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Anticorrosive inhibitor of carbon steel and preparation method thereof

A corrosion inhibitor and anti-corrosion technology, which is applied in the direction of metal material coating technology to achieve good corrosion inhibition effect

Inactive Publication Date: 2011-04-13
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many studies on rare earth metal salts at home and abroad, but they are mainly concentrated on the corrosion inhibitors of aluminum, zinc and their alloys and the rare earth surface conversion coating on metals, while the widely used Q345 alloy steel in seawater corrosive media Research not yet reported

Method used

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  • Anticorrosive inhibitor of carbon steel and preparation method thereof
  • Anticorrosive inhibitor of carbon steel and preparation method thereof
  • Anticorrosive inhibitor of carbon steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of corrosion inhibitor for Q345 alloy steel

[0027] The solute is Ce(NO 3 ) 3 , the solvent is deionized water, and finally prepared into Ce(NO 3 ) 3 Single compound corrosion inhibitor.

[0028] Ce(NO 3 ) 3 Corrosion Inhibition Effect of Single Corrosion Inhibitor on Q345 Alloy Steel in Simulated Seawater

[0029] attached figure 1 Q345 alloy steel electrode without adding corrosion inhibitor and adding concentration of 0.8g / L Ce(NO 3 ) 3 The polarization curves after immersion in the simulated seawater solution for 0.5h, in which curve 1 and curve 2 represent no corrosion inhibitor and the concentration of 0.8g / L Ce(NO 3 ) 3 The polarization curves of the corresponding corrosion potential and corrosion current density data are shown in Table 1. The corrosion inhibition efficiency (η%) of the corrosion inhibitor is calculated according to the following formula:

[0030] η = I 0 ...

Embodiment 2

[0036] A kind of corrosion inhibitor for Q345 alloy steel

[0037] The solute is Ce(NO 3 ) 3 and (NH 4 ) 2 MoO 4 , the solvent is deionized water, equipped with 6 groups of Q345 alloy steel anti-corrosion and corrosion inhibitors. The first group is blank simulated seawater, and the Ce(NO 3 ) 3 The concentrations are all 0.8g / L, while (NH 4 ) 2 MoO 4 The concentrations are 0g / L, 0.01g / L, 0.05g / L, 0.1g / L, 0.15g / L, respectively.

[0038] attached figure 2 It is Q345 alloy steel adding 0.8g / LCe(NO3 ) 3 and different concentrations (NH 4 ) 2 MoO 4 The AC impedance diagram in the simulated seawater solution, where curve 1 is the impedance diagram without adding any corrosion inhibitor, and curve 2, curve 3, curve 4, curve 5 and curve 6 respectively represent (NH 4 ) 2 MoO 4 Impedance diagrams at concentrations of 0g / L, 0.01g / L, 0.05g / L, 0.1g / L, and 0.15g / L. The resistance value is used to judge the corrosion inhibition performance. The higher the resistance value...

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Abstract

The invention discloses an anticorrosive inhibitor of Q345 alloy steel and a preparation method thereof, belonging to the technical field of metal material corrosion and protection. In the anticorrosive inhibitor of the Q345 alloy steel, the solute is compounded from Ce(NO3)3 and (NH4)2MoO4 in a ratio of (0-1) to (0-0.15), the solvent is deionized water, and the finally obtained inhibitor has the concentration of 0-0.95 g / l. When the inhibitor contains 0.8g / l of Ce(NO3)3 and 0.1g / l of (NH4)2MoO4, the Q345 alloy steel has the lowest corrosion current density of 9.943 mua / cm<2> and the corresponding highest inhibition rate of 87.16 percent. The anticorrosive inhibitor of the Q345 alloy steel is environment friendly and has favorable inhibition effect on the corrosion inhibition of the Q345 alloy steel in the system after being compounded for use.

Description

technical field [0001] The invention relates to a Q345 alloy steel anti-corrosion corrosion inhibitor and a preparation method thereof, belonging to the technical field of metal material corrosion and protection. Background technique [0002] Steel is an important material related to the development of the national economy and is widely used in various pipeline equipment. However, in different application environments, steel has different degrees of corrosion, which has brought huge economic losses and social harm to human beings. The research and development of steel corrosion inhibitor is of great significance to promote the sustainable development of national economy. Since human beings are facing the crisis of serious shortage of fresh water resources, it is imperative to develop and utilize seawater vigorously. Due to its strong corrosiveness, seawater is easy to cause damage to equipment. Using corrosion inhibitors in seawater medium to protect metals in seawater env...

Claims

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Application Information

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IPC IPC(8): C23C22/40
Inventor 徐群杰时士峰张亦论云虹
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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