Environment-friendly efficient corrosion inhibitor as well as preparation method and application of environment-friendly efficient corrosion inhibitor

A corrosion inhibitor and high-efficiency technology, applied in the field of environmental protection and high-efficiency corrosion inhibitor and its preparation, can solve the problems of high cost, carcinogenicity, poor water solubility, etc., and achieve the effect of low cost and safe use

Inactive Publication Date: 2014-03-26
SOUTHWEST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Satisfactory inorganic salt corrosion inhibitors were developed before the 1980s: chromate, nitrite, mercury salt, arsenic compound, but because these inorganic salts can cause cancer and pollute the environment, their application is limited
However, the cost of th

Method used

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  • Environment-friendly efficient corrosion inhibitor as well as preparation method and application of environment-friendly efficient corrosion inhibitor
  • Environment-friendly efficient corrosion inhibitor as well as preparation method and application of environment-friendly efficient corrosion inhibitor
  • Environment-friendly efficient corrosion inhibitor as well as preparation method and application of environment-friendly efficient corrosion inhibitor

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preparation example Construction

[0018] The preparation method of the environment-friendly high-efficiency corrosion inhibitor of the present invention includes raw material preparation and preparation steps, specifically including:

[0019] A, raw material preparation: prepare bamboo leaf extract for subsequent use, prepare pickling solution, allylthiourea, Tween, quaternary ammonium salt, sodium iodide for subsequent use;

[0020] B. Preparation: Add bamboo leaf extract, allylthiourea, Tween, quaternary ammonium salt, and sodium iodide into the pickling solution according to the ratio of raw materials, stir and mix evenly to obtain the target product.

[0021] Described preparation bamboo leaf extract comprises the following steps:

[0022] A. Pre-treatment: After the bamboo leaves are collected, remove the surface impurities, rinse with water to remove the dust on the leaf surface, drain the surface water, air-dry them, put them in a blast oven, dry them at a constant temperature of 50-70°C for 36-60 hours...

Embodiment 1

[0037] Embodiment 1——Preparation of Bamboo Leaf Extract

[0038] The bamboo leaf corrosion inhibitor is prepared by extracting golden bamboo leaves, wherein:

[0039] a. After the bamboo leaves are collected, remove the surface impurities, rinse with water to remove the dust on the leaf surface, drain a large amount of water, air-dry them, put them in a blast oven, dry them at 70oC for two days and nights, take them out and cool them down to room temperature, and then crush them. The particle size is about 350 μm;

[0040]b. Take a certain amount of bamboo leaf powder, add a certain volume of ethanol solution (volume fraction: 20% - 80%) (solid-liquid ratio: 1:25), soak at room temperature for 2 hours, and then reflux extraction in a water bath at 80oC for 1.5 hours;

[0041] c. Vacuum filter the refluxed ethanol extract to remove the bamboo leaf powder contained therein, and then rotate the solution at 70°C on a rotary evaporator;

[0042] d Transfer the liquid concentrate...

Embodiment 2

[0044] Embodiment 2——Preparation of Bamboo Leaf Extract

[0045] The bamboo leaf extract is prepared from purple bamboo leaves, wherein:

[0046] a. After the bamboo leaves are collected, remove the surface impurities, rinse with water to remove the dust on the leaf surface, drain a large amount of water and air-dry them, then put them in a blast oven, dry them at a constant temperature of 80oC for two days and nights, take them out and cool them naturally to room temperature, and then pulverize them. The particle size is about 350 μm;

[0047] b. Take a certain amount of bamboo leaf powder, add a certain volume of ethanol solution (volume fraction: 20% - 80%) (solid-liquid ratio: 1:25), soak at room temperature for 1 hour, and then reflux extraction in a water bath at 60°C for 2 hours ;

[0048] c. Vacuum filter the refluxed ethanol extract to remove the bamboo leaf powder contained therein, and then rotate the solution at 70°C on a rotary evaporator;

[0049] d. Transfer ...

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Abstract

The invention discloses an environment-friendly efficient corrosion inhibitor as well as a preparation method and application of the environment-friendly efficient corrosion inhibitor. The environment-friendly efficient corrosion inhibitor comprises 0.1 to 2g/L of bamboo leaf extracts, 0.05 to 0.1 g/L of allylthiourea, 0.01 to 0.05g/L of Tween, 0.1 to 0.2g/L of hyamine, 0.01 to 0.05g/L of sodium iodide and the balance of pickling solution. The method comprises the steps of raw material preparation and proportioning, and the application of the environment-friendly efficient corrosion inhibitor refers to the application to steel, aluminum and petrochemical industry equipment preparation, filtering and pipeline cleaning agents. On the basis of the bamboo leaf extracts and the allylthiourea, surfactants of the Tween and the hyamine, an auxiliary agents of the sodium iodide and the balance of pickling solution are added for preparation, and the obtained acid pickling corrosion inhibitor has a synergistic interaction effect. The environment-friendly efficient corrosion inhibitor has the advantages that no toxicity exists, the cost is low, the adaptability is high, in addition, the corrosion effect of acid on metal materials is obviously inhibited, the environment-friendly efficient corrosion inhibitor is suitable for the acid pickling of steel and aluminum in inorganic acid and organic acid and can be applied to the cleaning of petrochemical industry equipment, boilers and pipelines, after the environment-friendly efficient corrosion inhibitor is used, no pollution is caused, and the use is safe and convenient.

Description

technical field [0001] The invention belongs to the technical field of metal corrosion inhibitors, and in particular relates to an environment-friendly and high-efficiency corrosion inhibitor and its preparation method and application. Background technique [0002] Metal materials occupy a very important position in modern industry and agriculture, machinery, transportation, national defense and science and technology. Steel has the advantages of low price, good machining performance, and large output. It is the first metal to be considered in the process of material selection and use, and it is also one of the most widely used metals at present. However, metal materials are extremely prone to corrosion, and the damage is very serious. It is estimated that the amount of iron and steel scrapped due to corrosion is equivalent to 1 / 4 - 1 / 3 of the annual output in the world every year; the annual loss caused by corrosion accounts for 3.1% - 4.5% of the gross national product (G...

Claims

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Application Information

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IPC IPC(8): C23G1/06
Inventor 李向红邓书端付惠刘祥义
Owner SOUTHWEST FORESTRY UNIVERSITY
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