CN104593774B - A kind of magnesium alloy metallographic structure observational technique - Google Patents
A kind of magnesium alloy metallographic structure observational technique Download PDFInfo
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- CN104593774B CN104593774B CN201510036217.2A CN201510036217A CN104593774B CN 104593774 B CN104593774 B CN 104593774B CN 201510036217 A CN201510036217 A CN 201510036217A CN 104593774 B CN104593774 B CN 104593774B
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- magnesium alloy
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Abstract
A kind of magnesium alloy chemical corrosive agent, according to mass ratio, is dissolved in 100 parts of water by 10 15 parts of citric acids and 5 10 parts of gluconic acid and is made.The present invention is formulated using citric acid and gluconic acid, it is to avoid acid too strong；Prepared simultaneously using both weak acid mixing, hydrionic ionization is played a part of mutually promoting in gluconic acid and citric acid in solution, and then enhance the acidity of the corrosive agent prepared, it is to avoid and it is acid excessively weak, corrosion magnesium alloy can be used to and crystal boundary is shown.The chemical attack agent compounding method of the present invention is simple, using this chemical mordant, can quickly, clearly show the metallographic structure of magnesium alloy particularly heat treatment state magnesium alloy.
Description
Technical field
The present invention relates to the metallographic etching agent of technical field of metal material, specifically a kind of magnesium alloy metallographic group
Knit observational technique.
Background technology
Magnesium alloy is structural metallic materials most light in engineer applied, is particularly in the automotive industry in many application fields
With the incomparable advantage of other materials.During the research and development of magnesium alloy, difference, heat treatment due to material composition
The difference of technique, often obtains different types of metallographic structure, the performance of final alloy also difference.In order to needed for obtaining
The magnesium alloy wanted is, it is necessary to the metallographic structure to alloy is observed, and the composition of binding ability test data, in time adjustment alloy
And Technology for Heating Processing, with the proviso that realizing the display of tissue using suitable chemical mordant.
Generally, the chemical mordant of magnesium alloy is made up of nitric acid, hydrochloric acid, water etc., acid stronger, due to the corrosion resistant of magnesium alloy
Crystal boundary is difficult to corrosion clearly during corrosion energy extreme difference, etching pit, and etching time is difficult to control.Time is too short, and crystal boundary is difficult
Come out with corroding；Overlong time, often forms one layer of film-form oxide layer for being very difficult to remove on metallographic specimen surface, causes table
Face is smudgy, and second is mutually difficult to recognize, the observation and analysis to metallographic structure have a negative impact.In order to be carried out to magnesium alloy
Effective Metallographic Analysis, is clearly viewed materials microstructure form, it is necessary to be further improved to chemical mordant.
The content of the invention
To solve the problem of crystal boundary after existing Corrosion Behaviors of Magnesium Alloys agent corrosion is fuzzy to be difficult to identification, the present invention provides a kind of magnesium
Alloy microstructure observational technique, using this chemical mordant, can quickly, clearly show that magnesium alloy particularly heat treatment state magnesium is closed
The metallographic structure of gold.
The present invention is for the technical scheme that is used of solution above-mentioned technical problem：A kind of magnesium alloy metallographic structure watcher
Method, it is characterised in that comprise the following steps：
1）According to mass ratio, being made in 100 parts of water is dissolved in by 10-15 parts of citric acids and 5-10 parts of gluconic acid
Learn corrosive agent；
2）Magnesium alloy is polished and step 1 is immersed in）5-10 seconds in the chemical mordant of preparation, take out immediately and use alcohol
Rinse, dry after i.e. observable magnesium alloy metallographic structure.
Compared with existing metallographic etching agent, present invention tool has the advantage that and beneficial effect：
1st, the present invention uses weak acid（Citric acid, gluconic acid）Substitute strong acid（Nitric acid, hydrochloric acid）It is formulated, it is to avoid acid
Property it is too strong caused by problem of oxidation；Simultaneously using two kinds of weak acid mixing, the overall acid of corrosive agent is improved, so as to avoid metallographic
The problem of corrosion process is excessively slow；
2nd, it is hydrionic in gluconic acid and citric acid in the mixed acid that gluconic acid and citric acid of the present invention are mixed to form
Ionization is played a part of mutually promoting, and then enhances the acidity of the corrosive agent prepared, can be used to corrosion magnesium and close
Gold simultaneously shows crystal boundary；
3rd, each component of the invention is conventional commercially available chemical reagent, and compound method is simple, proportionally first puts water
In beaker, citric acid, gluconic acid are then added, it is well mixed to can be prepared by；, can quickly, clearly using this chemical mordant
The metallographic structure of clear display magnesium alloy particularly heat treatment state magnesium alloy.
Embodiment
To become apparent present disclosure, below in conjunction with specific embodiment, the present invention will be described in detail.
Embodiment 1
First 100g water is added in beaker, 10g citric acids, 10g gluconic acids is then respectively adding, is gently stirred with glass bar
Mix, be well mixed.After corrosive agent is prepared, in the chemical mordant that the magnesium alloy sample immersion after polishing is prepared, leaching
The erosion time is 5-10 seconds, and alcohol rinse is used after taking-up, dries or is blotted with filter paper, that is, obtain the magnesium alloy metallographic group to be observed
Knit.
Embodiment 2
First 100g water is added in beaker, 12g citric acids, 8g gluconic acids is then respectively adding, is gently stirred with glass bar
Mix, be well mixed.After corrosive agent is prepared, in the chemical mordant that the magnesium alloy sample immersion after polishing is prepared, leaching
The erosion time is 5-10 seconds, and alcohol rinse is used after taking-up, dries or is blotted with filter paper, that is, obtain the magnesium alloy metallographic group to be observed
Knit.
Embodiment 3
First 100g water is added in beaker, 15g citric acids, 5g gluconic acids is then respectively adding, is gently stirred with glass bar
Mix, be well mixed.After corrosive agent is prepared, in the chemical mordant that the magnesium alloy sample immersion after polishing is prepared, leaching
The erosion time is 5-10 seconds, and alcohol rinse is used after taking-up, dries or is blotted with filter paper, that is, obtain the magnesium alloy metallographic group to be observed
Knit.
Claims (1)
1. a kind of magnesium alloy metallographic structure observational technique, it is characterised in that comprise the following steps：
1）According to mass ratio, it is dissolved in by 10-15 parts of citric acids and 5-10 parts of gluconic acid in 100 parts of water and chemical corruption is made
Lose agent；
2）Magnesium alloy is polished and step 1 is immersed in）5-10 seconds in the chemical mordant of preparation, take out and rushed with alcohol immediately
Wash, dry after i.e. observable magnesium alloy metallographic structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510036217.2A CN104593774B (en) | 2015-01-26 | 2015-01-26 | A kind of magnesium alloy metallographic structure observational technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510036217.2A CN104593774B (en) | 2015-01-26 | 2015-01-26 | A kind of magnesium alloy metallographic structure observational technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104593774A CN104593774A (en) | 2015-05-06 |
| CN104593774B true CN104593774B (en) | 2017-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510036217.2A Expired - Fee Related CN104593774B (en) | 2015-01-26 | 2015-01-26 | A kind of magnesium alloy metallographic structure observational technique |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043843A (en) * | 2015-08-05 | 2015-11-11 | 河南科技大学 | Magnesium alloy sample corrosive agent |
| CN105925983B (en) * | 2016-06-28 | 2019-05-28 | 北京石油化工学院 | A kind of metallographic etching agent and its application method of As-extruded magnesium lithium alloy |
| CN107723710A (en) * | 2017-11-15 | 2018-02-23 | 北京石油化工学院 | A kind of metallographic etching agent and its application method of the pure titanium or titanium alloy of annealed state |
| CN108760451A (en) * | 2018-05-25 | 2018-11-06 | 河南科技大学 | The preparation method of magnesium alloy metallographic specimen after a kind of creep |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586763A (en) * | 2012-03-21 | 2012-07-18 | 成都青元泛镁科技有限公司 | Novel chemical nickel-plating method for magnesium alloy |
| CN102888606A (en) * | 2012-09-28 | 2013-01-23 | 东莞市凯昶德电子科技股份有限公司 | Chemical corrosive liquid for magnesium alloy microsection and application of chemical corrosive liquid |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8262870B2 (en) * | 2005-06-10 | 2012-09-11 | Aeromet Technologies, Inc. | Apparatus, methods, and compositions for removing coatings from a metal component |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586763A (en) * | 2012-03-21 | 2012-07-18 | 成都青元泛镁科技有限公司 | Novel chemical nickel-plating method for magnesium alloy |
| CN102888606A (en) * | 2012-09-28 | 2013-01-23 | 东莞市凯昶德电子科技股份有限公司 | Chemical corrosive liquid for magnesium alloy microsection and application of chemical corrosive liquid |
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