, it is left in the furnace for 10 minutes. Then stir gently to mix evenly, cast in cast iron molds, and let it cool and solidify naturally.

technical field

[0001] The invention relates to the technical field of oil field corrosion and protection, and mainly relates to an aluminum alloy sacrificial anode material for storage tank coils and a preparation method thereof, which are used to solve the problem of corrosion and perforation of storage tank heating coils caused by corrosion. Background technique

[0002] The heating coil is one of the important accessories in the crude oil storage tank. Its function is to heat the oil-water mixture in the storage tank in winter to ensure that the temperature of the crude oil in the tank is above the freezing point, prevent the solidification of the crude oil in the storage tank and accelerate the separation of oil and water. The crude oil entering the storage tank has a high water content (water content ≥ 50%), and the heating coil is generally installed at the bottom of the storage tank. Therefore, the external corrosion environment is mainly deposited water at the bottom...

Examples

Embodiment 1

[0024] The weight percentage composition of the aluminum alloy sacrificial anode material for storage tank coils in this embodiment is: Zn: 5.5%; In: 0.02%; Mg: 1.5%; Ti: 0.05%; B: 0.03%, and the balance is aluminum, Impurity content ≤ 0.1%.

[0025] According to the recipe, weigh various alloying elements and wrap them tightly with aluminum foil. The temperature is set at 760°C, and the aluminum ingot is heated together with the furnace until it is completely melted. According to the melting point of each alloy element, it is pressed into the molten aluminum water at different temperatures. After several times of stirring, it is left in the furnace for 10 minutes. Then stir gently to mix evenly, cast in cast iron molds, and let it cool and solidify naturally.

Embodiment 2

[0027] The weight percentage composition of the aluminum alloy sacrificial anode material for storage tank coils in this embodiment is: Zn: 3.5%; In: 0.03%; Mg: 1.0%; Ti: 0.05%; B: 0.015%, and the balance is aluminum, Impurity content ≤ 0.1%.

[0028] According to the recipe, weigh various alloying elements and wrap them tightly with aluminum foil. The temperature is set at 760°C, and the aluminum ingot is heated together with the furnace until it is completely melted. According to the melting point of each alloy element, it is pressed into the molten aluminum water at different temperatures. After several times of stirring, it is left in the furnace for 10 minutes. Then stir gently to mix evenly, cast in cast iron molds, and let it cool and solidify naturally.

Embodiment 3

[0030] The weight percentage formula of the aluminum alloy sacrificial anode material for storage tank coils in this embodiment is: Zn: 5.0%; In: 0.03%; Mg: 1.5%; Ti: 0.05%; B: 0.05%, the balance is aluminum, Impurity content ≤ 0.1%.

[0031] According to the alloy formula, weigh various alloy elements and wrap them tightly with aluminum foil. The temperature is set at 760°C, and the aluminum ingot is heated together with the furnace until it is completely melted. According to the melting point of each alloy element, it is pressed into the molten aluminum water at different temperatures. After several times of stirring, it is left in the furnace for 10 minutes. Then stir gently to mix evenly, cast in cast iron molds, and let it cool and solidify naturally.

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