Phosphorizing liquid doped with silicon carbide nanoparticles or hydroxyapatite particlesas well as phosphorizing treatment method of magnesium or magnesium alloy

A technology of hydroxyapatite and nano-silicon carbide, which is applied in the coating process of metal materials, can solve the problems of poor corrosion resistance and wear resistance of phosphating film, burns, dyspnea, shock, etc., and achieve improved shape Effects of nuclear rate, risk reduction, and promotion of further refinement

Active Publication Date: 2019-11-08
HUNAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent with publication number 100519840C discloses a method for phosphating the surface of magnesium alloys. The phosphating solution used in the method includes the following components: phosphoric acid 20mL / L, zinc oxide 5g / L, sodium fluoride 3g / L, nitric acid Sodium 0.4g / L. This patent improves the compactness of the phosphating film through the promotion of sodium fluoride and hydrogen peroxide, but there are still two significant defects: 1. Sodium fluoride is a highly toxic substance. It can cause severe nausea, vomiting, abdominal pain, and diarrhea. In severe cases, it may even cause breathing difficulties and shock. Skin contact with sodium fluoride can also cause severe burns; 2. The corrosion resistance and wear resistance of the phosphating film obtained after phosphating treatment The performance is still not good and needs to be further improved

Method used

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  • Phosphorizing liquid doped with silicon carbide nanoparticles or hydroxyapatite particlesas well as phosphorizing treatment method of magnesium or magnesium alloy
  • Phosphorizing liquid doped with silicon carbide nanoparticles or hydroxyapatite particlesas well as phosphorizing treatment method of magnesium or magnesium alloy
  • Phosphorizing liquid doped with silicon carbide nanoparticles or hydroxyapatite particlesas well as phosphorizing treatment method of magnesium or magnesium alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A kind of phosphating solution doped with nano-silicon carbide particles, comprising the following components: zinc nitrate 80g / L, zinc dihydrogen phosphate 35g / L, phosphoric acid 5g / L, nano-silicon carbide particles 0.4g / L, which is obtained by the following method Prepared from:

[0033] S1. Put nano-silicon carbide particles with a size of 100nm into acetone and ethanol in turn for ultrasonic cleaning, and then place them in a drying oven for drying;

[0034] S2. Dissolve zinc nitrate and zinc dihydrogen phosphate in water, and then place them in an ultrasonic environment and mix for 30 minutes. After mixing, add phosphoric acid solution and heat to 60°C. Finally, add the dried nano-silicon carbide particles in step S1 and place them again. It is obtained after mixing for 5 minutes in an ultrasonic environment.

[0035] Wherein, the power of the two ultrasonic mixing in step S2 is 200W, and the instrument used to provide the ultrasonic environment can be an ultrason...

Embodiment 2

[0041] A phosphating solution doped with nano-silicon carbide particles, comprising the following components: zinc nitrate 80g / L, zinc dihydrogen phosphate 35g / L, phosphoric acid 5g / L, nano-silicon carbide particles 0.001g / L, which is obtained by the following method Prepared from:

[0042] Phosphating solution is prepared by the following method:

[0043] S1. Put nano-silicon carbide particles with a size of 10nm into acetone and ethanol in turn for ultrasonic cleaning, and then place them in a drying oven for drying;

[0044] S2. Dissolve zinc nitrate and zinc dihydrogen phosphate in water, and then mix them in an ultrasonic environment for 20 minutes. After mixing, add phosphoric acid solution and heat to 40°C. Finally, add the dried nano-silicon carbide particles in step S1 and place them again. It is obtained after mixing for 4 minutes in an ultrasonic environment.

[0045] Wherein, the power of the two ultrasonic mixing in step S2 is 50W, the instrument used to provide...

Embodiment 3

[0051] A phosphating solution doped with nano-silicon carbide particles, comprising the following components: zinc nitrate 80g / L, zinc dihydrogen phosphate 35g / L, phosphoric acid 5g / L, nano-silicon carbide particles 1g / L, prepared by the following method into:

[0052] Phosphating solution is prepared by the following method:

[0053] S1. Put nano-silicon carbide particles with a size of 200nm into acetone and ethanol in turn for ultrasonic cleaning, and then place them in a drying oven for drying;

[0054] S2. Dissolve zinc nitrate and zinc dihydrogen phosphate in water, then mix in an ultrasonic environment for 40 minutes, add phosphoric acid solution after mixing and heat to 80°C, and finally add nano-silicon carbide particles dried in step S1 and place again It is obtained after mixing in an ultrasonic environment for 6 minutes.

[0055] Wherein, the power of the two ultrasonic mixing in step S2 is 500W, the instrument used to provide the ultrasonic environment can be an...

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Abstract

The invention relates to phosphorizing liquid doped with silicon carbide nanoparticles or hydroxyapatite particles. The phosphorizing liquid doped with the silicon carbide nanoparticles or the hydroxyapatite particles comprises the following components includingzinc nitrate, zinc dihydrogen phosphate, phosphoric acid and the 0.001-1 g/Lof silicon carbide nanoparticles or hydroxyapatiteparticles. The phosphorizing liquid is prepared by the following method ofS1, ultrasonically cleaning the silicon carbide nanoparticles or the hydroxyapatite particles and conducting drying; S2, dissolving the zinc nitrate and the zinc dihydrogen phosphate into water, conducting mixing, adding a phosphoric acid solution, adding the silicon carbide nanoparticles or the hydroxyapatite particles, putting a mixture in an ultrasonic environment, mixing for 4-6 minutes, and then obtaining the phosphorizing liquid. A phosphorizing treatment method of magnesium or magnesium alloy comprises the following steps ofperforming pretreatment; immersing the magnesium or magnesium alloy into the phosphorizing liquid and starting ultrasonic waves, wherein the deposition time is 1-20 minutes and the temperature is 40-80 DEG C; and blow-drying after complete washing with water. The phosphorizing liquid is used for performing phosphorizing treatment on the magnesium or magnesium alloy and can effectively increase thenucleation rate and promote grain refinement of a phosphorizing film; and the generated phosphorizing film has excellent corrosion resistance and wear resistance.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a phosphating solution doped with nano silicon carbide particles or hydroxyapatite particles and a phosphating treatment method for magnesium or magnesium alloy. Background technique [0002] Magnesium is one of the three most abundant metallic elements in the Earth's crust, after aluminum and iron. Magnesium alloy is one of the lightest non-ferrous metal materials among industrial practical metals. It has been widely used in the fields of aerospace, automobile industry, electronic information, and household appliances, and has broad development potential. Magnesium or magnesium alloys are unstable in most common media and are not resistant to corrosion or wear. Therefore, in order to make magnesium or magnesium alloy meet the requirements of corrosion resistance and wear resistance, it must be surface treated. The current phosphating process of magnesium or mag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07C23C22/73C23C22/78
CPCC23C22/07C23C22/73C23C22/78
Inventor 毛祖莉杨丽邓彬
Owner HUNAN INST OF TECH
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