CN109490051A - A kind of etching pit method of 5A06 aluminium alloy - Google Patents
A kind of etching pit method of 5A06 aluminium alloy Download PDFInfo
- Publication number
- CN109490051A CN109490051A CN201811323764.9A CN201811323764A CN109490051A CN 109490051 A CN109490051 A CN 109490051A CN 201811323764 A CN201811323764 A CN 201811323764A CN 109490051 A CN109490051 A CN 109490051A
- Authority
- CN
- China
- Prior art keywords
- aluminium alloy
- articles made
- corrosive liquid
- naoh solution
- mesh
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- ing And Chemical Polishing (AREA)
Abstract
The invention discloses a kind of etching pit methods of 5A06 aluminium alloy, comprising steps of preparing 1.8~2%HCl+4.5~5.5%H3PO4The first corrosive liquid, and the NaOH solution that mass fraction is 8.5~9.5%, 5A06 articles made of aluminium alloy surface is polished, polishing, alcohol wipe surface is used after removing clast, then the first corrosive liquid after heating is added drop-wise to the 5A06 articles made of aluminium alloy surface after heating, heating temperature is 45 ± 5 DEG C, corrode 40~55s, after cleaning and drying up moisture, treated 5A06 articles made of aluminium alloy and NaOH solution are both heated to 65 ± 5 DEG C again, then the NaOH solution is added drop-wise to the 5A06 articles made of aluminium alloy surface, corrode 3~5min, it cleans again, dry up moisture.This method is not only easy to operate, at low cost, and can precisely remove crystal boundary structure, shows grain structure structure clearly.
Description
Technical field
The present invention relates to technical field of aluminum alloy technology, and in particular to one kind is simple and efficient, can clearly see under metallographic microscope
Observe the etching pit method of the grain structure of 5A06 aluminium alloy.
Background technique
5A06 aluminium alloy is a kind of typical Al-Mg alloy, intensity, good corrosion resistance and weldability with higher
The features such as, it can be used for making the products such as lightweight and corrosion resistance structural member, led in aerospace, communications and transportation, mechanical industry etc.
Domain is widely applied.Since aluminium alloy is the defects of processing is with open grain structure easy to form in last handling process, this is shadow
One of the principal element of mechanics of materials intensity is rung, therefore needs to investigate the grain structure of aluminium alloy in practical applications, still
For 5A06 aluminium alloy because having good corrosion resistance, transgranular and crystal boundary difference is smaller, its metallographic structure is caused to be difficult to corrode, even if
Corrosion is also difficult to be clearly distinguished in boundary out and crystal boundary, and metallographic structure is caused to show not exclusively, thus the prior art is usually all
It is observed using anode overlay film biasing light, but time-consuming for this observation method, it is at high cost, limit the extensive of 5A06 aluminium alloy
Using.
Therefore how to make the etching pit of 5A06 aluminium alloy become as common aluminum alloy it is simple and fast be this field still
Problem to be solved.
Summary of the invention
In view of the above shortcomings of the prior art, the object of the present invention is to provide a kind of etching pits of 5A06 aluminium alloy
Method, the 5A06 aluminium alloy of this method processing it is observed that clearly crystal boundary, have that accuracy is high, operation under metallographic microscope
Simply, advantage at low cost.
To achieve the above object, the invention adopts the following technical scheme:
A kind of etching pit method of 5A06 aluminium alloy, comprising steps of
S1, the first corrosive liquid is prepared, first corrosive liquid includes the following component by volume fraction: HCl1.8~
2%, H3PO44.5~5.5%, surplus is deionized water；
S2, the NaOH solution that mass fraction is 8.5~9.5% is prepared, as the second corrosive liquid；
S3,5A06 articles made of aluminium alloy surface is polished, polishing uses alcohol wipe surface after removing clast；
S4, the 5A06 articles made of aluminium alloy of wiped clean and step S1 the first corrosive liquid prepared are both heated to 45 ± 5 DEG C,
Then first corrosive liquid after heating is added drop-wise to the 5A06 articles made of aluminium alloy surface, constant temperature corrodes 40~55s, then spends
Ionized water is rinsed well, and moisture is dried up；
S5, the NaOH solution prepared through step S4 treated 5A06 articles made of aluminium alloy and step S2 is both heated to 65 ±
5 DEG C, the NaOH solution after heating is then added drop-wise to the 5A06 articles made of aluminium alloy surface, constant temperature corrodes 3~5min, then
It is rinsed well with deionized water, dries up moisture.
Preferably, in the step S4, etching time is 45~55s.
Preferably, in the step S3, the polishing successively with the sand paper of 400 mesh, 800 mesh, 1000 mesh and 1500 mesh into
Row, it is the suspension polishing agent of 500nm diamond that partial size is selected in polishing, to remove surface scale, and guarantees that article surface is smooth flat
It is whole, enable corrosive liquid homogeneous corrosion article surface.
It is furthermore preferred that the blasting craft before further including polishing, the product relatively high for surface roughness, at sandblasting
Surface smoothness not only can be improved in reason, can also remove most oxide layer, greatly reduce sanding workload.
Inventor has found through many experiments, at 45 ± 5 DEG C, centainly matches HCl/H3PO4Aqueous solution can effectively corrode
Etching time is further controlled in 40~55s, grain contours can tentatively be presented, simultaneously by the crystal boundary structure of 5A06 aluminium alloy
Article surface is smooth after corrosion.It is subsequent to be performed under heating conditions second of corrosion with NaOH solution, grain contours can be made attached
Close crystal boundary structure corrosion completely, obtains clearly grain contours.
Beneficial effects of the present invention:
The present invention carries out grinding and buffing to 5A06 aluminum alloy surface before corrosion, eliminates surface scale, makes to corrode
Liquid can homogeneous corrosion article surface, then successively use HCl/H3PO4Aqueous solution and NaOH solution are corroded, and can precisely be gone
Except crystal boundary structure, show grain structure structure clearly, and this method is easy to operate, it is at low cost, it is suitble to industrial applications,
With certain economic value.
Detailed description of the invention
Fig. 1 is the metallograph of the embodiment of the present invention 1.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and detailed description.
" HCl " alleged by the present invention is commercially available concentrated hydrochloric acid, and mass fraction is about 37%, alleged " H3PO4" it is industrial phosphoric acid, phosphorus
Acid content is about 85%.
Embodiment 1
1, the commercially available concentrated hydrochloric acid of 1.8ml, 5ml industrial phosphoric acid are taken respectively, is added in 93ml deionized water, are mixed, as first
Corrosive liquid.
2, the NaOH solution 100ml that mass fraction is 8.5~9.5% is prepared, is the second corrosive liquid；
3,5A06 aluminium alloy cast ingot is taken, is polished with sand-blasting machine to erosional surface, then successively with 400 mesh, 800 mesh, 1000 mesh
It polishes with the sand paper of 1500 mesh, polishes in the same direction every time, and the adjacent direction of polishing twice keeps 90 ° of angles, guarantees
While grinding off surface scale, obvious scratch is avoided the occurrence of；
4, it is that 500nm diamond suspension polishing agent is polished with partial size, makes flat and smooth to corrosion surface, then removes
Clast, with wipes of alcohol clean surface；
5, the first corrosive liquid that the 5A06 articles made of aluminium alloy and step 1 of wiped clean are prepared is both heated to 48 DEG C, then
By first corrosive liquid after heating be added drop-wise to the 5A06 articles made of aluminium alloy on erosional surface, constant temperature corrodes 45s, then spends
Ionized water is rinsed well, and moisture is dried up；
6, the NaOH solution prepared through step 5 treated 5A06 articles made of aluminium alloy and step 2 is both heated to 68 DEG C, so
The NaOH solution after heating is added drop-wise to the 5A06 articles made of aluminium alloy surface afterwards, constant temperature corrodes 4min, then uses deionization
Water is rinsed well, and moisture is dried up.
It is observed according to the regulation of GB/T 3246 with 30 type metallographic microscope of Neophot (production of German Carl Zeiss company)
The alloy structure of corrosion surface, as a result as shown in Figure 1.As it can be seen that after being handled using this method, it can be seen that similar dendritic crystal grain
Form.
Embodiment 2
1, it takes the commercially available concentrated hydrochloric acid of 1.8ml, 5.2ml industrial phosphoric acid respectively, is added in 93ml deionized water, mix, as the
One corrosive liquid.
2, the NaOH solution 100ml that mass fraction is 9.5% is prepared, is the second corrosive liquid；
3,5A06 aluminium alloy cast ingot is taken, is polished with sand-blasting machine to erosional surface, then successively with 400 mesh, 800 mesh, 1000 mesh
It polishes with the sand paper of 1500 mesh, polishes in the same direction every time, and the adjacent direction of polishing twice keeps 90 ° of angles, guarantees
While grinding off surface scale, obvious scratch is avoided the occurrence of；
4, it is that 500nm diamond suspension polishing agent is polished with partial size, makes flat and smooth to corrosion surface, then removes
Clast, with wipes of alcohol clean surface；
5, the first corrosive liquid that the 5A06 articles made of aluminium alloy and step 1 of wiped clean are prepared is both heated to 50 DEG C, then
By first corrosive liquid after heating be added drop-wise to the 5A06 articles made of aluminium alloy on erosional surface, constant temperature corrodes 55s, then spends
Ionized water is rinsed well, and moisture is dried up；
6, the NaOH solution prepared through step 5 treated 5A06 articles made of aluminium alloy and step 2 is both heated to 68 DEG C, so
The NaOH solution after heating is added drop-wise to the 5A06 articles made of aluminium alloy surface afterwards, constant temperature corrodes 3.5min, then spend from
Sub- water is rinsed well, and moisture is dried up.
It is observed according to the regulation of GB/T 3246 with 30 type metallographic microscope of Neophot (production of German Carl Zeiss company)
The alloy structure of corrosion surface, as a result (not shown) similar to Fig. 1, it is seen then that after this method processing, it can be seen that similar branch
The grain form of shape.
Embodiment 3
1, the commercially available concentrated hydrochloric acid of 2ml, 5ml industrial phosphoric acid are taken respectively, is added in 93ml deionized water, is mixed, and as first is rotten
Lose liquid.
2, the NaOH solution 100ml that mass fraction is 8.5% is prepared, is the second corrosive liquid；
3,5A06 aluminium alloy cast ingot is taken, is polished with sand-blasting machine to erosional surface, then successively with 400 mesh, 800 mesh, 1000 mesh
It polishes with the sand paper of 1500 mesh, polishes in the same direction every time, and the adjacent direction of polishing twice keeps 90 ° of angles, guarantees
While grinding off surface scale, obvious scratch is avoided the occurrence of；
4, it is that 500nm diamond suspension polishing agent is polished with partial size, makes flat and smooth to corrosion surface, then removes
Clast, with wipes of alcohol clean surface；
5, the first corrosive liquid that the 5A06 articles made of aluminium alloy and step 1 of wiped clean are prepared is both heated to 42 DEG C, then
By first corrosive liquid after heating be added drop-wise to the 5A06 articles made of aluminium alloy on erosional surface, constant temperature corrodes 45s, then spends
Ionized water is rinsed well, and moisture is dried up；
6, the NaOH solution prepared through step 5 treated 5A06 articles made of aluminium alloy and step 2 is both heated to 70 DEG C, so
The NaOH solution after heating is added drop-wise to the 5A06 articles made of aluminium alloy surface afterwards, constant temperature corrodes 5min, then uses deionization
Water is rinsed well, and moisture is dried up.
It is observed according to the regulation of GB/T 3246 with 30 type metallographic microscope of Neophot (production of German Carl Zeiss company)
The alloy structure of corrosion surface, as a result (not shown) similar to Fig. 1, it is seen then that after this method processing, it can be seen that similar branch
The grain form of shape.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
Claims (4)
1. a kind of etching pit method of 5A06 aluminium alloy, which is characterized in that comprising steps of
S1, the first corrosive liquid is prepared, first corrosive liquid includes the following component by volume fraction: HCl1.8~2%,
H3PO44.5~5.5%, surplus is deionized water；
S2, the NaOH solution that mass fraction is 8.5~9.5% is prepared, as the second corrosive liquid；
S3,5A06 articles made of aluminium alloy surface is polished, polishing uses alcohol wipe surface after removing clast；
S4, the 5A06 articles made of aluminium alloy of wiped clean and step S1 the first corrosive liquid prepared are both heated to 45 ± 5 DEG C, then
First corrosive liquid after heating is added drop-wise to the 5A06 articles made of aluminium alloy surface, constant temperature corrodes 40~55s, then uses deionization
Water is rinsed well, and moisture is dried up；
S5, the NaOH solution prepared through step S4 treated 5A06 articles made of aluminium alloy and step S2 is both heated to 65 ± 5 DEG C,
Then the NaOH solution after heating is added drop-wise to the 5A06 articles made of aluminium alloy surface, constant temperature corrodes 3~5min, then spends
Ionized water is rinsed well, and moisture is dried up.
2. the etching pit method of 5A06 aluminium alloy according to claim 1, which is characterized in that rotten in the step S4
The erosion time is 45~55s.
3. the etching pit method of 5A06 aluminium alloy according to claim 1, which is characterized in that in the step S3, beat
Mill is successively carried out with the sand paper of 400 mesh, 800 mesh, 1000 mesh and 1500 mesh, and it is that the suspension of 500nm diamond is thrown that partial size is selected in polishing
Photo etching.
4. the etching pit method of 5A06 aluminium alloy according to claim 1 or 3, which is characterized in that further include polishing
Preceding blasting craft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811323764.9A CN109490051A (en) | 2018-11-08 | 2018-11-08 | A kind of etching pit method of 5A06 aluminium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811323764.9A CN109490051A (en) | 2018-11-08 | 2018-11-08 | A kind of etching pit method of 5A06 aluminium alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109490051A true CN109490051A (en) | 2019-03-19 |
Family
ID=65695320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811323764.9A Withdrawn CN109490051A (en) | 2018-11-08 | 2018-11-08 | A kind of etching pit method of 5A06 aluminium alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109490051A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595571A (en) * | 2020-12-31 | 2021-04-02 | 湖北亿纬动力有限公司 | Metallographic corrosion method, metallographic testing method and application of alkaline solution |
| CN113092226A (en) * | 2021-04-09 | 2021-07-09 | 芜湖天弋能源科技有限公司 | Aluminum and aluminum alloy metallographic corrosive agent and metallographic test method for aluminum-containing welding part of lithium ion battery |
-
2018
- 2018-11-08 CN CN201811323764.9A patent/CN109490051A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595571A (en) * | 2020-12-31 | 2021-04-02 | 湖北亿纬动力有限公司 | Metallographic corrosion method, metallographic testing method and application of alkaline solution |
| CN113092226A (en) * | 2021-04-09 | 2021-07-09 | 芜湖天弋能源科技有限公司 | Aluminum and aluminum alloy metallographic corrosive agent and metallographic test method for aluminum-containing welding part of lithium ion battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109490051A (en) | A kind of etching pit method of 5A06 aluminium alloy | |
| US3607398A (en) | Chemical stripping process | |
| KR20170015236A (en) | Yttrium thermal spraying coating and method for manufacturing the same | |
| KR100560985B1 (en) | Method of manufacturing enhanced finish sputtering targets | |
| CN105002498A (en) | GH625 high-temperature alloy metallographic etchant and preparation and application method thereof | |
| CN106378294A (en) | Automobile part spray coating process | |
| CN105158046A (en) | Rapid preparation method of continuous casting billet macro-sample | |
| CN104422611A (en) | Metallurgical corrosive and metallurgical structure display method | |
| CN105588747A (en) | Metallographic test corrodent for TB8 titanium alloy material and corrosion method thereof | |
| US4089736A (en) | Method of removing Al-Cr-Co coatings from nickel alloy substrates | |
| CN105092348A (en) | Application method of novel 1-series aluminium alloy (pure aluminium series) erosion solution | |
| CN105738184B (en) | The application method for the etchant that manganese steel austenite grain boundary is shown | |
| CN105296927A (en) | Cleaning method for inner cavity of optical vacuum coating machine | |
| Toboła et al. | The effects of the coating stripping process on regenerated tool cutting edges | |
| CN108588718A (en) | A kind of chemical milling method of titanium alloy precision forged blade | |
| US8354146B2 (en) | Methods for repairing gas turbine engine components | |
| CN101622099A (en) | Surface treatment method of welding part of metallic member | |
| US2480845A (en) | Electrolytic removal of resin from metal | |
| CN102191508A (en) | Surface cleaning method for low-plasticity metal plates and strips | |
| TWI716170B (en) | Method for treating and phosphatizing metal board without acid | |
| CN110296877B (en) | Preparation method of pure titanium metallographic sample | |
| US20080241370A1 (en) | Coating removal from vane rings via tumble strip | |
| CN109402645A (en) | A kind of process of surface treatment of metallic conduit | |
| CN103617945A (en) | A restoration method of integrated circuit chip electrodes | |
| CN113718328B (en) | Surface treatment method for aluminum alloy casting for ship |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190319 |