Graphene loaded amino-triazole corrosion inhibitor containing chlorobenzaldehyde active group and application thereof

A technology of aminotriazole and active group is applied in the field of rust inhibitor, and achieves the effects of simple preparation method, low comprehensive application cost and good durability

Inactive Publication Date: 2017-12-05
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the focus of research and application of steel corrosion inhibitors is the organic migratory corrosion inhibitor (MCI), which can be used as a concrete additive for new construction, and can also be applied to in-service structures. Deep protection, however, looking at the mushrooming academic reports and market products, there is still no scientific and technological achievement comparable to the protection efficiency of the mixed-type nitrite steel passivator.

Method used

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  • Graphene loaded amino-triazole corrosion inhibitor containing chlorobenzaldehyde active group and application thereof
  • Graphene loaded amino-triazole corrosion inhibitor containing chlorobenzaldehyde active group and application thereof
  • Graphene loaded amino-triazole corrosion inhibitor containing chlorobenzaldehyde active group and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of graphene-supported aminotriazole complexes containing chlorobenzaldehyde active groups.

[0045] Step 1: See figure 1 , synthesize chlorobenzaldehyde-[5-p-methylphenyl-1-amino-(1,3,4-s-triazole)-2-mercapto]-acetylhydrazone, or obtain it by referring to the method described in the prior art; Specifically:

[0046] First, mix p-toluic acid and methanol equimolarly, reflux at 65-70°C for 4 hours, and dehydrate to obtain methyl p-toluate (I); mix the product (I) with excess hydrazine hydrate, and place in an oil bath at 70°C After 4.5h of reaction, p-toluyl hydrazide (II) was obtained.

[0047] Then, the product (II) was reacted with excess carbon disulfide in a KOH alkaline environment at 75°C for 5.5h to generate compound (III); the product (III) was reacted with excess hydrazine hydrate and cyclized at 70°C for 5h to obtain 2 -Mercapto-5-benzyl-[1,3,4]aminotriazole (IV). Product (IV) was reacted with excess ethyl chloroacetate under KOH basic condition...

Embodiment 2

[0053] Obtain the antirust compound of above-mentioned embodiment and measure its antirust efficiency, specifically:

[0054] Conditions: The experimental material is carbon steel (Fe: 99.5%, Mn: 0.4-0.5%, C: 0.1-0.2%), and the effective rust inhibitor is a graphene-loaded aminotriazole compound containing chlorobenzaldehyde active groups The medium is 3.5% sodium chloride solution, the dosage is 100L, the effective content of rust inhibitor compound is 20mg, the temperature is 35°C, pH=11.5, and the immersion time is 60 days.

[0055] The rust-inhibiting efficiencies obtained through experimental tests are 91.1% in weight loss, 92.4% in electrochemical impedance spectroscopy, and 92.9% in dynamic potential polarization curves, indicating that the compound is a rust inhibitor with low dosage and high efficiency.

Embodiment 3

[0057] Conditions: The experimental material is carbon steel (Fe: 99.5%, Mn: 0.4-0.5%, C: 0.1-0.2%), and the effective rust inhibitor is a graphene-loaded aminotriazole compound containing chlorobenzaldehyde active groups The medium is 3.5% sodium chloride solution, the dosage is 100L, the effective content of rust inhibitor compound is 50mg, the temperature is 35°C, pH=11.5, and the immersion time is 60 days.

[0058] The rust-inhibiting efficiencies obtained through experimental tests are 93.7% in weight loss, 95.6% in electrochemical impedance spectroscopy, and 96.3% in dynamic potential polarization curves, indicating that the compound is a rust inhibitor with low dosage and high efficiency.

[0059] Example 3

[0060] Conditions: The experimental material is carbon steel (Fe: 99.5%, Mn: 0.4-0.5%, C: 0.1-0.2%), and the effective rust inhibitor is a graphene-loaded aminotriazole compound containing chlorobenzaldehyde active groups The medium is 3.5% sodium chloride solutio...

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Abstract

The invention relates to corrosion inhibitors, in particular to a graphene loaded amino-triazole corrosion inhibitor containing a chlorobenzaldehyde active group and application thereof. The graphene loaded amino-triazole corrosion inhibitor compound is formed by chemical loading of chlorobenzaldehyde-[5-p-methylphenyl-1-amino-(1,3,4-triazoles)-2-mercapto]-acetyl hydrazones at active sites of oxygen containing functional groups of the graphene molecular layer. The compound is applied to the concrete alkaline environment or the corresponding alkaline condition, and through a cathodic oxygen reduction reaction in the electrochemical process of acting of the graphene molecular layer catalyzed and loaded corrosion inhibitor and carbon steel, a carbon steel material in a seawater or a sodium chloride medium and a steel bar product of the carbon steel material are subjected to corrosion protection. The corrosion inhibitor is wide in source, easy to mass-produce, extremely less in using amount, efficient in performance, high in sustained action capability and capable of effectively inhibiting corrosion destruction of the carbon steel and has significant application value and wide market prospects.

Description

technical field [0001] The invention relates to a rust inhibitor, in particular to a graphene-loaded aminotriazole rust inhibitor containing chlorobenzaldehyde active groups and an application thereof. Background technique [0002] Reinforced concrete is the main material of coastal and offshore engineering construction. Under the marine corrosion environment, the corrosion of steel bars caused by the penetration of high-concentration chloride ions is the primary factor leading to the deterioration of concrete structures. There are many ways to isolate chloride ion corrosion, steel rust inhibitor is the most simple, economical and efficient anti-corrosion technology. [0003] At present, the focus of research and application of steel corrosion inhibitors is the organic migratory corrosion inhibitor (MCI), which can be used as a concrete additive for new construction, and can also be applied to in-service structures. Deep protection, however, looking at the mushrooming acade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/06C07D249/12C04B24/16C04B103/61
CPCC23F11/06C04B24/16C04B2103/61C07D249/12
Inventor 田惠文李伟华侯磊侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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