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Electrochemical polishing electrolyte and polishing method for titanium and titanium alloy

An electrochemical and titanium alloy technology, applied in the field of electrochemical polishing electrolyte and polishing, can solve the problems of difficult large-scale application under low temperature conditions, easy corrosion on the surface of the sample, difficulty in obtaining polishing effect, etc. Good specular effect, avoid low temperature and relatively high voltage or high current effect

Active Publication Date: 2017-04-19
DABO MEDICAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conditions are relatively harsh, and it is difficult to realize large-scale application in industry
[0006] In the traditional electrochemical polishing of titanium and titanium alloys, toxic and harmful or low temperature (below 0°C) and relatively high voltage or high current processes are often used. This type of electrochemical polishing method has low operability and low safety factor. Samples The surface is prone to defects such as erosion, pitting and flow marks, and it is difficult to achieve a satisfactory polishing effect. At the same time, it is difficult to achieve large-scale industrial application under low temperature conditions

Method used

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  • Electrochemical polishing electrolyte and polishing method for titanium and titanium alloy
  • Electrochemical polishing electrolyte and polishing method for titanium and titanium alloy
  • Electrochemical polishing electrolyte and polishing method for titanium and titanium alloy

Examples

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Embodiment 1

[0045] In this embodiment, the electrochemical polishing electrolyte and the polishing method thereof of the present invention are used to electrochemically polish the surface of the titanium alloy, and the Zeiss sigma high-resolution scanning electron microscope of German Zeiss Company is used to observe the microscopic surface morphology of the titanium alloy. The specific steps as follows:

[0046] S1. Pretreatment: Polish the titanium alloy with a size of 10mm×10mm×2mm with metallographic sandpaper of 320 mesh, 500 mesh, 800 mesh, 1500 mesh and 2000 mesh in sequence, then wash it with deionized water and dry it; figure 1 is the SEM image of titanium alloy after pretreatment, from figure 1 Scratches left by hand polishing can be clearly seen in the middle;

[0047] S2. Surface degreasing and pickling treatment: Ultrasonic degreasing is performed on the product of S1 with acetone solution, then cleaned with deionized water, then pickled in a mixed solution of nitric acid an...

Embodiment 2

[0052] In this embodiment, the electrochemical polishing electrolyte and polishing method thereof of the present invention are used to electrochemically polish the surface of pure titanium, and the surface microscopic appearance of pure titanium is observed with a Zeiss sigma high-resolution scanning electron microscope from Zeiss, Germany. The specific steps as follows:

[0053] S1. Pretreatment: Polish the pure titanium with a size of 10mm×10mm×2mm with metallographic sandpaper of 320 mesh, 500 mesh, 800 mesh, 1500 mesh and 2000 mesh in sequence, then wash it with deionized water and dry it; Figure 7 is the SEM picture of pure titanium after pretreatment, from Figure 7 Scratches left by hand polishing can be clearly seen in the middle;

[0054] S2. Surface degreasing and pickling treatment: Ultrasonic degreasing is performed on the product of S1 with alcohol solution, then cleaned with deionized water, then pickled in a mixed solution of nitric acid and hydrofluoric acid,...

Embodiment 3

[0059] In this embodiment, the electrochemical polishing electrolyte and the polishing method thereof of the present invention are used to electrochemically polish the surface of the titanium alloy, and the Zeiss sigma high-resolution scanning electron microscope of German Zeiss Company is used to observe the microscopic surface morphology of the titanium alloy. The specific steps as follows:

[0060] S1. Pretreatment: Polish the titanium alloy with a size of 10mm×10mm×2mm with metallographic sandpaper of 320 mesh, 500 mesh, 800 mesh, 1500 mesh and 2000 mesh in sequence, then wash it with deionized water and dry it;

[0061] S2. Surface degreasing and pickling treatment: Ultrasonic degreasing is performed on the product of S1 with acetone solution, then cleaned with deionized water, then pickled in a mixed solution of nitric acid and hydrofluoric acid, and then cleaned with deionized water , blow dry; the surface of the treated titanium alloy is uneven, and the roughness is 46...

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Abstract

The invention discloses an electrochemical polishing electrolyte and polishing method for titanium and a titanium alloy. The electrolyte comprises, by mass percentage, 10%-90% of corrodent, 1%-5% of an additive, 1%-5% of a polynitrogen compound and the balance water. The electrochemical polishing method comprises the following steps of pretreatment, surface oil removal and acid pickling treatment, electrolyte compounding, electrochemical polishing treatment and aftertreatment. The electrochemical polishing electrolyte is simple in formula, stable in performance, long in service life, low in price and capable of being used cyclically for multiple times; reaction conditions such as the low temperature or the relatively high voltage or the large current are not needed; and the electrochemical polishing electrolyte is more suitable for large-scale industrialized production. The surface reflectivity of a finished workpiece obtained through the electrochemical polishing method ranges from 70% to 95%, and surface roughness Ra is smaller than 0.05 micron.

Description

technical field [0001] The invention relates to an electrochemical polishing electrolyte and a polishing method thereof, in particular to an electrochemical polishing electrolyte of titanium and titanium alloys and a polishing method thereof. Background technique [0002] Due to their good physical, chemical and biological properties, titanium and titanium alloys are more and more widely used in the fields of medical equipment, chemical machinery, aerospace and even daily necessities. Surface polishing can improve the decorative and Corrosion resistance, wear resistance, etc. are of great significance. [0003] In order to achieve a smooth and bright titanium surface, the commonly used polishing methods include mechanical polishing and chemical polishing. However, these methods have some defects and deficiencies. For example, mechanical polishing requires multi-station mechanical polishing devices and power, and material friction loss Large, manual or automatic operation re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/26
CPCC25F3/26
Inventor 陈艳文周正荣林志雄
Owner DABO MEDICAL TECH CO LTD
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