CN109536941A - AZ31B magnesium alloy golden yellow conversion film treating agent and AZ31B surface treatment method of Mg alloy - Google Patents
AZ31B magnesium alloy golden yellow conversion film treating agent and AZ31B surface treatment method of Mg alloy Download PDFInfo
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- CN109536941A CN109536941A CN201811223354.7A CN201811223354A CN109536941A CN 109536941 A CN109536941 A CN 109536941A CN 201811223354 A CN201811223354 A CN 201811223354A CN 109536941 A CN109536941 A CN 109536941A
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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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/57—Treatment of magnesium or alloys based thereon
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Abstract
A kind of AZ31B magnesium alloy golden yellow conversion film treating agent and AZ31B surface treatment method of Mg alloy, AZ31B magnesium alloy golden yellow conversion film treating agent, each component including following concentration: 98% sulfuric acid, 1 grams per liter~25 grams per liters；50% manganese nitrate, 1 grams per liter~25 grams per liters；1 grams per liter of potassium permanganate~25 grams per liters；0.1 grams per liter of metavanadate~1 grams per liter；0.01 ml l~0.05 ml l of dispersing agent；Surplus is water.Above-mentioned AZ31B magnesium alloy golden yellow conversion film treating agent after being applied to the processing of AZ31B Mg alloy surface, can form one layer of golden yellow conversion film in AZ31B Mg alloy surface, can be improved the corrosion resistance of AZ31B magnesium alloy.And the golden yellow conversion film formed has the advantages that adhesive force is good, salt fog performance is good and good at film uniformity.In addition, not phosphorous and chromium, the problem of often using phosphorus and chromium so as to avoid conventional alloys inorganic agent and pollute environment, will not generate pollution to environment, thus the feature of environmental protection is preferable.
Description
Technical field
The present invention relates to technical field of surface, convert film process more particularly to a kind of AZ31B magnesium alloy golden yellow
Agent and AZ31B surface treatment method of Mg alloy.
Background technique
Magnesium alloy can be divided into two major classes by manufacturing process magnesium alloy: wrought magnesium alloy and cast magnesium alloy.AZ31B magnesium alloy
Belong to wrought magnesium alloy, compared with cast magnesium alloy, AZ31B wrought magnesium alloy has higher intensity, better plasticity, mainly
For thin plate, extrusion and forging etc..
For AZ31B magnesium alloy as a kind of high-strength magnesium alloy, specific strength has been more than 6063 high-intensitive aluminium alloys, as long as
Key issues of solving the molding of AZ31B magnesium alloy deformation, surface anticorrosive, it is most likely that substantial portion of Al-alloy products can be adopted
With AZ31B magnesium alloy, the revolution again after aluminium alloy can be brought for Material Field.But AZ31B magnesium alloy is in air
Corrosion resistance is excessively poor, limits application.
AZ31B magnesium alloy chemical activity is high, untapped so far to go out to compare the environmentally friendly conversion film treating agent of good corrosion resistance.
Therefore working as chemical conversion treatment will be become by developing AZ31B Mg alloy surface environment-friendly type conversion coating treating fluid and treatment process
The urgency and inexorable trend of business.
Summary of the invention
Based on this, it is necessary to provide a kind of corrosion resistance that can be improved AZ31B magnesium alloy and the feature of environmental protection is preferable
AZ31B magnesium alloy golden yellow conversion film treating agent and AZ31B surface treatment method of Mg alloy.
A kind of AZ31B magnesium alloy golden yellow conversion film treating agent, each component including following concentration:
AZ31B magnesium alloy golden yellow conversion film treating agent includes each component of following concentration in one of the embodiments:
AZ31B magnesium alloy golden yellow conversion film treating agent includes each component of following concentration in one of the embodiments:
The dispersing agent is neopelex, lauryl sodium sulfate, diethyl in one of the embodiments,
At least one of sodium hexy1 sulfate and sodium methylene bis-naphthalene sulfonate.
In one of the embodiments, the metavanadate be sodium metavanadate, potassium metavanadate and ammonium metavanadate at least
It is a kind of.
The water is deionized water in one of the embodiments,.
The pH of the AZ31B magnesium alloy golden yellow conversion film treating agent uses sodium hydroxide in one of the embodiments,
Solution is adjusted to 1.5.
A kind of AZ31B surface treatment method of Mg alloy, including using AZ31B magnesium alloy described in any embodiment as above
Golden yellow conversion film treating agent carries out conversion film process.
AZ31B surface treatment method of Mg alloy includes the following steps: in one of the embodiments,
AZ31B magnesium alloy is subjected to degreasing degreasing processing；
It will treated that the AZ31B magnesium alloy carries out pickling etching process by the degreasing degreasing；
The AZ31B magnesium alloy after the pickling etching process is put into table adjustment at carry out table tune bleaching
Reason；
The AZ31B magnesium alloy after the table tune bleaching is put into AZ31B magnesium alloy golden yellow conversion film
Chemical conversion film process is carried out in inorganic agent, wherein the AZ31B magnesium alloy golden yellow conversion film treating agent is any reality as above
Apply AZ31B magnesium alloy golden yellow conversion film treating agent described in example；
Closing washing process will be carried out by the AZ31B magnesium alloy after the chemical conversion film process；
The AZ31B magnesium alloy after the closing washing process is subjected to drying and processing.
In one embodiment, AZ31B magnesium alloy is put into progress degreasing degreasing processing in degreasing agent.
Above-mentioned AZ31B magnesium alloy golden yellow conversion film treating agent, after being applied to the processing of AZ31B Mg alloy surface, Neng Gou
AZ31B Mg alloy surface forms one layer of golden yellow conversion film, can be improved the corrosion resistance of AZ31B magnesium alloy.And formed
Golden yellow conversion film has the advantages that adhesive force is good, salt fog performance is good and good at film uniformity.In addition, above-mentioned AZ31B magnesium closes
Golden golden yellow conversion film treating agent, not phosphorous and chromium often use phosphorus and chromium so as to avoid conventional alloys inorganic agent and pollute environment
The problem of, pollution will not be generated to environment, thus the feature of environmental protection is preferable.
Detailed description of the invention
Fig. 1 is the step schematic diagram of the AZ31B surface treatment method of Mg alloy of one embodiment of the invention.
Specific embodiment
To facilitate the understanding of the present invention, in order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, under
In conjunction with attached drawing, specific embodiments of the present invention will be described in detail in face.It is explained in the following description many details
To facilitate a thorough understanding of the present invention, giving better embodiment of the invention in attached drawing.But the present invention can be with many not
With form realize, however it is not limited to embodiments described herein.On the contrary, the purpose of providing these embodiments is that making
It makes the present disclosure more fully understandable.The present invention can be to be much different from other way described herein
Implement, those skilled in the art can make similar improvements without departing from the spirit of the invention, therefore the present invention not by
The limitation of following public specific embodiment.In addition, term " first ", " second " are used for description purposes only, and should not be understood as
Indication or suggestion relative importance or the quantity for implicitly indicating indicated technical characteristic." first ", " are defined as a result,
Two " feature can explicitly or implicitly include at least one of the features.In the description of the present invention, the meaning of " plurality " is
At least two, such as two, three etc., unless otherwise specifically defined.In the description of the present invention, the meaning of " several "
It is at least one, such as one, two etc., unless otherwise specifically defined.Unless otherwise defined, institute used herein
Some technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.Institute herein
The term used is only for the purpose of describing specific embodiments, it is not intended that in the limitation present invention.It is used herein
Term " and/or " it include any and all combinations of one or more related listed items.
For example, a kind of AZ31B magnesium alloy golden yellow conversion film treating agent, each component including following concentration:
Above-mentioned AZ31B magnesium alloy golden yellow conversion film treating agent, by using 98% sulfuric acid, 1 grams per liter~25 grams per liters；
50% manganese nitrate, 1 grams per liter~25 grams per liters；1 grams per liter of potassium permanganate~25 grams per liters；0.1 grams per liter of metavanadate~1 grams per liter；Point
0.01 ml l~0.05 ml l of powder；Surplus is water, can be in AZ31B after being applied to the processing of AZ31B Mg alloy surface
Mg alloy surface forms one layer of golden yellow conversion film, can be improved the corrosion resistance of AZ31B magnesium alloy.And the golden yellow formed
Conversion film has the advantages that adhesive force is good, salt fog performance is good and good at film uniformity.In addition, above-mentioned AZ31B magnesium alloy is golden yellow
Color conversion film treating agent, not phosphorous and chromium will not generate pollution to environment, thus the feature of environmental protection is preferable.
It should be noted that through it has been found that by the concentration of 98% sulfuric acid lower than 5 grams per liters and by 50% manganese nitrate
It is corrosion-resistant poor with salt spray resistance ability in the conversion film that AZ31B Mg alloy surface is formed when concentration is lower than 1 grams per liter.And when 98%
It when sulfuric acid is higher than 25 grams per liters and 50% manganese nitrate higher than 25 grams per liter, forms a film in AZ31B Mg alloy surface loose porous, so that turning
It is uneven to change the attachment of film adhesive force, it is corrosion-resistant poor with salt spray resistance ability.By by 98% sulfuric acid, 5 grams per liter~25 grams per liters；
50% manganese nitrate, 1 grams per liter~25 grams per liters；Especially with 1 grams per liter of potassium permanganate~25 grams per liters；0.1 grams per liter~1 of metavanadate
Grams per liter；At 0.01 ml l~0.05 ml l of dispersing agent, form a film more in the conversion film that AZ31B Mg alloy surface is formed
Uniformly, adhesive force is good, and corrosion-resistant and salt spray resistance ability is preferable, can satisfy acidic fog resistance requirement, and corrosion resistant degree of corrosion is high.Especially need
It is noted that using the AZ31B magnesium alloy golden yellow conversion film treating agent of above-mentioned each component, not phosphorous, chromium, fluorine etc., thus
It not will cause the pollution of phosphorus, chromium, fluorine etc., thus the feature of environmental protection is preferable.
It should be noted that 50% manganese nitrate is the manganese nitrate solution that mass concentration is 50%.98% sulfuric acid is as dense
Sulfuric acid, in practical application, 98% sulfuric acid also has 98.3% sulfuric acid of mark, is the sulfuric acid that mass fraction is 98.3%, that is, uses
The sulfuric acid that mass fraction is 98.3% is as 98% sulfuric acid.
It is to be particularly noted that golden yellow conversion film can be formed in AZ31B Mg alloy surface in the present embodiment,
It enables to AZ31B magnesium alloy that there is the appearance and gloss of likeness in form copper, to promote the corrosion resistance and appearance color of product, accords with
The market demand is closed, thus also there is great application value and commercial value.
The dispersing agent is neopelex, lauryl sodium sulfate, diethyl in one of the embodiments,
At least one of sodium hexy1 sulfate and sodium methylene bis-naphthalene sulfonate.It so, it is possible to play preferable peptizaiton.Pass through addition
0.01 ml l~0.05 ml l of dispersing agent, enable to above-mentioned AZ31B magnesium alloy golden yellow conversion film treating agent can
More fine and close conversion film is formed in AZ31B Mg alloy surface, it is preferable at film uniformity.It is described in one of the embodiments,
Metavanadate is at least one of sodium metavanadate, potassium metavanadate and ammonium metavanadate.It should be noted that metavanadic acid is not added
When salt and potassium permanganate, AZ31B Mg alloy surface is still remained because of liberation of hydrogen fast speed, and it is coarse loose porous film occur, into
And make salt spray resistance poor.In the present embodiment, by be added 1 gram of 0.1 grams per liter of metavanadate~1 grams per liter and potassium permanganate/
When rising~25 grams per liter, preferable slow releasing function can be played, so that liberation of hydrogen speed well, in AZ31B Mg alloy surface shape
At conversion film it is comparatively dense uniformly, and salt spray resistance ability and corrosion resistance are preferable.The water in one of the embodiments,
For deionized water.
In order to preferably play the chemical composition coating process performance of AZ31B magnesium alloy golden yellow conversion film treating agent, for example,
The AZ31B magnesium alloy golden yellow conversion film treating agent uses under conditions of pH value is 1.2~1.6；For another example, the AZ31B
Magnesium alloy golden yellow conversion film treating agent 10 DEG C~50 DEG C at a temperature of use, in this way, institute's AZ31B magnesium can be played preferably
The chemical composition coating process performance of alloy golden yellow conversion film treating agent.Preferably, AZ31B magnesium alloy golden yellow converts film process
The pH of agent is 1.5, is initial pH value in other words.It is to be particularly noted that using the AZ31B magnesium alloy of above-mentioned each component
Golden yellow conversion film treating agent, treatment temperature can be handled at a temperature of temperature is 10 DEG C~50 DEG C, this temperature is at me
The most of place of state, such as In Guangdong Province are temperature throughout the year almost in this spatial value, thus in conversion film process
In the process, it can be handled at normal temperature, be equivalent to the place that tradition needs to be adjusted to temperature under 50 degrees Celsius to 60 degrees Celsius
Temperature is managed, above-mentioned AZ31B magnesium alloy golden yellow conversion film treating agent can be handled at normal temperature, thus treatment process is more just
Victory, energy consumption are reduced, it is thus possible to reduce production cost.
It should be noted that AZ31B magnesium alloy described in each embodiment, chemical composition example in mass ratio are as follows: Al 2.5%
~3.5%, Zn 0.6%~1.4%, Mn 0.2%~1.0%, Si 0.08%, Ca 0.04%, Cu 0.01%, Fe
0.003%, Ni 0.001%, Mg are surplus.
Preferably, AZ31B magnesium alloy golden yellow conversion film treating agent includes each component of following concentration:
Through applicants have found that, using mass parts as above each component AZ31B magnesium alloy golden yellow convert film process
Agent, film forming adhesive force is more preferable, and salt spray resistance ability and corrosion resistance are more preferable.Using following experiment condition: being tried using salt fog
Tryoff carries out salt air corrosion test to sample in the NaCl atmosphere that mass fraction is 5%, enables to AZ31B magnesium alloy table
The golden yellow conversion film that face is formed can be salt spray resistance 35 hours or more, show it with preferable corrosion resistance.
It is furthermore preferred that AZ31B magnesium alloy golden yellow conversion film treating agent includes each component of following concentration:
Through applicants have found that, using mass parts as above each component AZ31B magnesium alloy golden yellow convert film process
Agent, film forming adhesive force is more preferable, and salt spray resistance ability and corrosion resistance are more preferable.Using following experiment condition: being tried using salt fog
Tryoff carries out salt air corrosion test to sample in the NaCl atmosphere that mass fraction is 5%, enables to AZ31B magnesium alloy table
The golden yellow conversion film that face is formed can be salt spray resistance 40 hours or more, show it with preferable corrosion resistance.
In order to further increase the salt spray resistance ability of AZ31B magnesium alloy golden yellow conversion film treating agent, in an embodiment, institute
State the component that AZ31B magnesium alloy golden yellow conversion film treating agent further includes following concentration: 0.5 grams per liter~1.2 of nano magnesia
Grams per liter, wherein the diameter of nano magnesia is 50 nanometers.Through applicants have found that, by addition 0.5 gram of nano magnesia/
~1.2 grams per liters are risen, the golden yellow conversion film more dense uniform formed in AZ31B Mg alloy surface is enabled to, are seen in Electronic Speculum
It examines down, hole can be reduced, so that conversion film more dense uniform, so as to further increase AZ31B magnesium alloy
Salt spray resistance ability and corrosion resistance.
One preferred embodiment is that AZ31B magnesium alloy golden yellow conversion film treating agent includes each component of following concentration:
Through applicants have found that, using mass parts as above each component AZ31B magnesium alloy golden yellow convert film process
Agent, film forming adhesive force is more preferable, and salt spray resistance ability and corrosion resistance are more preferable.Using following experiment condition: being tried using salt fog
Tryoff carries out salt air corrosion test to sample in the NaCl atmosphere that mass fraction is 5%, enables to AZ31B magnesium alloy table
The golden yellow conversion film that face is formed can be salt spray resistance 42 hours or more, show it with preferable corrosion resistance.It needs to illustrate
, after adding nano magnesia, in the film forming for the AZ31B magnesium alloy that AZ31B Mg alloy surface is formed, hole becomes smaller, that
It is because nano magnesia has certain sealing process to hole, and nano magnesia is embedded in after hole, so that conversion film is more
Densification, and then corrosive ion and water is prevented to penetrate into film layer.However, the additive amount of nano magnesia be also not it is more more more
Good, addition is more, forms also tool to conversion film and has a certain impact, and is easy to influence the adhesive force of the film layer of conversion film.Pass through
It is 0.5 grams per liter~1.2 grams per liters by the concentration control of nano magnesia, lower than 0.5 grams per liter or is higher than 1.2 grams per liters, it can be right
Film adhesion or corrosion resistance tool have a certain impact.
One preferred embodiment is that AZ31B magnesium alloy golden yellow conversion film treating agent includes each group of following concentration
Point:
Through applicants have found that, using mass parts as above each component AZ31B magnesium alloy golden yellow convert film process
Agent, film forming adhesive force is more preferable, and salt spray resistance ability and corrosion resistance are more preferable.Using following experiment condition: being tried using salt fog
Tryoff carries out salt air corrosion test to sample in the NaCl atmosphere that mass fraction is 5%, enables to AZ31B magnesium alloy table
The golden yellow conversion film that face is formed can be salt spray resistance 45 hours or more, show it with preferable corrosion resistance.
Above-mentioned AZ31B magnesium alloy golden yellow conversion film treating agent, by using 98% sulfuric acid, 5 grams per liter~25 grams per liters；
50% manganese nitrate, 1 grams per liter~25 grams per liters；1 grams per liter of potassium permanganate~25 grams per liters；0.1 grams per liter of metavanadate~1 grams per liter；Point
0.01 ml l~0.05 ml l of powder；Surplus is water, can be in AZ31B after being applied to the processing of AZ31B Mg alloy surface
Mg alloy surface forms one layer of golden yellow conversion film, can be improved the corrosion resistance of AZ31B magnesium alloy.And the golden yellow formed
Conversion film has the advantages that adhesive force is good, salt fog performance is good and good at film uniformity.In addition, above-mentioned AZ31B magnesium alloy is golden yellow
Color conversion film treating agent, not phosphorous and chromium will not generate pollution to environment, thus the feature of environmental protection is preferable.
The present invention also provides a kind of AZ31B surface treatment method of Mg alloy, including using described in any embodiment as above
AZ31B magnesium alloy golden yellow conversion film treating agent carry out conversion film process.
AZ31B surface treatment method of Mg alloy includes the following steps: in one of the embodiments,
S110: AZ31B magnesium alloy is subjected to degreasing degreasing processing；
In the present embodiment, by the way that AZ31B magnesium alloy is carried out degreasing degreasing processing, produced with removing AZ31B magnesium alloy
The release agent that surface is adhered in journey.In one embodiment, AZ31B magnesium alloy is put into degreasing agent and is carried out at degreasing degreasing
Reason.For example, the release agent includes each component of following mass parts: 10 grams per liter of sodium hydroxide, 20 grams per liter of sodium tripolyphosphate, partially
5 grams per liter of sodium metasilicate, 2 grams per liter of sodium gluconate, 1.25 grams per liter of OP-10 emulsifier, 1 grams per liter of K12 anion active agent.Such as
This can preferably remove the release agent of AZ31B Mg alloy surface using the release agent of each component of mass parts as above, so that
The conversion film adhesive force that subsequent AZ31B magnesium alloy is formed in conversion film treatment process is preferable.For example, AZ31B magnesium alloy is put
The temperature for entering to carry out degreasing degreasing processing in degreasing agent is 60 degrees Celsius, and the time is 6 minutes, so, it is possible preferably to be taken off
Rouge oil removal treatment.
S120: will treated that the AZ31B magnesium alloy carries out pickling etching process by the degreasing degreasing；
In the present embodiment, treated by will pass through the degreasing degreasing, and the AZ31B magnesium alloy carries out pickling etching
Processing, with impurity such as the oxides that removes AZ31B Mg alloy surface.For example, will that treated be described by the degreasing degreasing
AZ31B magnesium alloy is put into progress pickling etching process in etchant；For example, the etchant includes each group of following mass parts
Point: 50 ml ls and 0.2 ml l of low foaming surfactant of nitric acid.For example, the low foaming surfactant includes but unlimited
In EO/PO block polyether, Di-phosphorus pentonide derivative, ethoxylated fatty-acid methyl ester analog derivative and organic silicon modified by polyether
Class surfactant.In etchant by each component that above-mentioned mass parts are added, pickling etching process can be preferably carried out,
The impurity such as the oxide of AZ31B Mg alloy surface can preferably be removed.For example, the temperature of pickling etching process is 10 degrees Celsius
To 40 degrees Celsius, for another example, the time of pickling etching process is 30 seconds to 60 seconds.It so, it is possible preferably to carry out at pickling etching
Reason.It should be noted that carrying out pickling etching process using the etchant of each component of above-mentioned mass parts, pickling is enabled to lose
Quarter carries out at normal temperature, and pickling etching process is carried out especially under In Guangdong Province, room temperature, can reduce energy consumption.
S130: the AZ31B magnesium alloy after the pickling etching process is put into carry out table tune drift in table adjustment
White processing；
In the present embodiment, by the way that the AZ31B magnesium alloy after the pickling etching process is put into table adjustment
Table tune bleaching is carried out, to remove impurity micro in AZ31B Mg alloy surface, so that the face of AZ31B Mg alloy surface
Color is uniform.For example, it is 50 grams per liters~100 grams per liters sodium hydroxide that the table, which is adjusted, preferably carry out table tune drift so, it is possible
White processing.For example, the temperature of table tune bleaching is 60 degrees Celsius, the time is 5 minutes, so, it is possible preferably carry out table tune
Bleaching, with remove AZ31B magnesium alloy trace impurity formed grey matter so that AZ31B Mg alloy surface color compared with
To be uniform, conversion film process is carried out convenient for subsequent.
S140: the AZ31B magnesium alloy after the table tune bleaching is put into AZ31B magnesium alloy golden yellow and is turned
Change and carry out chemical conversion film process in film process agent, wherein the AZ31B magnesium alloy golden yellow conversion film treating agent is such as to take up an official post
One AZ31B magnesium alloy golden yellow conversion film treating agent as described in the examples；
In the present embodiment, closed by the way that the AZ31B magnesium alloy after the table tune bleaching is put into AZ31B magnesium
Chemical conversion film process is carried out in golden golden yellow conversion film treating agent, one layer of golden yellow can be formed in AZ31B Mg alloy surface
Conversion film can be improved the corrosion resistance of AZ31B magnesium alloy.And the golden yellow conversion film formed has that adhesive force is good, salt fog
Good and good at the film uniformity advantage of performance.In addition, above-mentioned AZ31B magnesium alloy golden yellow conversion film treating agent, it is not phosphorous and
Chromium will not generate pollution to environment, thus the feature of environmental protection is preferable.Golden yellow conversion film is formed in AZ31B Mg alloy surface, it can
So that AZ31B magnesium alloy has the appearance and gloss of likeness in form copper, thus also there is great application value and commercial value.
In the present embodiment, the pH of AZ31B magnesium alloy golden yellow conversion film treating agent is 1.5, the temperature of chemical conversion film process
Degree is room temperature, is 10 DEG C~50 DEG C in other words, the processing time is -35 seconds 25 seconds.Preferably, the temperature of chemical conversion film process
For room temperature, handling the time is -35 seconds 25 seconds.It so, it is possible preferably to carry out conversion film process.
S150: closing washing process will be carried out by the AZ31B magnesium alloy after the chemical conversion film process；
In the present embodiment, by the way that closing washing will be carried out by the AZ31B magnesium alloy after the chemical conversion film process
Processing plays certain sealing process come the hole on the conversion film that is formed after converting film process to AZ31B magnesium alloy, into
And make conversion film more stable.For example, sealer will be put into the AZ31B magnesium alloy after the chemical conversion film process
Middle carry out Seal treatment；For example, the sealer includes each component of following mass parts: 1~3 grams per liter of ammonium metavanadate, metavanadic acid
1~3 grams per liter of 1~3 grams per liter of sodium and ammonium metatungstate so, it is possible preferably to carry out Seal treatment.For example, the temperature of Seal treatment
Degree is room temperature, and the processing time is 3 minutes to 5 minutes.For another example, the room temperature in the present embodiment refers to 10 degrees Celsius -40 degrees Celsius
Temperature.
AZ31B magnesium alloy after Seal treatment is subjected to washing process, following oven is put into after washing.
S160: the AZ31B magnesium alloy after the closing washing process is subjected to drying and processing.
In order to preferably carry out drying and processing, for example, the drying and processing under the conditions of 130 DEG C~154 DEG C of temperature into
Row；For another example, the drying and processing continues 10 minutes~25 minutes, in this way, drying and processing can be carried out preferably.
In order to reduce the influence that each process mutually generates, so that whole pre-treatment effect is improved, for example, the degreasing removes
After oil processing, before the etching process, after the etching process, before the table tune bleaching, after the table tune bleaching；
It further include following steps before the drying: right before the chemical conversion film process and after the chemical conversion film process
The AZ31B magnesium alloy carries out adverse current water washing operations；For another example, the adverse current water washing operations are carried out using air stirring；For another example, exist
Under room temperature, carries out 3 times~5 times adverse currents and wash, in this way, it is possible to reduce the influence that each process mutually generates, to improve whole
Pre-treatment effect.
Above-mentioned AZ31B surface treatment method of Mg alloy, using above-mentioned AZ31B magnesium alloy golden yellow conversion film treating agent, energy
It is enough to form one layer of golden yellow conversion film in AZ31B Mg alloy surface, it can be improved the corrosion resistance of AZ31B magnesium alloy.And shape
At golden yellow conversion film have the advantages that adhesive force is good, salt fog performance is good and at film uniformity it is good.In addition, above-mentioned AZ31B
Magnesium alloy golden yellow conversion film treating agent, not phosphorous and chromium will not generate pollution to environment, thus the feature of environmental protection is preferable.In AZ31B
Mg alloy surface forms golden yellow conversion film, and AZ31B magnesium alloy is enabled to have the appearance and gloss of likeness in form copper, thus also
With great application value and commercial value.
It continues with and provides some specific embodiments to AZ31B surface treatment method of Mg alloy and its AZ31B magnesium alloy gold
Yellow conversion film treating agent is illustrated.
Embodiment 1
Using AZ31B magnesium alloy, specimen size is 48mm × 20mm × 2.3mm.
1, degreasing: degreasing agent includes: 10 grams per liter of sodium hydroxide, 20 grams per liter of sodium tripolyphosphate, 5 grams per liter of sodium metasilicate, Portugal
2 grams per liter of grape sodium saccharate, 1 grams per liter of 1.25 grams per liter of OP-10 emulsifier and K12 anion active agent.60 degrees Celsius of temperature, processing 6
Minute.It is put into following pickling solution and handles after washing.
2, pickling etches: etchant includes: 50 ml ls and 0.2 ml l of low foaming surfactant of nitric acid.Temperature is
Room temperature is handled 30~60 seconds.It is put into following table tune liquid and handles after washing；
3, table tune is bleached: table adjustment is the sodium hydroxide of 50~100 grams per liters, and temperature is 60 degrees Celsius, and the time is 5 minutes.
It is put into following conversion fluid and handles after washing；
4, it converts film process: above-mentioned processed AZ31B magnesium alloy workpiece is put into the AZ31B magnesium alloy of following each component
In golden yellow conversion film treating agent:
The sodium hydroxide solution of 0.1 mol/L is used to adjust pH value as 1.5；Temperature is room temperature, and the time is 25~35 seconds.
It is put into following confining liquid and handles after washing；
5, it closes: using 1~3 grams per liter of ammonium metavanadate, 1~3 grams per liter of sodium metavanadate, 1~3 grams per liter of ammonium metatungstate, temperature is normal
Temperature is handled 3~5 minutes.It is put into following baking oven and handles after washing；
6, it dries: being toasted being put into 135 ± 5 DEG C of baking oven after the good workpiece washing of conversion processing 10~25 minutes.
Embodiment 2
Unlike the first embodiment, AZ31B magnesium alloy golden yellow conversion film treating agent includes each group of following mass component
Point:
Embodiment 3
Unlike the first embodiment, AZ31B magnesium alloy golden yellow conversion film treating agent includes each group of following mass component
Point:
Embodiment 4
Unlike the first embodiment, AZ31B magnesium alloy golden yellow conversion film treating agent includes each group of following mass component
Point:
Embodiment 5
Unlike the first embodiment, AZ31B magnesium alloy golden yellow conversion film treating agent includes each group of following mass component
Point:
Embodiment 6
Unlike the first embodiment, AZ31B magnesium alloy golden yellow conversion film treating agent includes each group of following mass component
Point:
Embodiment 6
Unlike the first embodiment, AZ31B magnesium alloy golden yellow conversion film treating agent includes each group of following mass component
Point:
Comparative example 1
Unlike the first embodiment, AZ31B magnesium alloy golden yellow conversion film treating agent includes each group of following mass component
Point: 98% sulfuric acid, 4.5 grams per liter；50% manganese nitrate, 2.5 grams per liter；3 grams per liter of potassium permanganate；0.6 grams per liter of metavanadate；Dispersing agent
0.03 ml l；0.4 grams per liter of nano magnesia；Surplus is water.
Comparative example 2
Unlike the first embodiment, AZ31B magnesium alloy golden yellow conversion film treating agent includes each group of following mass component
Point: 98% sulfuric acid, 4.5 grams per liter；50% manganese nitrate, 2.5 grams per liter；3 grams per liter of potassium permanganate；0.6 grams per liter of metavanadate；Dispersing agent
0.03 ml l；1.3 grams per liter of nano magnesia；Surplus is water.
Comparative example 3
Unlike the first embodiment, the AZ31B magnesium alloy golden yellow conversion film treating agent of use is substituted for following treatment fluid
Processing: treatment fluid composition are as follows: 35g/L sodium dihydrogen phosphate, 35g/L manganese sulfate, 1.5g/L tetrasodium ethylenediamine tetraacetate and 3g/L nitre
Sour sodium.
Treated that golden yellow is presented in AZ31B magnesium alloy sample surfaces for each embodiment and each comparative example, and surface exists
AZ31B magnesium alloy sample surfaces form conversion film.By each embodiment and each comparative example treated AZ31B magnesium alloy sample,
After being placed at room temperature for 24 hours, salt mist experiment is carried out according to ASTMB-117.It carries out being observed after being continuously sprayed respectively.Experiment knot
Fruit is as follows:
The salt spray resistance experimental result of each embodiment of table 1 and each comparative example treated AZ31B magnesium alloy sample
It can be seen from Table 1 that treated that AZ31B magnesium alloy sample has for each embodiment and comparative example 1 and comparative example 2
There is preferable salt spray resistance ability, it can be salt spray resistance 30 hours or more.But treated the AZ31B magnesium alloy sample of comparative example 3 is not
Can salt spray resistance to 30 hours, show that each embodiment and comparative example 1 and comparative example 2, being capable of salt spray resistances 30 compared to comparative example 3
Hour or more.Show AZ31B magnesium alloy golden yellow conversion film treating agent provided by the invention, can be improved AZ31B magnesium alloy
Corrosion resistance.And the golden yellow conversion film formed has the advantages that adhesive force is good, salt fog performance is good and good at film uniformity.
In addition, treated that AZ31B magnesium alloy sample can be salt spray resistance 44 hours or more for embodiment 6, show that it, can for best composition
Significantly improve the salt spray resistance ability of AZ31B magnesium alloy sample.
Above-mentioned AZ31B magnesium alloy golden yellow conversion film treating agent, not phosphorous and chromium will not generate pollution to environment, thus
The feature of environmental protection is preferable.
Above-mentioned AZ31B magnesium alloy golden yellow conversion film treating agent, by using 98% sulfuric acid, 5 grams per liter~25 grams per liters；
50% manganese nitrate, 1 grams per liter~25 grams per liters；1 grams per liter of potassium permanganate~25 grams per liters；0.1 grams per liter of metavanadate~1 grams per liter；Point
0.01 ml l~0.05 ml l of powder；Surplus is water, can be in AZ31B after being applied to the processing of AZ31B Mg alloy surface
Mg alloy surface forms one layer of golden yellow conversion film, can be improved the corrosion resistance of AZ31B magnesium alloy.And the golden yellow formed
Conversion film has the advantages that adhesive force is good, salt fog performance is good and good at film uniformity.In addition, above-mentioned AZ31B magnesium alloy is golden yellow
Color conversion film treating agent, not phosphorous and chromium will not generate pollution to environment, thus the feature of environmental protection is preferable.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.It should be noted that " in an embodiment ", " example of the application
Such as ", " for another example ", it is intended to the application is illustrated, rather than for limiting the application.Embodiment described above only table
Several embodiments of the invention are reached, the description thereof is more specific and detailed, and but it cannot be understood as to patent of invention
The limitation of range.It should be pointed out that for those of ordinary skill in the art, in the premise for not departing from present inventive concept
Under, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.Therefore, the protection of the invention patent
Range should be determined by the appended claims.
Claims (10)
1. a kind of AZ31B magnesium alloy golden yellow conversion film treating agent, which is characterized in that each component including following concentration:
2. AZ31B magnesium alloy golden yellow conversion film treating agent according to claim 1, it is characterised in that including following concentration
Each component:
3. AZ31B magnesium alloy golden yellow conversion film treating agent according to claim 1, which is characterized in that including following dense
The each component of degree:
4. AZ31B magnesium alloy golden yellow conversion film treating agent according to claim 1, which is characterized in that the dispersing agent
For in neopelex, lauryl sodium sulfate, diethylhexyl sodium sulphate and sodium methylene bis-naphthalene sulfonate at least
It is a kind of.
5. AZ31B magnesium alloy golden yellow conversion film treating agent according to claim 1, which is characterized in that the metavanadic acid
Salt is at least one of sodium metavanadate, potassium metavanadate and ammonium metavanadate.
6. AZ31B magnesium alloy golden yellow conversion film treating agent according to claim 1, which is characterized in that the water is to go
Ionized water.
7. AZ31B magnesium alloy golden yellow conversion film treating agent according to claim 1, which is characterized in that the AZ31B magnesium
The pH of alloy golden yellow conversion film treating agent is adjusted to 1.5 using sodium hydroxide solution.
8. a kind of AZ31B surface treatment method of Mg alloy, which is characterized in that including using such as institute in any one of claim 1 to 7
The AZ31B magnesium alloy golden yellow conversion film treating agent stated carries out conversion film process.
9. AZ31B surface treatment method of Mg alloy according to claim 8, which comprises the steps of:
AZ31B magnesium alloy is subjected to degreasing degreasing processing；
It will treated that the AZ31B magnesium alloy carries out pickling etching process by the degreasing degreasing；
The AZ31B magnesium alloy after the pickling etching process is put into carry out table tune bleaching in table adjustment；
The AZ31B magnesium alloy after the table tune bleaching is put into AZ31B magnesium alloy golden yellow conversion film process
Chemical conversion film process is carried out in agent, wherein the AZ31B magnesium alloy golden yellow conversion film treating agent is such as claim 1 to 7
AZ31B magnesium alloy golden yellow conversion film treating agent described in any one；
Closing washing process will be carried out by the AZ31B magnesium alloy after the chemical conversion film process；
The AZ31B magnesium alloy after the closing washing process is subjected to drying and processing.
10. AZ31B surface treatment method of Mg alloy according to claim 9, which is characterized in that put AZ31B magnesium alloy
Enter progress degreasing degreasing processing in degreasing agent.
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