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A kind of preparation method of iron-rich coating on the surface of magnesium alloy

A magnesium alloy and coating technology, applied in the direction of metal material coating process, coating, liquid chemical plating, etc., can solve the problem of poor corrosion resistance of magnesium alloys, and achieve the improvement of corrosion resistance, experimental equipment and experimental reagents. Less experimental equipment and experimental reagents are easily available

Active Publication Date: 2019-12-10
黑龙江省工研院资产经营管理有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor corrosion resistance of existing magnesium alloys, and provide a method for preparing iron-rich coatings on the surface of magnesium alloys

Method used

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  • A kind of preparation method of iron-rich coating on the surface of magnesium alloy
  • A kind of preparation method of iron-rich coating on the surface of magnesium alloy
  • A kind of preparation method of iron-rich coating on the surface of magnesium alloy

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specific Embodiment approach 1

[0023] Embodiment 1: This embodiment is a method for preparing an iron-rich coating on the surface of a magnesium alloy, which is specifically completed according to the following steps:

[0024] 1. Use 600# sandpaper and 2000# sandpaper to polish the surface of the magnesium alloy substrate in sequence until the surface of the magnesium alloy substrate is smooth, then remove the oil stain on the surface of the magnesium alloy substrate, and then use deionized water to rinse the surface of the magnesium alloy substrate to remove the oil stain 3 to 5 times, and finally use a hair dryer to dry to obtain a polished magnesium alloy;

[0025] 2. ①. Soak the polished magnesium alloy in the reduction deposition solution for 30s~60s, take it out, wash it with absolute ethanol for 3~5 times, and then use a hair dryer to dry it;

[0026] ②, repeat step 2 ① 5 to 20 times to obtain the deposited magnesium alloy;

[0027] ③. React the deposited magnesium alloy in the ferrous sulfate solut...

specific Embodiment approach 2

[0036] Embodiment 2: This embodiment differs from Embodiment 1 in that: the magnesium alloy substrate described in step 1 is MB15 magnesium alloy. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0037] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the reduction deposition solution described in step 2 ① is 75g / L~150g / L FeSO 4 ·7H 2 O solution. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of an iron-enriched coating on the surface of a magnesium alloy and relates to a method of preparing a coating on the surface of the magnesium alloy. The invention aims to solve the problem that an existing magnesium alloy is poor in corrosion resistance. The method comprises the following steps: I, preparing a ground magnesium alloy; II, preparing themagnesium alloy where iron is deposited on the surface; and III, carrying out solvent thermal treatment to obtain the magnesium alloy, the surface of which contains the iron-enriched coating. The corrosion potential of the prepared magnesium alloy, the surface of which contains the iron-enriched coating, is <->0.8V-<->0.5V, the corrosion current density is 1*10<-6>A / cm<2>-1*10<-8>A / cm<2>, and thepolarization resistance is 1000ohm.cm<2>-40000ohm.cm<2>. The method disclosed by the invention is suitable for preparing the iron-enriched coating on the surface of the magnesium alloy.

Description

technical field [0001] The invention relates to a method for preparing a coating on the surface of a magnesium alloy. Background technique [0002] Magnesium and magnesium alloys have broad application prospects in the field of biodegradable implant materials due to their mechanical properties and density close to those of human bones, as well as good biocompatibility and degradability. However, magnesium alloys are very active, and are prone to corrosion in complex physiological system environments with a pH value of 7.4 to 7.6 and rich in Cl ions. Therefore, the corrosion of magnesium alloy is poor, the standard corrosion potential of MB15 magnesium alloy is -2.37V, and the polarization resistance is 220Ω·cm 2 , corrosion current density 2.460×10 -4 A / cm 2 . Once a magnesium alloy is implanted inside the human body, the implant loses its mechanical integrity before the tissue heals sufficiently. The chemical activity of magnesium alloy hinders its application. We can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/52
CPCC23C18/1637C23C18/1689C23C18/1692C23C18/52
Inventor 姚忠平夏琦兴周扬李东琦姜兆华
Owner 黑龙江省工研院资产经营管理有限公司
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