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WO2000050666A1 - Procede de traitement d'article metallique a base de magnesium et solution de traitement associee - Google Patents

Procede de traitement d'article metallique a base de magnesium et solution de traitement associee Download PDF

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Publication number
WO2000050666A1
WO2000050666A1 PCT/JP2000/000920 JP0000920W WO0050666A1 WO 2000050666 A1 WO2000050666 A1 WO 2000050666A1 JP 0000920 W JP0000920 W JP 0000920W WO 0050666 A1 WO0050666 A1 WO 0050666A1
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WO
WIPO (PCT)
Prior art keywords
sodium
treatment
magnesium
based metal
molded body
Prior art date
Application number
PCT/JP2000/000920
Other languages
English (en)
Japanese (ja)
Inventor
Akira Hosaka
Kazuhide Takahashi
Original Assignee
Hosaka Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hosaka Inc. filed Critical Hosaka Inc.
Priority to AU25736/00A priority Critical patent/AU2573600A/en
Publication of WO2000050666A1 publication Critical patent/WO2000050666A1/fr

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Classifications

    • 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
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/22—Light metals
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • C23F1/32—Alkaline compositions
    • C23F1/40—Alkaline compositions for etching other metallic material

Definitions

  • the present invention relates to an improvement in a surface treatment method for a magnesium-based metal compact and a surface treatment liquid.
  • the magnesium-based metal used as the material of the molded body refers to a magnesium metal or an alloy of magnesium.
  • the magnesium alloy include Mg-A1, Mg-Zn, Mg-Mn, Mg-Ag, Mg-Li, and Mg-rare earth elements. Alloys containing magnesium. More specifically, the present invention relates to a surface treatment method for a magnesium-based metal molded body capable of imparting good corrosion resistance, corrosion resistance, and coating film adhesion to the surface of the magnesium-based metal molded body.
  • the present invention relates to a surface treatment method for a magnesium-based metal molded body that generates less harmful mist during treatment than the conventional method, has extremely low pollution of wastewater, and is advantageous in terms of environmental pollution.
  • Magnesium base metals made of magnesium and its alloys are used for various applications. In particular, market demands in the electric, automotive and other industries include thinner and lighter. Recently, as a means of realizing both of these demands, a case made of magnesium metal or magnesium alloy, which is a lightweight and highly rigid material, is used. In other words, magnesium metal and magnesium alloys have a density of about two-thirds that of aluminum alloys, are the lightest among practical metal materials, have good machinability, and have a high strength / density ratio.
  • magnesium metal or magnesium alloy It is used as a material for automobiles or electrical products.
  • the problem is the surface coating.
  • products made of synthetic resin have been widely used, but the method of applying synthetic resin has already been established.
  • magnesium coating has many newly developed elements.
  • this magnesium-based metal compact is immediately oxidized in the air after production or cutting and covered with a thin oxide film.
  • the adhesion of the coating film is significantly deteriorated.
  • Magnesium-based metal compacts that do not adhere to the coating film and are simply covered with a thin oxide film have disadvantages such as being easily soluble in acids such as hydrochloric acid, sulfuric acid, and nitric acid.
  • the method using a strongly acidic aqueous solution containing a hexavalent chromate as a main component has a disadvantage that a strongly acidic solution that is difficult to handle must be used.
  • wastewater containing hexavalent chromium causes environmental pollution. From the viewpoint of safety and environmental considerations during chemical treatment, it is desirable not to use chromium compounds as much as possible.
  • Japanese Patent Application Laid-Open No. Hei 8-35073 discloses that a magnesium base metal compact is prepared by adding at least one of permanganic acid or a water-soluble salt of manganese acid to 0.5 to 200 g. For 20 seconds to 30 minutes in an aqueous solution containing There has been proposed a method for modifying the surface of a magnesium-based metal molded body characterized by the above.
  • the proposed method requires that the emission standard for hexavalent chromium is 0.5 mg / liter, whereas manganese has an emission standard of 1 O mg / liter (same as the iron emission standard), which means that it is less toxic.
  • a magnesium base was prepared by using an aqueous solution containing a permanganate-based realm at a predetermined ratio and, optionally, a reforming accelerator at a predetermined ratio. By treating the surface of a metal molded body, it is intended to impart excellent corrosion resistance, corrosion resistance and coating film adhesion to the surface.
  • manganese-based processing solutions do not have the etching properties of chromic acid.
  • the present invention overcomes the drawbacks of the conventional method for treating a surface of a magnesium-based metal molded body and provides a treatment method capable of simultaneously performing cleaning and surface treatment (etching). Yes, by degreasing and cleaning the magnesium base metal molded body, and by cleaning and surface pre-treatment (etching), the adhesion of the coating film can be enhanced, and the coating film can improve corrosion resistance and corrosion resistance, and is harmful during processing. It is an object of the present invention to provide a method capable of simultaneously performing cleaning and surface treatment of a base without generating any unnecessary product.
  • the treatment method of the present invention is based on inorganic base chemicals as the main chemicals, without using harmful chemicals, pretreatment before painting (etching as a base treatment), degreasing, degreasing. Surface roughness to remove mold agent and improve coating adhesion Control is performed.
  • Another object of the present invention is to provide a treatment liquid used for treating such a magnesium-based metal compact.
  • Another object of the present invention is to provide a method for improving the coating film adhesion performance on the surface of a magnesium-based metal molded body.
  • the present invention is characterized in that a magnesium-based metal molded body is immersed in a treatment solution containing sodium mesosilicate, sodium carbonate, sodium phosphate and caustic soda as main components to perform cleaning and undercoating.
  • a treatment solution containing sodium mesosilicate, sodium carbonate, sodium phosphate and caustic soda as main components to perform cleaning and undercoating.
  • a method for treating a magnesium metal compact is provided.
  • the present invention also provides a method for improving the adhesion property of a coating film on the surface of a magnesium-based metal molded body, characterized by performing an acid activation treatment after the above treatment.
  • the present invention also provides an aqueous treatment liquid for cleaning and priming of a magnesium-based metal molded body containing the above components as a main component.
  • FIG. 1 is a flow chart of a surface etching and degreasing cleaning system for a magnesium-based metal molded body according to the present invention.
  • Figure 2 shows a flow sheet for the treatment liquid (drainage) treatment.
  • FIG. 3 shows a flowchart of the rinsing liquid treatment.
  • FIG. 4 is an example of a spectrum obtained by XPS wide scan of the sump ⁇ / surface, (a) shows the cleaning solution before cleaning, and (b) shows the cleaning solution.
  • FIG. 5 shows the ratio of C to the Mg of the background before and after the process, and (b) shows the ratio of Si to the Mg of the background before and after the process.
  • the present invention relates to a method for dispersing sodium mesosilicate in a stock solution in a mass percentage.
  • a stock solution containing 1 to 11%, 1 to 7% of sodium carbonate, 1 to 6% of sodium phosphate and 0.5 to 15% of caustic soda is diluted into a treatment solution, and a magnesium-based molded body is included in the treatment solution. For 30 seconds to 25 minutes (preferably, 1 to 25 minutes) for washing and underground treatment.
  • the present invention relates to a method for preparing sodium mesosilicate in a stock solution by mass percentage.
  • 1-11%, 2-6% of sodium carbonate, 1-4% of sodium phosphate and 3-15% of caustic soda are diluted to obtain a treatment liquid, and a magnesium base molded body is contained in the treatment liquid.
  • a magnesium base molded body is contained in the treatment liquid.
  • 30 seconds to 25 minutes (preferably, 1 to 25 minutes) for washing and undercoating for 30 seconds to 25 minutes (preferably, 1 to 25 minutes) for washing and undercoating.
  • the above-mentioned undiluted solution containing sodium mesosilicate, sodium carbonate, sodium phosphate and caustic soda was newly added as a washing solution based on inorganic base chemicals (silicate sodium metasilicate). It has been developed and will be released from Diatech Co., Ltd. as “M—N500”, so this should be used.
  • the present invention relates to an aqueous solution of a stock solution containing 5 to 6% of sodium silicate, 3 to 4% of sodium carbonate, 2 to 3% of sodium phosphate, and Diluting the stock solution containing 2 to 3% of the base material into a treatment solution, and immersing the magnesium-based molded body in the treatment solution for 30 seconds to 25 minutes (preferably 1 to 25 minutes) to perform washing and substrate treatment. Good to do.
  • sodium phosphate a mixture of sodium monophosphate and sodium pyrophosphate is preferable, and sodium monophosphate and sodium pyrophosphate are mixed in a weight ratio of 7/3 to 3/7. Preferably, it is 4 / 6-6 / 4, most preferably about 5/5.
  • the magnesium-based metal compact to be treated in the present invention includes: Alloy of magnesium metal and magnesium, for example, Mg-A1, Mg-Zn, Mg-Mn, Mg-Ag, Mg-Li, Mg-rare earth element And molded articles of alloys containing magnesium.
  • the shape and thickness of the molded body are arbitrary. According to the treatment method of the present invention, degreasing and surface preparation of a magnesium-based metal molded body can be performed simultaneously without polluting the environment like organic chemical substances.
  • the above-mentioned washing solution “M-N500” diluted with a stock solution and water at a ratio of 1: 8 is preferably based on an inorganic base-based chemical (silicate-based sodium metasilicate).
  • a newly developed cleaning solution has been developed and will be released from Diatech Co., Ltd. under the code number “M-N500A” in one of the “M-N Cleaner” series. I just need.
  • the code No. "M-N500A" of this 1 "M-N cleaner” is a state in which about 0.7% to 0.8% caustic soda is contained in the aqueous solution, and has low pollution. It is a water-soluble aqueous solution and is suitable as the cleaning base treatment liquid of the present invention.
  • the magnesium-based metal body is placed in a plurality of processing liquid tanks, and the magnesium-based metal body is sequentially processed in the plurality of processing liquid tanks and repeatedly processed with a new processing liquid.
  • the treatment can be performed more favorably by the cavitation by the ultrasonic wave.
  • the temperature of the processing liquid is in the range of 10 to 70 ° C (more preferably, 4 to 65 ° C)
  • the processing efficiency is improved.
  • the steps of (cleaning, priming) ⁇ (cleaning, priming) ⁇ (rinsing) (rinsing) ⁇ (drying) are preferably performed using a cleaning system using ultrasonic waves.
  • the cleaning and ground treatment of the magnesium metal compact are performed.
  • the present invention further provides a method for improving the adhesion property of a coating film on the surface of a magnesium-based metal molded body subjected to a surface treatment by the above method.
  • Rinsing cleaning and etching treatments
  • Rinsing (preferably 2 times or more, more preferably 2 times)
  • Acid activation treatment Neutralization ⁇ Smut removal treatment
  • Rinse " ⁇ Drying method
  • the acid activation treatment refers to, for example, preparing a dilute solution of industrial pure water lOOOOcc using an inorganic acid such as nitric acid, sulfuric acid, hydrochloric acid, hydrofluoric acid, or sulfurous acid, or an organic acid such as acetic acid.
  • the surface can be activated by immersing a case made of a magnesium-based metal molded body in a liquid for 30 seconds to 5 minutes. It is preferable from the viewpoint of safety that the dilution ratio of each acid is in the range of at least 0.5% to at most 10%.
  • the thickness of the surface oxide film by the acid activation treatment is 0; It is better to keep the thickness within 5 m. If a thicker surface oxide film is formed, remove the so-called smut, which is formed by the method (2), and control the thickness. Is good. Since this smut is an oxidized layer formed by acid, its adhesion to the powder is reduced in a powdered product, and it is removed again using a cleaning solution and ultrasonic waves to reduce the oxide film thickness to 5 m. It is preferable to keep the ratio below, since the surface volume fraction for improving the coating film adhesion performance can be maintained at 1 or less.
  • the surface volume fraction is 0.81 only in the pretreatment step (surface treatment step) of the present invention, and is 1.6 or more when a new acid activity is applied. Therefore, the one-part type epoxy-based primer and the powder simple substance are used.
  • the endurance time of the endurance test on the membrane can be improved by approximately 200%. You can also judge.
  • the acid activation treatment is preferably performed by immersing the magnesium base metal molded body in the above-mentioned aqueous acid solution at a temperature of 30 ° C. to 55 ° C. for 30 seconds to 10 minutes.
  • Subsequent rinsing is preferably performed using pure water (or deionized water), and is preferably performed two or more times, and more preferably two times.
  • One rinsing is preferably performed at a temperature of 20 ° C. to 55 ° C. for 30 seconds to 5 minutes.
  • Drying is preferably performed at a temperature of 65 to 99 ° C for 5 to 10 minutes.
  • the neutralization and sumat removal treatment in method (2) it is preferable to use the same treatment liquid used in the above surface treatment or a composition excluding caustic soda. Also, it is better to use a surfactant containing 2% or more instead of caustic soda. More preferably, 5% to 6% of sodium mesosilicate, 2% to 4% of sodium carbonate, 2% to 3% of sodium phosphate, and 2% or more of surfactant (by mass) in the aqueous solution are preferable. , 2 to 3%) Alkaline aqueous composition, particularly preferably, Na 2.1 Phosphate 2.1%, Messilicic Acid Na 5.15%, Carbonate Na 2.05%, Surfactant 2% or more (preferably 2-3) %) Is preferably used. Also, it is recommended to use a solution prepared with an effective alkalinity in the range of 56 to 60 ppm / litre, diluted with 1 to 10 times the water of the stock solution 1.
  • Neutralization Rinsing after sumat removal treatment is preferably carried out using pure water (or deionized water), preferably two or more times, and more preferably two times. Good. One rinsing is preferably performed at a temperature of 20 ° C to 55 ° C for 30 seconds to 5 minutes. Drying is preferably performed at a temperature of 65 to 99 ° C for 5 to 10 minutes.
  • FIG. 1 is a flowchart of a surface etching and degreasing cleaning system for a magnesium-based metal molded body according to the present invention.
  • the first cleaning A tank and a second washing tank are provided side by side.
  • the processing liquid is supplied to the second cleaning tank via a new liquid supply pipe, and the processing liquid is supplied from the second cleaning tank to the first cleaning tank.
  • the treatment liquid is 1 to 6% of sodium mesosilicate, 1 to 5% of sodium carbonate, sodium phosphate (weight ratio of sodium monophosphate to sodium pyrophosphate is 1/1 in weight percentage in stock solution).
  • This mixture is an aqueous solution obtained by diluting a stock solution containing 1 to 4% of the mixture (mixture) and 0.5 to 4% of caustic soda at a dilution ratio of 1: 9 to 1: 1.
  • Each of the first and second cleaning tanks is provided with a vibrator connected to an ultrasonic transmitter, and the processing liquid is supplied with an ultrasonic wave of any frequency of 25 to 133 KHz. Can act.
  • a magnesium base metal compact (thixomolded AZ-91D flat plate, lmm x 2mm thickness) to be treated is stored in the first cleaning tank and stored at 20 to 70 ° C (preferably). Is immersed for 1 to 25 minutes in the treatment liquid in the first cleaning tank in the range of 40 to 65 ° C).
  • the liquid temperature and immersion time of the treatment liquid are appropriately selected according to the cleaning conditions. Generally, the higher the liquid temperature, the higher the cleaning effect. In this cleaning, the treatment can be performed more effectively by applying ultrasonic waves having an arbitrary frequency of 25 to 133 KHz to the treatment liquid to generate cavitation on the surface of the magnesium-based metal molded body.
  • the treatment liquid in the first cleaning tank contains impurities, and the effect of the treatment liquid in the first cleaning tank decreases. Therefore, the magnesium-based metal compact is pulled up from the first cleaning tank, transferred to the second cleaning tank, and in a new processing solution, at 20 to 70 ° C. (preferably 40 to 70 ° C.) in the same manner as described above. (65 ° C) in the second cleaning tank for 1 to 25 minutes, and if necessary, apply an ultrasonic wave of any frequency of 25 to 133 KHz to the processing solution . In addition, if contamination of the processing solution in the first cleaning tank does not pose a problem, the second cleaning tank may be omitted as appropriate.
  • the magnesium-based metal molded body treated in the cleaning tank is pulled up from the second cleaning tank, moved to the first rinsing tank, and subjected to a temperature of 20 to 70 ° C (preferably 40 to 65 ° C). Rinse in a rinse of pure water in the range for 1 to 25 minutes to rinse. Also in the first rinsing tank, preferably, an ultrasonic wave having an arbitrary frequency of 25 to 133 KHz is applied to the rinsing liquid.
  • the rinse treatment liquid and contaminants are removed from the surface of the magnesium base metal molded body by rinsing in the first rinsing tank, and are contained in the rinsing liquid of the first rinsing tank, and the rinsing effect of the first rinsing tank is reduced. Fades. Therefore, the magnesium base metal molded body rinsed in the first rinsing bath is pulled up from the first rinsing bath, moved to the adjacent second rinsing bath, and then subjected to 20 to 70 ° C (preferably 40 to 65 ° C). Rinse in a rinse of pure water in the temperature range (° C) for 1-2 minutes. Preferably, an ultrasonic wave having an arbitrary frequency of 25 to 133 KHz is applied to the rinse liquid. If the contamination of the first rinsing tank is not a problem, the second rinsing tank may be omitted as appropriate.
  • the magnesium base metal compact that has been treated in the washing tank and rinsed in the rinsing tank is dried in a hot air drying tank with warm air at room temperature to 90 ° C, and then dried in vacuum. Dry in the bath.
  • the film is transferred to a surface painting treatment step or a chemical conversion treatment and an anodic oxidation treatment, and subjected to a surface painting treatment according to a known method.
  • the processing liquid (drainage) processing and the rinsing liquid processing that are preferable for the above-described magnesium-based metal molded body surface etching and degreasing cleaning system will be described below.
  • Fig. 2 shows a flow sheet for processing liquid (drainage) processing.
  • the processing liquid discharged from the first and second cleaning tanks is stored in a sub tank.
  • 1 to 10 solids are filtered through a filter. Remove and discard the filtered solids.
  • the treated liquid that has passed through the filtration filter is separated into oil and water by a simple oil and water separation tank in step 2 while the temperature is raised to 40 to 90 ° C.
  • the separated oil is incinerated as industrial waste.
  • Treatment liquid separated by oil-water separation tank device Is returned to the washing tank and reused. If the treatment liquid is contaminated to a state where it cannot be reused, it is sent from the valve to the electrolytic water purification device or ion exchange resin, and the contaminants in the electrolytic water purification device or ion exchange resin shown in Step 4 Dispose of pollutants as industrial waste (process 5).
  • Electrolytic water purification device or ion-exchange resin for example, a filter for pure ion-exchange resin of Organo Co., Ltd., and ELEC J sold by Isshin Engineering Co., Ltd. can be used.
  • FIG. 3 shows a flowchart of the rinsing liquid treatment.
  • Fresh industrial pure water or super water is first supplied to the second rinsing tank as a rinsing liquid, and then sent from the second rinsing tank to the first rinsing tank.
  • the rinsing liquid is supplied to the filter (step 11) or pure water production equipment or ion exchange resin by operating the valve.
  • Step 12 After the solid matter of 1 ⁇ to 10 ⁇ is removed in the filtration filter in step 11, the rinse liquid is returned to the first rinse tank and reused.
  • the pure water production system shown in 12 is an ion exchange resin reverse osmosis membrane system that treats the contaminated rinsing liquid so that there is no danger of environmental pollution. Release to
  • Examples of XPS wide scan spectra of the sample surface before and after treatment and washing are shown as (a) and (b) in Fig. 4, respectively.
  • the evaluation was performed by the peak integration ratio as shown here.
  • the constituent elements of the release agent are Si (silicon), C (carbon), ⁇ (oxygen), and H (hydrogen), and the characteristic one is Si (silicon).
  • the constituent elements of fats and oils are (, 0, H, etc.).
  • Figures 5 (a) and 5 (b) show the ratio of C (carbon) to the underlying Mg (magnesium) and the abundance of Si (silicon) before and after the treatment.
  • INITIAL indicates a sample before processing
  • after polishing indicates a polished sample
  • N 500A (40 ° C.) indicates the above processing solution
  • M-N500A is a sample processed by heating to 40 ° C
  • N500A (ultrasonic)” is processed while applying ultrasonic waves to the upper treatment liquid (“M-N500A”). Samples are shown.
  • the surface treatment state of the magnesium metal compact is required to be in a polished state.
  • it cannot be polished depending on the shape of the molded product, and chemical treatment is performed because the work becomes complicated when polished. Therefore, it is desirable that the state treated with the chemical solution be a polished state (a sample state indicated as “after polishing”).
  • the polished state is indicated by a horizontal line A in FIGS. 5 (a) and (b). .
  • C (carbon) and Si (silicon) are below line A. If so, it indicates that the cleaning ability is equal to or better than polishing.
  • C (carbon) is below line A as evident from FIG. 5 (a)
  • Si (silicon) is evident from FIG. 5 (b). The result was line A, and it was confirmed that both the release agent and the oil / fat could be removed in a manner similar to or greater than that obtained by polishing.
  • the etching rate (depth of etching per minute) of the above-mentioned processing solution was a maximum of about 10 m / min, which was sufficiently satisfactory.
  • the magnesium base metal compact thick molded AZ-91D plate, lmm x 2mm thickness by thixomolding method
  • the magnesium-based metal molded body surface-treated in this manner was subjected to an acid activation treatment under the following conditions.
  • Immersion time 30 seconds to 5 minutes (30 seconds, 1 minute, 1 minute 30 seconds, 2 minutes, 3 minutes, 4 minutes, 5 minutes) After that, use N-5000 or a composition excluding caustic soda from this, Washing was performed at a temperature of 60 ⁇ 5 ° C. for 60 seconds to carry out a neutralized sumat treatment.
  • the durability of the coating adhesion performance of the dried magnesium-based metal molded body was evaluated by a cross-cut salt spray test with a one-pack type epoxy-based primer applied. Did not appear on the surface. With powder single film coating, the durability was improved to 1000 hours. In addition, when a baking type acrylic metallic was applied on the one-component epoxy-based primer, the time was improved up to 240 hours. ADVANTAGE OF THE INVENTION According to this invention, washing
  • the roughness of the surface of the magnesium base metal compact does not change over the entire surface, and as a result, a uniform coating film can be formed.
  • the treatment method of the present invention is easier to manage and handle the treatment liquid than the conventional method, has low harm and low pollution, can easily treat harmful waste liquid and wastewater, and greatly reduces environmental pollution. Can be suppressed.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

La présente invention concerne un procédé de traitement d'article métallique à base de magnésium, caractérisé en ce qu'il consiste à plonger l'article métallique à base de magnésium dans une solution de traitement contenant comme principaux composants du métasilicate de sodium, du phosphate de sodium et de l'hydroxyde de sodium, permettant ainsi de procéder au nettoyage et à l'attaque chimique. Ce procédé permet d'effectuer simultanément le nettoyage et l'attaque chimique du métal et ne produit par de substances dangereuses lors du traitement. Par conséquent, ce procédé permet d'accroître d'adhérence du métal avec un film de protection et d'améliorer ainsi sa résistance à la corrosion et à la rouille, et de procéder simultanément au dégraissage, au nettoyage et à l'attaque.
PCT/JP2000/000920 1999-02-25 2000-02-18 Procede de traitement d'article metallique a base de magnesium et solution de traitement associee WO2000050666A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU25736/00A AU2573600A (en) 1999-02-25 2000-02-18 Method for treating magnesium-based metal formed article and treating solution therefor

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Application Number Priority Date Filing Date Title
JP4753899 1999-02-25
JP11/47538 1999-02-25

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WO2000050666A1 true WO2000050666A1 (fr) 2000-08-31

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Cited By (11)

* Cited by examiner, † Cited by third party
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JP2003064482A (ja) * 2001-08-24 2003-03-05 Mitsui Mining & Smelting Co Ltd マグネシウム合金の塗装下地処理方法及び塗装方法
WO2003044243A1 (fr) * 2001-11-21 2003-05-30 Nippon Paint Co., Ltd. Procede de traitement de surface pour magnesium et/ou alliage de magnesium, et produit en magnesium et/ou en alliage de magnesium
JP3524510B2 (ja) 2001-03-21 2004-05-10 株式会社日本製鋼所 マグネシウム合金成形品の表面処理方法
JP2006117988A (ja) * 2004-10-20 2006-05-11 Furukawa Co Ltd マグネシウム合金の表面処理方法
WO2008065713A1 (fr) * 2006-11-28 2008-06-05 Magnes, Co., Ltd. Intermédiaire de magnésium ou d'un alliage à base de magnésium et son procédé de fabrication
KR101217728B1 (ko) * 2010-03-03 2013-01-02 이종현 높은 수율의 마그네슘 모재의 도금 방법
CN104947126A (zh) * 2015-07-14 2015-09-30 山东省科学院新材料研究所 一种镁合金清洗剂
JP2017172013A (ja) * 2016-03-24 2017-09-28 富士通株式会社 部品、及び部品の製造方法、並びに表面処理方法
CN107447212A (zh) * 2017-06-02 2017-12-08 上海航天设备制造总厂 镁合金零件的表面处理方法
KR20210078990A (ko) * 2019-12-19 2021-06-29 전북대학교산학협력단 저농도 알칼리 용액에서의 초음파 침지 세척 및 고온 건조에 의한 타이타늄 스크랩 전처리 방법
CN114369825A (zh) * 2021-12-10 2022-04-19 上海航天设备制造总厂有限公司 Zm6铸镁合金表面多层化学镀镍方法

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JP3524510B2 (ja) 2001-03-21 2004-05-10 株式会社日本製鋼所 マグネシウム合金成形品の表面処理方法
JP2003064482A (ja) * 2001-08-24 2003-03-05 Mitsui Mining & Smelting Co Ltd マグネシウム合金の塗装下地処理方法及び塗装方法
WO2003044243A1 (fr) * 2001-11-21 2003-05-30 Nippon Paint Co., Ltd. Procede de traitement de surface pour magnesium et/ou alliage de magnesium, et produit en magnesium et/ou en alliage de magnesium
JP2006117988A (ja) * 2004-10-20 2006-05-11 Furukawa Co Ltd マグネシウム合金の表面処理方法
JP4541100B2 (ja) * 2004-10-20 2010-09-08 古河機械金属株式会社 マグネシウム合金の表面処理方法
WO2008065713A1 (fr) * 2006-11-28 2008-06-05 Magnes, Co., Ltd. Intermédiaire de magnésium ou d'un alliage à base de magnésium et son procédé de fabrication
KR101217728B1 (ko) * 2010-03-03 2013-01-02 이종현 높은 수율의 마그네슘 모재의 도금 방법
CN104947126A (zh) * 2015-07-14 2015-09-30 山东省科学院新材料研究所 一种镁合金清洗剂
CN104947126B (zh) * 2015-07-14 2018-04-06 山东省科学院新材料研究所 一种镁合金清洗剂
JP2017172013A (ja) * 2016-03-24 2017-09-28 富士通株式会社 部品、及び部品の製造方法、並びに表面処理方法
CN107447212A (zh) * 2017-06-02 2017-12-08 上海航天设备制造总厂 镁合金零件的表面处理方法
KR20210078990A (ko) * 2019-12-19 2021-06-29 전북대학교산학협력단 저농도 알칼리 용액에서의 초음파 침지 세척 및 고온 건조에 의한 타이타늄 스크랩 전처리 방법
KR102271746B1 (ko) * 2019-12-19 2021-07-01 전북대학교산학협력단 저농도 알칼리 용액에서의 초음파 침지 세척 및 고온 건조에 의한 타이타늄 스크랩 전처리 방법
CN114369825A (zh) * 2021-12-10 2022-04-19 上海航天设备制造总厂有限公司 Zm6铸镁合金表面多层化学镀镍方法

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