CN113235082A - Surface treatment process of aluminum alloy section - Google Patents
Surface treatment process of aluminum alloy section Download PDFInfo
- Publication number
- CN113235082A CN113235082A CN202110598105.1A CN202110598105A CN113235082A CN 113235082 A CN113235082 A CN 113235082A CN 202110598105 A CN202110598105 A CN 202110598105A CN 113235082 A CN113235082 A CN 113235082A
- Authority
- CN
- China
- Prior art keywords
- aluminum alloy
- alloy section
- washing
- pure water
- treatment process
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- 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
- C23C22/73—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 characterised by the process
-
- 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
- C23C22/24—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 hexavalent chromium compounds
-
- 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
- C23C22/78—Pretreatment of the material to be coated
Abstract
The invention relates to the technical field of surface treatment of aluminum alloy sections and discloses a surface treatment process of an aluminum alloy section, which comprises the following steps of degreasing; step two, washing with water; step three, emitting light; washing, namely washing the surface of the aluminum alloy section by using tap water and then pure water; step five, chromizing; step six, washing with pure water; step seven, washing with hot pure water; and step eight, drying. According to the surface treatment process of the aluminum alloy section, the corrosion resistance and the wear resistance of the aluminum alloy section are greatly improved through the improvement of the aluminum alloy chromizing process, the abrasion of dust to the aluminum alloy section is reduced, and the attractiveness of the aluminum alloy section is improved.
Description
Technical Field
The invention relates to the technical field of surface treatment of aluminum alloy sections, in particular to a surface treatment process of an aluminum alloy section.
Background
The aluminum alloy is an alloy which is based on aluminum and added with a certain amount of other alloying elements, is one of light metal materials, has the common characteristics of aluminum, has the specific characteristics of certain alloys due to the difference of the types and the quantity of the added alloying elements, has the density of 2.63-2.85 g/cm, has higher strength, specific strength close to high alloy steel, specific stiffness exceeding steel, good casting performance and plastic processing performance, good electric conduction and heat conduction performance, good corrosion resistance and weldability, can be used as a structural material, has wide application in aerospace, aviation, transportation, construction, electromechanics, lightening and daily necessities, and is a type of nonferrous metal structural material which is most widely applied in industry.
The aluminum alloy chromizing treatment is a common pretreatment method for aluminum alloy sections, a passivation film is formed on the surface of the aluminum alloy section through a chemical reaction, the corrosion resistance of a product and the adhesive force of a coating are enhanced, the chromizing is a process of generating a trivalent or hexavalent chromizing layer on the surface of the aluminum alloy section by using a chromate solution and a metal, the chromate solution is mostly used for treating aluminum, magnesium and alloys thereof, the chromate layer can be formed on steel, but the chromate layer is rarely used independently and is often used in combination with phosphorization to seal pores of the phosphorizing layer, so that the exposed steel in the phosphorizing layer is passivated to inhibit the corrosion action of a residual phosphorizing accelerator, the protective capability is further increased, a potassium dichromate solution (2-4 g/L and sometimes 1-2 g of phosphoric acid) is generally used during passivation, and the aluminum alloy sections are soaked for 2-3 minutes at 80-90 ℃ and then are taken out and washed with water.
The prior art has the following defects and shortcomings:
at present, the application of aluminum alloy is very extensive, there is the shortcoming of poor corrosion resistance and poor wear resistance in the aluminum alloy in the in-service use, in the environment that the dust is many or humidity is big and receive corrosion damage easily, especially the building trade, the dust concentration is high in the building site, can cause great damage to the aluminum alloy, and the dust can cause serious influence to aluminum alloy surface gloss, lead to the door and window of aluminum alloy material etc. to receive behind the corruption very pleasing to the eye, and life can greatly reduced, the dangerous condition also can increase appears, follow-up user's personal safety has seriously been influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a surface treatment process of an aluminum alloy section, which can solve the problems that the surface of the existing aluminum alloy section is in an environment with much dust or high humidity and is easy to be corroded and damaged; the surface treatment process for the aluminum alloy section is advanced, and a layer of passivation film is formed on the surface of the aluminum alloy section through chemical reaction, so that the corrosion resistance and the adhesive force of a coating of the aluminum alloy section can be obviously enhanced, and the problems are effectively solved.
In order to achieve the purpose of the surface treatment process of the aluminum alloy section, the invention provides the following technical scheme: a surface treatment process of an aluminum alloy section comprises the following steps,
degreasing, namely removing oil stains on the surface of the aluminum alloy section by using alkaline degreasing fluid, and properly heating and continuously stirring in the degreasing process;
step two, washing, namely, after degreasing, cleaning degreasing liquid attached to the surface of the aluminum alloy section by using tap water;
step three, light extraction, namely removing salt corrosion residues remained on the surface of the degreased aluminum alloy section;
washing, namely washing the surface of the aluminum alloy section by using tap water and then pure water, and thoroughly removing residues attached to the surface of the aluminum alloy section;
performing chromizing, namely performing chromizing treatment on the surface of the aluminum alloy section by using a chromate solution;
step six, washing with pure water, and washing with overflowing pure water after chromizing;
step seven, carrying out hot pure water washing, namely washing with normal-temperature water, and then completely removing chromates on the surface of the aluminum alloy section by using the hot pure water washing;
and step eight, drying, namely drying the surface of the aluminum alloy section.
Preferably, the temperature of the reaction tank liquid in the degreasing process in the first step is 60-65 ℃, the concentration of the alkaline degreasing liquid is prepared according to the specification, the surface dipping time of the alkaline degreasing liquid and the aluminum alloy section bar is 5-7min, and the degreasing circulation state adopts an ultrasonic oscillation mode.
Preferably, the second step of water washing is carried out in a water washing tank, the water washing tank is designed to be in an automatic overflow mode, the temperature of the water washing tank is normal temperature, the total alkalinity of the water washing tank is less than or equal to 1.0, and the water washing dipping time is 30-40 s.
Preferably, the bright dipping liquid in the third step is an acidic liquid, the concentration of the acidic liquid is prepared according to the product specification, and the dipping time of the bright dipping liquid and the surface of the aluminum alloy section is 2-3 min.
Preferably, the temperature of tap water in the fourth step is normal temperature, the total acidity is less than or equal to 1.0, the surface immersion time of the tap water and the aluminum alloy section is 30s, the temperature of pure water is normal temperature, and the conductivity is less than or equal to 100 us/cm.
Preferably, the concentration of the chromate solution in the step is 12-14g/L, the pH is 1.3-1.6, and the time for soaking the chromate solution and the surface of the aluminum alloy section is 3-6 min.
Preferably, the temperature of pure water in the sixth step is normal temperature, a reverse water replenishing mode is adopted, and the time for soaking the pure water and the surface of the aluminum alloy section is 30 s.
Preferably, the temperature of the hot pure water in the seventh step is 50-60 ℃, the conductivity is less than or equal to 100us/cm, and the immersion time of the hot pure water and the surface of the aluminum alloy section is 30 s.
Preferably, the drying temperature in the step eight is 50-60 ℃, and the drying time is 5-15 min.
Compared with the prior art, the invention provides a surface treatment process of an aluminum alloy section, which has the following beneficial effects:
this surface treatment process of aluminum alloy ex-trusions, through the improvement to aluminum alloy chromizing process, promoted aluminum alloy ex-trusions's corrosion resistance and wearability by a wide margin, reduced the wearing and tearing of dust to aluminum alloy ex-trusions, promoted aluminum alloy ex-trusions's aesthetic property, also promoted aluminum alloy ex-trusions's life simultaneously, reduced the possibility of aluminum alloy product damage, promoted follow-up user's personal safety by a wide margin.
Drawings
FIG. 1 is a schematic view of the process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a surface treatment process for an aluminum alloy profile includes the following steps,
degreasing, namely removing oil stains on the surface of the aluminum alloy section by using alkaline degreasing fluid, and properly heating and continuously stirring in the degreasing process;
step two, washing, namely, after degreasing, cleaning degreasing liquid attached to the surface of the aluminum alloy section by using tap water;
step three, light extraction, namely removing salt corrosion residues remained on the surface of the degreased aluminum alloy section;
washing, namely washing the surface of the aluminum alloy section by using tap water and then pure water, and thoroughly removing residues attached to the surface of the aluminum alloy section;
performing chromizing, namely performing chromizing treatment on the surface of the aluminum alloy section by using a chromate solution;
step six, washing with pure water, and washing with overflowing pure water after chromizing;
step seven, carrying out hot pure water washing, namely washing with normal-temperature water, and then completely removing chromates on the surface of the aluminum alloy section by using the hot pure water washing;
and step eight, drying, namely drying the surface of the aluminum alloy section.
In conclusion, in the first degreasing step, the temperature of the reaction tank liquid is 60-65 ℃, the concentration of the alkaline degreasing liquid is prepared according to the specification, the surface impregnation time of the alkaline degreasing liquid and the aluminum alloy section is 5-7min, the degreasing cycle state adopts an ultrasonic oscillation mode, the chemical reaction is accelerated by properly heating and continuously stirring, and the degreasing effect is enhanced; washing is carried out in a washing tank, the washing tank is designed to be in an automatic overflow mode, the temperature of the washing tank is normal temperature, the total alkalinity of the washing tank liquid is less than or equal to 1.0, the washing immersion time is 30-40 s, degreasing liquid attached to the surface of the aluminum alloy section is cleaned by tap water after degreasing, and the washing tank is designed to be in an automatic overflow mode so as to ensure that water in the tank is not seriously polluted; step three, the bright dipping liquid is acid liquid, the concentration is prepared according to the product specification, the bright dipping time of the bright dipping liquid and the surface of the aluminum alloy section is 2-3min, and the bright dipping aim is to remove the residual salt corrosion residues on the surface of the degreased aluminum alloy section; fourthly, the temperature of tap water is normal temperature, the total acidity is less than or equal to 1.0, the immersion time of the tap water and the surface of the aluminum alloy section is 30s, the temperature of pure water is normal temperature, the conductivity is less than or equal to 100us/cm, the tap water is used for the first time, the pure water is used for the second time, the pollution of the tap water is prevented, and the residues attached to the surface of the aluminum alloy section are thoroughly removed by two-time washing; the concentration of a chromate solution in the step is 12-14g/L, the pH value is 1.3-1.6, the surface dipping time of the chromate solution and the aluminum alloy section is 3-6min, and the chromizing quality directly influences the corrosion resistance of the aluminum alloy section and the binding force of a coating; sixthly, soaking the surfaces of the pure water and the aluminum alloy section for 30s in a reverse water replenishing mode at normal temperature, and washing the surface of the aluminum alloy section by using overflowing pure water after chromizing; seventhly, soaking the surface of the aluminum alloy section in hot pure water for 30s at the temperature of 50-60 ℃, wherein the conductivity is less than or equal to 100us/cm, washing the surface of the aluminum alloy section with the hot pure water at normal temperature, and then completely removing chromates on the surface of the aluminum alloy section by washing with the hot pure water; and step eight, drying at the temperature of 50-60 ℃ for 5-15min, wherein the drying time can be adjusted according to the water and the structure of the aluminum alloy section, and the drying temperature cannot be too high so as to prevent the chromizing layer from aging.
The working use process and the installation method of the aluminum alloy section bar surface treatment process provided by the invention have the advantages that when the aluminum alloy section bar surface treatment process is used, the corrosion resistance and the wear resistance of the aluminum alloy section bar are greatly improved through the improvement of the aluminum alloy chromizing process, the abrasion of dust to the aluminum alloy section bar is reduced, the attractiveness of the aluminum alloy section bar is improved, meanwhile, the service life of the aluminum alloy section bar is prolonged, the possibility of damage of an aluminum alloy product is reduced, and the personal safety of subsequent users is greatly improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A surface treatment process of an aluminum alloy profile is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
degreasing, namely removing oil stains on the surface of the aluminum alloy section by using alkaline degreasing fluid, and properly heating and continuously stirring in the degreasing process;
step two, washing, namely, after degreasing, cleaning degreasing liquid attached to the surface of the aluminum alloy section by using tap water;
step three, light extraction, namely removing salt corrosion residues remained on the surface of the degreased aluminum alloy section;
washing, namely washing the surface of the aluminum alloy section by using tap water and then pure water, and thoroughly removing residues attached to the surface of the aluminum alloy section;
performing chromizing, namely performing chromizing treatment on the surface of the aluminum alloy section by using a chromate solution;
step six, washing with pure water, and washing with overflowing pure water after chromizing;
step seven, carrying out hot pure water washing, namely washing with normal-temperature water, and then completely removing chromates on the surface of the aluminum alloy section by using the hot pure water washing;
and step eight, drying, namely drying the surface of the aluminum alloy section.
2. The surface treatment process of an aluminum alloy profile according to the first step of claim 1, characterized in that: in the degreasing process, the temperature of a reaction tank liquid is 60-65 ℃, the concentration of an alkaline degreasing liquid is prepared according to a specification, the surface impregnation time of the alkaline degreasing liquid and the aluminum alloy section is 5-7min, and an ultrasonic oscillation mode is adopted in a degreasing circulation state.
3. The surface treatment process of an aluminum alloy profile according to the step two of claim 1, characterized in that: the water washing is carried out in a water washing tank, the water washing tank is designed to be in an automatic overflow mode, the temperature of the water washing tank is normal temperature, the total alkalinity of the water washing tank is less than or equal to 1.0, and the water washing dipping time is 30-40 s.
4. The surface treatment process of an aluminum alloy profile according to the third step of claim 1, characterized in that: the brightening liquid is an acidic liquid, the concentration is prepared according to the product specification, and the brightening liquid and the surface of the aluminum alloy section are soaked for 2-3 min.
5. The surface treatment process of an aluminum alloy profile according to the fourth step of claim 1, characterized in that: the temperature of tap water is normal temperature, the total acidity is less than or equal to 1.0, the surface immersion time of the tap water and the aluminum alloy section is 30s, the temperature of pure water is normal temperature, and the conductivity is less than or equal to 100 us/cm.
6. The surface treatment process of an aluminum alloy profile according to the step five of claim 1, characterized in that: the concentration of the chromate solution is 12-14g/L, the PH value is 1.3-1.6, and the surface dipping time of the chromate solution and the aluminum alloy section is 3-6 min.
7. The surface treatment process of an aluminum alloy profile according to the sixth step of claim 1, characterized in that: the pure water temperature is normal temperature, a reverse water replenishing mode is adopted, and the pure water and the surface of the aluminum alloy section are soaked for 30 s.
8. The surface treatment process of an aluminum alloy profile according to claim 1, step seven, characterized in that: the temperature of the hot pure water is 50-60 ℃, the conductivity is less than or equal to 100us/cm, and the surface dipping time of the hot pure water and the aluminum alloy section is 30 s.
9. The surface treatment process of an aluminum alloy profile according to the step eight of claim 1, characterized in that: the drying temperature is 50-60 ℃, and the drying time is 5-15 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110598105.1A CN113235082A (en) | 2021-05-31 | 2021-05-31 | Surface treatment process of aluminum alloy section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110598105.1A CN113235082A (en) | 2021-05-31 | 2021-05-31 | Surface treatment process of aluminum alloy section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113235082A true CN113235082A (en) | 2021-08-10 |
Family
ID=77135845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110598105.1A Pending CN113235082A (en) | 2021-05-31 | 2021-05-31 | Surface treatment process of aluminum alloy section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113235082A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115404483A (en) * | 2022-08-16 | 2022-11-29 | 浙江鸿昌铝业有限公司 | Surface treatment process of aluminum alloy section |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108707888A (en) * | 2018-06-21 | 2018-10-26 | 湖北安登环保科技有限公司 | A kind of aluminum alloy surface passivation process improving corrosion resistance |
| CN109576693A (en) * | 2018-12-05 | 2019-04-05 | 嘉兴金信铝容器有限公司 | A kind of chromaking treatment process of food-grade aluminium foil |
-
2021
- 2021-05-31 CN CN202110598105.1A patent/CN113235082A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108707888A (en) * | 2018-06-21 | 2018-10-26 | 湖北安登环保科技有限公司 | A kind of aluminum alloy surface passivation process improving corrosion resistance |
| CN109576693A (en) * | 2018-12-05 | 2019-04-05 | 嘉兴金信铝容器有限公司 | A kind of chromaking treatment process of food-grade aluminium foil |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115404483A (en) * | 2022-08-16 | 2022-11-29 | 浙江鸿昌铝业有限公司 | Surface treatment process of aluminum alloy section |
| CN115404483B (en) * | 2022-08-16 | 2023-10-03 | 浙江鸿昌铝业有限公司 | Surface treatment process of aluminum alloy profile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102994926A (en) | Hot dip galvanizing process method | |
| CN105603349A (en) | Hot galvanizing process | |
| MXPA04004237A (en) | Post-treatment for metal coated substrates. | |
| US20090014094A1 (en) | Methods for Reducing Hexavalent Chromium in Trivalent Chromate Conversion Coatings | |
| JP2005538249A (en) | Surface treatment of magnesium and magnesium alloys | |
| CN102321881A (en) | Chromium-free passivation surface treatment process of aluminium material | |
| CN113235082A (en) | Surface treatment process of aluminum alloy section | |
| CN108950447A (en) | A kind of metal works zincincation | |
| NO873904L (en) | DISEASING PASSIVATION BY MULTIMETAL METAL PROGRESS. | |
| CN109839347A (en) | A kind of corrosion-resistant test technology of automobile decoration piece product treatment | |
| CN103526245A (en) | New environment-friendly process for chromium barrel plating after chloride zinc plating | |
| US9039821B2 (en) | Methods and compositions for coating aluminum substrates | |
| KR101187354B1 (en) | Zinc hot dip galvanizing method by using omission technology of water washing | |
| CA2536765A1 (en) | Protective coating for automotive trim pieces and method of making the same | |
| CN103741084A (en) | Multi-purpose ammonium-free fluxing agent for hot dip coating and application method thereof | |
| CN105420727A (en) | Anticorrosion treatment process of zinc alloy die casting | |
| CN106868438A (en) | Steel structure zincincation | |
| CN113862741A (en) | Treatment method for improving corrosion resistance of zinc-nickel alloy coating | |
| WO2005014890A1 (en) | An electrolyte solution | |
| CN102560516B (en) | Magnesium alloy surface homogenization pretreatment process | |
| CN109055880B (en) | Electrophoresis process after galvanization | |
| KR100436597B1 (en) | Method for plating with molten aluminum | |
| CN109385649A (en) | A kind of crisp acid cyanideless electro-plating zinc technology method of low hydrogen | |
| TWI806422B (en) | Highly anti-corrosion layered structure and manufacturing method thereof | |
| JPS6092483A (en) | Production of galvanized steel sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210810 |
|
| WD01 | Invention patent application deemed withdrawn after publication |