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Preparation method of Ca-P-Sn composite coating layer on surface of magnesium alloy

A composite coating and surface coating technology, applied in the direction of metal material coating process, can solve the problem of difficult to obtain coating, and achieve the effect of simple process, good corrosion resistance and biocompatibility, and compact structure

Active Publication Date: 2015-12-30
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its main disadvantage is that this technique makes it difficult to obtain coatings with a crystalline calcium-phosphorous phase

Method used

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  • Preparation method of Ca-P-Sn composite coating layer on surface of magnesium alloy
  • Preparation method of Ca-P-Sn composite coating layer on surface of magnesium alloy
  • Preparation method of Ca-P-Sn composite coating layer on surface of magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Magnesium alloy substrate: the composition is Mg-1Li-1Ca.

[0085] The preparation method is as follows:

[0086] The first step, the preparation step of the precursor solution

[0087] In parts by mass, 30 parts of sodium edetate, 40 parts of calcium nitrate, 10 parts of sodium dihydrogen phosphate, 1 part of nano-tin dioxide, and 1000 parts of water are respectively taken;

[0088] After blending sodium edetate, calcium nitrate and sodium dihydrogen phosphate, add water to dissolve, and use strong alkali (NaOH, KOH or Ca(OH) 2 ) adjusting the pH value to 2.0-4.0 to prepare a precursor solution;

[0089] The second step, magnesium alloy pretreatment step

[0090] The magnesium alloy substrate is subjected to mechanical grinding, the first water cleaning, alkali treatment, the second water washing, acid treatment, and the third water washing in sequence, and then the warm air is dried and set aside;

[0091] The third step, magnesium alloy substrate surface coating ...

Embodiment 2

[0097] Magnesium alloy substrate: the composition is Mg-1Li-1Ca.

[0098] The preparation method is as follows:

[0099] The first step, the preparation step of the precursor solution

[0100] In parts by mass, 50 parts of sodium edetate, 60 parts of calcium nitrate, 20 parts of sodium dihydrogen phosphate, 15 parts of nano-tin dioxide, and 1000 parts of water are respectively taken;

[0101] After blending sodium edetate, calcium nitrate and sodium dihydrogen phosphate, add water to dissolve, and use strong alkali (NaOH, KOH or Ca(OH) 2 ) adjusting the pH value to 2.0-4.0 to prepare a precursor solution;

[0102] The second step, magnesium alloy pretreatment step

[0103] The magnesium alloy substrate is subjected to mechanical grinding, the first water cleaning, alkali treatment, the second water washing, acid treatment, and the third water washing in sequence, and then the warm air is dried and set aside;

[0104] The third step, magnesium alloy substrate surface coatin...

Embodiment 3

[0110] Magnesium alloy substrate: the composition is Mg-1Li-1Ca.

[0111] The preparation method is as follows:

[0112] The first step, the preparation step of the precursor solution

[0113] In parts by mass, 70 parts of sodium edetate, 90 parts of calcium nitrate, 25 parts of sodium dihydrogen phosphate, 35 parts of nano-tin dioxide, and 1000 parts of water were respectively taken;

[0114] After blending sodium edetate, calcium nitrate and sodium dihydrogen phosphate, add water to dissolve, and use strong alkali (NaOH, KOH or Ca(OH) 2 ) adjusting the pH value to 2.0-4.0 to prepare a precursor solution;

[0115] The second step, magnesium alloy pretreatment step

[0116] The magnesium alloy substrate is subjected to mechanical grinding, the first water cleaning, alkali treatment, the second water washing, acid treatment, and the third water washing in sequence, and then the warm air is dried and set aside;

[0117] The third step, magnesium alloy substrate surface coati...

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Abstract

The invention discloses a preparation method of a Ca-P-Sn composite coating layer on the surface of magnesium alloy. The preparation method comprises the steps of taking sodium EDTA (Ethylene Diamide Tetraacetic Acid), calcium nitrate, monosodium phosphate, nano tin oxide of which the grain size is 50 to 70 nm and distilled water as raw materials to prepare a precursor solution; then soaking a to-be-processed magnesium alloy substrate in the precursor solution in a hydrothermal reaction kettle, regulating the pH (Potential of Hydrogen) value to be 2.0 to 4.0 by strong base, adding the nano tin oxide, and preparing the Ca-P-Sn composite coating layer, of which the thickness is 50 to 80 mum, on the surface of the magnesium alloy by adopting a hydrothermal method, namely, doping a Ca-P coating layer by utilizing tin oxide. Compared with the prior art, the preparation method disclosed by the invention has the advantages that the technology is simple, flow is short, the control is easy, the production cost is low, the obtained coating layer is compact in structure, strong in adhesion and good in anti-corrosion performance, and the like; an obtained product not only can be used for carrying out anti-corrosion treatment on a material for a magnesium alloy structure, but also is suitable for being applied to the field of medical magnesium alloy.

Description

technical field [0001] The invention relates to a preparation method of a magnesium alloy surface coating, in particular to a preparation method of a magnesium alloy surface calcium-phosphorus-tin composite coating. Background technique [0002] Magnesium is abundant in nature and cheap. Magnesium and its alloys have light weight, high specific strength, good biocompatibility and degradability; magnesium ions are the intracellular cations in the human body that are second only to potassium, sodium, and calcium. They can participate in protein synthesis and activate multiple cations in the body. An enzyme that regulates the activity of the central nervous system and muscles, and ensures the normal contraction of the myocardium. Therefore, magnesium alloys can not only be used in the fields of automobiles, motorcycles, high-speed rail, aerospace, 3C products and hand tools, but also as biodegradable biomedical metal materials. [0003] Compared with traditional polylactic ac...

Claims

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Application Information

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IPC IPC(8): C23C22/07
Inventor 曾荣昌魏光斌王蕾李硕琦张芬
Owner SHANDONG UNIV OF SCI & TECH
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