CN110093615A - A method of it takes off except magnesium alloy differential arc oxidation film layer - Google Patents
A method of it takes off except magnesium alloy differential arc oxidation film layer Download PDFInfo
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- CN110093615A CN110093615A CN201810098325.6A CN201810098325A CN110093615A CN 110093615 A CN110093615 A CN 110093615A CN 201810098325 A CN201810098325 A CN 201810098325A CN 110093615 A CN110093615 A CN 110093615A
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/12—Light metals
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Abstract
The present invention provides a kind of methods taken off except magnesium alloy differential arc oxidation film layer, including acid etching step, clear water rinsing step, neutralization reaction step and the ultrasonic wave water washing step successively carried out, wherein, settable multiple tracks clear water rinsing step, the present invention have the advantages that simple process, easy to operate, cost is relatively low between neutralization reaction step and ultrasonic wave water washing step and after ultrasonic wave water washing step.Acid etching step of the invention is using the environment-friendly type etching agent being formulated meticulously, including ingredients such as main acid, surfactant, wetting agent, complexing agent and magnesium alloy reduction agent A, while guaranteeing that differential arc oxidation film layer takes off film uniformity, the flatness and percent ripple for improving magnesium alloy work-piece surface after taking off film have the advantages that take off film effect ideal.By the present invention, treated that Mg alloy surface light is for example new, is able to carry out secondary differential arc oxidation processing and significantly reduces production cost while improving product yield.
Description
Technical field
The invention belongs to magnesium alloy manufacture processing technique field more particularly to a kind of take off except magnesium alloy differential arc oxidation film layer
Method utilizes convenient for that will be attached with the magnesium alloy workpiece defective product recycling of differential arc oxidation film layer.
Background technique
Magnesium alloy is a kind of metal that chemical property is active, and oxidation corrosion phenomenon easily occurs for surface.Differential arc oxidization technique
It is one of Mg alloy surface processing means commonly used in the trade at present, is also known as micro-plasma oxidation, passes through electrolyte and phase
The combination of powered-down parameter, by the instantaneous high-temperature condition of high voltage that arc discharge generates, so that metal surface growth in situ goes out one layer
Continuously, uniform ceramic film.Differential arc oxidation film layer has many advantages, such as that binding force is strong, hardness is high, corrosion resistance is strong, can be greatly
Promote the corrosion-resistant and antiwear characteristic of magnesium alloy.
Currently, a certain amount of defective products can be generated in magnesium alloy workpiece manufacture process, as surface is scratched scratch
Substandard products, oil removing it is unclean caused by flower material product and storage it is improper caused by mouldy product, in line with economizing on resources, repeat benefit
Principle needs to be returned these defective products furnace recycling, but these defective products have the differential arc oxidation of densification due to surface
Ceramic membrane, and take off except ceramic coating formed by micro-arc oxidation is cumbersome and complicated, and higher cost, and what is obtained takes off except effect very
It is undesirable.
Therefore, there is an urgent need to research and develop a kind of easy to operate, at low cost and take off the magnesium alloy differential arc oxidation film good except effect
Layer takes off except method, to achieve the purpose that save production capacity, promote resource circulation utilization.
Summary of the invention
The present invention in view of the deficiencies of the prior art, provides a kind of taking off except method for magnesium alloy differential arc oxidation film layer,
It has the advantages that environmentally friendly, simple to operate and takes off except effect is ideal.
The present invention is by the following technical programs to realize the purpose of the invention: one kind takes off except magnesium alloy differential arc oxidation film
The method of layer, specifically comprises the following steps:
S1, it will need to take off to impregnate except the magnesium alloy workpiece of differential arc oxidation layer is placed in etching agent, the constituent of the etching agent
It include: the main acid of 20 ~ 40g/L, the surfactant of 0.5 ~ 1.0g/L, the wetting agent of the complexing agent of 0.5 ~ 10g/L, 10 ~ 30g/L
And the magnesium alloy reduction agent A of 5 ~ 20g/L, the main acid is fluoric-containing acid or fluorine-containing hydrochlorate or sulfuric acid；
S2, etching agent is impregnated after magnesium alloy workpiece be placed in clear water and rinse；
S3, the magnesium alloy workpiece that will pass through step S2 washing, which will be placed in aqueous slkali, carries out neutralization reaction, and reaction temperature is 10~40
DEG C, so that magnesium alloy work-piece surface is in neutrality or alkalescence；
S4, the magnesium alloy workpiece for completing step S3 is carried out to ultrasonic wave water washing, washing temperature is 15~40 DEG C.
Further, the fluoric-containing acid in the step S1 is hydrofluoric acid, and fluorine-containing hydrochlorate is hydrogen fluoride amine.By the way that hydrogen is added
Fluoric acid or hydrogen fluoride amine, so that it reacts to form the magnesium fluoride for being insoluble in water with magnesium, magnesium fluoride is attached to magnesium alloy work-piece surface,
To reduce acid solution and be further corroded to magnesium alloy workpiece after taking off except differential arc oxidation film layer.
Further, complexing agent described in the step S1 is phosphoric acid, phosphate, citric acid, citrate, winestone
One of acid, tartrate and succinic acid or a variety of mixtures.Above-mentioned complexing agent is added, can reduce take off in membrane process by
The etch pit caused by excessive corrosion, so that the flatness and percent ripple of magnesium alloy after film are taken off in raising.
Further, the wetting agent is one of propylene glycol, glycerine and triethanolamine or a variety of mixtures.
Wetting agent, which is added, can be improved the degree of wetting of magnesium alloy work-piece surface, so that it is guaranteed that can equably take off except differential arc oxidation film layer.
Further, the magnesium alloy reduction agent A is one in sodium formaldehyde sulfoxylate, oxalic acid and potassium dihydrogen sulfate
Kind or a variety of mixtures.The effect of magnesium alloy reduction agent A is the brand-new degree for guaranteeing magnesium alloy.
Further, aqueous slkali is the mixed solution of EDTA and sodium hydroxide and/or sodium carbonate in the step S3, is convenient for
Subsequent wastewater treatment, so that waste liquid belongs to environmentally friendly treatment fluid.
Further, the ultrasonic wave water washing time is 2~5min, and supersonic generator power is 2~4KW, vibration
Wind frequency is 50~80KHz.
Further, increase clear water together between the step S3 and step S4 and rinse process, the clear water rinses
Process is the same as step S2.
Further, the clear water is industrial pure water, and washing time is 30~60s.
Further, magnesium alloy differential arc oxidation film layer of the invention takes off except method further includes drying steps, magnesium alloy workpiece
Drying steps are directly entered after completing step S4, or enter dry step after multiple tracks clear water rinses process again after completing step S4
Suddenly；The drying steps are the wind leaching purging process and baking process successively carried out.
Beneficial effects of the present invention:
1, the invention discloses a kind of methods taken off except magnesium alloy surface micro-arc oxidation film layer, including the acid etching step successively carried out
Suddenly, clear water rinsing step, neutralization reaction step and ultrasonic wave water washing step, neutralization reaction step and ultrasonic wave water washing step it
Between and ultrasonic wave water washing step after settable multiple tracks clear water rinsing step, originally take off except micro-arc oxidation films layer method have work
The advantages of skill is simple and convenient to operate, cost is relatively low, by the present invention, treated that Mg alloy surface metal base light is for example new,
And substrate loss amount is few, flatness is high, is able to carry out differential arc oxidation secondary operation；
2, the present invention takes off except the acid etching step in method uses the etching agent of distinct configuration, including main acid, surfactant, wetting
Agent, complexing agent and magnesium alloy reduction agent A improve magnesium after taking off film while guaranteeing that differential arc oxidation film layer takes off film uniformity
The flatness and percent ripple on alloy workpiece surface, and effectively reduce take off except after film layer magnesium alloy work-piece surface by acid solution into
Corrode to one step, has the advantages that take off film effect ideal；
3, the raw material that this differential arc oxidation film layer takes off film method use is easy to get and environmental protection, the waste liquid after taking off film pass through at simple neutralization
It can be discharged after reason, be effectively protected environment, realize sustainable development.
Detailed description of the invention
Fig. 1 is the magnesium alloy work-piece surface electron microscope after taking off in embodiment 5 except differential arc oxidation film layer.
Fig. 2 is the magnesium alloy work-piece surface electron microscope after taking off in embodiment 6 except differential arc oxidation film layer.
Specific embodiment
The invention will be further described with specific embodiment with reference to the accompanying drawing, but does not limit the scope of the invention.
Embodiment 1
Present embodiment discloses a kind of methods taken off except magnesium alloy differential arc oxidation film layer, including acid etching step, first wash to walk
Suddenly, neutralization reaction step, second wash step, ultrasonic wave water washing step and drying steps.Wherein, it in acid etching step, adopts
Etching agent includes following ingredient: the hydrofluoric acid of 25g/L, the sodium phosphate of 5g/L, dodecyl sodium sulfate, the 13g/ of 0.5g/L
The glycerine of L and the oxalic acid of 20g/L, acid based on hydrofluoric acid, sodium phosphate is complexing agent, and dodecyl sodium sulfate is surface-active
Agent, glycerine are wetting agent, and oxalic acid is magnesium alloy reduction agent A；In neutralization reaction step, neutralizer is the sodium hydroxide of 20g/L
With the EDTA mixture of 5g/L.Need to take off the magnesium alloy model AZ91D except differential arc oxidation film layer in the present embodiment, surface
Differential arc oxidation film layer is with a thickness of 10 μm.
The magnesium alloy differential arc oxidation film layer of the present embodiment takes off except method specifically includes following operating process:
S1, etching agent and neutralizer are configured according to the specific dosage of the present embodiment；
S2, under 20~30 DEG C of normal temperature condition, the magnesium alloy defective products Jing Guo micro-arc oxidation treatment is placed in etching agent and is soaked
Steep 2min, as acid etching step；
S3, under 20~30 DEG C of normal temperature condition, will be placed in industrial pure water by the magnesium alloy workpiece of step S1 acid etching
Wash 30s, as first wash step；
S4, the magnesium alloy workpiece Jing Guo first wash step is placed in neutralizer, under conditions of 20 DEG C, neutralization reaction
2min is in neutrality magnesium alloy work-piece surface or alkalescence；
S5, under 20~30 DEG C of normal temperature condition, the magnesium alloy workpiece for completing step S4 is placed in industrial pure water and cleans 30s,
As second wash step；
S6, the magnesium alloy workpiece Jing Guo second wash step is placed in ultrasonic unit and is cleaned, washing temperature is 20 DEG C, is surpassed
The pH value of sound wave water lotion is 7.8, scavenging period 2min；
S7, the magnesium alloy workpiece Jing Guo ultrasonic water washing lotion step is dried up with compressed air, is placed in drying room dry.
It should be noted that the magnesium alloy workpiece after ultrasonic water washing lotion step can be passed through in above-mentioned steps S7
After multiple tracks water-washing step, then dried up and dried surface moisture.
After the processing of the method disclosed in the present embodiment of magnesium alloy with differential arc oxidation film layer, Mg alloy surface film layer takes off
Except effect is general, and out-of-flatness is omited on surface, and there is black on surface and there are dusting phenomenon, and see Table 1 for details for concrete condition.
Embodiment 2
Present embodiment discloses a kind of methods taken off except magnesium alloy differential arc oxidation film layer, including acid etching step, first wash to walk
Suddenly, neutralization reaction step, second wash step, ultrasonic wave water washing step, third time water-washing step and drying steps.Its
In, in acid etching step, the etching agent of use includes following ingredient: the hydrogen fluoride amine of 35g/L, the sodium citrate of 1g/L, 0.8g/L
Dodecyl sodium sulfate, the propylene glycol of 20g/L and the sodium formaldehyde sulfoxylate of 10g/L, sour agent, lemon based on hydrogen fluoride amine
Sour sodium is complexing agent, and dodecyl sodium sulfate is surfactant, and propylene glycol is wetting agent, and sodium formaldehyde sulfoxylate is magnesium alloy
Reducing agent A；In neutralization reaction step, neutralizer is the sodium hydroxide of 20g/L and the EDTA mixture of 5g/L.It is needed in the present embodiment
The magnesium alloy model AZ91D except differential arc oxidation film layer is taken off, the differential arc oxidation film layer on surface is with a thickness of 10 μm.
The magnesium alloy differential arc oxidation film layer of the present embodiment takes off except method specifically includes following operating process:
S1, etching agent and neutralizer are configured according to the specific dosage of the present embodiment；
S2, under 20~30 DEG C of normal temperature condition, the magnesium alloy defective products Jing Guo micro-arc oxidation treatment is placed in etching agent and is soaked
Steep 2min, as acid etching step；
S3, under 20~30 DEG C of normal temperature condition, will be placed in industrial pure water by the magnesium alloy workpiece of step S1 acid etching
Wash 60s, as first wash step；
S4, the magnesium alloy workpiece Jing Guo first wash step is placed in neutralizer, under conditions of 20 DEG C, neutralization reaction
1min is in neutrality magnesium alloy work-piece surface or alkalescence；
S5, under 20~30 DEG C of normal temperature condition, the magnesium alloy workpiece for completing step S4 is placed in industrial pure water and cleans 60s,
As second wash step；
S6, the magnesium alloy workpiece Jing Guo second wash step is placed in ultrasonic unit and is cleaned, washing temperature is 40 DEG C, is surpassed
The pH value of sound wave water lotion is 7.8, scavenging period 3min；
S7, the magnesium alloy workpiece Jing Guo ultrasonic wave water washing step is placed in industrial pure water and cleans 60s, as third time washing step
Suddenly；
S8, the magnesium alloy workpiece Jing Guo third time water lotion step is dried up with compressed air, is placed in drying room dry.
After the processing of the method disclosed in the present embodiment of magnesium alloy with differential arc oxidation film layer, Mg alloy surface film layer takes off
Except effect is preferable, but there is black on surface and there are dusting phenomenon, and see Table 1 for details for concrete condition.
Embodiment 3
Present embodiment discloses a kind of methods taken off except magnesium alloy differential arc oxidation film layer, including acid etching step, first wash to walk
Suddenly, neutralization reaction step, second wash step, ultrasonic wave water washing step, third time water-washing step and drying steps, specifically
Operating process is the same as embodiment 2.Need to take off the magnesium alloy model AZ91D except differential arc oxidation film layer in the present embodiment, surface
Differential arc oxidation film layer is with a thickness of 10 μm.
It should be noted that the etching agent of use includes following ingredient: the sulfuric acid of 23g/L, 0.5g/L in acid etching step
Sodium citrate, the potassium dihydrogen sulfate of the dodecyl sodium sulfate of 1.0g/L, the glycerine of 25g/L and 10g/L, based on sulfuric acid
Sour agent, sodium citrate are complexing agent, and dodecyl sodium sulfate is surfactant, and glycerine is wetting agent, and potassium dihydrogen sulfate is
Magnesium alloy reduction agent A；In neutralization reaction step, neutralizer is the sodium hydroxide of 20g/L and the EDTA mixture of 5g/L.
After the processing of the method disclosed in the present embodiment of magnesium alloy with differential arc oxidation film layer, Mg alloy surface is in dark brown
Color and slightly sand sense, flatness are general, see Table 1 for details for concrete condition.
Embodiment 4
Present embodiment discloses a kind of methods taken off except magnesium alloy differential arc oxidation film layer, including acid etching step, first wash to walk
Suddenly, neutralization reaction step, second wash step, ultrasonic wave water washing step, third time water-washing step and drying steps, specifically
Operating process is the same as embodiment 2.Need to take off the magnesium alloy model AZ91D except differential arc oxidation film layer in the present embodiment, surface
Differential arc oxidation film layer is with a thickness of 10 μm.
It should be noted that the etching agent of use includes following ingredient: the sulfuric acid of 18g/L, 1.0g/L in acid etching step
Tartaric acid, the oxalic acid of the dodecyl sodium sulfate of 0.5g/L, the triethanolamine of 11.2g/L and 10g/L, acid based on sulfuric acid
Agent, tartaric acid are complexing agent, and dodecyl sodium sulfate is surfactant, and triethanolamine is wetting agent, oxalic acid be magnesium alloy also
Former agent A；In neutralization reaction step, neutralizer is the sodium hydroxide of 30g/L and the EDTA mixture of 5g/L.
After the processing of the method disclosed in the present embodiment of magnesium alloy with differential arc oxidation film layer, Mg alloy surface cleans light
Bright, flatness is preferable, and no dusting phenomenon, see Table 1 for details for concrete condition.
Embodiment 5
Present embodiment discloses a kind of methods taken off except magnesium alloy differential arc oxidation film layer, including acid etching step, first wash to walk
Suddenly, neutralization reaction step, second wash step, ultrasonic wave embathe step, wind leaching purge step and baking step, wherein
Ultrasonic wave embathes step, wind leaching purge step and baking step can complete in the same liquid gas cleaner, described
Liquid gas cleaner includes the sonication chamber set gradually, wind leaching purging room and drying room；Wind leaching purging room is equipped with air inlet
And air outlet, the external nitrogen storage facility of air inlet, the external extractor fan of air outlet open nitrogen storage facility and extractor fan
Afterwards, entire wind leaching purging room forms nitrogen wind, to achieve the purpose that dry up magnesium alloy work-piece surface moisture；The temperature of drying room
It is 80 DEG C, achievees the purpose that magnesium alloy work-piece surface dry cleansing.Need to take off the magnesium conjunction except differential arc oxidation film layer in the present embodiment
Golden model AZ91D, the differential arc oxidation film layer on surface is with a thickness of 10 μm.
It should be noted that the etching agent of use includes following ingredient in acid etching step: the hydrofluoric acid of 12g/L,
The citric acid of 1.0g/L, the oxalic acid of the dodecyl sodium sulfate of 0.5g/L, the triethanolamine of 11.2g/L and 10g/L, hydrofluoric acid
Based on sour agent, citric acid is complexing agent, and dodecyl sodium sulfate is surfactant, and triethanolamine is wetting agent, and oxalic acid is magnesium
Alloy reducing agent A；In neutralization reaction step, neutralizer is the sodium carbonate of 30g/L and the EDTA mixture of 5g/L.
The magnesium alloy differential arc oxidation film layer of the present embodiment takes off except method specifically includes following operating process:
S1, etching agent and neutralizer are configured according to the specific dosage of the present embodiment；
S2, under 20~30 DEG C of normal temperature condition, the magnesium alloy defective products Jing Guo micro-arc oxidation treatment is placed in etching agent and is soaked
Steep 2min, as acid etching step；
S3, under 20~30 DEG C of normal temperature condition, will be placed in industrial pure water by the magnesium alloy workpiece of step S1 acid etching
Wash 40s, as first wash step；
S4, the magnesium alloy workpiece Jing Guo first wash step is placed in neutralizer, under conditions of 20 DEG C, neutralization reaction
2min, taking off film rate is 0.2 μm/s, is in neutrality magnesium alloy work-piece surface or alkalescence；
S5, under 20~30 DEG C of normal temperature condition, the magnesium alloy workpiece for completing step S4 is placed in industrial pure water and cleans 40s,
As second wash step；
S6, it will be embathed in sonication chamber that the magnesium alloy workpiece Jing Guo second wash step is placed in liquid gas cleaner, water
Washing temperature is 20 DEG C, and the pH value of ultrasonic water washing lotion is 7.8, scavenging period 5min；
S7, after completing step S6, wind leaching of the magnesium alloy workpiece transposition in sonication chamber in liquid gas cleaner is purged into room
Wind leaching purging room carries out wind leaching purge step to remove the moisture of magnesium alloy work-piece surface；
S8, after completing step S7, wind leaching is purged into indoor magnesium alloy workpiece transposition in drying room, 80 DEG C of baking 20min, really
Protect magnesium alloy work-piece surface dry cleansing.
After the processing of the method disclosed in the present embodiment of magnesium alloy with differential arc oxidation film layer, Mg alloy surface cleans light
Bright such as new, flatness is good, and no dusting phenomenon, see Table 1 for details for concrete condition.Magnesium alloy work-piece surface electron microscope such as Fig. 1 after taking off film
It is shown.
Embodiment 6
Present embodiment discloses a kind of methods taken off except magnesium alloy differential arc oxidation film layer, including acid etching step, first wash to walk
Suddenly, neutralization reaction step, second wash step, ultrasonic wave embathe step, wind leaching purge step and baking step, specific to grasp
Make process with embodiment 5.Need to take off the magnesium alloy model AZ91D except differential arc oxidation film layer in the present embodiment, surface it is micro-
Arc oxidation film layer is with a thickness of 10 μm.
It should be noted that the etching agent of use includes following ingredient in acid etching step: the hydrofluoric acid of 14g/L,
The succinic acid of 1.0g/L, the oxalic acid of the dodecyl sodium sulfate of 0.5g/L, the triethanolamine of 11.2g/L and 10g/L, hydrofluoric acid
Based on sour agent, succinic acid is complexing agent, and dodecyl sodium sulfate is surfactant, and triethanolamine is wetting agent, and oxalic acid is magnesium
Alloy reducing agent A；In neutralization reaction step, neutralizer is the sodium carbonate of 30g/L and the EDTA mixture of 5g/L.
After the processing of the method disclosed in the present embodiment of magnesium alloy with differential arc oxidation film layer, Mg alloy surface cleans light
Bright such as new, flatness is good, and no dusting phenomenon, see Table 1 for details for concrete condition.Magnesium alloy work-piece surface electron microscope such as Fig. 2 after taking off film
It is shown.
Magnesium alloy work-piece surface differential arc oxidation film layer takes off except effect is as shown in table 1 below in six embodiments.
As seen from the above table, embodiment 5 and embodiment 6 take off that film effect is ideal, and the magnesium alloy workpiece after taking off except film layer into
After the secondary differential arc oxidation processing of row, the differential arc oxidation film layer adhered to thereon is uniformly fine and smooth.In addition, using organic acid as complexing
Agent takes off film excellent result in salt or inorganic acid, improves the flatness and percent ripple of magnesium alloy after taking off film；Made using hydrofluoric acid
Film excellent result is taken off in bisalt or sulfuric acid for the main acid of etching agent, and the magnesium fluoride of water is insoluble in by being formed, is reduced
It takes off and magnesium alloy workpiece is further corroded after removing film layer.
The above is only a preferred embodiment of the present invention, it is not intended to limit the present invention in any form.It should
It points out, for those skilled in the art, without departing from the principle of the present invention, if can also make
Dry improvements and modifications, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (10)
1. kind taking off the method except magnesium alloy differential arc oxidation film layer, which comprises the steps of:
S1, it will need to take off to impregnate except the magnesium alloy workpiece of differential arc oxidation layer is placed in etching agent, the constituent of the etching agent
It include: the main acid of 20 ~ 40g/L, the surfactant of 0.5 ~ 1.0g/L, the wetting agent of the complexing agent of 0.5 ~ 10g/L, 10 ~ 30g/L
And the magnesium alloy reduction agent A of 5 ~ 20g/L, the main acid is fluoric-containing acid or fluorine-containing hydrochlorate or sulfuric acid；
S2, etching agent is impregnated after magnesium alloy workpiece be placed in clear water and rinse；
S3, the magnesium alloy workpiece that will pass through step S2 washing, which will be placed in aqueous slkali, carries out neutralization reaction, and reaction temperature is 10~40
DEG C, so that magnesium alloy work-piece surface is in neutrality or alkalescence；
S4, the magnesium alloy workpiece for completing step S3 is carried out to ultrasonic wave water washing, washing temperature is 15~40 DEG C.
2. the method according to claim 1 taken off except magnesium alloy differential arc oxidation film layer, which is characterized in that in the step S1
Fluoric-containing acid be hydrofluoric acid, and fluorine-containing hydrochlorate be hydrogen fluoride amine.
3. the method according to claim 1 taken off except magnesium alloy differential arc oxidation film layer, which is characterized in that in the step S1
The complexing agent be one of phosphoric acid, phosphate, citric acid, citrate, tartaric acid, tartrate and succinic acid or
A variety of mixtures.
4. the method according to claim 1 taken off except magnesium alloy differential arc oxidation film layer, which is characterized in that the wetting agent
For one of propylene glycol, glycerine and triethanolamine or a variety of mixtures.
5. the method according to claim 1 taken off except magnesium alloy differential arc oxidation film layer, which is characterized in that the magnesium alloy
Reducing agent A is one of sodium formaldehyde sulfoxylate, oxalic acid and potassium dihydrogen sulfate or a variety of mixtures.
6. the method according to claim 1 taken off except magnesium alloy differential arc oxidation film layer, which is characterized in that in the step S3
Aqueous slkali is the mixed solution of EDTA and sodium hydroxide and/or sodium carbonate.
7. the method according to claim 1 taken off except magnesium alloy differential arc oxidation film layer, which is characterized in that the ultrasonic wave
Washing time is 2~5min, and supersonic generator power is 2~4KW, and vibration wind frequency is 50~80KHz.
8. the method according to claim 1-7 taken off except magnesium alloy differential arc oxidation film layer, which is characterized in that institute
Increase clear water together between the step S3 stated and step S4 and rinse process, the clear water rinses process with step S2.
9. the method according to claim 8 taken off except magnesium alloy differential arc oxidation film layer, which is characterized in that the clear water is
Industrial pure water, washing time are 30~60s.
10. the method taken off except magnesium alloy differential arc oxidation film layer according to claim 8 or claim 9, which is characterized in that further include doing
Dry step, magnesium alloy workpiece is directly entered drying steps after completing step S4, or rinses again through multiple tracks clear water after completing step S4
Enter drying steps after process；The drying steps are the wind leaching purging process and baking process successively carried out.
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| CN1475602A (en) * | 2002-08-16 | 2004-02-18 | 中国科学院金属研究所 | Preparation method of magnesium alloy chromeless chemical conversion film and its used film forming solution |
| CN1837407A (en) * | 2006-04-19 | 2006-09-27 | 东南大学 | Method for treating surface of magnesium or alloy thereof |
| CN101871101A (en) * | 2010-06-13 | 2010-10-27 | 东北大学 | Preparation method of magnesium alloy surface metal plating layer |
| JP2014084500A (en) * | 2012-10-24 | 2014-05-12 | Knowledge Management Technology Co Ltd | Method of treating surface of magnesium or magnesium alloy, acid cleaning agent, conversion treatment agent and conversion-treated structure of magnesium or magnesium alloy |
| CN107313057A (en) * | 2016-04-26 | 2017-11-03 | 昆山汉鼎精密金属有限公司 | Magnesium alloy work-piece surface color method and products thereof |
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2018
- 2018-01-31 CN CN201810098325.6A patent/CN110093615A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1475602A (en) * | 2002-08-16 | 2004-02-18 | 中国科学院金属研究所 | Preparation method of magnesium alloy chromeless chemical conversion film and its used film forming solution |
| CN1837407A (en) * | 2006-04-19 | 2006-09-27 | 东南大学 | Method for treating surface of magnesium or alloy thereof |
| CN101871101A (en) * | 2010-06-13 | 2010-10-27 | 东北大学 | Preparation method of magnesium alloy surface metal plating layer |
| JP2014084500A (en) * | 2012-10-24 | 2014-05-12 | Knowledge Management Technology Co Ltd | Method of treating surface of magnesium or magnesium alloy, acid cleaning agent, conversion treatment agent and conversion-treated structure of magnesium or magnesium alloy |
| CN107313057A (en) * | 2016-04-26 | 2017-11-03 | 昆山汉鼎精密金属有限公司 | Magnesium alloy work-piece surface color method and products thereof |
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