A kind of environment-friendly titanium alloy anodic oxidation pretreatment method

An anodic oxidation and titanium alloy technology, applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve the problems of strong skin irritation, environmental pollution, corrosion, etc., and achieve low cost, convenient operation, and solution composition simple effect
CN103305893BInactive Publication Date: 2015-09-16BEIHANG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2015-09-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an anodic oxidation pretreatment method for an environment-friendly titanium alloy. The anodic oxidation pretreatment method is characterized in that an anodic oxidation treatment solution is composed of chromotropic acid, oxalic acid and other substances. The pretreatment solution is formed by adding 1-5g of chromotropic acid and 5-10g of oxalic acid into 1L of deionized water. The anodic oxidation pretreatment method disclosed by the invention comprises the steps of: ultrasonic cleaning; alkali washing and oil removing; pretreatment; and deionized water cleaning. The anodic oxidation pretreatment method disclosed by the invention is used for effectively reducing the damage of strong acidic materials such as hydrofluoric acid, nitric acid and the like introduced to the current anodic oxidation pretreatment process to human bodies and the environment and effectively improving the condition of high treatment difficulty of wastes on the premise of ensuring the surface activation, the smooth finish and the subsequent anodic oxidation filming effect. The anodic oxidation pretreatment method for the environment-friendly titanium alloy is convenient to operate, simple in process, stable in component and easy to detect, and new concepts of green and safe production and sustainable development are realized.
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Description

Technical field

[0001] The invention relates to a titanium alloy anodic oxidation pretreatment method, in particular to a titanium alloy anodic oxidation pretreatment method under safe and environmentally friendly conditions, and belongs to the technical field of titanium alloy surface treatment. Background technique

[0002] Titanium and titanium alloys have many excellent properties such as high specific strength, strong heat resistance, and corrosion resistance, and have important applications in aerospace, biomedical and other fields. A natural oxide film will be formed on the surface of the titanium alloy. The natural oxide film and pollution layer on the surface of the titanium alloy must be removed before anodizing to obtain a smooth and clean activated surface for the subsequent anodizing step. At present, most of the pretreatment solutions for titanium alloy anodization contain hydrofluoric acid. Hydrofluoric acid is strongly irritating and corrosive to the skin. Hydrofl...

Claims

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