Electrochemical preparation method for medical external use aluminum alloy multifunctional coating

A multi-functional coating and aluminum alloy technology, applied in the direction of anodic oxidation, can solve the problems of corrosion resistance and other issues that have not been discussed, and achieve the effect of high cost performance, expanded application range, and strong practicability

Inactive Publication Date: 2012-10-03
湖南迈迪科新材有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Patent CN1089311 reports a chemical dyeing process for aluminum or aluminum alloy anodic oxidation film, the dyeing effect is clear, but there is no discussion on corrosion resistance, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 After polishing, degreasing, derusting, washing and other processes, conventional aluminum alloys are immersed in 150g·L -1 sulfuric acid solution containing 10 g·L of aluminum ions -1 , where the anode is aluminum alloy that needs to be treated, the cathode is also aluminum alloy, the temperature is 10°C-40°C, the oxidation time is 30min, and the current density is 10 mA·cm -2 , after oxidation, take out the anode and immerse in clean water for a period of time to remove the electrolyte attached to the membrane to obtain a silver-gray aluminum alloy porous oxide membrane.

Embodiment 2

[0016] Embodiment 2, The silver-gray aluminum alloy prepared in Example 1 was used as the cathode, graphite was used as the anode, and the electrolyte solution was 10 g L -1 Silver nitrate+5 g·L -1 Magnesium sulfate+10 g·L -1 Potassium sodium tartrate, adjust the pH to 1 with nitric acid, the liquid temperature is 25°C, and the cathode current density is 50 mA cm -2 , the deposition time was 1min, the cathode was taken out and immersed in clear water to remove the solution attached to the film, and a golden aluminum alloy was obtained. Since this step is to deposit simple metal silver in the pores of the aluminum alloy, the oxide film has a certain conductivity of 65m S cm -1 .

Embodiment 3

[0017] Embodiment 3, The golden yellow aluminum alloy prepared in Example 2 was immersed in a solution containing 1 g·L -1 The holes are sealed in a nano-titanium dioxide aqueous solution, the treatment condition is 80-100°C, 10min, and then the aluminum alloy is taken out and immersed in clean water to remove the solution attached to the film, and dried to obtain a multi-layer film with decorative, corrosion-resistant, bactericidal and self-cleaning functions. Functional aluminum alloy coating. The oxide film is golden yellow, full in color, high in decoration, good in wettability to water, resistant to wiping and decolorization for more than 1000 times, and the corrosion rate in 5% sodium chloride aqueous solution is 10 -5 ~10 -6 A·cm -2 order of magnitude, compared with the aluminum alloy substrate (10 -4 A·cm -2 ) increased by 1 to 2 orders of magnitude.

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Abstract

The invention discloses an electrochemical preparation method for a medical external use aluminum alloy multifunctional coating. The medical external use aluminum alloy multifunctional coating prepared by the method has multifunctional purposes of decoration, corrosion resistance, sterilization, self cleaning and the like. According to the electrochemical preparation method, an aluminum alloy base material is subjected to anodic oxidation treatment and electrolytic coloring, so that a porous oxide film is formed on the surface of the aluminum alloy and contains certain metals such as silver, copper, zinc and the like; and the surface of the oxide film has self-cleaning nanometer titanium dioxide, so that the aluminum alloy has the functions of decoration, corrosion resistance, sterilization and self cleaning. The medical external use aluminum alloy multifunctional coating prepared by the electrochemical preparation method has the effects of decoration, corrosion resistance, sterilization and self cleaning, has the advantages of simple process, environmental protection, no toxicity, high stability of film layers and high practicability, meets various requirements on the aluminum alloy in the aspects of medical external use, and expands the application range of the aluminum alloy. According to the multifunctional coating obtained by the method, the aluminum alloy can be used in various fields of medical instruments such as disabled person stair handrails, medical carts, wheelchairs, stretchers, supports, intelligent call and the like.

Description

technical field [0001] The invention belongs to the aluminum alloy surface treatment preparation technology, and relates to an electrochemical preparation method of an aluminum alloy multifunctional coating for external medical use. Background technique [0002] Aluminum alloy has low density, but high specific strength, which is close to or exceeds high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in industry, and its usage is second only to steel. Aluminum alloys commonly used today are used in a large amount in construction, but their application in the medical field is still relatively narrow. Because aluminum alloys are light in weight, cheap, and have minimal toxicity, compared with stainless steel and titanium alloys, the price advantage of aluminum alloys in medicine is obvious. Therefore, there is still a lot of room for de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/08C25D11/22C25D11/18
Inventor 邓姝皓易丹青
Owner 湖南迈迪科新材有限公司
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