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Corrosion inhibitor for inhibiting corrosion of magnesium alloy in automobile cooling liquid

A technology of automobile cooling and corrosion inhibitor, which is applied in the field of anticorrosion of metal materials, can solve the problems of no magnesium alloy automobile coolant corrosion inhibitor research, etc., and achieve excellent corrosion inhibition effect, simple production and wide application range

Active Publication Date: 2010-09-29
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few studies on corrosion inhibitors for magnesium alloy automobile coolants in my country, and there is no research on corrosion inhibitors for magnesium alloy automobile coolants at high temperatures.

Method used

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  • Corrosion inhibitor for inhibiting corrosion of magnesium alloy in automobile cooling liquid
  • Corrosion inhibitor for inhibiting corrosion of magnesium alloy in automobile cooling liquid
  • Corrosion inhibitor for inhibiting corrosion of magnesium alloy in automobile cooling liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Mix 25% of sodium benzoate, 25% of sodium phosphate and 50% of distilled water in a weight ratio and stir evenly to prepare the corrosion inhibitor for GW103 magnesium alloy automobile coolant.

[0017] Table 1 Evaluation results of the corrosion inhibitor at different concentrations in automobile coolant at 25°C and 70°C

[0018]

[0019] Table 2 The evaluation results of the corrosion inhibitor in the automobile coolant under different temperatures, the concentration of the corrosion inhibitor is 500ppm.

[0020]

[0021]

Embodiment 2

[0023] 40% sodium tungstate, 40% sodium phosphate and 20% distilled water are mixed with each other in a weight ratio and stirred evenly to prepare a corrosion inhibitor for GW103 magnesium alloy automobile coolant.

[0024] The corrosion inhibition effect was evaluated by the same experimental method as that in Embodiment 1. Table 3 shows the evaluation results of the corrosion inhibitor in automobile coolant at different temperatures. The corrosion inhibitor concentration is 500ppm.

[0025] Table 3 Evaluation results of the corrosion inhibitor in automobile coolant at different temperatures, the concentration of the corrosion inhibitor is 500ppm.

[0026]

Embodiment 3

[0028] 45% octahydroxyquinoline, 45% benzotriazole and 10% ethanol are mixed with each other in a weight ratio and stirred evenly to prepare a corrosion inhibitor for inhibiting GW103 magnesium alloy automobile coolant corrosion.

[0029] The corrosion inhibition effect was evaluated by the same experimental method as that in Embodiment 1. Table 4 shows the evaluation results of the corrosion inhibitor in automobile coolant at different temperatures. The corrosion inhibitor concentration is 500ppm.

[0030] The evaluation results of the corrosion inhibitor in automobile coolant under different temperatures in Table 4, the corrosion inhibitor concentration is 500ppm.

[0031]

[0032]

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PUM

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Abstract

The invention provides a corrosion inhibitor for inhibiting corrosion of magnesium alloy in automobile cooling liquid. The corrosion inhibitor consists of specific adsorption organic substance or / and film-forming inorganic substance, and water or / and ethanol. The corrosion inhibitor is a compound efficient anti-scale corrosion inhibitor, can well inhibit the corrosion of a magnesium alloy material in the cooling liquid in a wider temperature range, and has the characteristics of wide application range, low using amount, high efficiency, no toxicity or peculiar smell, full water dissolution, simple and convenient preparation, low cost, wide applicable temperature range, strong synergistic effect, convenient use, good comprehensive performance and the like. 100 to 1,000ppm corrosion inhibitor directly added into the automobile cooling liquid can inhibit the corrosion of the magnesium alloy, effectively inhibit the corrosion of the magnesium alloy material in the automobile cooling liquid at a normal temperature and a high temperature, and effectively protect the magnesium alloy.

Description

technical field [0001] The invention belongs to the anticorrosion technology of metal materials, and in particular relates to a corrosion inhibitor for inhibiting the corrosion of magnesium alloy in automobile coolant and a preparation method thereof. Background technique [0002] Magnesium and magnesium alloys are the metals with the lowest relative density in engineering materials. Due to their excellent structural properties, magnesium alloys are viable and competitive substitutes for engineering plastics, aluminum alloys and steel in many fields. As a structural material, magnesium can be widely used in automobiles, aerospace, electronics, military and nuclear industries to meet the "light weight" and other special technical requirements of audio-visual equipment, computers, reading equipment, vehicles and hand tools. Faced with the severe test and challenge of saving energy, reducing emissions and increasing recovery rate, the automobile industry in Europe, the United S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/08
Inventor 郭兴蓬黄道兵陈振宇
Owner HUAZHONG UNIV OF SCI & TECH
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