CN113046672A - Rare earth multi-element alloy coating for surface of metal support and hanger and hot galvanizing process thereof - Google Patents
Rare earth multi-element alloy coating for surface of metal support and hanger and hot galvanizing process thereof Download PDFInfo
- Publication number
- CN113046672A CN113046672A CN202110265974.2A CN202110265974A CN113046672A CN 113046672 A CN113046672 A CN 113046672A CN 202110265974 A CN202110265974 A CN 202110265974A CN 113046672 A CN113046672 A CN 113046672A
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- China
- Prior art keywords
- metal support
- hanger
- rare earth
- alloy coating
- plating
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
Abstract
The invention discloses a rare earth multi-element alloy coating for the surface of a metal support and hanger and a hot galvanizing process thereof, wherein the alloy coating comprises the following components in percentage by mass: 12-16% of Al, 1.5-3% of Mg, 0.1-0.5% of Sc0.1, 0.05-0.1% of Sr, 0.02-0.06% of Dy, 0.01-0.05% of Ce, 0.03-0.06% of V, less than or equal to 0.01% of Nd, and the balance of Zn and inevitable impurities; rare earth elements (Ce, Nd and Dy) are added in the formula, so that the wettability and the flowability of molten metal are obviously improved, the microstructure of the metal is refined while the molten metal is purified, the plasticity of the alloy is improved, and the alloy is better attached to and protected against the surface of a metal material; the addition of V in cooperation with Ce improves the corrosion resistance of the alloy coating, and in the presence of Sr, Sc can change the microstructure of the alloy coating by inhibiting intermetallic phases along grain boundaries and improve the corrosion resistance of the alloy coating by forming a chemically stable Sc oxide layer on the surface of the Mg alloy.
Description
Technical Field
The invention relates to an alloy coating material, in particular to a rare earth multi-element alloy coating for the surface of a metal support and hanger and a hot galvanizing process thereof.
Background
The supporting and hanging bracket is used for a cable bridge frame and is a main part for supporting the cable bridge and a cable; the novel vertical column comprises a vertical column, a vertical column base, a supporting arm and the like, has the advantages of simple structure, light weight, low cost, high strength, attractive appearance and the like, and can meet the requirements of different environmental conditions for installation in different forms; the support and hanger frame is generally made of metal, the application environment is usually exposed in the air, if the anticorrosion work is not done, more corrosion can be generated, the service life of the support and hanger frame is also influenced, and the service life of the support is also influenced, so that the function of fixing the pipeline by the support is lost;
the traditional anticorrosion means is to adopt a pure zinc coating which is a main cathode component, sacrifice a cathode and protect an internal steel material, the process is simple, the anticorrosion performance is good, the steel material is generally applied, and along with the development of scientific technology and the progress of human society, the traditional coating type can not meet the anticorrosion requirement, so that a novel alloy coating with excellent performance needs to be developed.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a rare earth multi-element alloy coating for the surface of a metal support hanger, which comprises the following components in percentage by mass: 12-16% of Al, 1.5-3% of Mg, 0.1-0.5% of Sc, 0.05-0.1% of Sr, 0.02-0.06% of Dy, 0.01-0.05% of Ce, 0.03-0.06% of V, less than or equal to 0.01% of Nd, and the balance of Zn and inevitable impurities.
Preferably, the alloy plating layer comprises the following components in percentage by mass: 15% of Al, 2% of Mg, 0.2% of Sc, 0.08% of Sr, 0.03% of Dy, 0.02% of Ce, 0.04% of V, less than or equal to 0.01% of Nd, and the balance of Zn and inevitable impurities.
Preferably, the hot galvanizing process of the rare earth multi-element alloy coating for the surface of the metal support hanger comprises the following steps:
(1) weighing and preparing raw materials according to the required element composition and the weight ratio thereof, smelting to obtain a rare earth multi-element alloy melt, and preparing a plating material for later use;
(2) pre-cleaning a metal support hanger to be hot-dipped by clear water, and testing a test piece by using pH test paper to ensure that the pH value is within the range of 6-8;
(3) immersing the pre-cleaned metal support hanger into a plating assistant agent for plating assistant, and drying the metal support hanger after plating assistant is finished;
(4) and (3) immersing the metal support and hanger subjected to the assistant plating into a plating material for hot dip plating, then passivating the metal support and hanger subjected to the hot dip plating, and unloading the parts to obtain the metal support and hanger coated with the rare earth multi-element alloy plating layer.
Preferably, the plating assistant solution comprises the following components in parts by weight: 100 parts of deionized water, 50 parts of zinc chloride, 28 parts of ammonium chloride and 5 parts of manganese chloride.
Preferably, the hot dipping temperature is 400-650 ℃, and the dipping time is 2-5 min.
Compared with the prior art, the invention has the beneficial effects that:
(1) by adjusting and treating the components, the alloy coating of the metal support and hanger has higher mechanical property and better corrosion resistance, and the service life of the support and hanger is prolonged;
(2) rare earth elements (Ce, Nd and Dy) are added into the formula, so that the wettability and the flowability of molten metal are obviously improved, the microstructure of the metal is refined while the molten metal is purified, the plasticity of the alloy is improved, the alloy is better attached and protected with the surface of a metal material, and meanwhile, the corrosion resistance of a Zn-Al alloy coating can be obviously improved by the aid of an auxiliary material Al which is matched with Zn;
(3) the addition of V in cooperation with Ce improves the corrosion resistance of the alloy coating, and in the presence of Sr, Sc can change the microstructure of the alloy coating by inhibiting intermetallic phases along grain boundaries and improve the corrosion resistance of the alloy coating by forming a chemically stable Sc oxide layer on the surface of the Mg alloy.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.
Example 1
A rare earth multi-element alloy coating for the surface of a metal support hanger comprises the following components in percentage by mass: 15% of Al, 2% of Mg, 0.2% of Sc, 0.08% of Sr, 0.03% of Dy, 0.02% of Ce, 0.04% of V, less than or equal to 0.01% of Nd, and the balance of Zn and inevitable impurities.
Example 2
A rare earth multi-element alloy coating for the surface of a metal support hanger comprises the following components in percentage by mass: 13% of Al, 2.5% of Mg, 0.3% of Sc, 0.05% of Sr, 0.02% of Dy, 0.03% of Ce, 0.06% of V, less than or equal to 0.01% of Nd, and the balance of Zn and inevitable impurities.
Example 3
A rare earth multi-element alloy coating for the surface of a metal support hanger comprises the following components in percentage by mass: 16% of Al, 1.5% of Mg, 0.3% of Sc, 0.09% of Sr, 0.03% of Dy, 0.02% of Ce, 0.04% of V, less than or equal to 0.01% of Nd, and the balance of Zn and inevitable impurities.
The hot galvanizing process of the rare earth multi-element alloy coating of the embodiment 1 to 3 comprises the following steps:
(1) weighing and preparing raw materials according to the required element composition and the weight ratio thereof, smelting to obtain a rare earth multi-element alloy melt, and preparing a plating material for later use;
(2) pre-cleaning a metal support hanger to be hot-dipped by clear water, and testing a test piece by using pH test paper to ensure that the pH value is within the range of 6-8;
(3) immersing the pre-cleaned metal support hanger into a plating assistant agent for plating assistant, and drying the metal support hanger after plating assistant is finished;
(4) and (3) immersing the metal support and hanger subjected to the assistant plating into a plating material for hot dip plating, then passivating the metal support and hanger subjected to the hot dip plating, and unloading the parts to obtain the metal support and hanger coated with the rare earth multi-element alloy plating layer.
In the technical scheme, the plating assistant solution comprises the following components in parts by weight: 100 parts of deionized water, 50 parts of zinc chloride, 28 parts of ammonium chloride and 5 parts of manganese chloride.
In the technical scheme, the hot dipping temperature is 400-650 ℃, and the dipping time is 2-5 min.
Performance testing
The metal hanger coated with the rare earth multi-element alloy plating layers manufactured in examples 1 to 3 was subjected to a performance test, and the test results are shown in table 1;
the uniformity verification method comprises the following steps: and (3) soaking the sample in a copper sulfate solution for 1min, taking out the sample, flushing with running water, brushing off black precipitates with a soft brush, immediately etching the sample after the black precipitates are wiped clean, and taking an etching end point when red metal copper appears on the sample.
The salt spray test is verified by the GB/T2423.17-2008 method, the concentration of the salt solution (NaCl) is (5 +/-1)% (mass ratio), and the test period is 48 h.
TABLE 1
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The rare earth multi-element alloy coating for the surface of the metal support hanger is characterized by comprising the following components in percentage by mass: 12-16% of Al, 1.5-3% of Mg, 0.1-0.5% of Sc, 0.05-0.1% of Sr, 0.02-0.06% of Dy, 0.01-0.05% of Ce, 0.03-0.06% of V, less than or equal to 0.01% of Nd, and the balance of Zn and inevitable impurities.
2. The rare earth multi-element alloy coating for the surface of the metal support hanger frame as claimed in claim 1, wherein the alloy coating comprises the following components in percentage by mass: 15% of Al, 2% of Mg, 0.2% of Sc, 0.08% of Sr, 0.03% of Dy, 0.02% of Ce, 0.04% of V, less than or equal to 0.01% of Nd, and the balance of Zn and inevitable impurities.
3. The process for hot galvanizing a rare earth multi-element alloy coating on the surface of a metal support and hanger according to claim 1, comprising the following steps:
(1) weighing and preparing raw materials according to the required element composition and the weight ratio thereof, smelting to obtain a rare earth multi-element alloy melt, and preparing a plating material for later use;
(2) pre-cleaning a metal support hanger to be hot-dipped by clear water, and testing a test piece by using pH test paper to ensure that the pH value is within the range of 6-8;
(3) immersing the pre-cleaned metal support hanger into a plating assistant agent for plating assistant, and drying the metal support hanger after plating assistant is finished;
(4) and (3) immersing the metal support and hanger subjected to the assistant plating into a plating material for hot dip plating, then passivating the metal support and hanger subjected to the hot dip plating, and unloading the parts to obtain the metal support and hanger coated with the rare earth multi-element alloy plating layer.
4. The rare earth multi-element alloy coating for the surface of the metal support hanger bracket as claimed in claim 3, wherein the plating assistant solution comprises the following components in parts by weight: 100 parts of deionized water, 50 parts of zinc chloride, 28 parts of ammonium chloride and 5 parts of manganese chloride.
5. The rare earth multi-element alloy coating for the surface of the metal support hanger as claimed in claim 3, wherein the hot dipping temperature is 400-650 ℃, and the dipping time is 2-5 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110265974.2A CN113046672A (en) | 2021-03-11 | 2021-03-11 | Rare earth multi-element alloy coating for surface of metal support and hanger and hot galvanizing process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110265974.2A CN113046672A (en) | 2021-03-11 | 2021-03-11 | Rare earth multi-element alloy coating for surface of metal support and hanger and hot galvanizing process thereof |
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| Publication Number | Publication Date |
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| CN113046672A true CN113046672A (en) | 2021-06-29 |
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| CN202110265974.2A Pending CN113046672A (en) | 2021-03-11 | 2021-03-11 | Rare earth multi-element alloy coating for surface of metal support and hanger and hot galvanizing process thereof |
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Citations (6)
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|---|---|---|---|---|
| CN102268625A (en) * | 2011-08-03 | 2011-12-07 | 江苏大学 | Method for hot dipping aluminum for steel structure |
| CN103131990A (en) * | 2011-11-29 | 2013-06-05 | 贵州铝厂 | Sr and multi-combination-metamorphism low-zinc hot-dipping-coating aluminum alloy coating materials |
| CN103620079A (en) * | 2011-06-30 | 2014-03-05 | 新日铁住金株式会社 | High-corrosion-resistance hot-dip galvanized steel plate having highly uniform appearance and manufacturing method therefor |
| CN104711502A (en) * | 2013-12-15 | 2015-06-17 | 河南省电力勘测设计院 | Corrosion-resistant Zn-Al-Mg rare earth alloy coating, preparation and hot dipping method thereof |
| WO2020130482A1 (en) * | 2018-12-19 | 2020-06-25 | 주식회사 포스코 | Zinc alloy-plated steel material having excellent corrosion resistance and surface quality, and method for producing same |
| WO2020179148A1 (en) * | 2019-03-01 | 2020-09-10 | Ｊｆｅ鋼板株式会社 | Hot-dip al−zn−mg−si−sr plated steel sheet and production method therefor |
-
2021
- 2021-03-11 CN CN202110265974.2A patent/CN113046672A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103620079A (en) * | 2011-06-30 | 2014-03-05 | 新日铁住金株式会社 | High-corrosion-resistance hot-dip galvanized steel plate having highly uniform appearance and manufacturing method therefor |
| CN102268625A (en) * | 2011-08-03 | 2011-12-07 | 江苏大学 | Method for hot dipping aluminum for steel structure |
| CN103131990A (en) * | 2011-11-29 | 2013-06-05 | 贵州铝厂 | Sr and multi-combination-metamorphism low-zinc hot-dipping-coating aluminum alloy coating materials |
| CN104711502A (en) * | 2013-12-15 | 2015-06-17 | 河南省电力勘测设计院 | Corrosion-resistant Zn-Al-Mg rare earth alloy coating, preparation and hot dipping method thereof |
| WO2020130482A1 (en) * | 2018-12-19 | 2020-06-25 | 주식회사 포스코 | Zinc alloy-plated steel material having excellent corrosion resistance and surface quality, and method for producing same |
| WO2020179148A1 (en) * | 2019-03-01 | 2020-09-10 | Ｊｆｅ鋼板株式会社 | Hot-dip al−zn−mg−si−sr plated steel sheet and production method therefor |
Non-Patent Citations (1)
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