CN116987997A - Surface blackened high-aluminum hot dip coating steel plate and manufacturing method thereof - Google Patents
Surface blackened high-aluminum hot dip coating steel plate and manufacturing method thereof Download PDFInfo
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- CN116987997A CN116987997A CN202310914694.9A CN202310914694A CN116987997A CN 116987997 A CN116987997 A CN 116987997A CN 202310914694 A CN202310914694 A CN 202310914694A CN 116987997 A CN116987997 A CN 116987997A
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- blackened
- steel sheet
- aluminum
- steel plate
- hot
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 47
- 239000010959 steel Substances 0.000 title claims abstract description 47
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 23
- 238000003618 dip coating Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 229910000765 intermetallic Inorganic materials 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 3
- 229910018084 Al-Fe Inorganic materials 0.000 claims abstract description 3
- 229910018192 Al—Fe Inorganic materials 0.000 claims abstract description 3
- 239000000758 substrate Substances 0.000 claims abstract description 3
- 238000007747 plating Methods 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 2
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 238000010422 painting Methods 0.000 abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 9
- 238000002161 passivation Methods 0.000 description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007591 painting process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009500 colour coating Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000007592 spray painting technique Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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
- 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
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
-
- 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
-
- 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
- C23C2/12—Aluminium or alloys based thereon
-
- 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
- C23C2/261—After-treatment in a gas atmosphere, e.g. inert or reducing atmosphere
-
- 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
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/10—Oxidising
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Thermal Sciences (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention relates to a surface blackened high-aluminum hot dip coating steel plate and a manufacturing method thereof, wherein the coating steel plate is made of Al 2 O 3 ‑ZnO‑SiO 2 The surface mixed oxide layer, the Al-Fe intermetallic compound layer and the steel substrate are formed, wherein the thickness of the surface mixed oxide layer is 1.0-5 mu m; the thickness of the Fe-Al intermetallic compound layer is 15-20 mu m. The invention obtains the surface blackened coated steel plate with good corrosion resistance by carrying out secondary heating treatment on the hot dip coated high aluminum coated steel plate, can be directly used without painting, greatly saves the cost and is beneficial to environmental protection.
Description
Technical Field
The invention relates to the field of hot dipping, in particular to a high-aluminum hot dip coated steel plate with a blackened surface and a manufacturing method thereof.
Background
High-aluminum hot-dip coated steel sheets are widely used in various fields with excellent corrosion resistance, and in the fields of construction, home appliances, etc., color coating treatment or spray painting after molding is often required for corrosion resistance and aesthetic appearance of surfaces. Taking electric control cabinet products as an example, most of high-aluminum hot dip coating steel plates are formed after being taken off line, and then are subjected to paint spraying treatment, namely black paint.
The painting process must consider the binding force condition of the plating surface and paint materials, and the plating surface must be pretreated before painting, so that the cleaning of the plate surface is ensured, otherwise, the binding effect is greatly reduced, and the painting process brings environmental protection pressure.
At present, many passivation technologies develop color passivation, but the passivation film has a relatively quick failure, a porous structure system also limits the corrosion resistance, and meanwhile, the organic passivation is inevitably brought into environmental protection, so that the abrasion of the passivation film in the processing process is unavoidable.
If the blackening reaction can be carried out on the plating layer, the binding force is good, the production cost is greatly reduced, and the environmental protection pressure is overcome.
The invention obtains the blackened high-aluminum series plated steel plate with good corrosion resistance through reprocessing the hot dip plated steel plate strip.
Disclosure of Invention
The invention provides a surface blackened high-aluminum series hot dip coated steel plate and a manufacturing method thereof, wherein the surface blackened coated steel plate with good corrosion resistance is obtained by carrying out secondary heating treatment on the hot dip coated steel plate, the surface blackened coated steel plate can be directly used without painting, the cost is greatly saved, and the environment protection is facilitated.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
a high-aluminum hot dip coating steel plate with blackened surface is prepared from Al 2 O 3 -ZnO-SiO 2 Surface mixed oxygenThe chemical layer, the Al-Fe intermetallic compound layer and the steel substrate, wherein the thickness of the surface mixed oxide layer is 1.0-5 mu m; the thickness of the Fe-Al intermetallic compound layer is 15-20 mu m.
The plating layer comprises the following components in percentage by weight: 20-40 wt% of ZnO; al (Al) 2 O 3 15wt％～30wt％；SiO 2 1.0 to 3.0 weight percent; the balance being Fe-Al intermetallic compounds and unavoidable impurity phases.
A method for manufacturing a high-aluminum hot dip coating steel plate with a blackened surface comprises the steps of carrying out forming processing on the high-aluminum coating steel plate after hot dip coating, and then heating the steel plate in a heating furnace at 620-680 ℃; the heat preservation time is 5-30 min; the humidity in the furnace is less than 10%; the O content is 25at% -35 at%.
And (3) carrying out micro-polishing treatment on the surface of the heated steel plate, wherein the roughness of the polished stone is less than 1.0 mu m, and the surface roughness of the polished plate is 0.5-1.3 mu m.
The hot dip plating bath comprises the following components in percentage by weight: 35-55 wt% of Al; 1.0 to 2.0 weight percent of Si; RE 0.05-0.15 wt%; o3 accounts for 10wt percent, and the balance is Zn and unavoidable impurities.
The thickness of the surface mixed oxide layer is too thin, the blackening degree is not ideal, the corrosion resistance is difficult to ensure, the oxide layer is too thick, the surface chalking phenomenon is serious, the roughness is difficult to control, and the surface brightness is poor.
The blackening effect is difficult to finish due to the fact that the heating temperature is too low, the temperature is too high, an oxide layer is too thick, the chalking phenomenon is serious, surface powder is removed, and the glossiness is poor; the limitation of the heat preservation time is similar to the temperature; the humidity in the furnace is strictly controlled, and the surface corrosion can be caused by the excessively high humidity at high temperature, the glossiness is obviously deteriorated, and even the internal coating is damaged; the surface roughness mainly determines the glossiness of the surface of the plate, and reasonable roughness control can obtain good attractive effect.
Compared with the prior art, the invention has the beneficial effects that:
a surface blackened high-aluminum-based hot dip coated steel sheet and a method for producing the same, wherein a surface blackened coating layer having good corrosion resistance is obtained by subjecting a hot dip coated high-aluminum-based coated steel sheet to a secondary heat treatmentThe steel plate can be directly used without painting, greatly saves the cost and is beneficial to environmental protection. At 120g/m 2 For example, the red rust resistance of the coated steel plate exceeds 5000 hours.
Drawings
Fig. 1 is a schematic view of a surface blackened high-aluminum hot dip coated steel sheet.
Detailed Description
The following is a further description of embodiments of the invention, with reference to the examples:
the plating thickness of the high-aluminum hot dip coating steel plate with the surface blackened in the examples is shown in table 1; example surface blackened high-aluminum series hot dip coating steel plate preparation conditions are shown in table 2; the preparation roughness requirements of the high-aluminum hot dip coating steel plate with the blackened surface of the example are shown in Table 3; the surface layer composition ratio of the example surface blackened high-aluminum hot-dip coating steel plate is shown in Table 4; the content ratio of each element in the surface blackened high-aluminum hot dip coating is shown in table 5; example surface blackening high-aluminum series hot dip coating steel plate red rust salt spray resistant time.
TABLE 1 surface blackened high aluminum series hot dip coating Steel sheet coating thickness
TABLE 2 preparation conditions for high aluminum series hot dip coating steel sheet with blackened surface
Table 3 surface blackened high aluminum series hot dip coating steel sheet preparation roughness requirement
TABLE 4 surface blackened high aluminum hot dip coating Steel sheet surface composition in wt%
TABLE 5 surface blackened high aluminum Hot-dip coating layer content of elements in% by weight
TABLE 6 Red rust resistance salt spray time (120 g/m) of high aluminum series hot dip coating steel sheet surface blackened 2 )
Claims (5)
1. A high-aluminum hot dip coating steel sheet with a blackened surface, characterized in that the coated steel sheet is composed of Al 2 O 3 -ZnO-SiO 2 The surface mixed oxide layer, the Al-Fe intermetallic compound layer and the steel substrate are formed, wherein the thickness of the surface mixed oxide layer is 1.0-5 mu m; the thickness of the Fe-Al intermetallic compound layer is 15-20 mu m.
2. The surface blackened high-alumina hot dip coated steel sheet according to claim 1, wherein the plating layer comprises the following components: 20-40 wt% of ZnO; al (Al) 2 O 3 15wt％～30wt％；SiO 2 1.0 to 3.0 weight percent; the balance being Fe-Al intermetallic compounds and unavoidable impurity phases.
3. A method for producing a surface-blackened high-aluminum-based hot-dip coated steel sheet according to claim 1 or 2, wherein after hot-dip coating, the high-aluminum-based coated steel sheet is subjected to forming and then is heated in a heating furnace at a heating temperature of 620 to 680 ℃; the heat preservation time is 5-30 min; the humidity in the furnace is less than 10%; the O content is 25at% -35 at%.
4. The method for producing a surface-blackened high-aluminum hot-dip coated steel sheet according to claim 3, wherein the surface of the heated steel sheet is polished to a polishing stone roughness of less than 1.0 μm and the polished steel sheet has a surface roughness of 0.5 to 1.3. Mu.m.
5. A surface blackened high-alumina hot-dip plated steel sheet according to claim 3, wherein the hot-dip plating bath comprises the following components: 35-55 wt% of Al; 1.0 to 2.0 weight percent of Si; RE 0.05-0.15 wt%; o3 accounts for 10wt percent, and the balance is Zn and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310914694.9A CN116987997A (en) | 2023-07-25 | 2023-07-25 | Surface blackened high-aluminum hot dip coating steel plate and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310914694.9A CN116987997A (en) | 2023-07-25 | 2023-07-25 | Surface blackened high-aluminum hot dip coating steel plate and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116987997A true CN116987997A (en) | 2023-11-03 |
Family
ID=88525943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310914694.9A Pending CN116987997A (en) | 2023-07-25 | 2023-07-25 | Surface blackened high-aluminum hot dip coating steel plate and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116987997A (en) |
-
2023
- 2023-07-25 CN CN202310914694.9A patent/CN116987997A/en active Pending
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