Polydopamine modified aluminum triphosphate corrosion inhibitor as well as preparation method and application thereof

Abstract

The invention relates to the field of metal corrosion and protection, in particular to a polydopamine modified aluminum triphosphate corrosion inhibitor as well as a preparation method and application thereof. The preparation method of the polydopamine modified aluminum triphosphate corrosion inhibitor comprises the following preparation steps of 1, adding dopamine and tris(hydroxymethyl)aminomethane into a pre-dispersion liquid containing aluminum triphosphate to conduct polymerization reaction; and 2, after the solution of a reaction system in step 1 is black or dark brown, centrifuging the solution of the reaction system to obtain a precipitate, and drying the precipitate to obtain the corrosion inhibitor, wherein the molar ratio of the aluminum triphosphate to the dopamine is (3.5 to 18): (19 to 53). According to the preparation method of the polydopamine modified aluminum triphosphate corrosion inhibitor, the surfaces of aluminum triphosphate filler particles are coated with polydopamine, and the aluminum triphosphate filler particles are attached to a metal substrate through the polydopamine, so that the corrosion inhibition effect is further achieved, and therefore the anti-corrosion effect is more durable.

Description

technical field [0001] The invention relates to the field of metal corrosion and protection, in particular to a polydopamine-modified aluminum tripolyphosphate corrosion inhibitor and a preparation method and application thereof. Background technique [0002] In today's era of continuous growth in engineering demand, steel has become an indispensable metal material in various industries such as aerospace, automotive, machine building, and shipbuilding. However, due to the corrosion of metallic materials, the world suffers huge economic losses every year. According to reports, the direct economic loss caused by metal corrosion in the world is about 700 billion U.S. dollars every year, and the loss caused by metal corrosion in my country accounts for about 5% of the gross national product (GDP). In addition to direct economic losses, corrosion will also cause A series of indirect economic losses such as stoppage of work and production, product degradation, and efficiency reduc...

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Problems solved by technology

[0006] In order to solve the problems of complex preparation components and process and high cost in the corrosion inhibitors with better corrosion inhibition effect in the above-mentioned prior art, the present invention provides a preparation of polydopamine modified aluminum tripolyphosphate corrosion inhibitor The method, wherein, comprises the following preparation steps:

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