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Titanium alloy electrochemical oxidation liquid

An oxidizing solution and electrochemical technology, applied in the field of oxidizing solution, can solve the problems of poor promotion of anodic oxide film thickening, weak promotion of pitting resistance, unsatisfactory anodic oxide film thickness, etc. Thickness, improvement of pitting resistance, effect of changing composition

Inactive Publication Date: 2009-12-23
吴昊
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] When the above three types of oxidizing solutions are used to anodize titanium alloys, due to the special surface physical and chemical properties of titanium alloys, the above three types of oxidizing solutions can promote the formation of anodized films on the surface of titanium alloys and the thickening of anodized films. Poor, so the thickness of the anodized film is not ideal at the same voltage; due to the microstructural defects on the surface of the titanium alloy, and the above three types of oxidizing solution can change the composition of the anodized film, improve the quality of the anodized film, and improve the quality of the anodized film. The promotion effect of anti-pitting corrosion ability is weak, so the anodic oxide film on the surface of titanium alloy is bound to have certain defects, and the performance of the anodic oxide film is poor, which in turn affects the protection of the anodic oxide film on the surface of titanium alloy

Method used

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  • Titanium alloy electrochemical oxidation liquid
  • Titanium alloy electrochemical oxidation liquid
  • Titanium alloy electrochemical oxidation liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Slowly add 180g of sulfuric acid into 540g of water along the wall of the glass container and stir while adding to form an acid solution; dissolve 50g of cerium sulfate in 225g of water and stir until completely dissolved to form a cerium salt solution; then slowly add the acid solution to the cerium salt In the solution, stir continuously to form a mixed solution; add 5 g of sodium dodecylbenzenesulfonate to the mixed solution, and stir until uniform to obtain the required 1 Kg electrochemical oxidation solution of the present titanium alloy.

[0023] see figure 1 , figure 2 , compared to figure 1 For the anodized film on the surface of medium titanium alloy, figure 2 The compactness of the anodized film on the surface of the medium-titanium alloy is improved and the defects are less. right figure 2 The anodized film on the surface of the titanium alloy is analyzed by energy spectrum, and the results are: Ti 27% (atom), O 60% (atom), Ce 10% (atom), and other ele...

Embodiment 2

[0028] Slowly add 190g of hydrochloric acid into 570g of water along the wall of the glass container and stir while adding to form an acid solution; dissolve 70g of cerium nitrate in 164g of water and stir until completely dissolved to form a cerium salt solution; then slowly add the acid solution to the cerium salt In the solution, stir continuously to form a mixed solution; add 6 g of sodium dodecylbenzenesulfonate to the mixed solution, and stir until uniform to obtain the required 1 Kg electrochemical oxidation solution of the present titanium alloy.

[0029] see Figure 4 , Figure 5 , at the same film-forming voltage, Figure 4 The thickness of anodized film on the surface of medium titanium alloy is less than one micron, while Figure 5 The thickness of the anodized film on the surface of the titanium alloy is more than two microns. It can be seen that, Figure 5 The thickness of the anodized film on the surface of the medium-titanium alloy has been significantly incre...

Embodiment 3

[0031] Slowly add 200g of citric acid into 600g of water along the wall of the glass container and stir while adding to form an acid solution; dissolve 90g of cerium sulfate in 102g of water and stir until completely dissolved to form a cerium salt solution; then slowly add the acid solution to the cerium In the salt solution, stir continuously to form a mixed solution; add 8 g of sodium dodecylbenzenesulfonate to the mixed solution, stir until uniform, and obtain the required 1Kg electrochemical oxidation solution of the present titanium alloy.

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Abstract

The invention relates to a titanium alloy electrochemical oxidation liquid. Every 1 kg of titanium alloy electrochemical oxidation liquid includes the following components: 180-200 g of inorganic acid or organic acid, 50-90 g of cerium salt, 5-8 g of surface active agent and the balance water, wherein the inorganic acid is any one of hydrochloric acid, sulfuric acid and nitric acid, the organic acid is any one of citric acid, carboxylic acid, sulfo acid, sulfinic acid and thionothiolic acid, the cerium salt is any one of cerous sulfate and cerium nitrate, and the surface active agent is sodium dodecyl benzene sulfonate. The titanium alloy electrochemical oxidation liquid has the advantages that the thickening of the titanium alloy surface anodic oxide film is favorable when anode oxidation is performed to the titanium alloy by adopting the titanium alloy electrochemical oxidation liquid, and the performance of the anodic oxide film can be enhanced.

Description

technical field [0001] The invention relates to an oxidizing solution, in particular to an electrochemical oxidizing solution for treating the surface of titanium alloy. Background technique [0002] Titanium alloy is a special metal material with light weight, high strength and strong corrosion resistance. be widely used. The thickness of the natural passivation film of titanium alloy is only tens of angstroms, and its corrosion resistance to strong oxidizing medium or reducing medium, as well as its flame retardancy and wear resistance are all limited. Therefore, before applying titanium alloy, it should be surface treated. The most convenient method is electrochemical oxidation, that is, anodic oxidation. [0003] Titanium alloys need to be pre-treated before anodizing, such as degreasing, and then enter the anodizing tank, place the titanium alloy on the anode, use titanium plates as the cathode, connect the power supply and heating device, and control the temperature...

Claims

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Application Information

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IPC IPC(8): C25D11/26
Inventor 吴昊
Owner 吴昊
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