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End voltage method titanium alloy anode oxidizing process

An anodizing, titanium alloy technology, applied in the formation of titanium alloy thin-layer sulfuric acid type anodizing film, titanium alloy anodizing surface treatment technology field, can solve the problems of reducing the adhesion of paint layer, pulverization, complex process conditions and so on , to achieve the effect of reducing one-time investment, reducing production cost and simple process operation

Inactive Publication Date: 2005-05-04
XIAN AIRCRAFT IND GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The disadvantages of the existing technology are: the process needs to be equipped with a special power supply with a gradual boost within a certain period of time, and a dedicated production line is established, which increases the production cost of anodizing titanium alloys and complicates the process conditions; at the same time, such process conditions still cannot fully guarantee part The quality requirements of the product, the thickness of the thin-layer oxide film is extremely uneven, it is easy to cause loosening and powdering of the film layer, and there is floating dust on the surface, which reduces the bonding force with the paint layer, and it is difficult to meet the quality standard. For some grades of titanium This problem is more prominent in alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: In an 8-meter aluminum alloy anodizing production line, the power supply equipment equipped is a general-purpose thyristor stabilized voltage and current power supply. The anodizing process conditions are: the bath composition sulfuric acid 188g / L, the temperature 18°C, and the final setting The voltage is 24 volts, and the duration of anodizing is 6 minutes. Other processes and conditions are the same as the titanium alloy anodizing process in the prior art; the material of the parts is TC1-M-δ1, and the size is 135×210; the oxidation result is: the surface color is blue, the film The layer thickness is 2.2μm, the appearance of the film layer is firm and dense, and the test results are qualified in the dry and wet tape tests.

Embodiment 2

[0018] Example 2: In an 8-meter aluminum alloy anodizing production line, the power supply equipment is a general-purpose thyristor stabilized voltage and current power supply. The anodizing process conditions are: bath composition sulfuric acid 188g / L, temperature 19°C, set final voltage 18 volts, the duration of anodic oxidation is 15 minutes, and other processes and conditions are the same as the anodic oxidation process of titanium alloys in the prior art; the material of the parts is TC1-M-δ1, and the size is 135×210; the oxidation result is: the surface color is blue, and the thickness of the film layer 3.3μm, the appearance of the film layer is firm and dense, and the test results are qualified in the dry and wet tape tests.

Embodiment 3

[0019] Example 3: In a 6-meter titanium alloy anodizing production line, the power supply equipment equipped is a general-purpose thyristor stabilized voltage and current power supply. The anodizing process conditions are: bath composition sulfuric acid 208g / L, temperature 16°C, set final The voltage is 22 volts, and the duration of anodizing is 4 minutes. Other processes and conditions are the same as the titanium alloy anodizing process in the prior art; the material of the parts is TC3-M-δ1, and the size is 158×100; the oxidation result is: the surface color is blue, the film The layer thickness is 3.3μm, the appearance of the film layer is firm and dense, and the test results are qualified in the dry and wet tape tests.

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PUM

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Abstract

This invention is about a kind of craftwork in anodicoxidation surface treatment of titanium alloy, it is particularly suitable to forming sulphuric acid anodizing film of the thin layer of the titanium alloy. This anodicoxidation craftwork of the titanium alloy by terminal voltage has such characteristics, when the anodizing process being performed, the applied voltage need not to upgrade, rather, the anode voltage-terminal voltage should be set at one time in operating the craftwork, thus the oxide film is formed by a constant pressure under the anode voltage of the terminal voltage. This craftwork has an obvious effect upon anodizing the blue thin layer of the TC1 titanium alloy. It can meet the requirements in performance and quality and doesn't need any special power supply and can produce the titanium alloy parts in the common anodizing manufacturing line of A-alloy.

Description

technical field [0001] The invention relates to a titanium alloy anodic oxidation surface treatment process, which is particularly suitable for the formation of a titanium alloy thin-layer sulfuric acid type anodic oxidation film, and belongs to the technical field of metal surface treatment anodic oxidation. Background technique [0002] Titanium is a metal with extremely active chemical properties and has a high affinity for oxygen. However, it can naturally form a very thin layer (thickness about 0.005-0.015μm) of oxide protective film in the atmospheric environment. This protective film is usually very stable and is in a passivation state in many corrosive media. In addition, even if the oxide film is damaged, it will be regenerated immediately (with a strong self-repairing ability), which plays a very good role in protecting the titanium metal substrate. Titanium alloys also have such excellent corrosion resistance in the atmosphere. [0003] However, when titanium or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26
Inventor 孟保利舒文刚
Owner XIAN AIRCRAFT IND GROUP