Unlock instant, AI-driven research and patent intelligence for your innovation.

Metallographic etchant of pure titanium and etching method thereof

A technology of metallographic corrosion and corrosion solution, which is applied in the field of metallographic corrosion solution of pure titanium, can solve problems such as blurred grain boundaries, localized corrosion, and grain size of difficult samples, and achieve clear metallographic structure and stable corrosion process , The effect that the grain boundary is easy to distinguish and analyze

Pending Publication Date: 2019-01-11
广东省科学院工业分析检测中心
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the solution of the single-step corrosion method is highly corrosive, the corrosion time is not easy to control, and it is easy to cause insufficient corrosion, over-corrosion or localized corrosion, resulting in unclear microstructure of the corroded metallographic sample, blurred grain boundaries, and difficult to accurately calculate. Grain size of the sample
Therefore, the existing corrosion solution and corrosion method of pure titanium metallographic samples still need to be improved and developed.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Metallographic etchant of pure titanium and etching method thereof
  • Metallographic etchant of pure titanium and etching method thereof
  • Metallographic etchant of pure titanium and etching method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The metallographic corrosion solution of pure titanium includes corrosion solution A and corrosion solution B. The corrosion solution A is composed of the following volume percentage components: 5% hydrofluoric acid, 10% nitric acid, and the rest is water; the corrosion solution B is composed of the following volume Percent composition of components: 50% hydrofluoric acid, the rest is water.

[0025] The hydrofluoric acid is composed of the following components in volume percentage: 50% HF, and the rest is water.

[0026] The nitric acid consists of the following components by volume: 67% HNO 3 , and the rest is water.

[0027] The metallographic corrosion method of pure titanium comprises the following steps:

[0028] Step 1: Corrode the pure titanium sample with corrosion solution A for 60 seconds, then rinse the pure titanium sample with water and dry it;

[0029] Step 2: Corrode the pure titanium sample with corrosion solution B for another 5 seconds, then rinse ...

Embodiment 2

[0031] The metallographic corrosion solution of pure titanium includes corrosion solution A and corrosion solution B. The corrosion solution A is composed of the following volume percentage components: 4% hydrofluoric acid, 12% nitric acid, and the rest is water; the corrosion solution B is composed of the following volume Percent composition of components: 55% hydrofluoric acid, the rest is water.

[0032] The hydrofluoric acid is composed of the following components by volume percentage: 35% HF, and the rest is water.

[0033] The nitric acid consists of the following components by volume: 68% HNO 3 , and the rest is water.

[0034] The metallographic corrosion method of pure titanium comprises the following steps:

[0035] Step 1: Corrode the pure titanium sample with corrosion solution A for 55 seconds, then rinse the pure titanium sample with water and dry it;

[0036] Step 2: Corrode the pure titanium sample with corrosion solution B for another 6 seconds, then rinse ...

Embodiment 3

[0038] The metallographic corrosion solution of pure titanium includes corrosion solution A and corrosion solution B. The corrosion solution A is composed of the following volume percentage components: 6% hydrofluoric acid, 8% nitric acid, and the rest is water; the corrosion solution B is composed of the following volume Percent composition of components: 45% hydrofluoric acid, the rest is water.

[0039] The hydrofluoric acid is composed of the following components in volume percentage: 45% HF, and the rest is water.

[0040] The nitric acid consists of the following components by volume: 65% HNO 3 , and the rest is water.

[0041] The metallographic corrosion method of pure titanium comprises the following steps:

[0042] Step 1: Corrode the pure titanium sample with corrosion solution A for 65 seconds, then rinse the pure titanium sample with water and dry it;

[0043] Step 2: Corrode the pure titanium sample with corrosion solution B for another 4 seconds, then rinse t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a metallographic etchant of pure titanium and an etching method thereof. The metallographic etchant comprises an etchant A and an etchant B, wherein the etchant A is composed ofthe following components by volume percent: 4% to 6% of hydrofluoric acid and 8% to 12% of nitric acid, and the balance being water; and the etchant B is composed of the following components by volume percent: 45% to 55% of hydrofluoric acid, and the balance being water. The metallographic etching method comprises the following steps of step I, etching a pure titanium specimen with the etchant Afor 55 to 65 s, then, washing the pure titanium specimen with water, and blow-drying the washed pure titanium specimen; and step II, etching the pure titanium specimen with the etchant B for 4 to 6 s,then, washing the pure titanium specimen with water in 2 seconds, and blow-drying the washed pure titanium specimen after cleaning, so as to obtain a pure titanium metallographic specimen. Accordingto the metallographic etchant of pure titanium and the etching method thereof, the metallographic structure of the pure titanium metallographic specimen prepared through the etching method is clear, grain boundaries are easy to discriminate, the etching process is stable, and etching time is easy to control.

Description

technical field [0001] The invention belongs to the technical field of metallographic preparation, and in particular relates to a metallographic etching solution for pure titanium and an etching method thereof. Background technique [0002] The corrosion effect of metallographic samples is a key factor in metallographic structure analysis and defect analysis. In general, the mechanical properties (strength, ductility, and toughness) of fine-grained metals are always superior to those of coarse-grained metals. Therefore, it is sometimes very important to accurately calculate the grain size of metallographic samples of metal materials. In polycrystals, due to the different orientations of crystal grains, there are interfaces between crystal grains, which are called grain boundaries. Since the grain boundary connects the grains with different arrangement directions, and transits from one arrangement direction to another arrangement direction, the arrangement of atoms at the g...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23F1/26G01N1/32
CPCC23F1/26G01N1/32
Inventor 马文花伍超群邝宏聪陈文陈颖欣
Owner 广东省科学院工业分析检测中心