Preparing method and application of rust inhibitor

A rust inhibitor and reaction technology, applied in the field of rust inhibitor preparation, can solve the problems of toxic materials, polluted environment, difficult application, etc., and achieve the effects of good appearance and good yield.

Active Publication Date: 2019-08-13
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to diphenylguanidine chromate, it is toxic to materials, pollutes the environment and is harmful to human body
In today's environment where environmental protection requirements are more stringent and people pay more attention to health, it is difficult to have wider application

Method used

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  • Preparing method and application of rust inhibitor
  • Preparing method and application of rust inhibitor
  • Preparing method and application of rust inhibitor

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preparation example Construction

[0020] In order to overcome the defects of the above-mentioned diphenylguanidine chromate existing in the prior art, the main train of thought of the embodiments of the present invention is that a preparation method and application thereof of an antirust agent comprise the steps:

[0021] The phosphomolybdic acid solid is dissolved in water to obtain a phosphomolybdic acid solution, and the diphenylguanidine solid is slowly dissolved in water to obtain a diphenylguanidine slurry;

[0022] Under the stirring state, slowly add diphenylguanidine slurry into the dissolved phosphomolybdic acid solution for reaction. The reaction temperature is 20-50°C. As the reaction progresses, the color of the precipitate produced gradually changes from orange to yellow, and the particles When the product becomes thinner and reaches the end of the reaction, the obtained product is suction-filtered, and the filter cake is dried at 70-75°C to obtain the pure product.

[0023] Among them, the synth...

Embodiment

[0028] Dissolve 5.00g (2.71mmol) of phosphomolybdic acid in 20ml of distilled water, slowly dissolve 1.77g (8.37mmol) of diphenylguanidine in 10ml of distilled water, and slowly add diphenylguanidine slurry under high-speed stirring for reaction. The color of the resulting precipitate gradually changed from orange to yellow, and the particles became finer. When the end point of the reaction is reached, the product is filtered with a suction filter, and the filter cake is dried in an infrared dryer at 70-75°C to obtain the product.

[0029] The reaction formula is as follows:

[0030]

[0031] Next, set different temperatures, different reaction times in different embodiments and carry out experiment, obtain the product of different yields. The specific parameters are shown in Table 1 below.

[0032] Table 1

[0033]

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Abstract

The invention provides a preparing method and application of a rust inhibitor. The preparing method comprises the following steps of adding water to dissolve a phosphomolybdic acid solid and obtain aphosphomolybdic acid solution, and slowly dissolving a diphenylguanidine solid into water to obtain diphenylguanidine slurry; in a stirring state, slowly adding the diphenylguanidine slurry in the phosphomolybdic acid solution obtained after dissolving for a reaction at the reaction temperature of 20-50 DEG C, wherein as the reaction goes on, a produced precipitate gradually turns to yellow from orange, and particles get smaller; when the reaction destination is reached, conducting suction filtration on an obtained product, drying a filter cake at 70-75 DEG C, and conducting smashing to obtainthe product. According to the preparing method, phosphomolybdic acid is utilized for replacing chromic acid to react with diphenylguanidine to generate diphenylguanidine phosphomolybdate, and the rust inhibition performance of the diphenylguanidine phosphomolybdate is tested; it is founded that the rust inhibition effect of the diphenylguanidine phosphomolybdate is similar to that of diphenylguanidine chromate, and it is hopeful that the diphenylguanidine phosphomolybdate can gradually replace the diphenylguanidine chromate and become a new generation of rust inhibitors.

Description

technical field [0001] The invention relates to the field of anti-corrosion technology; in particular, it relates to a preparation method and application of an anti-rust agent. Background technique [0002] Corrosion refers to the process in which metals undergo electrochemical reactions to form metal oxides. Corrosion can seriously damage products, so anti-rust treatment has great research significance. Antirust agents are divided into oil-based antirust agents and water-based antirust agents. The environment-friendly water-based antirust agent has outstanding advantages, such as: flame retardant, low toxicity, and environmental protection. It is an environmentally friendly product. Brushing on the surface of steel can form a continuous and dense protective layer to isolate the environment from the air. Oxygen and water contact with the steel surface to achieve the purpose of rust prevention. [0003] Anti-rust pigments can be divided into two categories according to thei...

Claims

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Application Information

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IPC IPC(8): C09D5/08C07F11/00
CPCC07F11/005C09D5/08
Inventor 祁小云朱国胜
Owner HUBEI UNIV
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