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Vapor phase corrosion inhibitor under high-humidity chlorine-containing environment and preparation method thereof

A gas phase corrosion inhibitor and high humidity technology, applied in the field of metal gas phase rust prevention, can solve the problem of low corrosion inhibition rate of gas phase corrosion inhibitor, and achieve the effects of solving poor corrosion inhibition performance, simple preparation method and improving corrosion inhibition rate

Inactive Publication Date: 2019-02-01
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the deficiencies of the prior art, solve the problem that the current gas-phase corrosion inhibitor has a low corrosion inhibition rate and can only protect a single metal, and provides a gas-phase corrosion inhibitor in a high-humidity chlorine-containing environment and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A gas-phase corrosion inhibitor in a high-humidity chlorine-containing environment, characterized in that the components and mass percentages of the gas-phase corrosion inhibitor are as follows:

[0029] Ammonium molybdate: 3wt%;

[0030] Sodium benzoate: 2wt%;

[0031] Tolyl benzotriazole: 6wt%;

[0032] Ammonium benzoate: 5wt%;

[0033] Flavonoids: 3wt%;

[0034] Organic solvent: 6wt%;

[0035] Sodium nitrite: 20wt%;

[0036] Urea: 15wt%;

[0037] Distilled water: 40wt%.

[0038] A method for preparing a gas-phase corrosion inhibitor in a high-humidity chlorine-containing environment, characterized in that it comprises the following steps:

[0039] Step 1, at first 20wt% sodium nitrite, 15wt% urea and 40wt% distilled water are mixed uniformly, obtain the aqueous solution of sodium nitrite and urea;

[0040] Step 2, adding 3wt% ammonium molybdate, 2wt% sodium benzoate, 6wt% tolyl benzotriazole, 5wt% ammonium benzoate, 3wt% flavonoids, 6wt% organic solvent to th...

Embodiment 2

[0043] A gas-phase corrosion inhibitor in a high-humidity chlorine-containing environment, characterized in that the components and mass percentages of the gas-phase corrosion inhibitor are as follows:

[0044] Ammonium molybdate: 7wt%;

[0045] Sodium benzoate: 5wt%;

[0046] Tolyl benzotriazole: 10wt%;

[0047] Ammonium benzoate: 8wt%;

[0048] Flavonoids: 6wt%;

[0049] Organic solvent: 8wt%;

[0050] Sodium nitrite: 26wt%;

[0051] Urea: 20wt%;

[0052] Distilled water: 10 wt%.

[0053] A method for preparing a gas-phase corrosion inhibitor in a high-humidity chlorine-containing environment, characterized in that it comprises the following steps:

[0054] Step 1, at first 26wt% sodium nitrite, 20wt% urea and 10wt% distilled water are mixed uniformly, obtain the aqueous solution of sodium nitrite and urea;

[0055] Step 2, adding 7wt% ammonium molybdate, 5wt% sodium benzoate, 10wt% tolyl benzotriazole, 8wt% ammonium benzoate, 6wt% flavonoids, 8wt% organic solvent to...

Embodiment 3

[0058] A gas-phase corrosion inhibitor in a high-humidity chlorine-containing environment, characterized in that the components and mass percentages of the gas-phase corrosion inhibitor are as follows:

[0059] Ammonium molybdate: 5wt%;

[0060] Sodium benzoate: 3wt%;

[0061] Tolyl benzotriazole: 8wt%;

[0062] Ammonium benzoate: 6wt%;

[0063] Flavonoids: 5wt%;

[0064] Organic solvent: 7wt%;

[0065] Sodium nitrite: 27wt%;

[0066] Urea: 25wt%;

[0067] Distilled water: 14 wt%.

[0068] A method for preparing a gas-phase corrosion inhibitor in a high-humidity chlorine-containing environment, characterized in that it comprises the following steps:

[0069] Step 1, at first 27wt% sodium nitrite, 25wt% urea and 14wt% distilled water are mixed uniformly, obtain the aqueous solution of sodium nitrite and urea;

[0070] Step 2, adding 5wt% ammonium molybdate, 3wt% sodium benzoate, 8wt% tolyl benzotriazole, 6wt% ammonium benzoate, 5wt% flavonoids, 7wt% organic solvent to t...

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Abstract

The invention relates to a vapor phase corrosion inhibitor under a high-humidity chlorine-containing environment and a preparation method of the vapor phase corrosion inhibitor. The vapor phase corrosion inhibitor comprises the following components of 3-7 wt% of ammonium molybdate, 2-5wt% of sodium benzoate, 6-10wt% of methyl benzotriazole, 5-8wt% of ammonium benzoate, 3-6wt% of flavone, 6-8wt% oforganic solvents, 20-26wt% of natrium nitrosum, 15-20wt% of urea and 10- 40wt% of distilled water. The vapor phase corrosion inhibitor prepared according to the method has the advantages of high efficiency and little environmental pollution, has a good synergistic corrosion inhibition effect and good corrosion inhibition performance for common carbon steel and non-ferrous metals, solves the problem that a current vapor phase corrosion inhibitor is low in corrosion inhibition rate and can only play a protection role for a single metal, is simple to prepare and convenient to use and can improvethe corrosion inhibition rate, and the service life can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of vapor-phase rust prevention for metals, and in particular relates to a gas-phase corrosion inhibitor used in a high-humidity chlorine-containing environment, and also relates to a preparation method of the above-mentioned gas-phase corrosion inhibitor used in a high-humidity chlorine-containing environment. Background technique [0002] Corrosion is an extremely important destructive factor for metal materials, and atmospheric corrosion is the most widespread form of corrosion, and the loss caused by it accounts for more than half of the total corrosion loss. Corrosion inhibitor is a kind of anti-corrosion chemical product, which can reduce the corrosion dissolution rate of technical materials when added in small amounts to corrosive media. Among them, a certain amount of gas-phase corrosion inhibitor is placed in the packaging container or storage space, or gas-phase corrosion inhibitor coated gas-phase ...

Claims

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Application Information

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IPC IPC(8): C23F11/02
CPCC23F11/02
Inventor 董超芳李红梅李瑞雪石瑞霞易盼
Owner UNIV OF SCI & TECH BEIJING
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