CN107130233A - ZK61M magnesium alloys conversion film treating agent and its conversion membrane processing method - Google Patents
ZK61M magnesium alloys conversion film treating agent and its conversion membrane processing method Download PDFInfo
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- CN107130233A CN107130233A CN201710466078.6A CN201710466078A CN107130233A CN 107130233 A CN107130233 A CN 107130233A CN 201710466078 A CN201710466078 A CN 201710466078A CN 107130233 A CN107130233 A CN 107130233A
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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
- C23C22/40—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 containing molybdates, tungstates or vanadates
- C23C22/42—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 containing molybdates, tungstates or vanadates containing also phosphates
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Abstract
The present invention relates to a kind of ZK61M magnesium alloys conversion film treating agent and ZK61M magnesium alloys conversion membrane processing method, ZK61M magnesium alloys conversion film treating agent includes each component of following concentration：5 g/l~25 g/l of phosphoric acid；1 g/l~25 g/l of phosphate dihydrogen manganese；1 g/l~25 g/l of manganese nitrate；1 g/l~25 g/l of calcium nitrate；1 g/l~25 g/l of strontium nitrate；1 g/l~25 g/l of magnesium nitrate；0.1 g/l~1 g/l of metavanadate；The ml l of the ml l of dispersant 0.01~0.05；Surplus is water.Above-mentioned ZK61M magnesium alloys conversion film treating agent is carried out after chemical conversion film process to ZK61M Mg alloy surfaces, can form that adhesive force is good, corrosion resistant degree of corrosion high, salt spray resistance and into the good conversion film of film uniformity.
Description
Technical field
The present invention relates to ZK61M magnesium alloy surface conversion coating processing technology fields, more particularly to a kind of ZK61M magnesium alloys
Conversion film treating agent and ZK61M magnesium alloys conversion membrane processing method.
Background technology
At present, ZK61M (MB15) magnesium alloys are as a kind of high-strength magnesium alloy, and its specific strength has exceeded the 7075 of high intensity
Aluminium alloy, as long as solving it deforms the key issues such as shaping, surface anticorrosive, it is most likely that substantial portion of Al-alloy products,
The revolution again after aluminium alloy can be brought for Material Field.But ZK61M (MB15) magnesium alloy corrosion resistance in atmosphere
It is excessively poor, limit its application.ZK61M (MB15) magnesium alloy chemical activity is high, it is untapped so far go out comparison it is corrosion-resistant
The good environmentally friendly conversion film treating agent of property.Also the basic environmental protection consulted less than ZK61M (MB15) magnesium alloy conversion film on selected works, patent
Processing method, therefore develop ZK61M (MB15) Mg alloy surface environment-friendly type conversion coating treating fluid and handling process and will turn into
The task of top priority of chemical conversion treatment and inexorable trend.
The content of the invention
Based on this, it is necessary to which providing a kind of conversion film for enabling to ZK61M Mg alloy surfaces to generate has corrosion resistance
Preferable ZK61M magnesium alloys conversion film treating agent and its conversion membrane processing method.
A kind of ZK61M magnesium alloys conversion film treating agent, includes each component of following concentration：
For example, a kind of ZK61M magnesium alloys conversion film treating agent, includes each component of following concentration：Phosphoric acid 5 g/l~25
G/l；1 g/l~25 g/l of phosphate dihydrogen manganese；1 g/l~25 g/l of manganese nitrate；1 g/l~25 g/l of calcium nitrate；
1 g/l~25 g/l of strontium nitrate；1 g/l~25 g/l of magnesium nitrate；0.1 g/l~1 g/l of metavanadate；And, point
The ml l of the ml l of powder 0.01~0.05.The surplus of In remaining embodiment is that the rest may be inferred for water.
In one of the embodiments, each component of following concentration is included：
In one of the embodiments, each component of following concentration is included：
In one of the embodiments, the dispersant includes lauryl sodium sulfate, diethylhexyl sodium sulphate and Asia
At least one of double sodium naphthalene sulfonates of methyl.
A kind of ZK61M magnesium alloys convert membrane processing method, comprise the following steps：
ZK61M magnesium alloys are put into progress degreasing degreasing processing in degreasing agent；
The ZK61M magnesium alloys after degreasing degreasing processing are put into etchant and carried out at pickling etching
Reason；
The ZK61M magnesium alloys after the pickling etching process are put into carry out table during table is adjusted to adjust at bleaching
Reason；
The ZK61M magnesium alloys after the table adjusts bleaching are put into ZK61M magnesium alloy conversion film treating agents
Middle progress chemical conversion film process, wherein, the ZK61M magnesium alloys conversion film treating agent includes each component of following concentration：Phosphorus
5 g/l~25 g/l of acid；1 g/l~25 g/l of phosphate dihydrogen manganese；1 g/l~25 g/l of manganese nitrate；1 gram of calcium nitrate/
Rise~25 g/l；1 g/l~25 g/l of strontium nitrate；1 g/l~25 g/l of magnesium nitrate；Metavanadate 0.1 g/l~1
G/l；The ml l of the ml l of dispersant 0.01~0.05；Surplus is water；
Closing washing process will be carried out after the chemical conversion film process by the ZK61M magnesium alloys；
The ZK61M magnesium alloys after the closing washing process are subjected to drying and processing.
For example, in a kind of ZK61M magnesium alloys conversion membrane processing method, the ZK61M magnesium alloys conversion film treating agent includes
The each component of following concentration：5 g/l~25 g/l of phosphoric acid；1 g/l~25 g/l of phosphate dihydrogen manganese；1 g/l of manganese nitrate~
25 g/l；1 g/l~25 g/l of calcium nitrate；1 g/l~25 g/l of strontium nitrate；1 g/l~25 g/l of magnesium nitrate；Partially
0.1 g/l~1 g/l of vanadate；And, the ml l of the ml l of dispersant 0.01~0.05.
In one of the embodiments, after degreasing degreasing processing, before the pickling etching process, pickling etching
After processing, the table is adjusted before bleaching, the table is adjusted after bleaching；The chemical composition coating before processing and describedization
Learn after conversion film process, before the drying, also comprise the following steps：Adverse current water washing operations are carried out to the ZK61M magnesium alloys.
In one of the embodiments, the drying and processing is carried out at a temperature of 135 DEG C~150 DEG C.
In one of the embodiments, the drying and processing continues 10 minutes~25 minutes.
In one of the embodiments, the closing washing process is carried out at a temperature of 50 DEG C~60 DEG C.
In one of the embodiments, the closing washing process continues 3 minutes~5 minutes.
Above-mentioned ZK61M magnesium alloys conversion film treating agent is carried out after chemical conversion film process to ZK61M Mg alloy surfaces, can
Form that adhesive force is good, corrosion resistant degree of corrosion high, salt spray resistance and into the good conversion film of film uniformity.
Brief description of the drawings
Fig. 1 converts the step flow chart of membrane processing method for the ZK61M magnesium alloys of an embodiment of the present invention.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail.Many details are elaborated in the following description to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case of running counter to intension of the present invention, therefore the present invention is not limited by following public specific embodiment.
The ZK61M magnesium alloy conversion film treating agents of one embodiment, include each component of following concentration：
It is appreciated that when the concentration of phosphoric acid and phosphate dihydrogen manganese is relatively low, ZK61M Mg alloy surfaces film forming speed is slow, turn
Change film densification is smooth, and salt fog resistance is good；When phosphoric acid and phosphate dihydrogen manganese concentration are high, ZK61M Mg alloy surface liberations of hydrogen speed is fast, into
Film is coarse loose porous, and salt spray resistance is poor.Especially when the concentration of sulfuric acid and nitric acid is respectively above-mentioned concentration, its film forming
Can be preferably.In the present embodiment and embodiments below, surplus is that water can be deleted using as other embodiment, that is, ZK61M
Solvent in magnesium alloy conversion film treating agent is water.
When manganese nitrate, calcium nitrate, strontium nitrate, magnesium nitrate and higher metavanadate concentration, corrosion resistance is good, i.e. potassium fluorozirconate
When concentration with sodium fluozirconate is respectively above-mentioned concentration, the decay resistance of conversion film is preferable；When manganese nitrate, calcium nitrate, nitric acid
Strontium, magnesium nitrate and metavanadate concentration are low, and film forming is uneven, and corrosion resistance is poor.
ZK61M magnesium alloys conversion film treating agent described in any of the above-described embodiment carries out chemistry to ZK61M Mg alloy surfaces
Convert after film process, can form that adhesive force is good, corrosion resistant degree of corrosion high, salt spray resistance and into the good conversion of film uniformity
Film.
The ZK61M magnesium alloy conversion film treating agents of another embodiment, include each component of following concentration：
The ZK61M magnesium alloy conversion film treating agents of another embodiment, include each component of following concentration：
In order to preferably play the chemical composition coating process performance of the ZK61M magnesium alloys conversion film treating agent, for example, institute
ZK61M magnesium alloys conversion film treating agent is stated to use under conditions of pH value is 1.2~1.6；And for example, the ZK61M magnesium alloys turn
Change film process agent to use at a temperature of 50 DEG C~65 DEG C, so, can preferably play at the ZK61M magnesium alloys conversion film
Manage the chemical composition coating process performance of agent.
In order to improve the attached of the conversion film obtained after the ZK61M magnesium alloys conversion film treating agent processing ZK61M magnesium alloys
Put forth effort, corrosion resistant degree of corrosion, salt spray resistance and into film uniformity, for example, the dispersant includes lauryl sodium sulfate, two
At least one of ethylhexyl sulfate and sodium methylene bis-naphthalene sulfonate (NNO diffusants)；And for example, the dispersant includes ten
Sodium dialkyl sulfate, diethylhexyl sodium sulphate and NNO diffusants；And for example, lauryl sodium sulfate, diethylhexyl sodium sulphate
Mass ratio with NNO diffusants is (1~1.5)：(1~1.7)：(2~3.5)；And for example, the dispersant also includes activating agent,
Such as, the activating agent is lauryl sodium sulfate, diethylhexyl sodium sulphate, and both quality are 1：1；So, it can improve
The adhesive force of the conversion film obtained after ZK61M magnesium alloys conversion film treating agent processing ZK61M magnesium alloys, corrosion resistant degree of corrosion,
Salt spray resistance and into film uniformity.
Above-mentioned ZK61M magnesium alloys conversion film treating agent can be surface-treated to ZK61M magnesium alloys, for forming conversion
Film, is mediated after the steps such as reason-conversion film process-drying and processing, shape for example, passing sequentially through ungrease treatment-pickling processes-table
Into conversion film can fully meet ZK61M magnesium-alloy materials in the industrial production, especially smart mobile phone shell and middle plate
Corrosion Protection and appearance requirement, and corrosion resistance performance is good and coating and matrix adhesive force it is good.
For example, referring to Fig. 1, in an embodiment ZK61M magnesium alloys convert membrane processing method, comprise the following steps：
S110：The ZK61M magnesium alloys are put into progress degreasing degreasing processing in degreasing agent.
It is appreciated that due to consideration that ZK61M magnesium alloys, for example, ZK61M magnesium alloy semi-finished product, such as ZK61M magnesium alloys work
Part is during die cast, in order that the ZK61M magnesium alloy workpieces after shaping are easily separated from mould, it is necessary to spray necessarily
Releasing agent, i.e. mould release, releasing agent are sticked on ZK61M magnesium alloy work-piece surfaces, and traditional degreasing agent is difficult to wash, and this is right
Follow-up etch effect influence is very big, and ZK61M magnesium alloy work-piece surface appearance colors can be made uneven, can also be made in subsequent handling
Passivating film color is also inconsistent, removes releasing agent accordingly, it would be desirable to be handled using degreasing degreasing.
In order to preferably remove the releasing agent of the grease on ZK61M magnesium alloys, especially ZK61M Mg alloy surfaces, for example,
The degreasing agent of one embodiment, includes each component of following concentration：10 g/l of sodium hydroxide, 20 g/l of tertiary sodium phosphate, grape
1.5 g/l of 2 g/l of sodium saccharate and OP-10 emulsifying agents.
In order to preferably carry out degreasing degreasing processing, for example, temperature strip of the degreasing degreasing processing at 55 DEG C~70 DEG C
Carried out under part；For example, the degreasing degreasing processing is carried out under 60 DEG C of temperature conditionss；And for example, the degreasing degreasing processing is held
It is continuous 3 minutes~8 minutes, for example, degreasing degreasing processing continues 4 minutes；For example, temperature of the degreasing degreasing processing at 60 DEG C
Carried out under the conditions of degree and continue 4 minutes；In this way, degreasing degreasing processing can be carried out preferably.
S120：The ZK61M magnesium alloys after degreasing degreasing processing are put into progress pickling erosion in etchant
Quarter is handled.
For example, the pickling etching of an embodiment, includes each component of following concentration：50 milliliters of nitric acid, 0 gram of phosphatase 11/
Rise, the ml l of low foaming surfactant 0.2.
In order to preferably carry out pickling etching process, for example, temperature strip of the pickling etching process at 55 DEG C~65 DEG C
Carried out under part；And for example, the pickling etching process continues 30 seconds~120 seconds, in this way, preferably can carry out at pickling etching
Reason.
S130：The ZK61M magnesium alloys after the pickling etching process are put into carry out table during table is adjusted and adjust drift
White processing.
Bleaching effect is adjusted in order to further improve table, for example, the table, which is adjusted, includes each component of following concentration：
5 parts~50 parts of sodium hydroxide；
5 parts~50 parts of oxidant；
5 parts~50 parts of complexing agent.
In this way, can further improve table adjusts bleaching effect.
Bleaching is adjusted in order to preferably carry out table, for example, the table adjusts temperature strip of the bleaching at 50 DEG C~80 DEG C
Carried out under part；And for example, the table adjusts bleaching to continue 5 minutes, in this way, can preferably carry out table adjusts bleaching.
S140：The ZK61M magnesium alloys after the table adjusts bleaching are put at ZK61M magnesium alloy conversion films
Manage and chemical conversion film process is carried out in agent, wherein, the ZK61M magnesium alloys conversion film treating agent includes each group of following concentration
Point：5 g/l~25 g/l of phosphoric acid；1 g/l~25 g/l of phosphate dihydrogen manganese；1 g/l~25 g/l of manganese nitrate；Calcium nitrate
1 g/l~25 g/l；1 g/l~25 g/l of strontium nitrate；1 g/l~25 g/l of magnesium nitrate；0.1 g/l of metavanadate
~1 g/l；The ml l of the ml l of dispersant 0.01~0.05；Surplus is water.
In order to preferably carry out chemical conversion film process, for example, temperature of the chemical conversion film process at 50 DEG C~65 DEG C
Carried out under the conditions of degree；And for example, the chemical conversion film process continues 3 minutes~5 minutes, in this way, chemistry can be carried out preferably
Convert film process.
S150：Closing washing process will be carried out after the chemical conversion film process by the ZK61M magnesium alloys.
Using 1~3 g/l of ammonium metavanadate, 1~3 g/l of composition of 1~3 g/l of sodium metavanadate and ammonium metatungstate it is mixed
Close liquid and carry out " locked in " operation, 50~65 degree of temperature is handled 3~5 minutes.It is put into following baking oven and handles after washing.
S160：The ZK61M magnesium alloys after the chemical conversion film process are subjected to drying and processing.
In order to preferably carry out drying and processing, for example, the drying and processing enters under 135 DEG C~150 DEG C of temperature conditionss
OK；And for example, the chemical conversion film process continues 10 minutes~25 minutes, in this way, drying and processing can be carried out preferably.
In order to reduce the influence that each operation in ZK61M magnesium alloys conversion membrane treatment process is mutually produced, so as to improve whole
The pre-treatment effect of body, for example, after degreasing degreasing processing, before the etching process, after the etching process, the table is adjusted
Before bleaching, after table tune bleaching；After the chemical composition coating before processing and the chemical conversion film process,
Before the drying, also comprise the following steps：Adverse current water washing operations are carried out to the ZK61M magnesium alloys；And for example, the counter-flow water
Operation is washed to carry out using air stirring；And for example, at normal temperatures, carry out 3 times~5 times adverse currents to wash, so, it is possible to reduce ZK61M
The influence that each operation in magnesium alloy conversion membrane treatment process is mutually produced, so as to improve overall pre-treatment effect.
In one embodiment, a kind of ZK61M (MB15) magnesium alloy conversion film treating agents and processing method, the ZK61M
(MB15) magnesium alloy conversion film treating agent includes following component content：5~25 g/l of phosphoric acid；1~25 g/l of phosphate dihydrogen manganese；
1~25 g/l of manganese nitrate；1~25 g/l of calcium nitrate；1~25 g/l of strontium nitrate；1~25 g/l of magnesium nitrate；Metavanadate
0.1~1 g/l and the ml l of dispersant 0.01~0.05, surplus is water；And for example, conversion treating solution, it is characterized in that component contains
Measure and be：8~15 g/l of phosphoric acid；1~5 g/l of phosphate dihydrogen manganese；10~15 g/l of manganese nitrate；1~2 g/l of calcium nitrate；Nitre
Sour 1~2 g/l of strontium；1~2 g/l of magnesium nitrate；0.1~0.5 g/l of metavanadate and the ml l of dispersant 0.01~0.02,
Surplus is water；And for example, conversion treating solution, it is characterized in that component content is：5 g/l of phosphatase 11；5 g/l of phosphate dihydrogen manganese；Nitric acid
10 g/l of manganese；0.5 g/l of calcium nitrate；0.5 g/l of strontium nitrate；10 g/l of magnesium nitrate；0.3 g/l of metavanadate and scattered
The ml l of agent 0.01~0.02, surplus is water；And for example, the surface treatment method of Mg alloy of described conversion treating solution, including such as
Lower step：1st, degreasing：With 10 g/l of sodium hydroxide, 20 g/l of tertiary sodium phosphate, 2 g/l of sodium gluconate, OP-10 emulsifying agents
1.5 g/l, 60 degree of temperature is handled 6 minutes.It is put into following pickle and handles after washing；2nd, pickling：With 50 milliliters of nitric acid, phosphorus
10 g/l of acid, the ml l of low foaming surfactant 0.2,60 degree of temperature is handled 30~60 seconds.Following table is put into after washing and adjusts liquid
Middle processing；3rd, table is adjusted：With 50~100 g/l of sodium hydroxide, 60 degree of temperature, ash disposal is handled 5 minutes.It is put into and turns below after washing
Change in liquid and handle；4th, convert：Above-mentioned treated ZK61M (MB15) magnesium alloy workpiece is put into：5~25 g/l of phosphoric acid；Phosphoric acid
1~25 g/l of dihydro manganese；1~25 g/l of manganese nitrate；1~25 g/l of calcium nitrate；1~25 g/l of strontium nitrate；Magnesium nitrate 1~
25 g/l；0.1~1 g/l of metavanadate and the ml l of dispersant 0.01~0.05, surplus is water.PH value 1.5, temperature 50
Handled 3~5 minutes in~65 degree of conversion coating treating fluid.It is put into following confining liquid and handles after washing；5th, close：Use metavanadic acid
1~3 g/l of ammonium, 1~3 g/l of sodium metavanadate, 1~3 g/l of ammonium metatungstate, 50~65 degree of temperature is handled 3~5 minutes.Water
It is put into following baking oven and handles after washing；6th, dry：Dried being put into after the good workpiece washing of conversion processing in 135 ± 5 DEG C of baking oven
Roasting 10~25 minutes, so, ZK61M (MB15) the magnesium alloys conversion film treating agent includes following component content：Phosphoric acid 5~25
G/l；1~25 g/l of phosphate dihydrogen manganese；1~25 g/l of manganese nitrate；1~25 g/l of calcium nitrate；1~25 gram of strontium nitrate/
Rise；1~25 g/l of magnesium nitrate；0.1~1 g/l of metavanadate and the ml l of dispersant 0.01~0.05, surplus is water.
ZK61M (MB15) surface treatment method of Mg alloy is：Degreasing → washing → pickling → washing → table tune → washing → conversion film →
Washing → closing → washing → drying.Above-mentioned magnesium alloy conversion film treating agent can be formed in ZK61M (MB15) Mg alloy surface
Chromium-free fluorine-free conversion film, film layer salt spray resistance is good and advantage into film uniformity, is conducive to environmental protection, security compared with
Good, conversion film is good to paint adhesion.The conversion film treating agent can both be exclusively used for ZK61M (MB15) Mg alloy surface and form excellent
Benign transformation of energy film, can also be used in the conversion film of AZ91D and AZ31B Mg alloy surfaces formation premium properties.It can answer extensively
Surface anticorrosive for magnesium alloy workpiece product is pre-processed.
Specific embodiment is as follows：
Embodiment 1
1st, degreasing：With 10 g/l of sodium hydroxide, 20 g/l of tertiary sodium phosphate, 2 g/l of sodium gluconate, OP-10 emulsifying agents
1.5 g/l, 60 degree of temperature is handled 6 minutes.It is put into following pickle and handles after washing；
2nd, pickling：With 50 milliliters of nitric acid, 0 g/l of phosphatase 11, the ml l of low foaming surfactant 0.2,60 degree of temperature, place
Reason 30~60 seconds.Following table is put into after washing and adjusts processing in liquid；
3rd, table is adjusted：With 50~100 g/l of sodium hydroxide, 60 degree of temperature, ash disposal is handled 5 minutes.It is put into and turns below after washing
Change in liquid and handle；
4th, convert：Above-mentioned treated ZK61M (MB15) magnesium alloy workpiece is put into：
PH value=1.5.
Handled 3~5 minutes in the conversion coating treating fluid that 50~65 degree of temperature；
It is put into following confining liquid and handles after washing.
5th, close：With 1~3 g/l of ammonium metavanadate, 1~3 g/l of sodium metavanadate, 1~3 g/l of ammonium metatungstate, temperature 50
~65 degree, handle 3~5 minutes.It is put into following baking oven and handles after washing；
6th, dry：Toasted being put into after the good workpiece washing of conversion processing in 135 ± 5 DEG C of baking oven 10~25 minutes.
Embodiment 2
1st, degreasing：With 10 g/l of sodium hydroxide, 20 g/l of tertiary sodium phosphate, 2 g/l of sodium gluconate, OP-10 emulsifying agents
1.5 g/l, 60 degree of temperature is handled 6 minutes.It is put into following pickle and handles after washing；
2nd, pickling：With 50 milliliters of nitric acid, 0 g/l of phosphatase 11, the ml l of low foaming surfactant 0.2,60 degree of temperature, place
Reason 30~60 seconds.Following table is put into after washing and adjusts processing in liquid；
3rd, table is adjusted：With 50~100 g/l of sodium hydroxide, 60 degree of temperature, ash disposal is handled 5 minutes.It is put into and turns below after washing
Change in liquid and handle；
4th, convert：Above-mentioned treated ZK61M (MB15) magnesium alloy workpiece is put into：
PH value=1.5.
Handled 3~5 minutes in the conversion coating treating fluid that 50~65 degree of temperature；
It is put into following confining liquid and handles after washing.
5th, close：With 1~3 g/l of ammonium metavanadate, 1~3 g/l of sodium metavanadate, 1~3 g/l of ammonium metatungstate, temperature 50
~65 degree, handle 3~5 minutes.It is put into following baking oven and handles after washing；
6th, dry：Toasted being put into after the good workpiece washing of conversion processing in 135 ± 5 DEG C of baking oven 10~25 minutes.
Embodiment 3
1st, degreasing：With 10 g/l of sodium hydroxide, 20 g/l of tertiary sodium phosphate, 2 g/l of sodium gluconate, OP-10 emulsifying agents
1.5 g/l, 60 degree of temperature is handled 6 minutes.It is put into following pickle and handles after washing；
2nd, pickling：With 50 milliliters of nitric acid, 0 g/l of phosphatase 11, the ml l of low foaming surfactant 0.2,60 degree of temperature, place
Reason 30~60 seconds.Following table is put into after washing and adjusts processing in liquid；
3rd, table is adjusted：With 50~100 g/l of sodium hydroxide, 60 degree of temperature, ash disposal is handled 5 minutes.It is put into and turns below after washing
Change in liquid and handle；
4th, convert：Above-mentioned treated ZK61M (MB15) magnesium alloy workpiece is put into：
PH value=1.5,
Handled 3~5 minutes in the conversion coating treating fluid that 50~65 degree of temperature；
It is put into following confining liquid and handles after washing；
5th, close：With 1~3 g/l of ammonium metavanadate, 1~3 g/l of sodium metavanadate, 1~3 g/l of ammonium metatungstate, temperature 50
~65 degree, handle 3~5 minutes.It is put into following baking oven and handles after washing；
6th, dry：Toasted being put into after the good workpiece washing of conversion processing in 135 ± 5 DEG C of baking oven 10~25 minutes.
ZK61M (MB15) magnesium alloy workpiece is obtained after embodiment 1- embodiments 3 are handled to carry out after acidic fog resistance test, can
Acidic fog resistance requirement is met, corrosion resistant degree of corrosion is high.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each piece of technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for the ordinary skill people of this area
For member, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the present invention's
Protection domain.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of ZK61M magnesium alloys conversion film treating agent, it is characterised in that include each component of following concentration：
2. ZK61M magnesium alloys conversion film treating agent according to claim 1, it is characterised in that including each of following concentration
Component：
3. ZK61M magnesium alloys conversion film treating agent according to claim 2, it is characterised in that including each of following concentration
Component：
4. ZK61M magnesium alloys conversion film treating agent according to claim 1, it is characterised in that the dispersant includes ten
At least one of sodium dialkyl sulfate, diethylhexyl sodium sulphate and sodium methylene bis-naphthalene sulfonate.
5. a kind of ZK61M magnesium alloys convert membrane processing method, it is characterised in that comprise the following steps：
ZK61M magnesium alloys are put into progress degreasing degreasing processing in degreasing agent；
The ZK61M magnesium alloys after degreasing degreasing processing are put into progress pickling etching process in etchant；
The ZK61M magnesium alloys after the pickling etching process are put into carry out table during table is adjusted and adjust bleaching；
The ZK61M magnesium alloys after the table adjusts bleaching are put into ZK61M magnesium alloy conversion film treating agents
Row chemical conversion film process, wherein, the ZK61M magnesium alloys conversion film treating agent includes each component of following concentration：Phosphoric acid 5
G/l~25 g/l；1 g/l~25 g/l of phosphate dihydrogen manganese；1 g/l~25 g/l of manganese nitrate；1 g/l of calcium nitrate~
25 g/l；1 g/l~25 g/l of strontium nitrate；1 g/l~25 g/l of magnesium nitrate；0.1 g/l~1 g/l of metavanadate；
The ml l of the ml l of dispersant 0.01~0.05；Surplus is water；
Closing washing process will be carried out after the chemical conversion film process by the ZK61M magnesium alloys；
The ZK61M magnesium alloys after the closing washing process are subjected to drying and processing.
6. ZK61M magnesium alloys according to claim 5 convert membrane processing method, it is characterised in that at the degreasing degreasing
After reason, before the pickling etching process, after the pickling etching process, the table is adjusted before bleaching, the table is adjusted at bleaching
After reason；After the chemical composition coating before processing and the chemical conversion film process, before the drying, also include following step
Suddenly：Adverse current water washing operations are carried out to the ZK61M magnesium alloys.
7. ZK61M magnesium alloys according to claim 5 convert membrane processing method, it is characterised in that the drying and processing exists
Carried out at a temperature of 135 DEG C~150 DEG C.
8. ZK61M magnesium alloys according to claim 7 convert membrane processing method, it is characterised in that the drying and processing is held
It is continuous 10 minutes~25 minutes.
9. ZK61M magnesium alloys according to claim 5 convert membrane processing method, it is characterised in that at the closing washing
Reason is carried out at a temperature of 50 DEG C~60 DEG C.
10. ZK61M magnesium alloys according to claim 9 convert membrane processing method, it is characterised in that at the closing washing
Reason continues 3 minutes~5 minutes.
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| CN108018544A (en) * | 2017-12-01 | 2018-05-11 | 博罗县东明化工有限公司 | Magnesium alloy rare-earth conversion coatings inorganic agent and its processing method |
| CN108560007A (en) * | 2018-04-20 | 2018-09-21 | 深圳市恒享表面处理技术有限公司 | A kind of Mg alloy surface bleaching agent and preparation method thereof |
| CN109023333A (en) * | 2018-08-22 | 2018-12-18 | 东北大学 | Magnesium alloy moisture-proof thermal conducting-anti-corrosion chemical composition coating preparation process |
| CN110408918A (en) * | 2019-07-16 | 2019-11-05 | 北京科技大学 | A kind of film forming conversion fluid and film build method preparing Mg alloy surface anti-corrosion conductive film |
| CN110684970A (en) * | 2019-09-26 | 2020-01-14 | 博罗县东明化工有限公司 | Treatment method of magnesium alloy conversion film and conversion agent |
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| CN111893469A (en) * | 2020-08-26 | 2020-11-06 | 博罗县东明化工有限公司 | Conversion agent and treatment method for AZ91D die-cast magnesium alloy black conversion film |
| CN112725773A (en) * | 2020-12-21 | 2021-04-30 | 中国航天科工集团八五一一研究所 | Direct chemical nickel plating method universally used for AZ91D and ZK61M magnesium alloys |
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