CN108220964A - A kind of C70600 microstructure of the alloy corrosive liquid and its application method - Google Patents
A kind of C70600 microstructure of the alloy corrosive liquid and its application method Download PDFInfo
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- CN108220964A CN108220964A CN201711344615.6A CN201711344615A CN108220964A CN 108220964 A CN108220964 A CN 108220964A CN 201711344615 A CN201711344615 A CN 201711344615A CN 108220964 A CN108220964 A CN 108220964A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/18—Acidic compositions for etching copper or alloys thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
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Abstract
A kind of C70600 microstructure of the alloy corrosive liquid and its application method are related to the metallographic etchant and application method of a kind of structure analysis of metal alloy compositions.It is characterized in that the weight ratio composition of its corrosive liquid is：1.0~1.2 grams, 25~30ml of concentrated hydrochloric acid, 20~25ml of concentrated nitric acid of ferric trichloride, water 50ml.The use of process is that the grinding and polishing face of metallographic specimen is completely immersed in corrosive liquid, etching time：3~10min.A kind of C70600 microstructure of the alloy corrosive liquid of the present invention, the sample metallographic structure figure after corrosion, alloy microstructure is clear, and phase and phase contrast is apparent, and crystal boundary is clear.The metallographic structure for sample can fast and efficiently be corroded.Tiny, the uniform worked structure of the major diameter produced compo pipe is enable to observe, accurate judge can be made to its product quality, reliable basis is provided.
Description
Technical field
A kind of C70600 microstructure of the alloy corrosive liquid and its application method, the structure analysis for being related to a kind of metal alloy compositions are used
Metallographic etchant and application method.
Background technology
C70600 alloys are equivalent to the BFe10-1-1 Copper-nickel alloy tubes in GB 5231-2001, and cupro-nickel base simultaneously has a small amount of ferrimanganic
Quaternary alloy, nickel can be infinitely dissolved in copper, form continuous solid solution.Iron can improve the mechanical performance of copper-nickel alloy, but its is molten
Xie Du is smaller, and the addition of manganese can also improve the mechanical performance of copper-nickel alloy.Adding in Fe, Mn element makes alloy mechanical property and corrosion resisting property
It significantly improves, and with performances such as excellent seawater corrosion resistance, the attachment of anti-marine organisms and good thermal conductivities, is widely used
It is widely used in shipping industry, chemical industry, energy industry, ocean engineering as heat exchanger, condenser with tubing
The fields such as beach power station, petrochemical industry, ship and sea water desalination, especially with China's shipping industry fast development and
LNG station receiving station engineering put into operation and the high-end fields such as military industry, with marine cause development and strengthen naval and build
If process, the demand of copper and copper alloy condenser pipe is by rapid growth.Particularly major diameter White Copper Tubes production difficulty is big, becomes a useful person
Rate is low, and the market demand is powerful, and added value of product is high, but barrier of entry is high, very high to the quality requirement of product.
In order to which strictly control product quality, promotion product quality are adjusted and optimized by Metallographic Analysis in process of production
The technological parameter of melting, casting and subsequent handling.Metallographic Analysis be rolling metal and new material developmental research application it is most basic
Detection method.
C70600 alloys have stronger corrosion resistance, the metallographic etchant of fine copper is usually nitric acid compared with fine copper
With the mixed liquor of water, and the corrosion resistance of C70600 alloys is stronger, and the microstructure of the alloy corrosion of the C70600 trades mark can be newly found by looking into
Reagent solution, the mixed liquor that useful nitric acid and water are prepared according to a certain percentage, also useful ferric trichloride corroded with alcohol,
Useful nitric acid is prepared according to a certain percentage with hydrochloric acid and water.The corrosive agent preparation type of C70600 corrosive liquids is more,
C70600 alloy corrosion effects after these corrosion corrosion processing are undesirable.
Metallographic structure observation and grain size measure, and fast and efficiently corrode and the stronger C70600 trades mark metallographic of corrosion resistance
Tissue, enables tiny, the uniform worked structure of the major diameter produced compo pipe to observe, its product quality can be made
Accurate judge provides reliable basis, and client is also made to have accurate judgement to the judgement of product microstructure, judges whether product meets confession
Goods requires and requirement, and finding a kind of effective C70600 microstructure of the alloy corrosive liquid seems particularly significant.
Invention content
For the purpose of the present invention aiming at insufficient existing for above-mentioned prior art, providing a kind of can make alloy microstructure clear
It is clear to display, and crystal boundary is clear, crystal grain is with intercrystalline contrast evident from process easy to produce carries out public skill parameter optimization
And the C70600 microstructure of the alloy corrosive liquid and its application method of Improving The Quality of Products.
The purpose of the present invention is what is be achieved through the following technical solutions.
A kind of C70600 microstructure of the alloy corrosive liquid, it is characterised in that the weight ratio of its corrosive liquid, which forms, is：Ferric trichloride 1.0
~1.2 grams, 25~30ml of concentrated hydrochloric acid, 20~25ml of concentrated nitric acid, water 50ml.
A kind of C70600 microstructure of the alloy corrosive liquid of the present invention, it is characterised in that 1.0~1.2 grams of ferric trichloride, concentrated hydrochloric acid
25~30ml, 20~25ml of concentrated nitric acid, water 50ml.
A kind of C70600 microstructure of the alloy corrosive liquid of the present invention, it is characterised in that the volumetric concentration of the concentrated hydrochloric acid is
65%。
A kind of C70600 microstructure of the alloy corrosive liquid of the present invention, it is characterised in that the volumetric concentration of the concentrated nitric acid is
65%-68%。
The application method of a kind of C70600 microstructure of the alloy corrosive liquid of the present invention, it is characterised in that the use of process is by metallographic
The grinding and polishing face of sample is completely immersed in corrosive liquid, etching time：3~10min.
A kind of C70600 microstructure of the alloy corrosive liquid of the present invention, to cleaved, grinding, the sample of polishing fluid polishing uses
Corrosive liquid carries out surface corrosion, and the sample metallographic structure figure after corrosion, alloy microstructure is clear, and phase and phase contrast is apparent, crystal boundary
Clearly.The metallographic structure for sample can fast and efficiently be corroded.Make the tiny, uniform of the major diameter compo pipe produced
Worked structure is observed, and accurate judge can be made to its product quality and provides reliable basis.
Description of the drawings
Fig. 1 is the sample metallographic structure figure that microstructure of the alloy corrosive liquid using the present invention obtains；
Fig. 2 is the sample metallographic structure figure that microstructure of the alloy corrosive liquid using the present invention obtains；
Fig. 3 is the sample metallographic structure figure that microstructure of the alloy corrosive liquid using the present invention obtains.
Specific embodiment
A kind of C70600 microstructure of the alloy corrosive liquid, the weight ratio composition of corrosive liquid are：1.0~1.2 grams of ferric trichloride is dense
25~30ml of hydrochloric acid, 20~25ml of concentrated nitric acid, water 50ml.Wherein, the volumetric concentration of the concentrated hydrochloric acid is 65%；Described is dense
The volumetric concentration of nitric acid is 65%-68%.
During corrosion, the grinding and polishing face of metallographic specimen is completely immersed in corrosive liquid, etching time：3~10min.
Its concrete operations is as follows：
It is first sampled, first carries out grinding and polishing with the coarse sandpaper of 180 mesh, be then ground using varigrained metallographic waterproof abrasive paper
→ on polishing machine using diamond paste carry out grinding and polishing → metallographic specimen surface water flushing → metallographic surface alcohol rinse →
Using development different ratio corrosive liquid carry out metallographic surface corrosion → being rinsed using distilled water → utilize absorbent cotton with
Alcohol carry out specimen surface cleaning → using light microscope carry out metallographic structure observation → by metallographic structure pattern and phase and
Crystal boundary is observed, and seeks the metallographic etchant most preferably prepared and appropriate etching time → carry out metallographic structure analysis.
By a series of experiments, the best corrosive liquid sought：1.0~1.2 grams of ferric trichloride, concentrated hydrochloric acid 25~30ml are dense
20~25ml of nitric acid, water 50ml.The grinding and polishing face of metallographic specimen is completely immersed in corrosive liquid, etching time during corrosion：3~10min.
Embodiment 1
Head, the tail portion of the different pipe pipes of 2 ￠ 256*10mm of certain enterprise production are sampled respectively, utilize wire cutting
The sample of 15*10*10mm is made in machine, then carries out grinding and polishing with the coarse sandpaper of 180 mesh, then with the mesh metallographic sand of 400 mesh~1000
When paper carries out metallic phase polishing, the rotating speed of polished machine is set as 420 turns/min or so, is carried out using the abrasive paper for metallograph of 1200-2000 mesh
During grinding and polishing, the rotating speed of polished machine is set as 400 turns/min hereinafter, then being polished on polished machine using 1 micron diamond abrasive pastes,
Polishing time is 2min.It observes that specimen surface is non-and is always on cunning, without any cut, then change clean polishing cloth, use distilled water
As lubricant, after polishing 1min, it is then rinsed with water specimen surface, then with alcohol rinse specimen surface.
Embodiment 2
Corrosive liquid is prepared：It has weighed 1.0 grams of ferric trichloride in the balance to be placed in the beaker of 200ml, has then measured 50ml distilled water and fall
It in the beaker of 200ml capacity, then measures 30ml concentrated hydrochloric acids and is poured in this beaker, then measure 22ml concentrated nitric acids and pour into this beaker
In, it is sufficiently stirred with glass bar, ferric trichloride is made fully to dissolve, stand the corrosion of progress metallographic specimen after 10min.
Fig. 1 is the 1# sample metallographic structure figures after being corroded using the corrosive liquid of said ratio, as can be seen from Fig., is closed
Payment organization is clear in structure, and phase and phase contrast is apparent, and crystal boundary is clear.
Embodiment 3
Corrosive liquid is prepared：It has weighed 1.1 grams of ferric trichloride in the balance to be placed in the beaker of 200ml, has then measured 50ml distilled water and fall
It in the beaker of 200ml capacity, then measures 28ml concentrated hydrochloric acids and is poured in this beaker, then measure 22ml concentrated nitric acids and pour into this beaker
In, it is sufficiently stirred with glass bar, ferric trichloride is made fully to dissolve, stand the corrosion of progress metallographic specimen after 10min.
Fig. 2 is the 2# sample metallographic structure figures after being corroded using the corrosive liquid of said ratio, as can be seen from Fig., is closed
Payment organization is clear in structure, and phase and phase contrast is apparent, and crystal boundary is clear.
Embodiment 4
Corrosive liquid is prepared：It has weighed 1.2 grams of ferric trichloride in the balance to be placed in the beaker of 200ml, has then measured 50ml distilled water and fall
It in the beaker of 200ml capacity, then measures 26ml concentrated hydrochloric acids and is poured in this beaker, then measure 25ml concentrated nitric acids and pour into this beaker
In, it is sufficiently stirred with glass bar, ferric trichloride is made fully to dissolve, stand the corrosion of progress metallographic specimen after 10min.
Claims (4)
1. a kind of C70600 microstructure of the alloy corrosive liquid, it is characterised in that the weight ratio of its corrosive liquid, which forms, is：Ferric trichloride 1.0~
1.2 grams, 25~30ml of concentrated hydrochloric acid, 20~25ml of concentrated nitric acid, water 50ml.
A kind of 2. C70600 microstructure of the alloy corrosive liquid according to claim 1, it is characterised in that the body of the concentrated hydrochloric acid
Product a concentration of 65%.
A kind of 3. C70600 microstructure of the alloy corrosive liquid according to claim 1, it is characterised in that the body of the concentrated nitric acid
A concentration of 65%-68% of product.
4. the application method of a kind of C70600 microstructure of the alloy corrosive liquid according to claim 1, it is characterised in that used
Journey is that the grinding and polishing face of metallographic specimen is completely immersed in corrosive liquid, etching time：3~10min.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088975A (en) * | 2021-03-26 | 2021-07-09 | 西安建筑科技大学 | Metallographic corrosive agent and corrosion method for aluminum/titanium/nickel/stainless steel composite material |
| CN114959707A (en) * | 2022-05-27 | 2022-08-30 | 重庆赛宝工业技术研究院有限公司 | Etching liquid and preparation method and application thereof |
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| CN102443803A (en) * | 2012-02-23 | 2012-05-09 | 中国船舶重工集团公司第七二五研究所 | Metallographic corrosion method for martensitic precipitation hardening stainless steel crystal boundary |
| CN105352779A (en) * | 2015-10-21 | 2016-02-24 | 中国船舶重工集团公司第七二五研究所 | Metallographic erosion method of nickel-aluminum bronze crystal boundary |
| CN105603429A (en) * | 2016-02-19 | 2016-05-25 | 金川集团股份有限公司 | Metallographic corrosive liquid used for 304L stainless steel and preparation method and corroding method thereof |
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2017
- 2017-12-15 CN CN201711344615.6A patent/CN108220964A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102443803A (en) * | 2012-02-23 | 2012-05-09 | 中国船舶重工集团公司第七二五研究所 | Metallographic corrosion method for martensitic precipitation hardening stainless steel crystal boundary |
| CN105352779A (en) * | 2015-10-21 | 2016-02-24 | 中国船舶重工集团公司第七二五研究所 | Metallographic erosion method of nickel-aluminum bronze crystal boundary |
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| 任颂赞等: "《金相分析原理及技术》", 31 August 2013 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088975A (en) * | 2021-03-26 | 2021-07-09 | 西安建筑科技大学 | Metallographic corrosive agent and corrosion method for aluminum/titanium/nickel/stainless steel composite material |
| CN114959707A (en) * | 2022-05-27 | 2022-08-30 | 重庆赛宝工业技术研究院有限公司 | Etching liquid and preparation method and application thereof |
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