阅读说明：本技术 一种含钌锆合金腐蚀剂及腐蚀方法 (Ruthenium-containing zirconium alloy corrosive and corrosion method ) 是由 张天广 李刚 李献军 张梦霓 李小影 王文倩 佟昕昕 童龙刚 王家斌 赵旭东 李 于 2020-06-22 设计创作，主要内容包括：本申请提供一种含钌锆合金腐蚀剂及腐蚀方法,其中,一种含钌锆合金腐蚀剂,组分包括:双氧水,硝酸,氢氟酸,盐酸,其中,双氧水、硝酸、氢氟酸和盐酸的体积配比为8-12：34-40：2-4：2-5；双氧水的含量≥30％,硝酸的含量为65-68％,氢氟酸的含量为≥40％,盐酸的含量为36-38％。本发明采用一定比例的双氧水、硝酸、氢氟酸和盐酸配置的含钌锆合金腐蚀剂,有效的解决了现有锆合金腐蚀剂对含钌锆合金腐蚀的干扰。本发明的腐蚀方法,可以得到清洗和准确的含钌锆合金清晰的金相组织,并且组织取向明显,能够准确的进行区分α相和β相,解决了现有锆合金腐蚀剂对含钌锆合金无法腐蚀出清晰晶粒组织,无法区分α相和β相的问题。(The application provides a ruthenium-containing zirconium alloy corrosive and a corrosion method, wherein the ruthenium-containing zirconium alloy corrosive comprises the following components in parts by volume: 34-40: 2-4: 2-5; the content of hydrogen peroxide is more than or equal to 30 percent, the content of nitric acid is 65 to 68 percent, the content of hydrofluoric acid is more than or equal to 40 percent, and the content of hydrochloric acid is 36 to 38 percent. The ruthenium-containing zirconium alloy corrosive agent prepared by hydrogen peroxide, nitric acid, hydrofluoric acid and hydrochloric acid in a certain proportion effectively solves the problem that the existing zirconium alloy corrosive agent interferes with the corrosion of the ruthenium-containing zirconium alloy. The corrosion method can obtain a clean and accurate clear metallographic structure of the ruthenium-containing zirconium alloy, has obvious structure orientation, can accurately distinguish the alpha phase from the beta phase, and solves the problems that the existing zirconium alloy corrosive can not corrode the ruthenium-containing zirconium alloy to obtain a clear grain structure and can not distinguish the alpha phase from the beta phase.)

1. A ruthenium-containing zirconium alloy etchant, comprising:

hydrogen peroxide solution is added to the mixture of the hydrogen peroxide solution,

the nitric acid is used for the reaction of nitric acid,

the hydrofluoric acid is added into the mixture of the hydrofluoric acid,

hydrochloric acid, wherein the acid is selected from the group consisting of,

the volume ratio of the hydrogen peroxide to the nitric acid to the hydrofluoric acid to the hydrochloric acid is 8-12: 34-40: 2-4: 2-5;

the content of the hydrogen peroxide is more than or equal to 30 percent, the content of the nitric acid is 65-68 percent, the content of the hydrofluoric acid is more than or equal to 40 percent, and the content of the hydrochloric acid is 36-38 percent.

2. A method of etching a ruthenium-containing zirconium alloy, comprising:

wiping and etching a sample of the ruthenium-containing zirconium alloy with the ruthenium-containing zirconium alloy etchant of claim 1 for a first predetermined time.

3. The etching method according to claim 2,

the first preset time is 10-25 s.

4. The etching method of claim 2, further comprising:

cleaning the ruthenium-containing zirconium alloy sample after wiping corrosion,

and anodizing the cleaned ruthenium-containing zirconium alloy sample for a second preset time.

5. The etching method according to claim 4, wherein the cleaning of the etched ruthenium-containing zirconium alloy sample comprises:

carrying out first flushing for a third preset time on the ruthenium-containing zirconium alloy sample subjected to wiping corrosion;

carrying out ultrasonic cleaning on the ruthenium-containing zirconium alloy sample subjected to the first washing for a fourth preset time;

and carrying out second washing for a third preset time on the ruthenium-containing zirconium alloy sample subjected to ultrasonic washing.

6. The etching method of claim 5, further comprising:

and spraying absolute ethyl alcohol on the ruthenium-containing zirconium alloy sample after the first washing for a third preset time and the second washing for a third preset time on the ruthenium-containing zirconium alloy sample after the ultrasonic cleaning respectively, and then drying.

7. The etching method according to any one of claims 4 to 6,

the second preset time is 10-20 s.

8. The corrosion method according to any one of claims 4 to 7, wherein anodizing conditions for anodizing the ruthenium-containing zirconium alloy sample comprise:

the voltage is 38V-40V,

the current is 0.05A-0.6A,

the cathode material is stainless steel.

9. The etching method according to any one of claims 4 to 8, further comprising:

and after the anode of the ruthenium-containing zirconium alloy is anodized, observing the ruthenium-containing zirconium alloy after the color of the corrosion surface of the ruthenium-containing zirconium alloy is changed into blue.

10. The etching method according to claim 5 or 6,

the third preset time is 15-40s,

the fourth preset time is 40-60 s.

Technical Field

The invention relates to the technical field of zirconium alloy corrosion, in particular to a ruthenium-containing zirconium alloy corrosive and a corrosion method.

Background

The metallographic structure analysis of the ruthenium-containing zirconium alloy is a necessary basic means for material detection, and plays a significant role in material process, performance research and application performance research. The metallographic corrosive agent and the corresponding corrosion method are the most important and most common means for displaying the structure in metallographic structure detection and analysis, but for the zirconium alloy added with ruthenium for the first time, the component difference between the zirconium alloy and the existing industrial zirconium alloys (Zr-1 and Zr-3) is larger, the existing corrosive agent and the corrosion method cannot obtain a clear and accurate metallographic structure, the number of false images is more, and misjudgment is easy to occur. Therefore, it is necessary to research a corrosive agent and a corrosion method for ruthenium-containing zirconium alloy, which can obtain a clear and accurate metallographic structure after the ruthenium-containing zirconium alloy is corroded.

Disclosure of Invention

Objects of the invention

The invention aims to provide a corrosive agent and a corrosion method capable of obtaining a clear and accurate metallographic structure.

(II) technical scheme

In order to solve the problems, the first aspect of the invention provides a ruthenium-containing zirconium alloy corrosive, which comprises the following components in parts by volume: 34-40: 2-4: 2-5; the content of the hydrogen peroxide is more than or equal to 30 percent, the content of the nitric acid is 65-68 percent, the content of the hydrofluoric acid is more than or equal to 40 percent, and the content of the hydrochloric acid is 36-38 percent.

According to another aspect of the present invention, there is also provided a method for etching a ruthenium-containing zirconium alloy, including: and wiping and corroding the ruthenium-containing zirconium alloy sample for a first preset time by using the ruthenium-containing zirconium alloy corrosive of the technical scheme.

Further, the first preset time is 10s-25 s.

Further, still include: and cleaning the ruthenium-containing zirconium alloy sample after being wiped and corroded, and anodizing the cleaned ruthenium-containing zirconium alloy sample for a second preset time.

Further, the cleaning the corroded ruthenium-containing zirconium alloy sample comprises: carrying out first flushing for a third preset time on the ruthenium-containing zirconium alloy sample subjected to wiping corrosion; carrying out ultrasonic cleaning on the ruthenium-containing zirconium alloy sample subjected to the first washing for a fourth preset time; and carrying out second washing for a third preset time on the ruthenium-containing zirconium alloy sample subjected to ultrasonic washing.

Further, still include: and spraying absolute ethyl alcohol on the ruthenium-containing zirconium alloy sample after the first washing for a third preset time and the second washing for a third preset time on the ruthenium-containing zirconium alloy sample after the ultrasonic cleaning respectively, and then drying.

Further, the second preset time is 10-20 s.

Further, the anodizing conditions for anodizing the ruthenium-containing zirconium alloy sample include: the voltage is 38V-40V, the current is 0.05A-0.6A, and the cathode material is stainless steel.

Further, still include: and after the anode of the ruthenium-containing zirconium alloy is anodized, observing the ruthenium-containing zirconium alloy after the color of the corrosion surface of the ruthenium-containing zirconium alloy is changed into blue.

Further, the third preset time is 15-40s, and the fourth preset time is 40-60 s.

(III) advantageous effects

The technical scheme of the invention has the following beneficial technical effects:

the ruthenium-containing zirconium alloy corrosive agent prepared by hydrogen peroxide, nitric acid, hydrofluoric acid and hydrochloric acid in a certain proportion effectively solves the problem that the existing zirconium alloy corrosive agent interferes with the corrosion of the ruthenium-containing zirconium alloy. The corrosion method provided by the invention comprises the steps of firstly corroding, then cleaning and finally carrying out anodic oxidation treatment, so that a clear metallographic structure of the cleaned ruthenium-containing zirconium alloy can be obtained, the structure orientation is obvious, the alpha phase and the beta phase can be accurately distinguished, and the problems that the existing zirconium alloy corrosive can not corrode the ruthenium-containing zirconium alloy to form a clear grain structure and can not distinguish the alpha phase and the beta phase are solved.

Drawings

FIG. 1 is a micrograph of a metallographic structure of a ruthenium-containing zirconium alloy after etching in example 3 under polarized light plus differential interference light;

FIG. 2 is a micrograph of a metallographic structure of the ruthenium-containing zirconium alloy after etching in example 5 under polarized light plus differential interference light;

FIG. 3 is a micrograph of a metallographic structure of the alloy containing ruthenium and zirconium obtained after etching in example 7 under polarized light plus differential interference light;

FIG. 4 is a micrograph of a metallographic structure of the alloy containing ruthenium and zirconium obtained after etching in example 8 under polarized light plus differential interference light;

FIG. 5 is a micrograph of a metallographic structure of the alloy containing ruthenium and zirconium obtained after etching in example 9 under polarized light plus differential interference light;

FIG. 6 is a micrograph of a metallographic structure of the Ru-Zr alloy of example 10 under polarized light plus differential interference light after etching;

FIG. 7 is a micrograph of a metallographic structure of the alloy containing ruthenium and zirconium obtained after etching in example 11 under polarized light plus differential interference light;

FIG. 8 is a micrograph of the metallographic structure of the ruthenium-containing zirconium alloy after etching in example 12 under polarized light plus differential interference light.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The described embodiments are only some, but not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The invention will be described in more detail below with reference to the accompanying drawings. The invention provides a ruthenium-containing zirconium alloy corrosive agent which comprises the components of hydrogen peroxide, nitric acid, hydrofluoric acid and hydrochloric acid. Wherein the volume ratio of the hydrogen peroxide to the nitric acid to the hydrofluoric acid to the hydrochloric acid is 8-12: 34-40: 2-4: 2-5. The content of hydrogen peroxide is more than or equal to 30 percent, the content of nitric acid is 65 to 68 percent, the content of hydrofluoric acid is more than or equal to 40 percent, and the content of hydrochloric acid is 36 to 38 percent. The components are directly mixed to obtain the metallographic corrosive containing the ruthenium-zirconium alloy.

According to another aspect of the present invention, there is also provided a method for etching a ruthenium-containing zirconium alloy, including: the ruthenium-containing zirconium alloy corrosive of the technical scheme is utilized to wipe and corrode a ruthenium-containing zirconium alloy sample for a first preset time.

In some embodiments, the first predetermined time is 10s-25 s.

In some embodiments, the method of etching a ruthenium-containing zirconium alloy further comprises: and cleaning the wiped and corroded ruthenium-containing zirconium alloy sample, and anodizing the cleaned ruthenium-containing zirconium alloy sample for a second preset time.

In some embodiments, the second predetermined time is 10s-20 s. For example, one of 10s, 11s, 12s, 13s, 14s, 15s, 16s, 17s, 18s, 19s, and 20 s.

Specifically, the cleaning of the corroded ruthenium-containing zirconium alloy sample comprises the following steps:

carrying out first flushing for a third preset time on the ruthenium-containing zirconium alloy sample subjected to wiping corrosion; carrying out ultrasonic cleaning for a fourth preset time on the ruthenium-containing zirconium alloy sample subjected to the first washing and rinsing; and carrying out second washing for a third preset time on the ruthenium-containing zirconium alloy sample subjected to ultrasonic washing.

In some embodiments, the third predetermined time is 15-40 s. For example, one of 15s, 20s, 25s, 30s, 35s, and 45 s.

In some embodiments, the fourth predetermined time is 40s-60 s. For example, 40s, 42s, 44s, 46s, 48s, 50s, 52s, 54s, 56s, 58s, and 60 s.

In some embodiments, an anodizing solution is used to perform anodization on a ruthenium-containing zirconium alloy sample, wherein one portion of the anodizing solution is prepared from the following components: 60ml of ethanol, 35ml of water, 20ml of glycerol, 10ml of lactic acid, 5ml of phosphoric acid and 2g of citric acid.

In some embodiments, the anodizing conditions for anodizing the ruthenium-containing zirconium alloy sample comprise: the voltage is 38V-40V, the current is 0.05A-0.6A, and the cathode material is stainless steel.

In some embodiments, the method of etching a ruthenium-containing zirconium alloy further comprises:

and spraying absolute ethyl alcohol on the ruthenium-containing zirconium alloy sample after the first washing for a third preset time and the second washing for a third preset time on the ruthenium-containing zirconium alloy sample after the ultrasonic cleaning respectively, and drying. The operation is dried fast like this to do not have water stain or spot, the later stage can not influence and observe the tissue.

In some embodiments, the method of etching a ruthenium-containing zirconium alloy further comprises: after the ruthenium-containing zirconium alloy was anodized, the color of the etched surface of the ruthenium-containing zirconium alloy was observed after changing to blue.

The technical solution of the present application is described in detail below according to specific embodiments.

Example 1

In this embodiment, the etchant for ruthenium-containing zirconium alloy includes 8ml of hydrogen peroxide, 38ml of nitric acid, 3ml of hydrofluoric acid, and 4ml of hydrochloric acid. The ruthenium-containing zirconium alloy corrosive in the embodiment is used for corroding the ruthenium-containing zirconium alloy, and the corrosion method at least comprises the following steps:

grinding and polishing the surface of the ruthenium-containing zirconium alloy to obtain a ground surface;

dipping a ruthenium-containing zirconium alloy corrosive agent by absorbent cotton to perform wiping corrosion on the grinding surface of the ruthenium-containing zirconium alloy, wherein the corrosion time is 20 s;

immediately carrying out first washing on the ruthenium-containing zirconium alloy subjected to wiping corrosion in flowing water, wherein the first washing time is 20 s;

placing the ruthenium-containing zirconium alloy subjected to the first washing in a solution containing a neutral washing solution for ultrasonic washing for 45 s;

carrying out secondary washing on the ruthenium-containing zirconium alloy subjected to ultrasonic cleaning by flowing water, wherein the secondary washing time is 20 s;

spraying absolute ethyl alcohol on the corroded surface of the ruthenium-zirconium alloy subjected to the secondary washing for the first time, and drying by cold air for the first time;

anodizing the corrosion surface of the ruthenium-containing zirconium alloy subjected to primary blow drying in an anodizing solution for 15 s. The specific anodic oxidation environment is as follows: the anodic oxidation voltage is 38V, the current is reduced from 0.4A to 0.05A, and the cathode material is stainless steel. Wherein one part of the anode oxidation liquid comprises 60ml of ethanol, 35ml of water, 20ml of glycerol, 10ml of lactic acid, 5ml of phosphoric acid and 2g of citric acid.

And (3) washing the corroded surface of the ruthenium-containing zirconium alloy subjected to anodic oxidation for the third time under flowing water, spraying absolute ethyl alcohol on the corroded surface of the ruthenium-containing zirconium alloy for the second time, and drying by cold air for the second time.

Example 2

In this embodiment, the etchant for ruthenium-containing zirconium alloy includes 12ml of hydrogen peroxide, 38ml of nitric acid, 3ml of hydrofluoric acid, and 4ml of hydrochloric acid. The ruthenium-containing zirconium alloy etchant in this example and the etching method in example 1 were used to etch the ruthenium-containing zirconium alloy.

Example 3

In this embodiment, the etchant for ruthenium-containing zirconium alloy includes 10ml of hydrogen peroxide, 34ml of nitric acid, 3ml of hydrofluoric acid and 4ml of hydrochloric acid. The ruthenium-containing zirconium alloy etchant in this example and the etching method in example 1 were used to etch the ruthenium-containing zirconium alloy.

Example 4

In this embodiment, the etchant for ruthenium-containing zirconium alloy includes 10ml of hydrogen peroxide, 40ml of nitric acid, 3ml of hydrofluoric acid, and 4ml of hydrochloric acid. The ruthenium-containing zirconium alloy etchant in this example and the etching method in example 1 were used to etch the ruthenium-containing zirconium alloy.

Example 5

In this embodiment, the etchant for ruthenium-containing zirconium alloy includes 10ml of hydrogen peroxide, 38ml of nitric acid, 2ml of hydrofluoric acid, and 4ml of hydrochloric acid. The ruthenium-containing zirconium alloy etchant in this example and the etching method in example 1 were used to etch the ruthenium-containing zirconium alloy.

Example 6

In this embodiment, the etchant for ruthenium-containing zirconium alloy includes 10ml of hydrogen peroxide, 38ml of nitric acid, 4ml of hydrofluoric acid and 4ml of hydrochloric acid. The ruthenium-containing zirconium alloy etchant in this example and the etching method in example 1 were used to etch the ruthenium-containing zirconium alloy.

Example 7

In this embodiment, the etchant for ruthenium-containing zirconium alloy includes 10ml of hydrogen peroxide, 38ml of nitric acid, 3ml of hydrofluoric acid, and 2ml of hydrochloric acid. The ruthenium-containing zirconium alloy etchant in this example and the etching method in example 1 were used to etch the ruthenium-containing zirconium alloy.

Example 8

In this embodiment, the etchant for ruthenium-containing zirconium alloy includes 10ml of hydrogen peroxide, 38ml of nitric acid, 3ml of hydrofluoric acid, and 5ml of hydrochloric acid. The ruthenium-containing zirconium alloy etchant in this example and the etching method in example 1 were used to etch the ruthenium-containing zirconium alloy.

Example 9

In this embodiment, the etchant for ruthenium-containing zirconium alloy includes 10ml of hydrogen peroxide, 38ml of nitric acid, 3ml of hydrofluoric acid, and 4ml of hydrochloric acid. The ruthenium-containing zirconium alloy etchant in this example and the etching method in example 1 were used to etch the ruthenium-containing zirconium alloy.

Example 10

In this embodiment, the etchant for ruthenium-containing zirconium alloy includes 10ml of hydrogen peroxide, 38ml of nitric acid, 3ml of hydrofluoric acid, and 4ml of hydrochloric acid. The ruthenium-containing zirconium alloy corrosive in the embodiment is used for corroding the ruthenium-containing zirconium alloy, and the corrosion method comprises the following steps:

grinding and polishing the surface of the ruthenium-containing zirconium alloy to obtain a ground surface;

dipping a ruthenium-containing zirconium alloy corrosive agent on absorbent cotton to wipe the ruthenium-containing zirconium alloy grinding surface, and wiping and corroding the ruthenium-containing zirconium alloy for 20 s;

immediately carrying out first washing on the ruthenium-containing zirconium alloy subjected to wiping corrosion in flowing water, wherein the first washing time is 20 s;

placing the ruthenium-containing zirconium alloy subjected to the first washing in a solution containing a neutral washing solution for ultrasonic washing for 45 s;

carrying out secondary washing on the ruthenium-containing zirconium alloy subjected to ultrasonic washing in flowing water, wherein the secondary washing time is 20 s;

and spraying absolute ethyl alcohol on the corroded surface of the ruthenium-containing zirconium alloy subjected to the secondary washing, and drying by using cold air.

Example 11

In this embodiment, the etchant for ruthenium-containing zirconium alloy includes 10ml of hydrogen peroxide, 3ml of hydrofluoric acid, and 4ml of hydrochloric acid. The ruthenium-containing zirconium alloy etchant in this example and the etching method in example 1 were used to etch the ruthenium-containing zirconium alloy.

Example 12

In this embodiment, the etchant for ruthenium-containing zirconium alloy includes 10ml of hydrogen peroxide, 38ml of nitric acid and 3ml of hydrofluoric acid. The ruthenium-containing zirconium alloy etchant in this example and the etching method in example 1 were used to etch the ruthenium-containing zirconium alloy.

As shown in table 1, the components and the corresponding ratios of the components of the ruthenium-containing zirconium alloy etchant in examples 1 to 12 of the present invention are shown, wherein examples 1 to 9 are experimental examples, and examples 10 to 12 are comparative examples.

TABLE 1

After the ruthenium-zirconium alloy was etched, the color of the etched surface of the ruthenium-zirconium-containing alloy was changed to blue, and the ruthenium-zirconium-containing alloy was observed under polarized light plus differential interference light at 400 times using a metallographic microscope. Wherein, the microscope preferably adopts a Zeiss inverted microscope.

The zirconium alloy has weak orientation difference among crystal grains, simple corrosion and unclear structural detail display, so that a layer of oxide film is formed on the surface to be detected through anodic oxidation, and the contrast among the crystal grains and the clear detailed display of the structure, inclusions and the like can be increased through the action of polarized light under a microscope. The details are most clear when the color of the corrosion surface (oxide film color) of the ruthenium-containing zirconium alloy is blue.

FIG. 1 is a micrograph of the metallographic structure of the ruthenium-containing zirconium alloy after etching in example 3 under polarized light plus differential interference light.

FIG. 2 is a micrograph of the metallographic structure of the ruthenium-containing zirconium alloy after etching in example 5 under polarized light plus differential interference light.

FIG. 3 is a micrograph of the metallographic structure of the ruthenium-containing zirconium alloy after etching in example 7 under polarized light plus differential interference light.

FIG. 4 is a micrograph of the metallographic structure of the ruthenium-containing zirconium alloy after etching in example 8 under polarized light plus differential interference light.

FIG. 5 is a micrograph of the metallographic structure of the ruthenium-containing zirconium alloy after etching in example 9 under polarized light plus differential interference light.

As shown in fig. 1 to 5, under polarized light + differential interference light, α -phase grains and β -phase grains are characterized by different orientations and different colors, and it can be observed that the grain boundaries of the α -phase grains and the β -phase grains are distinct, and the microstructure can be clearly seen. The beta-phase crystal grains are mainly precipitated at the trifurcate crystal boundary and the two crystal grain boundaries, and the color is yellow. Under polarized light and differential interference light, the two phases are slightly stereoscopic, so that the positions of crystal boundaries are convenient to distinguish, and meanwhile, the phase color difference is obvious and is easier to distinguish.

FIG. 6 is a micrograph of the metallographic structure of the Ru-Zr alloy of example 10 under polarized light plus differential interference light.

As shown in fig. 6, in example 10, the same etchant as in example 9 was used, but the etching method was different, only by the etching and cleaning steps, and no anodization treatment was performed, and when the alloy containing ruthenium and zirconium in example 10 was observed under polarized + differential interference light as it was, the crystal grain orientation of the α phase was similar, the crystal grain color was similar under polarized + differential interference light, part of the grain boundary could not be displayed, and when no anodization was performed, the contrast of the crystal grain was insufficient, and it could not be distinguished from the color, and the two phases had no three-dimensional appearance. Therefore, the α -phase crystal grains and the β -phase crystal grains in example 10 cannot be distinguished.

FIG. 7 is a micrograph of a metallographic structure of the Ru-Zr alloy of example 11 under polarized light plus differential interference light.

As shown in FIG. 7, the grain boundaries were not completely precipitated, and the artifacts such as corrosion black pits were observed.

FIG. 8 is a micrograph of the metallographic structure of the ruthenium-containing zirconium alloy after etching in example 12 under polarized light plus differential interference light.

As shown in fig. 8, the grain boundaries were not precipitated, the crystal grains were indistinguishable, the surface was embossed, and the α -phase crystal grains were indistinguishable from the β -phase crystal grains.

The technical scheme of the invention has the following beneficial technical effects:

the ruthenium-containing zirconium alloy corrosive agent prepared by hydrogen peroxide, nitric acid, hydrofluoric acid and hydrochloric acid in a certain proportion effectively solves the problem that the existing zirconium alloy corrosive agent interferes with the corrosion of the ruthenium-containing zirconium alloy. The corrosion method provided by the invention comprises the steps of firstly corroding, then cleaning and finally carrying out anodic oxidation treatment, so that a clear metallographic structure of the cleaned ruthenium-containing zirconium alloy can be obtained, the structure orientation is obvious, the alpha phase and the beta phase can be accurately distinguished, and the problems that the existing zirconium alloy corrosive can not corrode the ruthenium-containing zirconium alloy to form a clear grain structure and can not distinguish the alpha phase and the beta phase are solved.

The invention has been described above with reference to embodiments thereof. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the invention, and these alternatives and modifications are intended to be within the scope of the invention.