Process for anode oxidation coloration of titanium and titanium alloy surface

An anodizing and titanium alloy technology, applied in the field of titanium and titanium alloys, can solve the problems of uneven color, single coloring effect, chemical instability, etc., and achieve good bonding force and corrosion resistance, good decorative effect, and fewer process steps. Effect

Inactive Publication Date: 2006-10-11
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 3) The anodic oxidation composed of phosphoric acid and sulfuric acid can obtain a certain coloring effect by controlling the voltage. However, due to the strong acidity, the operable range is low, and the temperature is too high, which will cause the film layer to melt and cause uneven color.
[0007] 4) The published anodic oxidation coloring patent can only form a single coloring effect (Chinese patent: 200310103374.8)
[0009] 1) The chemical properties of titanium and titanium alloys are active, and they can form an oxide film with certain protective properties. The film is chemically unstable and prone to defects that hinder the combination of the anodic oxide film and the substrate, and at the same time cause the oxide film to have poor color. uniform
[0010] 2) The traditional anodic oxidation coloring can only obtain a single coloring effect, and when the oxide films of different thicknesses are superimposed, the color will be uneven

Method used

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  • Process for anode oxidation coloration of titanium and titanium alloy surface
  • Process for anode oxidation coloration of titanium and titanium alloy surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Alkali washing, at room temperature, add sodium carbonate (20g), sodium phosphate (20g), sodium silicate (10g) in turn to deionized aqueous solution (1L), heat up to 70°C after the dissolution is complete, and process it into 10mm Put the commercially pure titanium sample of size ×10mm×2mm into the alkaline cleaning solution and continue to stir it ultrasonically, and take it out after 15 minutes of treatment. At room temperature, put the alkali-washed titanium into flowing deionized water for 2 minutes and take it out.

[0025] 2) Pickling, at room temperature, add hydrofluoric acid (50mL) and nitric acid (200mL) with a concentration of 40% in sequence in deionized aqueous solution (750mL), and put the titanium after alkali washing into the pickling solution Take out after processing for 60s. At room temperature, put the acid-washed titanium into flowing deionized water and wash it for 2 minutes before taking it out.

[0026] 3) Anodizing coloring, at 15°C, add ph...

Embodiment 2

[0037] 1) Alkali washing, at room temperature, add sodium carbonate (20g), sodium phosphate (20g), sodium silicate (15g) in turn to deionized aqueous solution (1L), and heat to 70°C after the dissolution is complete, and TC4 titanium alloy Put the sample into the alkaline cleaning solution and continue ultrasonic stirring, and take it out after 15 minutes of treatment. At room temperature, put the alkali-washed titanium alloy into flowing deionized water for 2 minutes and take it out.

[0038] 2) Pickling, at room temperature, add hydrofluoric acid (50mL) and nitric acid (200mL) with a concentration of 40% in sequence in a deionized aqueous solution (750mL), and put the titanium alloy after alkali cleaning into the pickling solution Take it out after 60 seconds of medium treatment. At room temperature, put the pickled titanium alloy in flowing deionized water for 2 minutes and take it out. The surface structure analysis of the treated titanium alloy is shown in figure 1 , t...

Embodiment 3

[0048] 1) alkali washing, with embodiment 2.

[0049] 2) pickling, with embodiment 2.

[0050] 3) Anodic oxidation coloring, at 25°C, add phosphoric acid (80mL), oxalic acid (12g), manganese sulfate (3g) in sequence in deionized water solution (700mL) under stirring, after the dissolution is complete, add the composite additives under stirring, in turn For: sodium p-benzenesulfonate (3g), sulfosalicylic acid (3g). Finally, deionized water was added to make up to 1 L. Put the titanium alloy after the above treatment into the solution, use stainless steel as the cathode and titanium alloy as the anode, apply 7A·dm -2 The constant current is boosted to 45V and then the constant voltage is taken out after 25 minutes of treatment. At room temperature, put the anodized titanium alloy into flowing deionized water and wash it for 2 minutes before taking it out.

[0051] 4) Sealing, put the anodized and colored titanium alloy into boiling deionized water, and seal for 30 minutes. ...

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Abstract

This invention relates to titanium and titanium alloy surface anode oxidation bepainting method. This invention has following steps: dealing with titanium and titanium alloy in alkali solution for 10-15min under 60-75deg C and ultrasonic condition, then rinsing, and then putting it in acid solution for 0.5-1min, and then rinsing, and then under the condition that the temperature is 15-35deg C, the current density is 5-10Am-2, the voltage is 20-90V, putting it in anode oxidation bepainting solution to bepaint for 15-30min,then rinsing, and then dealing with it closely for 15-30min in non-ionic water, and then drying for 30-60min under 110-130deg C. The advantage in this invention is that the steps are few, the operation is simple, and it is easy to maintain.

Description

technical field [0001] The invention relates to a titanium and titanium alloy, in particular to an anodic oxidation and coloring process for the surface of the titanium and the titanium alloy. Background technique [0002] Titanium and titanium alloys have excellent thermal stability and high specific strength. They are active metals that can quickly form oxide films like magnesium alloys and aluminum alloys, and can make up for the inability of aluminum alloys and magnesium alloys to be used at temperatures higher than 425°C. lack of. In recent years, titanium and titanium alloys have been widely used in the field of national defense cutting-edge technology and civilian industry. For example, in aerospace, titanium and titanium alloys are used in the production of new generation aircraft due to their small specific gravity, light weight and high strength; in medicine, titanium and titanium alloys are widely used in teeth, bones and Intravascular stents and other aspects h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26
Inventor 王周成唐毅
Owner XIAMEN UNIV
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