CN101805900B - Magnesium-lithium alloy molybdate and phosphate conversion solution and method for forming conversion coating - Google Patents
Magnesium-lithium alloy molybdate and phosphate conversion solution and method for forming conversion coating Download PDFInfo
- Publication number
- CN101805900B CN101805900B CN2010101535142A CN201010153514A CN101805900B CN 101805900 B CN101805900 B CN 101805900B CN 2010101535142 A CN2010101535142 A CN 2010101535142A CN 201010153514 A CN201010153514 A CN 201010153514A CN 101805900 B CN101805900 B CN 101805900B
- Authority
- CN
- China
- Prior art keywords
- molybdate
- lithium alloy
- solution
- magnesium
- phosphate
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Chemical Treatment Of Metals (AREA)
Abstract
The invention provides magnesium-lithium alloy molybdate and phosphate conversion solution and a method for forming a conversion coating. The magnesium-lithium alloy molybdate and phosphate conversion solution is prepared from sodium molybdate serving as main salt, monosodium phosphate serving as secondary main salt, citric acid serving as a coordinating agent, sodium fluoride serving as an accelerator, sodium nitrate serving as an accelerating agent, and glacial acetic acid serving as a pH regulator. By using the magnesium-lithium alloy molybdate and phosphate conversion solution to treat a magnesium-lithium alloy, the formed molybdate-phosphate coating has high surface coverage degree on the magnesium-lithium alloy, is uniform and dense, and greatly improves the corrosion resistance of the matrix. The magnesium-lithium alloy molybdate and phosphate conversion solution and the method for forming the conversion coating have the advantages of simple and practicable process, short coating time, low cost, little influence on fatigue property of the magnesium-lithium alloy, low requirement on matrix materials, and no influence of the matrix materials.
Description
Technical field
What the present invention relates to is a kind of surface treatment liquid of alloy, the present invention also relates to a kind of surface treatment method of alloy.The specifically a kind of conversion fluid of conversion film and method that forms conversion film of on magnesium lithium alloy, forming.Belong to inorganic metal material field.
Background technology
Magnesium lithium alloy is because its excellent performance is subjected to various fields researchist's favor, domestic and international research lays particular emphasis on the design alloy more and improves the angle of casting condition, reduce foreign matter content, add alloying element, make the anti-corrosion magnesium lithium alloy of high-purity magnesium lithium alloy and high temperature, and magnesium lithium alloy carried out surface modification improves and the report of the corrosion resisting property of improvement own is considerably less.Magnesium lithium alloy research at home is at the early-stage, and a lot of problems still are in fundamental research and stage of fumbling.Magnesium lithium alloy does not obtain the such large-scale application of other traditional magnesium alloy so far, and a most important reason is exactly that its solidity to corrosion difference is not resolved as yet.Improving the corrosion proof method of magnesium lithium alloy has a lot, wherein chemical conversion embrane method has simple to operate, cost is low, power consumption is few, film formation time is short, low to the basic material requirement, less to the influence of magnesium lithium alloy fatigue property, be applicable to the multiple advantages of surface-treated such as complicated shape such as elongated tubular, some weldment and riveting parts.Traditional chromate conversion coating technology maturation improves a lot to the magnesium lithium alloy corrosion resisting property, but because sexavalent chrome is poisonous, therefore molybdate-phosphate conversion the film of the Chrome-free of the environmental protection of the alternative chromate conversion coating of research and development is significant.Traditional molybdate conversion film is generally regulated with phosphoric acid, and is little to magnesium lithium alloy corrosion resisting property increase rate, only can make corrosion current reduce an order of magnitude.
Summary of the invention
The object of the present invention is to provide a kind of magnesium-lithium alloy molybdate and phosphate conversion solution that can form the conversion film of corrosion current reduction at magnesium lithium alloy.The present invention also aims to provide a kind of method of the formation conversion film based on magnesium-lithium alloy molybdate and phosphate conversion solution.
The object of the present invention is achieved like this:
Magnesium-lithium alloy molybdate of the present invention and phosphate conversion solution are the mixed solutions that adopts following method to obtain:
(1) Sodium orthomolybdate 30-40g fully dissolves with a small amount of distilled water, obtains sodium molybdate solution;
(2) SODIUM PHOSPHATE, MONOBASIC 51.0-51.6g fully dissolves with a small amount of distilled water, obtains sodium dihydrogen phosphate;
(3) Trisodium Citrate 4-5g fully dissolves with a small amount of distilled water, obtains sodium citrate solution;
(4) Sodium Fluoride 3-4g fully dissolves with a small amount of distilled water, obtains Fluorinse;
(5) SODIUMNITRATE 1g fully dissolves with a small amount of distilled water, obtains sodium nitrate solution;
(6) with sodium dihydrogen phosphate under fully stirring, pour in the sodium molybdate solution, obtain mixed liquor A;
(7) with sodium citrate solution under fully stirring, pour in the mixed liquor A, form mixed liquid B;
(8) with Fluorinse under fully stirring, pour in the mixed liquid B, form mixed solution C;
(9) with sodium nitrate solution under fully stirring, pour among the mixed solution C, form mixed solution D;
(10) with the volume of 1 liter of mixed solution D adding distil water dilution;
(11) obtain molybdate and phosphate conversion solution with filter paper filtering;
(12) regulate pH to 3.8 with Glacial acetic acid.
Method based on the formation conversion film of magnesium-lithium alloy molybdate of the present invention and phosphate conversion solution is:
(1) magnesium lithium alloy is polished, and the ultrasonic oil removing of acetone adopts the oxalic acid of 10g/L to carry out pickling then, and temperature is a room temperature, time 5min;
(2) will clean with warm water through the magnesium lithium alloy after step (1) processing, clean with flowing water again, dry up;
(3) will put into 160g/L phosphoric acid through the magnesium lithium alloy of step (2), the 90g/L ammonium hydrogen fluoride solution activates, temperature is a room temperature, time 2min;
(4) will clean with flowing water through the magnesium lithium alloy after step (3) activation, dry up;
(5) regulate the pH to 3.8 of molybdate and phosphate conversion solution with Glacial acetic acid;
(6) slowly molybdate and phosphate conversion solution are warming up to 50 ℃;
(7) will put into molybdate and phosphate conversion solution carries out conversion processing through the magnesium lithium alloy after the step (4), and in conversion process, constantly shake magnesium lithium alloy, and make the hydrogen desorption that is adsorbed on specimen surface, transformation time is 15min;
(8) magnesium lithium alloy after molybdate and the phosphate conversion is taken out, fully wash, oven dry with flowing water;
Described molybdate and phosphate conversion solution are the mixed solutions that adopts following method to obtain:
1) Sodium orthomolybdate 30-40g fully dissolves with a small amount of distilled water, obtains sodium molybdate solution;
2) SODIUM PHOSPHATE, MONOBASIC 51.0-51.6g fully dissolves with a small amount of distilled water, obtains sodium dihydrogen phosphate;
3) Trisodium Citrate 4-5g fully dissolves with a small amount of distilled water, obtains sodium citrate solution;
4) Sodium Fluoride 3-4g fully dissolves with a small amount of distilled water, obtains Fluorinse;
5) SODIUMNITRATE 1g fully dissolves with a small amount of distilled water, obtains sodium nitrate solution;
6) with sodium dihydrogen phosphate under fully stirring, pour in the sodium molybdate solution, obtain mixed liquor A;
7) with sodium citrate solution under fully stirring, pour in the mixed liquor A, form mixed liquid B;
8) with Fluorinse under fully stirring, pour in the mixed liquid B, form mixed solution C;
9) with sodium nitrate solution under fully stirring, pour among the mixed solution C, form mixed solution D;
10) with the volume of 1 liter of mixed solution D adding distil water dilution;
11) obtain molybdate and phosphate conversion solution with filter paper filtering;
12) regulate pH to 3.8 with Glacial acetic acid.
The invention provides a kind of novel can make corrosion current reduce by five orders of magnitude with the molybdate of Glacial acetic acid regulator solution pH value and phosphate conversion solution and with the method for the formation conversion film of molybdate and phosphate conversion solution.The present invention is a kind of favorable anti-corrosion effect, environmental friendliness, alloy is had the evenly treatment process of resistance to corrosion, and molybdate-phosphate conversion solution of obtaining of this invention has good recycle and be worth, and can be good at reducing the production application cost.
The present invention adopts Sodium orthomolybdate as main salt (it is the main membrane-forming agent that forms molybdate in the composite membrane), SODIUM PHOSPHATE, MONOBASIC is as less important main salt (it is the main membrane-forming agent that forms phosphate layer in the composite membrane), citric acid is as coordination agent, Sodium Fluoride is as accelerator, SODIUMNITRATE is as promotor, and agent is mixed with molybdate and phosphate conversion solution as pH regulator with Glacial acetic acid.Become blue when this molybdate conversion fluid uses, show that Sodium orthomolybdate is reduced, after placement for some time, conversion fluid becomes water white again again, can utilize again again.
The molybdate that forms on the magnesium lithium alloy-phosphate conversion film is brownish black, cluster of grains by reunion shape on sheet basement membrane of combining closely with matrix and the basement membrane is formed, tiny segmentation crack is arranged on the film, molybdate-phosphate conversion film is more even, smooth, fine and close, complete, bigger to the level of coverage of matrix.The thickness of molybdate-phosphate conversion film is about 2 μ m, and molybdate-phosphate conversion film mainly contains Mo, P and Mg, and wherein, the content of Mo is 18%～29%, and the content of P is 35%～45%.Orthogonal experiments shows that pH value of solution is topmost influence factor, secondly is temperature, is the time once more.
The corrosion potential of magnesium lithium alloy matrix is-1.576V, and the corrosion potential of chromate conversion coating is-1.502V, and the corrosion potential of molybdate-phosphate conversion film just moves on to-0.876V, has improved 700mV than matrix, has improved 626mV than chromate conversion coating.After molybdate-phosphate conversion, the corrosion current of magnesium lithium alloy is than matrix 5 orders of magnitude that descended, by 1.391 * 10
-3Acm
-2Be reduced to 1.680 * 10
-8Acm
-2, Linear Polarization Resistance has then increased 82837 times simultaneously.The corrosion current of magnesium-lithium alloy molybdate-phosphate conversion film is than chromate conversion coating three orders of magnitude that descended.The membrane resistance of molybdate-phosphate conversion film is 15520 Ω, and electrochemical reaction resistance is 36.28 Ω.Molybdate-phosphate conversion film is at the crown height of the low frequency range crown height much larger than matrix and chromate conversion coating, thereby the alternating-current impedance of explanation molybdate-phosphate conversion film is much larger than matrix and chromate conversion coating.Steady potential was about-1.35V when magnesium lithium alloy transformed in molybdate-phosphate conversion solution.The fractograph analysis result shows that molybdate-phosphate conversion film and magnesium lithium alloy matrix bond are tight.
This method preparation cost is low, and preparation steps is few, and is simple to operate, and the reaction conditions gentleness has improved the corrosion resisting property of magnesium lithium alloy largely, and environmental protection and energy saving need the condition of control few and be easy to accomplish, get a good chance of being applied to scale operation.
Description of drawings
Fig. 1 a-Fig. 1 e is molybdate and the SEM image of phosphate conversion film under different amplification, wherein Fig. 1 a * 150; Fig. 1 b * 500; Fig. 1 c * 1000; Fig. 1 d * 3000; Fig. 1 e * 5000.
Fig. 2 is the polarization curve of magnesium lithium alloy in 3.5%NaCl solution, wherein 1 magnesium lithium alloy matrix; 2 chromate conversion coatings; 3 magnesium-lithium alloy molybdates-phosphate conversion film.
Fig. 3 is EIS figure, and wherein Fig. 3 a is the EIS figure of magnesium lithium alloy matrix and chromate conversion coating and molybdate and phosphate conversion film; Fig. 3 b is the anterior enlarged view of Fig. 3 a.
Fig. 4 is the equivalent-circuit diagram of alternating-current impedance spectrogram.
Fig. 5 is a spot test, wherein a) matrix; B) chromate conversion coating; C) molybdate-phosphate conversion film.
Fig. 6 is the cyclic voltammetry curve of magnesium lithium alloy in molybdate and phosphate conversion solution.
Fig. 7 is the open circuit potential-time curve of magnesium lithium alloy in the molybdate conversion fluid.
Fig. 8 is the line analysis of rete section.
The table 1 of Fig. 9 is the electron spectroscopy analysis analytical results corresponding to A place and B place among magnesium-lithium alloy molybdate and the phosphate conversion film electron scanning micrograph Fig. 1 c.
The table 2 of Figure 10 is the analytical data of polarization curve.
The table 3 of Figure 11 is the match numerical value of each original paper in the equivalent-circuit diagram.
The table 4 of Figure 12 is each element average content of energy spectrum analysis.
Embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
Present embodiment provides a kind of easy and simple to handle, mild condition, energy-conservation, toxic is little and with low cost can improve by a relatively large margin magnesium lithium alloy corrosion proof a kind of be the novel method of the molybdate-phosphate conversion membrane prepare of the magnesium lithium alloy of pH regulator agent with the Glacial acetic acid.
A) magnesium lithium alloy sample polishing, the ultrasonic oil removing of acetone adopts the oxalic acid of 10g/L to carry out pickling then, and temperature is a room temperature, time 5min;
B) will be through A) after sample clean with warm water, clean with flowing water again, dry up;
C) will be through B) sample put into 160g/L phosphoric acid, the 90g/L ammonium hydrogen fluoride solution activates, temperature is a room temperature, time 2min;
D) will be through C) sample after the activation cleans with flowing water, dries up;
E) will be through D) after sample molybdate-phosphate conversion solution of putting into the Glacial acetic acid magnesium lithium alloy that is the pH regulator agent carry out conversion processing.
Glacial acetic acid is the compound method and the technological specification following (experiment agents useful for same and distilled water are analytical pure) of the molybdate-phosphate conversion solution of the magnesium lithium alloy of pH regulator agent
1) getting Sodium orthomolybdate 40g/L fully dissolves with a small amount of distilled water;
2) getting SODIUM PHOSPHATE, MONOBASIC 51.6g/L fully dissolves with a small amount of distilled water;
3) getting Trisodium Citrate 5g/L fully dissolves with a small amount of distilled water;
4) getting Sodium Fluoride 4g/L fully dissolves with a small amount of distilled water;
5) getting SODIUMNITRATE 1g/L fully dissolves with a small amount of distilled water;
6) with 2) under fully stirring, pour 1 into) in;
7) with 3) under fully stirring, pour in the formed solution of step 6);
8) with 4) under fully stirring, pour in the formed solution of step 7);
9) with 5) under fully stirring, pour in the formed solution of step 8);
10) the formed solution of step 9) is poured in the volumetric flask, adding distil water is diluted to the volume of regulation;
11) with filter paper filtering molybdate-phosphate conversion solution;
12) regulate pH to 3.8 with Glacial acetic acid;
13) slowly molybdate-phosphate conversion solution is warming up to 50 ℃;
14) with carrying out conversion processing in magnesium lithium alloy sample immersion bimolybdate-phosphate conversion solution of handling well, in conversion process, constantly shake sample, make the hydrogen desorption that is adsorbed on specimen surface.Transformation time is 15min;
15) the magnesium lithium alloy sample after molybdate-phosphate conversion is taken out, fully wash, oven dry with flowing water.
The present invention adopts Sodium orthomolybdate as main salt, and SODIUM PHOSPHATE, MONOBASIC is as less important main salt, and citric acid is as coordination agent, and Sodium Fluoride is as accelerator, and SODIUMNITRATE is as promotor, and is formulated as the pH regulator agent with Glacial acetic acid.The optimised process standard that the present invention obtains is: Sodium orthomolybdate 40g/L, SODIUM PHOSPHATE, MONOBASIC 51.6g/L, citric acid 5g/L, Sodium Fluoride 4g/L, SODIUMNITRATE 1g/L, with Glacial acetic acid as the pH regulator agent, pH=3.8,50 ℃ of invert points, transformation time 15min.Molybdate-phosphate layer is big to the magnesium lithium alloy surface coverage, and than even compact, has increased substantially the solidity to corrosion of matrix.The present invention is simple for process, and film formation time is short, and cost is low, and is little to the influence of magnesium lithium alloy fatigue property, low to the basic material requirement, is not subjected to the influence of basic material.
Fig. 1 is the SEM image of molybdate-phosphate conversion film under different amplification, from Fig. 1 a as can be seen the magnesium lithium alloy surface coverage one deck molybdate-phosphate conversion rete uniformly.The rete microscopic appearance divides two portions: one deck is the basement membrane that almost completely covers on the matrix, and another layer is not exclusively to cover the epilamellar particulate state film that is the reunion shape.Have gully and crackle in the rete, these crackles may be the dispose procedure of hydrogen in molybdate-phosphate conversion or handle after form in the process that dehydrates.
See Table 1 corresponding to the magnesium-lithium alloy molybdate-A place of phosphate conversion film electron scanning micrograph Fig. 1 c and the electron spectroscopy analysis analytical results at B place.As can be seen from Table 1, the principal element in molybdate-phosphate conversion film has Mo, P and Mg.In these elements, Mg mainly is the dissolving from the magnesium lithium alloy matrix, and P, Mo are then from molybdate-phosphate conversion solution.
The polarization curve test result that Fig. 2 closes molybdate-phosphate conversion film, magnesium lithium alloy chromate conversion coating and magnesium lithium alloy matrix for the magnesium lithium, concrete tracing analysis data see Table 2.
Fig. 3 is magnesium lithium alloy matrix, chromate conversion coating and the molybdate-ac impedance spectroscopy of phosphate conversion film in 3.5wt.%NaCl solution, molybdate-phosphate conversion film is at the crown height of the low frequency range crown height much larger than matrix and chromate conversion coating as seen from Figure 3, thereby the alternating-current impedance of explanation molybdate-phosphate conversion film is much larger than matrix and chromate conversion coating.
Adopt equivalent-circuit diagram as shown in Figure 4 to come match molybdate-phosphate conversion membrane electrochemical impedance spectrogram.Wherein, R
SolRepresent the solution resistance between reference electrode and the working electrode, R
tAnd C
dRepresent electrochemical reaction resistance and electric double layer capacitance respectively, R
fAnd C
fRepresent the membrane capacitance and the membrane resistance of conversion film respectively.
The match numerical value of each original paper sees Table 3 in the equivalent-circuit diagram, and the membrane resistance that therefrom can find magnesium-lithium alloy molybdate-phosphate conversion film is much larger than electrochemical reaction resistance.
The compound method of some dropping liquid is as follows: (1) weighing 13.4g sulfuric acid, dissolving; (2) weighing 3g sodium dichromate 99, dissolving; (3) pour solution (2) into solution (1), add water to 100mL.Use a dropping point dropping liquid respectively behind magnesium lithium alloy matrix, chromate conversion coating, molybdate-phosphate conversion film surface drop 30s, each surperficial macro morphology as shown in Figure 5.The corrosion pit maximum of observing on the magnesium lithium alloy matrix is the darkest, taking second place on the chromate conversion coating, the most shallow minimum of corrosion pit on molybdate-phosphate conversion film.The diameter of corrosion pit is respectively: 1.64cm, 1.16cm, 0.74cm.The degree of depth of corrosion pit reduces successively, and the corrosion pit of molybdate-phosphate conversion film is shallow especially.This shows that the solidity to corrosion of molybdate-phosphate conversion film is higher than chromate conversion coating and matrix.
Fig. 6 is the cyclic voltammetry curve of magnesium lithium alloy in molybdate-phosphate conversion solution.Forward stagnates and encircles the formation of explanation magnesium lithium alloy superficial film as seen from the figure.
For the process of growth of online simulation molybdate-phosphate conversion film, do the open circuit potential-time curve of magnesium lithium alloy in molybdate-phosphate conversion solution as shown in Figure 7.As seen from Figure 7, in the initial moment of chemical conversion, current potential is shuffled very fast, illustrate in conversion fluid, to react the indissoluble thing that is generated and be deposited on the magnesium lithium alloy surface rapidly this moment, and be the elementary formation stage of conversion film.Current potential increases and begins to become slow when current potential arrival-1.45V, this moment, alloy surface had some places to have rete, the indissoluble thing amount of separating out increases, coverage to matrix increases gradually, it is the developmental stage of a film, after transformation time reaches 500s, electropotential reach change over time behind the more stable numerical value little.The molybdate conversion film has covered whole alloy surface, forms fine and close rete, and from current potential-time curve analysis as can be known, 10min left and right sides film forming finishes substantially.
Fig. 8 is the line analysis result of molybdate-phosphate conversion film rete.Wherein, label is that 1 line is carbon peak (from the resin inlay), label be 2 lines be the magnesium peak, label is that 3 line is oxygen peak (from the resin inlay), label is that 4 line is the aluminium peak, label is that 5 line is the molybdenum peak.As can be seen from the figure thicknesses of layers is about 2 μ m, and rete and magnesium lithium alloy basal body binding force are good.Each element average content of energy spectrum analysis sees Table 4.
Claims (2)
1. magnesium-lithium alloy molybdate and phosphate conversion solution is characterized in that it being the mixed solution that adopts following method to obtain:
(1) Sodium orthomolybdate 30-40g fully dissolves with a small amount of distilled water, obtains sodium molybdate solution;
(2) SODIUM PHOSPHATE, MONOBASIC 51.0-51.6g fully dissolves with a small amount of distilled water, obtains sodium dihydrogen phosphate;
(3) Trisodium Citrate 4-5g fully dissolves with a small amount of distilled water, obtains sodium citrate solution;
(4) Sodium Fluoride 3-4g fully dissolves with a small amount of distilled water, obtains Fluorinse;
(5) SODIUMNITRATE 1g fully dissolves with a small amount of distilled water, obtains sodium nitrate solution;
(6) with sodium dihydrogen phosphate under fully stirring, pour in the sodium molybdate solution, obtain mixed liquor A;
(7) with sodium citrate solution under fully stirring, pour in the mixed liquor A, form mixed liquid B;
(8) with Fluorinse under fully stirring, pour in the mixed liquid B, form mixed solution C;
(9) with sodium nitrate solution under fully stirring, pour among the mixed solution C, form mixed solution D;
(10) with the volume of 1 liter of mixed solution D adding distil water dilution;
(11) obtain molybdate and phosphate conversion solution with filter paper filtering;
(12) regulate pH to 3.8 with Glacial acetic acid.
2. method based on the formation conversion film of described magnesium-lithium alloy molybdate of claim 1 and phosphate conversion solution is characterized in that:
(1) magnesium lithium alloy is polished, and the ultrasonic oil removing of acetone adopts the oxalic acid of 10g/L to carry out pickling then, and temperature is a room temperature, time 5min;
(2) will clean with warm water through the magnesium lithium alloy after step (1) processing, clean with flowing water again, dry up;
(3) will put into 160g/L phosphoric acid through the magnesium lithium alloy of step (2), the 90g/L ammonium hydrogen fluoride solution activates, temperature is a room temperature, time 2min;
(4) will clean with flowing water through the magnesium lithium alloy after step (3) activation, dry up;
(5) regulate the pH to 3.8 of molybdate and phosphate conversion solution with Glacial acetic acid;
(6) slowly molybdate and phosphate conversion solution are warming up to 50 ℃;
(7) will put into molybdate and phosphate conversion solution carries out conversion processing through the magnesium lithium alloy after the step (4), and in conversion process, constantly shake magnesium lithium alloy, and make the hydrogen desorption that is adsorbed on specimen surface, transformation time is 15min;
(8) magnesium lithium alloy after molybdate and the phosphate conversion is taken out, fully wash, oven dry with flowing water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101535142A CN101805900B (en) | 2010-04-23 | 2010-04-23 | Magnesium-lithium alloy molybdate and phosphate conversion solution and method for forming conversion coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101535142A CN101805900B (en) | 2010-04-23 | 2010-04-23 | Magnesium-lithium alloy molybdate and phosphate conversion solution and method for forming conversion coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101805900A CN101805900A (en) | 2010-08-18 |
| CN101805900B true CN101805900B (en) | 2011-09-14 |
Family
ID=42607854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101535142A Expired - Fee Related CN101805900B (en) | 2010-04-23 | 2010-04-23 | Magnesium-lithium alloy molybdate and phosphate conversion solution and method for forming conversion coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101805900B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451628A (en) * | 2014-12-08 | 2015-03-25 | 江阴宝易德医疗科技有限公司 | Magnesium alloy chemical conversion treatment solution and method for treating surface of magnesium alloy |
| CN113264753B (en) * | 2021-06-03 | 2023-02-03 | 哈尔滨工程大学 | Preparation method of heating-free short silicon carbide fiber reinforced phosphate composite material |
| CN115627467A (en) * | 2022-10-18 | 2023-01-20 | 航天科工(长沙)新材料研究院有限公司 | Magnesium-lithium alloy surface treatment method and chemical oxidation solution |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100543182C (en) * | 2007-04-09 | 2009-09-23 | 湖南大学 | The preparation method of magnesium-alloy surface molybdate phosphate composite transferring film |
-
2010
- 2010-04-23 CN CN2010101535142A patent/CN101805900B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101805900A (en) | 2010-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102199766B (en) | Method for preparing magnesium lithium alloy cerium salt and molybdate-phosphate-zirconium fluoride conversion coating | |
| CN101760733B (en) | Magnesium alloy chemical nickel-plating surface treatment method taking microarc oxidation process as pretreatment | |
| CN106149026A (en) | The preparation of a kind of Graphene/golden nanometer particle composite and characterizing method | |
| CN104087801B (en) | A kind of Corrosion-resistant magnesia alloy and improve the method for its corrosion resistance | |
| Luo et al. | Synergistic construction of bifunctional interface film on anode via a novel hybrid additive for enhanced alkaline Al-air battery performance | |
| CN101476146A (en) | Method for preparing black ceramic membrane by magnesium alloy differential arc oxidation | |
| CN103296283B (en) | Titanium plate with surface being wrapped by Ti4O7 (titanium oxide) membrane and substrate of bipolar lead-acid battery | |
| CN101805900B (en) | Magnesium-lithium alloy molybdate and phosphate conversion solution and method for forming conversion coating | |
| CN103173836A (en) | Magnesium alloy microarc oxidation low energy consumption black ceramic coating and preparation method thereof | |
| Yang et al. | Electrochemical behavior of rolled Pb–0.8% Ag anodes in an acidic zinc sulfate electrolyte solution containing Cl− ions | |
| CN104232808B (en) | graphene oxide and trivalent chromium complex tanning agent and preparation method thereof | |
| CN107740168A (en) | A kind of efficient corrosion resisting Zinc phosphating solution and preparation method thereof | |
| CN104404511A (en) | Preparation method of dopamine biomass anti-corrosive film on magnesium alloy surface | |
| CN102212864A (en) | Method for modifying electrolysis phosphorization membrane | |
| CN109440166A (en) | A kind of magnesium lithium alloy surface raising wear resistance and corrosion resistance micro-arc oxidation compound treatment method | |
| CN106810710A (en) | A kind of preparation method of super-hydrophobic Graphene/polyurethane sponge | |
| Li et al. | Study on electrochemical properties of lead calcium tin anode for hydrometallurgy | |
| CN108796583B (en) | A kind of preparation method of the super-hydrophobic passivating film of Pure Iron Surface corrosion resistance | |
| CN101691648A (en) | Solution for steel quick micro-arc carbonitriding and carbonitriding method | |
| CN104611679B (en) | Nanocrystalline ZrC/Zr composite coatings of one proton exchanging film fuel battery titanium alloy bipolar plates and preparation method thereof | |
| CN104651820A (en) | Ultrasonic phosphating solution for carbon steel, preparation method thereof and method for phosphating carbon steel by adopting phosphating solution | |
| CN116040754A (en) | Preparation method and application of Cu/Pd-C composite electrode based on electrodeposition technology | |
| Zhao et al. | Interphase Modulated Early‐Stage Zn Electrodeposition Mechanism | |
| CN103184447B (en) | Aluminum and aluminum alloy surface self-repairing and corrosion-resisting conversion coating and preparation method thereof | |
| CN108179408A (en) | A kind of cobalt salt chemical conversion solution and its application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20170423 |