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Preparation method of magnesium stearate modified magnesium powder magnesium-rich primer

A technology of magnesium stearate and magnesium powder, applied in epoxy resin coatings, fibrous fillers, coatings, etc., can solve the problems of consuming magnesium powder and changing the surface morphology of magnesium powder, so as to prolong the service life and improve the utilization rate. rate and speed up the application process

Inactive Publication Date: 2017-12-26
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

Although this method improves the corrosion resistance of the magnesium-rich coating, it changes the surface morphology of the magnesium powder and consumes part of the magnesium powder.

Method used

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  • Preparation method of magnesium stearate modified magnesium powder magnesium-rich primer
  • Preparation method of magnesium stearate modified magnesium powder magnesium-rich primer
  • Preparation method of magnesium stearate modified magnesium powder magnesium-rich primer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of magnesium stearate modified magnesium powder magnesium-rich primer is carried out according to the following steps:

[0032] 1. Preparation of modified magnesium stearate powder: First, add 100 mL of butyl acetate to a 250 mL Erlenmeyer flask. Weigh 70 mg of magnesium stearate, add it into the butyl acetate solution, and stir magnetically to obtain the mixed solution a. Weigh 8.0 g of 400-mesh magnesium powder, add it to a, and stir at 20° C. for 24 hours to obtain magnesium stearate-modified magnesium powder butyl acetate mixture b.

[0033] 2. Filter the magnesium stearate-modified magnesium powder butyl acetate mixture b prepared in step 1, and dry the filtered magnesium powder at room temperature for 48 hours, that is, the magnesium stearate-modified magnesium powder. Magnesium powder and magnesium stearate modified magnesium powder were characterized by infrared (see figure 1 ). Modified magnesium powder at 1465 and 1577cm -1 The chara...

Embodiment 2

[0041] 1. Preparation of magnesium stearate modified magnesium powder: First, add 120 mL of butyl acetate to a 250 mL Erlenmeyer flask. Weigh 84 mg of magnesium stearate, add it into the butyl acetate solution, and stir magnetically to obtain the mixed solution a. Weigh 9.6 g of 400-mesh magnesium powder, add it to a, and stir at 20° C. for 48 h to obtain magnesium stearate-modified magnesium powder butyl acetate mixture b.

[0042] 2. Filter the magnesium stearate-modified magnesium powder butyl acetate mixture b prepared in step 1, and dry the filtered magnesium powder at room temperature for 48 hours, that is, the magnesium stearate-modified magnesium powder.

[0043] 3. Preparation of the 2024 aluminum alloy substrate: Cut the 2024 aluminum alloy into small pieces of 50 mm×50 mm. Grind with 140#, 400#, 600# and 800# sandpaper respectively, clean the polished substrates with distilled water and absolute ethanol respectively, and soak the cleaned substrates in absolute ethano...

Embodiment 3

[0048] 1. Preparation of modified magnesium stearate powder: First, add 100 mL of butyl acetate to a 250 mL Erlenmeyer flask. Weigh 70 mg of magnesium stearate, add it into the butyl acetate solution, and stir magnetically to obtain the mixed solution a. Weigh 8.0 g of 400-mesh magnesium powder, add it to a, and stir at 20° C. for 24 hours to obtain magnesium stearate-modified magnesium powder butyl acetate mixture b.

[0049] 2. Filter the magnesium stearate-modified magnesium powder butyl acetate mixture b prepared in step 1, and dry the filtered magnesium powder at room temperature for 48 hours, that is, the magnesium stearate-modified magnesium powder.

[0050] 3. Preparation of the 2024 aluminum alloy substrate: Cut the 2024 aluminum alloy into small pieces of 50 mm×50 mm. Grind with 140#, 400#, 600# and 800# sandpaper respectively, clean the polished substrates with distilled water and absolute ethanol respectively, and soak the cleaned substrates in absolute ethanol fo...

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Abstract

The invention relates to a magnesium-rich primer, in particular to a preparation method of a magnesium stearate modified magnesium powder magnesium-rich primer. The modified magnesium powder of magnesium stearate is obtained by dispersing the magnesium powder in a butyl acetate solution of magnesium stearate and stirring, and the modified magnesium powder is used for preparing a magnesium-rich primer. The method of the present invention can reduce the reaction speed of the magnesium powder in the cathodic protection process without changing the original morphology and composition of the magnesium powder surface, prolong the service life of the magnesium-rich primer, and will play an important role in anti-corrosion fields such as aviation and ocean engineering. effect.

Description

technical field [0001] The invention relates to a magnesium-rich primer, in particular to a preparation method of a magnesium stearate modified magnesium powder magnesium-rich primer. Background technique [0002] Magnesium-rich primer corrosion protection, as an alternative to chromium-free corrosion protection technology, has broad application prospects in many fields, especially in aviation. The corrosion protection of aluminum alloy by magnesium-rich primer is a sacrificial anode electrochemical cathodic protection strategy. That is, when the corrosive medium penetrates the coating and reaches the interface between the magnesium-rich primer and the aluminum or aluminum alloy substrate, since the corrosion potential of magnesium is lower than that of aluminum and aluminum alloy, magnesium first reacts with the corrosive medium to prevent the base metal from Corrosion occurs. [0003] However, because the magnesium powder is very active, it usually reacts rapidly during ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D179/08C09D7/12C09D5/10C09C1/62C09C3/08
Inventor 陈卓元郭玉娣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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