Aluminum alloy corrosion inhibitor for neutral medium

Abstract

The invention belongs to the technical field of corrosion protection for aluminum alloy. The invention relates to an aluminum alloy corrosion inhibitor for a neutral medium. The aluminum alloy corrosion inhibitor for the neutral medium is characterized in that: 1 g of the aluminum alloy corrosion inhibitor comprises 0.1-0.2 mg of zinc sulfate, 0.1-0.2 mg of sodium oleate, 0.1-0.2 mg of sodium orthophosphate and 0.1-0.2 mg of tallow amine. According to the present invention, the corrosion inhibition effect is provided for the aluminum alloy through the synergistic reaction of the zinc sulfate and the sodium oleate; the aluminum alloy corrosion inhibitor formed according to the ratio of the zinc sulfate to the sodium oleate is the aluminum alloy corrosion inhibitor for the neutral medium, wherein the aluminum alloy corrosion inhibitor for the neutral medium is low-toxic, high-efficient and economic, and does not affect the existing technological process.

Description

[0001] [0002] Technical field: the invention belongs to the technical field of anticorrosion of aluminum alloys. [0003] Background technique: [0004] On the earth, aluminum is the third most abundant element, and it has been widely used in various sectors of the national economy. A layer of oxide film can be formed on the surface of aluminum under natural conditions, but this layer of film is very thin and easily damaged, so its corrosion resistance is very poor, resulting in an astonishing corrosion loss caused by various environments every year. In order to improve the corrosion resistance of aluminum alloy materials, so that aluminum alloy materials can be better and more effectively used in various industries, researchers at home and abroad have used various methods to effectively inhibit corrosion. The protection of aluminum alloys has received more and more attention. [0005] The existing aluminum alloy corrosion inhibitors are divided into anodic type, cathodi...

AI Technical Summary

Problems solved by technology

In neutral medium, inorganic substances are generally used as corrosion inhibitors, such as chromate and nitrite, but such corrosion inhibitors are highly toxic and pollute the environment, and will be banned soon

Organic corrosion inhibitors are an important class of organic corrosion inhibitors. Organic corrosion inhibitors improve the pitting corrosion resistance of aluminum alloys in low-concentration solutions, but their use concentrations are limited, that is, when their concentrations are high, they will Causes Alkali Corrosion of Aluminum Alloys

[0006] At this stage, there are many substances that can prevent or slow down the corrosion of metals in the medium to varying degrees, but only those substances that are of real practical value are those that are added in a small amount, are cheap, and can greatly reduce the corrosion rate of metals.

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