CN203371861U - High-temperature-resistant anticorrosive aluminum zinc plating steel plate - Google Patents
High-temperature-resistant anticorrosive aluminum zinc plating steel plate Download PDFInfo
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- CN203371861U CN203371861U CN201320439332.0U CN201320439332U CN203371861U CN 203371861 U CN203371861 U CN 203371861U CN 201320439332 U CN201320439332 U CN 201320439332U CN 203371861 U CN203371861 U CN 203371861U
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- resistant anticorrosive
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Abstract
The utility model relates to a high-temperature-resistant anticorrosive aluminum zinc plating steel plate which belongs to the technical field of the steel plate with a coating layer. The steel plate comprises a base plate, a first structure layer, a second structure layer and a passivation layer, wherein the first structure layer is bonded on the base plate; one side surface of the first structure layer faces outside when the first structure layer is in a working state; the second structure layer is bonded on the base plate; one side surface of the second structure layer faces inside when the second structure layer is in the working state; the passivation layer is bonded on the surface of the first structure layer. The steel plate is characterized in that the surface of the passivation layer is bonded with a high-temperature-resistant anticorrosive layer. The surface of the passivation layer is bonded with the high-temperature-resistant anticorrosive layer, so that the steel plate cannot be corroded, cracked, crazed and suffered from other conditions when continuously working for a long time at a high-temperature environment.
Description
Technical field
The utility model belongs to the coating layer steel plate technical field, is specifically related to a kind of fire resistant anticorrosive Al-Zn coated steel, and relates to its preparation method.
Background technology
Due to the atmospheric corrosion resistance ability of Al-Zn coated steel be hot-dip galvanizing sheet steel 2-6 doubly, again because it has the water-fast corrosivity that heat zinc coating plate and hot dip aluminium sheet can not match in excellence or beauty with it, also because it has the heat-resisting oxidation-resistance of standing out from one's fellows, be able under 300 ℃ to use nondiscolouring and still can show good water-fast, anti-soil corrosion ability 500 ℃ of long-term uses in left and right for a long time, thereby be widely used as such as chimney, carry the material of solar heat protection heat shield etc. of pipeline, high temperature stove and accessory, baking box, vehicle vent gas discharging pipe and all kinds of catalysis heat exchangers of high-temperature medium.But, the known Al-Zn coated steel of the before-mentioned products that is not limited to exemplify and occasion that at present widely is used in is when temperature reaches more than 550 ℃, tend to show the phenomenon that steel plate paint film cold-hot replaces the ability fragility, particularly, be prone to quick-fried paint, be full of cracks, thereby affect the quality of product.Here the paint film said refers in fact the side that is combined in respectively substrate and the AlSi coating on opposite side surface, described quick-fried paint be full of cracks refer in fact between pellumina that AlSi coating forms and substrate produce minute de-.
" a kind of high temperature clad steel sheet manufacture method and the high temperature resistant clad steel sheet thereof " that the Chinese invention patent application publication No. is recommended instructed going out the melting plating solution with steel and being transported to equably belt steel surface by conveying device and being combined with the coating in molten condition by one or more nanometer hard particles of filling the post of of pottery, ceramic on metal, metal, intermetallic compound, metal oxide after air knife purges, and forms the superficial layer of the hard nanometer particle (grain diameter is 10-100nm) of one deck distribution after cooling on surface.The positive effect of this patent application scheme is to promote more degree and the toughness of coating, has solved in the prior art to improve coating hardness and take and sacrifice the contradiction of its toughness between cost, sacrifices toughness and increases fragility, thereby cause explosion.Specifically can be referring to the 0004th section and 0010 to 0018 section, the specification of this patent.
Due to above-mentioned patent application for be heat zinc coating plate, again because above-mentioned patent application is that Hardness and toughness for improving coating has both and proposes, also due to what directly the nanometer hard particles is combined with zinc liquid layer in molten condition, in conjunction with effect, be worth discussing, more and due to hot-dip galvanizing sheet steel and be not suitable for the occasion that the applicant exemplifies in the above, etc., so this patent application scheme does not have referential technical meaning for the remarkable fire resistant anticorrosive aspect of improving Al-Zn coated steel.
Certainly, exploitation can show remarkable anticorrosion ability in hot environment under as 100-1000 ℃ and use and meet the Al-Zn coated steel that long time continuous working requires under hot environment and have positive effect, for this reason, the applicant has done positive and useful exploration, and carried out a large amount of experiments, finally formed technical scheme described below.
Summary of the invention
Task of the present utility model be to provide a kind of contribute to embody excellent fire resistant anticorrosive ability and use meet under hot environment long time continuous working and require and be conducive to avoid in use occur such as coating explosion and/or be full of cracks and use the fire resistant anticorrosive Al-Zn coated steel increased the service life.
Task of the present utility model completes like this, a kind of fire resistant anticorrosive Al-Zn coated steel, comprise substrate, be incorporated into substrate side surface outward under the use state the first structure sheaf, be incorporated into substrate under the use state towards the second structure sheaf of an interior side surface be incorporated into the passivation layer on the surface of the first structure sheaf, be characterised in that; Surface conjunction at described passivation layer has the fire resistant anticorrosive layer.
In a specific embodiment of the present utility model, the thickness of described the first structure sheaf and the second structure sheaf is 10-40 μ m.
In another specific embodiment of the present utility model, the trivalent chromium that described passivation layer is thickness 50nm-2 μ m.
In another specific embodiment of the present utility model, the thickness of described fire resistant anticorrosive layer is 20-50 μ m.
In another specific embodiment of the present utility model, described the first structure sheaf and the second structure sheaf are aluminium zinc silicon alloy.
The technical scheme that the utility model provides is because the surface conjunction at passivation layer has the fire resistant anticorrosive layer, thereby has long time continuous working under hot environment and not there will be the effect of corrosion and can not produce the situation of explosion be full of cracks and so on.
The accompanying drawing explanation
Fig. 1 is example structure figure of the present utility model.
The specific embodiment
Embodiment 1:
Ask for an interview Fig. 1, provided a substrate 1, this substrate 1 is cold-rolled steel sheet, in the present embodiment, for the thickness of substrate 1, does not need to be limited, because usually can be according to using object or claiming client's requirement and select flexibly in for 0.1-4.5 ㎜ at thickness.Under substrate 1 use state, a side outward is combined with the first structure sheaf 2 that thickness is 15 μ m, and is combined with towards an interior side surface the second structure sheaf 3 that thickness is 15 μ m under substrate 1 use state.The material of first, second structure sheaf 2,3 is aluminium zinc silicon alloy.Surface conjunction at the first structure sheaf 2 has the passivation layer 4 that thickness is 300nm, and the material of this passivation layer 4 is trivalent chromium.The technical essential of the technical scheme provided as the utility model: the surface conjunction at passivation layer 4 has the fire resistant anticorrosive layer 5 that thickness is 20 μ m.
The fire resistant anticorrosive Al-Zn coated steel obtained by the present embodiment can anti-high temperature more than 850 ℃, be able to work enduringly under the 100-1000 hot environment, and the NaCl(sodium chloride that is 5% through mass percent concentration) 500 hours non-corrosives of neutral salt spray test, do not peel off.
Embodiment 2:
Only change the even thickness of first, second structure sheaf 2,3 into 25 μ m, change the thickness of passivation layer 4 into 1 μ m, change the thickness of fire resistant anticorrosive layer 5 into 35 μ m, all the other are all with the description to embodiment 1.
Embodiment 3:
Only change the even thickness of first, second structure sheaf 2,3 into 40 μ m, change the thickness of passivation layer 4 into 2 μ m, change the thickness of fire resistant anticorrosive layer 5 into 50 μ m, all the other are all with the description to embodiment 1.
Preparation example 1:
The process of the fire resistant anticorrosive Al-Zn coated steel of Preparation Example 1 or title step are as follows:
A) cleaning steel plate, select the cold-rolled steel sheet of surface without the flaw of incrustation, pit and/or micro-crack and so on, and the both side surface to cold-rolled steel sheet is first carried out the disc brush cleaning, carry out again alkali cleaning and electrolytic cleaned, to remove surface oxidation cortex (epithelium) and/or greasy dirt, introduce Drying tunnel after cleaning and dry, obtain substrate 1;
B) apply, adopt dip-coating method that structural material is coated to by steps A) substrate 1 that an obtains the side surface outward and side surface used at this outward forms the first structure sheaf 2 under the use state, and adopt dip-coating method that structural material is coated to substrate 1 uses at this and forms the second structure sheaf 3 towards an interior side surface towards an interior side surface simultaneously under the use state, that is to say, first, the second structure sheaf 2, 3 simultaneously are coated on substrate 1 side surface outward and towards an interior side surface under the use state by dip-coating method, in this preparation example, the thickness of the first structure sheaf 2 and the second structure sheaf 3 is 15 μ m, and the material of the first structure sheaf 2 and the second structure sheaf 3 is aluminium zinc silicon, it is aluminium zinc silicon ternary material, wherein: the mass percent of aluminium is 55%, the mass percent of zinc be 43.5% and the mass percent of silicon be 1.5%, when lifting under state by way of the plating pot, dipping just adheres to substrate 1 side outward and towards an interior side surface under the use state when substrate 1,
C) passivation, the trivalent chromium solutions that is 35g/L using mass concentration with roll coating model is coated to by step B at normal temperatures as passivator) surface of the first structure sheaf 2 of obtaining, and after coating, introduce the dry processing of Drying tunnel after passivation, baking temperature is 60 ℃, be 70s drying time, thereby form and be combined with the passivation layer 4 that thickness is 300nm on the surface of the first structure sheaf 2;
D) fire resistant anticorrosive is processed, with roll coating model, fire resistant anticorrosive paint is coated to by step C) surface of the passivation layer 4 that obtains, then calcine and solidify, the calcining solidification temperature is 200 ℃, calcining hardening time is 55s, obtaining the surface conjunction at passivation layer 4 as shown in Figure 1 has the fire resistant anticorrosive galvanized steel plain sheet of the fire resistant anticorrosive layer 5 that thickness is 20 μ m, wherein: aforementioned fire resistant anticorrosive layer 5 consists of the raw material of following parts by weight: 5 parts of organosilicons, 65 parts of modified organic silicone resins, 5 parts of talcum powder, 6 parts of mica powders, 5 parts, the mixture that trbasic zinc phosphate mixes by weight with zinc molybdate at 1: 1 mutually, 10 parts of n-butanols, 1 part of coupling agent (KH-792), 1 part of 2 parts of silica and caprylate.Aforesaid organosilicon preferably adopt by Guangzhou, Guangdong Province, China city Xiang hawk chemical assistant Co., Ltd, produced and the application before day the trade mark at the market public offering be the XS-A-201 organosilicon; Aforesaid modified organic silicone resin preferably adopt by Chinese Shanghai power reach that chemical industry Co., Ltd produces and before the application proposes the trade mark at the market public offering be CH-II organic siliconresin; Aforesaid caprylate adopt by Jiangsu Province, China Wuxi City Zijin auxiliary chemicals Co., Ltd, produced and before the application proposes the trade mark in market sale be the D3N-HA caprylate.
Preparation example 2:
The process of the fire resistant anticorrosive Al-Zn coated steel of Preparation Example 2 is as follows:
Only by steps A) in cleaning change into the both side surface of cold-rolled steel sheet first carried out to the disc brush cleaning, then carry out pickling and electrolysis is washed; By step B) in the first structure sheaf 2 and the thickness of the second structure sheaf 3 change 25 μ m into, by the mass percent of the aluminium of aluminium zinc silicon ternary material change 57% into, the percentage composition of zinc change into 42% and the mass percent of silicon change 1% into; By step C) in the mass concentration of trivalent chromium solutions change 25g/L into, by baking temperature with change respectively 85 ℃ and 40s drying time into, the thickness of passivation layer 4 is crossed and is changed 1 μ m into; By step D) in calcining heat and calcination time change respectively 220 ℃ and 45s into, change the thickness of fire resistant anticorrosive layer 5 into 35 μ m, the parts by weight that form the raw material of fire resistant anticorrosive layer 5 are changed into: 3 parts of 15 parts of 7 parts, mixture, the n-butanols that 10 parts of organosilicons, 50 parts of modified organic silicone resins, 10 parts of talcum powder, 7 parts of mica powders, trbasic zinc phosphate mix by weight with zinc molybdate at 1: 1 mutually, 2 parts of coupling agents (KH-900), 4 parts of silica and caprylates.All the other are all with the description to preparation example 1.
Preparation example 3:
The process of the fire resistant anticorrosive Al-Zn coated steel of Preparation Example 3 is as follows:
Only by steps A) in cleaning change into the both side surface of cold-rolled steel sheet first carried out to alkali cleaning, then carry out pickling; By step B) in the first structure sheaf, the thickness of the second structure sheaf 2,3 change 40 μ m into, by the mass percent of the aluminium of aluminium zinc silicon ternary material change 53% into, the percentage composition of zinc change into 44.5% and the mass percent of silicon change 2.5% into; By step C) in the mass concentration of trivalent chromium solutions change 30g/L into, by baking temperature with change respectively 70 ℃ and 55s drying time into, the thickness of passivation layer 4 is crossed and is changed 2 μ m into; By step D) in calcining heat and calcination time change respectively 250 ℃ and 25s into, change the thickness of fire resistant anticorrosive layer 5 into 50 μ m, the parts by weight that form the raw material of fire resistant anticorrosive layer 5 are changed into: 2 parts of 5 parts of 3 parts, mixture, the n-butanols that 20 parts of organosilicons, 70 parts of modified organic silicone resins, 3 parts of talcum powder, 15 parts of mica powders, trbasic zinc phosphate mix by weight with zinc molybdate at 1: 1 mutually, 3 parts of coupling agents (KH-792), 3 parts of silica and caprylates.All the other are all with the description to preparation example 1.
Claims (5)
1. a fire resistant anticorrosive Al-Zn coated steel, comprise substrate (1), be incorporated into substrate (1) side surface outward under the use state the first structure sheaf (2), be incorporated into substrate (1) under the use state towards second structure sheaf (3) of an interior side surface be incorporated into the passivation layer (4) on the surface of the first structure sheaf (2), it is characterized in that; Surface conjunction at described passivation layer (4) has fire resistant anticorrosive layer (5).
2. fire resistant anticorrosive Al-Zn coated steel according to claim 1, is characterized in that the thickness of described the first structure sheaf (2) and the second structure sheaf (3) is 10-40 μ m.
3. fire resistant anticorrosive Al-Zn coated steel according to claim 1, is characterized in that described passivation layer (4) is for the trivalent chromium of thickness 50nm-2 μ m.
4. fire resistant anticorrosive Al-Zn coated steel according to claim 1, the thickness that it is characterized in that described fire resistant anticorrosive layer (5) is 20-50 μ m.
5. fire resistant anticorrosive Al-Zn coated steel according to claim 1 and 2, is characterized in that described the first structure sheaf (2) and the second structure sheaf (3) are aluminium zinc silicon alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201320439332.0U CN203371861U (en) | 2013-07-23 | 2013-07-23 | High-temperature-resistant anticorrosive aluminum zinc plating steel plate |
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| CN201320439332.0U CN203371861U (en) | 2013-07-23 | 2013-07-23 | High-temperature-resistant anticorrosive aluminum zinc plating steel plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103350539A (en) * | 2013-07-23 | 2013-10-16 | 江苏克罗德科技有限公司 | High temperature resistant anti-corrosion Al-Zn alloy coated steel sheet and preparation method thereof |
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- 2013-07-23 CN CN201320439332.0U patent/CN203371861U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103350539A (en) * | 2013-07-23 | 2013-10-16 | 江苏克罗德科技有限公司 | High temperature resistant anti-corrosion Al-Zn alloy coated steel sheet and preparation method thereof |
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Effective date of registration: 20161010 Granted publication date: 20140101 |
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Date of cancellation: 20170410 Granted publication date: 20140101 |
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