Preparation method of biodegradable magnesium alloy surface-modified hydroxyapatite coating
A hydroxyapatite and surface modification technology, which is applied in the coating process and coating of metal materials, can solve the problems of fast corrosion speed and achieve the goal of improving corrosion resistance, reducing degradation rate and improving biocompatibility Effect
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Embodiment 1
[0021] (1) Cut the ZK60 magnesium alloy into medium-sized samples with a wire cutting machine, and then polish them with 800# and 2000# alumina water-resistant sandpaper to remove the oxide layer on the surface of the magnesium alloy, and then use deionized water and absolute ethanol to ultrasonically clean them. 10min, and dry at room temperature, set aside;
[0022] (2) Configuration of conversion solution: the conversion solution used is prepared from sodium dihydrogen phosphate dihydrate and calcium nitrate tetrahydrate, and 1# conversion solution with 0.5Ca / 0.5P is prepared (as shown in Table 1);
[0023] (3) Preparation of the calcium-phosphorus coating: the matrix sample obtained by the pretreatment in step (1) is placed in the conversion solution obtained in the step (2) and soaked for 72 hours to obtain the calcium-phosphorus coating;
[0024] (4) Coating heat treatment: the calcium phosphorus coating that step (3) obtains adopts heat treatment process to prepare hydr...
Embodiment 2
[0027] (1) Cut the ZK60 magnesium alloy into medium-sized samples with a wire cutting machine, and then polish them with 800# and 2000# alumina water-resistant sandpaper to remove the oxide layer on the surface of the magnesium alloy, and then use deionized water and absolute ethanol to ultrasonically clean them. 10min, and dry at room temperature, set aside;
[0028] (2) Configuration of conversion solution: the conversion solution used is prepared from sodium dihydrogen phosphate dihydrate and calcium nitrate tetrahydrate, and 1# conversion solution with 0.5Ca / 0.5P is prepared (as shown in Table 1);
[0029] (3) Preparation of the calcium-phosphorus coating: the matrix sample obtained by the pretreatment in step (1) is placed in the conversion solution obtained in the step (2) and soaked for 72 hours to obtain the calcium-phosphorus coating;
[0030] (4) Coating heat treatment: the calcium phosphorus coating that step (3) obtains adopts heat treatment process to prepare hydr...
Embodiment 3
[0033] (1) Cut the ZK60 magnesium alloy into medium-sized samples with a wire cutting machine, and then polish them with 800# and 2000# alumina water-resistant sandpaper to remove the oxide layer on the surface of the magnesium alloy, and then use deionized water and absolute ethanol to ultrasonically clean them. 20min, and dry at room temperature, set aside;
[0034] (2) Configuration of conversion solution: The conversion solution used is prepared from sodium dihydrogen phosphate dihydrate and calcium nitrate tetrahydrate, and the 2# conversion solution of Ca / P is prepared (as shown in Table 1);
[0035] (3) Preparation of the calcium-phosphorus coating: the substrate sample obtained by the pretreatment in step (1) is placed in the conversion solution obtained in the step (2) and soaked for 48 hours to obtain the calcium-phosphorus coating;
[0036] (4) Coating heat treatment: the calcium-phosphorus coating obtained in step (3) is prepared by a heat treatment process to prepar...
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