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Method for optimizing corrosion inhibition efficiency of corrosion inhibitors in carrier

A corrosion inhibitor and carrier technology, which is applied in the field of optimizing the corrosion inhibition efficiency of corrosion inhibitors in carriers, can solve unfavorable loading corrosion inhibitor carrier technology development and application of self-healing coating technology, and the carrier cannot exert the effect of corrosion inhibitors to antagonize Effect and other issues, to achieve the effect of optimizing corrosion inhibition efficiency, improving corrosion inhibition performance, and broad application prospects

Active Publication Date: 2021-12-10
UNIV OF SCI & TECH BEIJING
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  • Description
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Problems solved by technology

[0003]However, at present, the amount and ratio of compound corrosion inhibitors added to micro-nano carriers are often not regulated and optimized, which often makes the carrier unable to play the best corrosion inhibitor. Corrosion effect, or even antagonism, is not conducive to the development of carrier technology for loading corrosion inhibitors and the development and application of self-healing coating technology

Method used

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  • Method for optimizing corrosion inhibition efficiency of corrosion inhibitors in carrier
  • Method for optimizing corrosion inhibition efficiency of corrosion inhibitors in carrier
  • Method for optimizing corrosion inhibition efficiency of corrosion inhibitors in carrier

Examples

Experimental program
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Effect test

Embodiment 1

[0040] (1) Two different corrosion inhibitors: benzotriazole (BTA) and cerium nitrate (Ce(NO 3 ) 3 ) according to the total concentration of 0.2g / L, respectively dissolved in 3.5wt% NaCl solution in the mass ratio of 0:4, 1:3, 2:2, 3:1, 4:0.

[0041] (2) Soak the Q235 carbon steel sample in the above NaCl solution, take it out after an interval of 1h, and observe the surface morphology of the Q235 carbon steel sample.

[0042] figure 1 For example 1 with BTA and Ce (NO 3 ) 3 In order to compound the corrosion inhibitor system, different proportions of corrosion inhibitors were dissolved in 3.5wt.% NaCl solution, and the metal sample was selected as Q235 carbon steel sample, and the corrosion product morphology on the surface of Q235 carbon steel sample . This example shows that when benzotriazole (BTA) and cerium nitrate (Ce(NO 3 ) 3 ) when the ratio of the corrosion inhibitor is 2:2, the corrosion products produced on the surface of the Q235 carbon steel sample are the...

Embodiment 2

[0044] (1) Put two different corrosion inhibitors: benzotriazole (BTA) and 2-mercaptobenzothiazole (2-MBT) according to the total concentration of 0.6g / L, 6:0, 5:1, 4: The mass ratio of 2 is dissolved in 3.5wt% NaCl solution.

[0045] (2) Soak the AA2024 aluminum alloy in the 3.5wt% NaCl solution containing the corrosion inhibitor, use the electrochemical impedance spectroscopy of the three-electrode measurement system, and compare the impedance modulus to determine the quality of the synergistic effect of the corrosion inhibitor. The ratio is 5:1.

[0046] (3) BTA and 2-MBT with a mass ratio of 5:1 were simultaneously loaded in mesoporous silica nanospheres by a one-step in-situ loading method, and the actual loading in the nanocarrier was measured by a UV-visible spectrophotometer. The ratio of the corrosion inhibitor concentration, if the ratio is not equal to 5:1, then adjust the mass ratio of BTA and 2-MBT added to the mesoporous silica, and prepare the mesoporous silica...

Embodiment 3

[0051] (1) Dissolve benzotriazole (BTA) and 2-mercaptobenzothiazole (2-MBT) in 3.5 wt. % NaCl solution.

[0052] (2) Soak the AA2024 aluminum alloy in the above-mentioned corrosion inhibitor solution, use the three-electrode system to measure the electrochemical impedance spectrum of the system, and compare the impedance modulus, it is determined that the optimal compounding ratio of the corrosion inhibitor synergistic effect is 5: 1.

[0053] (3) To prepare calcium carbonate micro-nanospheres, load BTA and 2-MBT respectively in calcium carbonate micro-nanospheres by low-pressure loading method: mix sodium dodecylbenzenesulfonate and sodium carbonate at a ratio of 1:1 to obtain Emulsion A, calcium chloride and sodium dodecylbenzenesulfonate were uniformly mixed to obtain emulsion B, and emulsion A and emulsion B were mixed and reacted for 20 minutes to obtain calcium carbonate micro-nanospheres. The prepared calcium carbonate micro-nanospheres and the corrosion inhibitor sol...

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Abstract

The invention relates to a method for optimizing the corrosion inhibition efficiency of corrosion inhibitors in a carrier. The method comprises the following steps of: firstly, adding corrosion inhibitors with a synergistic effect into a corrosive solution according to a plurality of different proportions, and selecting an optimal compounding proportion of the corrosion inhibitors through morphology observation and an electrochemical measurement technology; then, through regulation and control of a preparation process, loading the two corrosion inhibitors into the same micro-nano carrier, and ensuring that the proportion of the corrosion inhibitors in the composite carrier is equal to the optimal proportion; or adding the corrosion inhibitors into different micro-nano carriers respectively, and ensuring that the proportion of the corrosion inhibitors in the two carriers is equal to the optimal proportion. The composite carrier or two single carriers loaded with different corrosion inhibitors are added into a corrosive solution or a coating, so that the whole system has an optimal corrosion inhibition effect. The optimal proportion of the corrosion inhibitors is selected in advance, and then the corrosion inhibitors are added into the micro-nano carrier. The method is helpful for improving the corrosion inhibition performance of the carrier, and has wide application prospects in the fields of corrosion inhibitor carrier preparation and self-repairing anti-corrosive coating design.

Description

technical field [0001] The invention belongs to the technical field of corrosion protection, and in particular relates to a method for optimizing the corrosion inhibition efficiency of a corrosion inhibitor in a carrier. Background technique [0002] Steel materials, aluminum alloys, copper alloys and other metal materials are vulnerable to corrosion damage during service in construction, aerospace, transportation and other fields, which will cause serious safety hazards and economic losses. Corrosion inhibitor anti-corrosion is to add special chemical substances to the corrosive medium to reduce the corrosion rate of metals. Corrosion inhibitors have the advantages of high efficiency and low cost, simple operation, less dosage, wide application, relatively safe and good anti-corrosion effect. The situation of metal corrosion is usually complex, and the use of a single corrosion inhibitor often cannot achieve the best anti-corrosion effect. Therefore, in practical applicat...

Claims

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Application Information

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IPC IPC(8): G01N27/416C23F11/08
CPCG01N27/416C23F11/08
Inventor 马菱薇王亚杰王金科任晨浩杨昊张达威
Owner UNIV OF SCI & TECH BEIJING
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