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Titanium alloy micro-arc oxidation electrolyte and method and product thereof

A micro-arc oxidation, titanium alloy technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of cumbersome process and achieve the effect of simple preparation process, good oxidation resistance and high hardness

Inactive Publication Date: 2019-09-10
华孚精密科技(马鞍山)有限公司
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  • Application Information

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Problems solved by technology

Comparative document 2 Chinese patent document 201310029887.2 discloses a method for preparing a black high-temperature oxidation-resistant coating on the surface of titanium alloys: adding aluminum alloy powder and alumina powder to the electrolyte for micro-arc oxidation; using this method requires chemicals and pure aluminum powder It can be prepared and used after modification, and the process is relatively cumbersome

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  • Titanium alloy micro-arc oxidation electrolyte and method and product thereof
  • Titanium alloy micro-arc oxidation electrolyte and method and product thereof
  • Titanium alloy micro-arc oxidation electrolyte and method and product thereof

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Embodiment Construction

[0027] The following preferred examples are given with respect to the present invention.

[0028] The sample made of TC4 titanium alloy is selected as the material. Then the sample is fully degreased and degreased, and the sample is placed in a cleaning agent mixed with acetone and absolute ethanol for ultrasonic cleaning for 5-10 minutes. Then put it into an oven, and dry the sample at a temperature of 150°C for later use.

[0029] Configuration micro-arc oxidation electrolyte, the present embodiment selects 20g / L sodium silicate and 8g / L sodium phosphate, the consumption ratio of the two is 0.8:1, after mixing, add the film-forming aid potassium fluoride of 10g / L, and Add 15g / L of sodium hydroxide to adjust the pH of the electrolyte to above 12. Finally, add coloring additives, namely 10g / L ammonium vanadate and 20g / L hexamethylenetetramine, the dosage ratio is 1:2.5. Mix and stir evenly to prepare a micro-arc oxidation electrolyte.

[0030] The micro-arc oxidation power...

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Abstract

The invention relates to the technical field of micro-arc oxidation, in particular to titanium alloy micro-arc oxidation electrolyte and method and a product thereof. The titanium alloy micro-arc oxidation electrolyte comprises 10-25 g / L of sodium silicate, 5-10 g / L of sodium phosphate, 12-15 g / L of alkaline conditioning agent, 5-10 g / L of film forming auxiliary, 8-12 g / L of ammonium vanadate, and15-20 g / L of organic ammonium salt; and solvents are de-ionized water. The titanium alloy micro-arc oxidation method comprises the following steps: (1) the micro-arc oxidation electrolyte is prepared; (2) a micro-arc oxidation power supply is arranged; (3) the micro-arc oxidation is performed with a titanium alloy sample as an anode and with a stainless steel plate as a cathode; and (4) the titanium alloy sample is cleaned and dried. Compared with the prior art, the titanium alloy micro-arc oxidation electrolyte has no need to additionally feed aluminum oxide powder, needs no vacuum heating,and can be directly used as the titanium alloy micro-arc oxidation electrolyte; and an obtained compact black ceramic film layer is high in hardness, excellent in scratch resistance, high in salt mistresistance, excellent in oxidation resistance and suitable for batch operation.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of micro-arc oxidation, in particular to a titanium alloy micro-arc oxidation electrolyte, a method and a product thereof. [0003] 【Background technique】 [0004] Titanium is an important structural metal developed in the 1950s. Titanium alloys have high strength, good corrosion resistance, and high heat resistance. They are widely used in the fields of aerospace industry, chemical industry, and medical engineering. . Micro-arc oxidation or micro-plasma surface ceramization technology refers to the use of arc discharge to enhance and activate the reaction on the anode on the basis of ordinary anodic oxidation, so that aluminum, titanium, magnesium and their alloys are used as materials A method for forming a high-quality reinforced ceramic film on the surface of a workpiece. Therefore, the preparation of black ceramic film on the surface of titanium alloy by micro-arc oxidation has become an impor...

Claims

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Application Information

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IPC IPC(8): C25D11/26
CPCC25D11/024C25D11/026C25D11/26
Inventor 李连成
Owner 华孚精密科技(马鞍山)有限公司
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