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

A sacrificial anode and aluminum alloy technology, which is applied in the field of aluminum alloy sacrificial anode materials for storage tank coils and their preparation, can solve the problems of large capacitance, easy passivation, failure, etc., and achieves fine grains and difficult passivation. , The effect of dense and uniform organization

Active Publication Date: 2015-10-21
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to overcome the above-mentioned problems existing in the anti-corrosion of storage tank heating coils in the prior art, and provide an aluminum alloy sacrificial anode material for storage tank coils and a preparation method thereof. The present invention has large capacitance, large driving potential, and The current efficiency is high and can be dissolved evenly, which effectively solves the defects of the national standard Al-Zn-In series anode material in the high-temperature, high-salinity corrosion environment, which is easy to passivate and fail, so that it can effectively reduce the coil protection potential to -0.85 Below V, prolong the service life of the heating coil

Method used

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

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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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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F13/14C22C21/10C22C1/02
Inventor 郭亮吴保玉李世勇张新发陈怀兵徐军薛斌
Owner BC P INC CHINA NAT PETROLEUM CORP
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