CN105506714A - Process for improving alloy performance by adding lanthanum nitrate and nanometer zinc oxide into electrolyte - Google Patents
Process for improving alloy performance by adding lanthanum nitrate and nanometer zinc oxide into electrolyte Download PDFInfo
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- CN105506714A CN105506714A CN201410500785.9A CN201410500785A CN105506714A CN 105506714 A CN105506714 A CN 105506714A CN 201410500785 A CN201410500785 A CN 201410500785A CN 105506714 A CN105506714 A CN 105506714A
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- lanthanum nitrate
- zinc oxide
- electrolytic solution
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Abstract
The invention discloses a process for improving alloy performance by adding lanthanum nitrate and nanometer zinc oxide into an electrolyte. According to the process, micro-arc oxidation equipment is employed for preparing an oxidized ceramic film on the surface of an aluminum magnesium alloy, lanthanum nitrate and nanometer zinc oxide are added into the electrolyte used for preparing the oxidized ceramic film, the content of lanthanum nitrate is 0.5 g/L, the content of nanometer zinc oxide is 3 g/L. Through addition of lanthanum nitrate and nanometer zinc oxide into a silicate system for micro-arc oxidation of the aluminum magnesium alloy, the surface of the ceramic film obtained after micro-arc oxidation has obviously reduced micro-cracks and porosity; and in particular, when the content of lanthanum nitrate is 0.5 g/L and the content of nanometer zinc oxide is 3 g/L, the ceramic film with good comprehensive properties can be obtained on the surface of a sample after micro-arc oxidation.
Description
Technical field
The present invention relates to a kind of technique of adding lanthanum nitrate and nano zine oxide raising alloy property in the electrolytic solution, belong to alloy property optimisation technique field.
Background technology
Apply more widely along with the light-weighted trend of mechanical component makes high tough aluminium alloy have.In order to meet the demand constantly increased, researcher has carried out a large amount of scientific researches to high-toughness casting aluminum alloy, also achieves a lot of achievements.But how improve the performance of existing cast aluminium alloy further and develop novel alloy series to meet various needs, remaining an important problem.The current potential of aluminium depends on the insulating property of ceramic film to a certain extent, improves the compactness of its surface oxidation ceramic film, increases the raising that the thickness of rete all contributes to corrosion resistance.The corrosion speed of aluminium alloy is more faster than fine aluminium in general.Differential arc oxidization technique highlights in numerous process for treating surface, from introduction research till now, although have many achievements and conclusion, is also in conceptual phase, non-large scale investment industrial production.
Summary of the invention
The problem to be solved in the present invention: a kind of technique of adding lanthanum nitrate and nano zine oxide raising alloy property is in the electrolytic solution provided, is intended to the performance improving aluminum magnesium alloy, with the demand of satisfied industry.
Technical scheme of the present invention:
Add the technique of lanthanum nitrate and nano zine oxide raising alloy property in the electrolytic solution, adopt and microarc oxidation equipment providedly prepare ceramic oxide rete on aluminum magnesium alloy surface, add lanthanum nitrate and nano zine oxide preparing in ceramic oxide rete electrolytic solution used, described when lanthanum nitrate content be 0.5g/L, nano oxidized Zn content is 3g/L.
As preferably, described microarc oxidation equipment providedly exchange microarc oxidation equipment provided for two pulse.
As preferably, described electrolytic solution is silicate electrolyte.
Beneficial effect of the present invention:
Lanthanum nitrate is added and nano zine oxide carries out differential arc oxidation to aluminum magnesium alloy in silicate systems, after differential arc oxidation, the crizzle of ceramic film and porosity obviously reduce, especially when lanthanum nitrate content is 0.5g/L, nano oxidized Zn content is 3g/L, and after differential arc oxidation, specimen surface can obtain the good ceramic film of over-all properties.
Accompanying drawing illustrates:
Fig. 1 is La (NO
3)
3the change curve that+n-ZnO add-on affects thicknesses of layers;
Fig. 2 is La (NO
3)
3the change curve that+n-ZnO add-on affects film hardness.
embodiment:
Embodiment:
In the present invention microarc oxidation equipment provided for two pulse exchange microarc oxidation equipment provided, electrolytic solution is silicate electrolyte.
First prepare different lanthanum nitrate and nano zine oxide, as table 1, then prepare ceramic oxide rete by microarc oxidation equipment provided for the employing of this electrolytic solution on aluminum magnesium alloy surface.
1 mixed additive content list
| Sample number into spectrum | La(NO 3) 3Additive level (g/L) | Nano-ZnO additive level (g/L) |
| 0 # | 0 | 0 |
| 1 # | 0.4 | 2 |
| 2 # | 0.4 | 3 |
| 3 # | 0.4 | 4 |
| 4 # | 0.5 | 2 |
| 5 # | 0.5 | 3 |
| 6 # | 0.5 | 4 |
| 7 # | 0.6 | 2 |
| 8 # | 0.6 | 3 |
Measure ceramic layer mean thickness with TT230 cladding thickness measurer, adopt HV1000 microhardness tester to measure the microhardness of sample, as can be seen from Fig. 1 and Fig. 2, in micro-arc oxidation electrolyte, add La (NO
3)
3after nano-ZnO, thicknesses of layers and hardness increase.Under this experiment condition, as La (NO
3)
3concentration is 0.5g/L, and when nano ZnO concentration is 2g/L, the thicknesses of layers obtained is maximum, can reach 82 μm; Slightly different with thicknesses of layers variation tendency, when nano ZnO concentration is 3g/L, different concns La (NO
3)
3film hardness change greatly.Wherein, 5
#the film hardness that sample obtains is the highest, can reach 680HV.
Claims (3)
1. add the technique of lanthanum nitrate and nano zine oxide raising alloy property in the electrolytic solution, it is characterized in that: adopt and microarc oxidation equipment providedly prepare ceramic oxide rete on aluminum magnesium alloy surface, add lanthanum nitrate and nano zine oxide preparing in ceramic oxide rete electrolytic solution used, described when lanthanum nitrate content be 0.5g/L, nano oxidized Zn content is 3g/L.
2. according to claim 1ly a kind ofly add the technique that lanthanum nitrate and nano zine oxide improve alloy property in the electrolytic solution, it is characterized in that: described microarc oxidation equipment provided for two pulse interchange microarc oxidation equipment provided.
3. a kind of technique of adding lanthanum nitrate and nano zine oxide raising alloy property in the electrolytic solution according to claim 1, is characterized in that: described electrolytic solution is silicate electrolyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410500785.9A CN105506714A (en) | 2014-09-26 | 2014-09-26 | Process for improving alloy performance by adding lanthanum nitrate and nanometer zinc oxide into electrolyte |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410500785.9A CN105506714A (en) | 2014-09-26 | 2014-09-26 | Process for improving alloy performance by adding lanthanum nitrate and nanometer zinc oxide into electrolyte |
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| Publication Number | Publication Date |
|---|---|
| CN105506714A true CN105506714A (en) | 2016-04-20 |
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| CN201410500785.9A Pending CN105506714A (en) | 2014-09-26 | 2014-09-26 | Process for improving alloy performance by adding lanthanum nitrate and nanometer zinc oxide into electrolyte |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839163A (en) * | 2016-05-24 | 2016-08-10 | 江苏理工学院 | Electrolyte applied to laser coupling microplasma arc oxidation of 7075 aluminum alloys |
| CN108950652A (en) * | 2018-08-17 | 2018-12-07 | 蔡文剑 | A kind of ceramic pan and preparation method thereof of differential of arc on metal surface oxidation |
| CN110760916A (en) * | 2019-11-18 | 2020-02-07 | 和县科嘉阀门铸造有限公司 | Method for improving corrosion resistance of magnesium alloy valve |
-
2014
- 2014-09-26 CN CN201410500785.9A patent/CN105506714A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839163A (en) * | 2016-05-24 | 2016-08-10 | 江苏理工学院 | Electrolyte applied to laser coupling microplasma arc oxidation of 7075 aluminum alloys |
| CN105839163B (en) * | 2016-05-24 | 2018-06-08 | 江苏理工学院 | For the electrolyte of 7075 aluminium alloy laser coupled microplasma arcs oxidation |
| CN108950652A (en) * | 2018-08-17 | 2018-12-07 | 蔡文剑 | A kind of ceramic pan and preparation method thereof of differential of arc on metal surface oxidation |
| CN110760916A (en) * | 2019-11-18 | 2020-02-07 | 和县科嘉阀门铸造有限公司 | Method for improving corrosion resistance of magnesium alloy valve |
| CN110760916B (en) * | 2019-11-18 | 2022-04-05 | 和县科嘉阀门铸造有限公司 | Method for improving corrosion resistance of magnesium alloy valve |
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Application publication date: 20160420 |