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Corrosion inhibitor for inhibiting corrosion of magnesium alloy and its application in automobile coolant

A technology of automobile cooling and ascorbyl palmitate, which is applied in the corrosion inhibitor for inhibiting magnesium alloy corrosion and in the application field of automobile coolant, can solve the problems of environmental pollution, poor corrosion inhibition effect, etc., and achieves good economy and increased The effect of bonding force, good corrosion inhibition performance

Active Publication Date: 2020-10-30
江苏艾德露环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a kind of corrosion inhibitor that suppresses the corrosion of magnesium alloy and its application in automobile coolant, solve existing corrosion inhibitor to have poor corrosion inhibition effect, environmental pollution and Mostly a mixed recipe problem

Method used

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  • Corrosion inhibitor for inhibiting corrosion of magnesium alloy and its application in automobile coolant
  • Corrosion inhibitor for inhibiting corrosion of magnesium alloy and its application in automobile coolant
  • Corrosion inhibitor for inhibiting corrosion of magnesium alloy and its application in automobile coolant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] At a temperature of 30°C, add equal volumes of different concentrations of ascorbyl palmitate into the ethylene glycol cooling liquid submerged in the AM60 magnesium alloy and mix evenly, so that the final concentrations of ascorbyl palmitate in the cooling liquid are 0, 5ppm, 10ppm, 20ppm, 30ppm, and 50ppm. The corrosion inhibition effect of different concentrations of ascorbyl palmitate on magnesium alloy was tested. Electrochemical impedance spectroscopy analysis was performed on magnesium alloys in ethylene glycol coolant, the results are as follows figure 1 shown, the corresponding polarization resistance R p And the calculated corrosion inhibition efficiency values ​​are shown in Table 1.

[0031] Table 1

[0032] Concentration (ppm) R p (Ω·cm 2 )

[0033] From figure 1 It can be seen that with the increase of the concentration of ascorbyl palmitate, the polarization resistance of AM60 magnesium alloy also gradually increases. The value of the...

Embodiment 2

[0035] At a temperature of 55°C, add equal volumes of different concentrations of ascorbyl palmitate into the ethylene glycol cooling liquid submerged in the AM60 magnesium alloy and mix evenly, so that the final concentrations of ascorbyl palmitate in the cooling liquid are 0, 5ppm, 10ppm, 20ppm, 30ppm, and 50ppm. The corrosion inhibition effect of different concentrations of ascorbyl palmitate on magnesium alloy was tested. Electrochemical impedance spectroscopy analysis was performed on magnesium alloys in ethylene glycol coolant, the results are as follows figure 2 shown, the corresponding polarization resistance Rp And the calculated corrosion inhibition efficiency values ​​are shown in Table 2.

[0036] Table 2

[0037] Concentration (ppm) R p (Ω·cm 2 )

[0038] From figure 2 It can be seen that with the increase of the concentration of ascorbyl palmitate, the polarization resistance of AM60 magnesium alloy also gradually increases. The value of pol...

Embodiment 3

[0040] At a temperature of 88°C, add equal volumes of different concentrations of ascorbyl palmitate into the ethylene glycol cooling liquid submerged in the AM60 magnesium alloy and mix evenly, so that the final concentrations of ascorbyl palmitate in the cooling liquid are 0, 5ppm, 10ppm, 20ppm, 30ppm, and 50ppm. The corrosion inhibition effect of different concentrations of ascorbyl palmitate on magnesium alloy was tested. Electrochemical impedance spectroscopy analysis was performed on magnesium alloys in ethylene glycol coolant, the results are as follows image 3 shown, the corresponding polarization resistance R p and the calculated values ​​of corrosion inhibition efficiency are shown in Table 3.

[0041] table 3

[0042] Concentration (ppm) R p (Ω·cm 2 )

[0043] From image 3 It can be seen that with the increase of the concentration of ascorbyl palmitate, the polarization resistance of AM60 magnesium alloy also gradually increases. The value of ...

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Abstract

The invention discloses a corrosion inhibitor for inhibiting corrosion of magnesium alloy and application of the corrosion inhibitor in automobile cooling liquid. The corrosion inhibitor comprises ascorbyl palmitate, and the corrosion inhibitor is directly added into the cooling liquid immersing the magnesium alloy during use. The ascorbyl palmitate can form a hydrophobic membrane on the surface of the magnesium alloy substrate, diffusion of water molecules and other corrosive substances to the surface of the magnesium alloy substrate can be blocked, so that the ascorbyl palmitate shows good corrosion inhibition effect, and corrosion of the magnesium alloy engine can be effectively inhibited; the problem that the magnesium alloy material corrodes in the ethylene glycol cooling liquid at normal temperature and high temperature is solved, and corrosion inhibition efficiency is up to 97.29%. The corrosion inhibitor has the advantages of being less in consumption amount, low in cost, simple in components, easy to obtain, environmental-friendly, wide in application range, safe and convenient to operate, and high in economical efficiency.

Description

technical field [0001] The invention relates to the technical field of anticorrosion of metal materials, in particular to a corrosion inhibitor for inhibiting corrosion of magnesium alloys and its application in automobile coolant. Background technique [0002] Magnesium alloy is known as "the most potential and promising green engineering material in the 21st century". It has low density, high specific strength, large elastic modulus, good shock absorption, and greater impact load capacity than aluminum alloy. Applications in electronic communications, automobiles and other fields are becoming more and more extensive. At present, major automobile companies are rushing to develop magnesium alloy engines, which can significantly reduce the weight and fuel consumption of automobiles, and reduce environmental pollution. Therefore, in the near future, magnesium alloy will become an important engine material. [0003] Coolant is the circulating heat transfer medium in the engin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/12C09K5/20
CPCC09K5/20C23F11/128
Inventor 郑兴文龚敏俞滟左寒阳张龄丹
Owner 江苏艾德露环保科技有限公司