CN104108209A - Waterproof corrosion-resistant color coating steel plate and preparation method thereof - Google Patents
Waterproof corrosion-resistant color coating steel plate and preparation method thereof Download PDFInfo
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- CN104108209A CN104108209A CN201410315914.7A CN201410315914A CN104108209A CN 104108209 A CN104108209 A CN 104108209A CN 201410315914 A CN201410315914 A CN 201410315914A CN 104108209 A CN104108209 A CN 104108209A
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Abstract
The invention discloses a waterproof corrosion-resistant color coating steel plate and a preparation method thereof, belonging to the technical field of a color coating steel plate and preparation thereof. The method comprises the following steps: selecting and cleaning materials to obtain a steel plate matrix; chemically coating one side surface of the steel plate matrix and drying to obtain a plate blank; coating the surface of the chemical coating of the plate blank with a primer coating, and drying and curing; after cooling, coating the surface of the primer coating with a finish paint layer, and drying and curing to obtain a base plate; and coating the surface of the finish paint coating of the base plate with waterproof corrosion-resistant paint, and drying and curing to obtain the waterproof corrosion-resistant color coating steel plate. The waterproof corrosion-resistant color coating steel plate is excellent in waterproof anti-leakage property, weather resistance, chemical corrosion resistance and low-temperature flexibility; the process is simple and short, the adhesion between the waterproof corrosion-resistant layer and the steel plate surface is strong while the strength is excellent, the steel plate is free of peeling and bubbling after being soaked in water for 400h, and after 720h of neutral salt spray test, a transition layer is free of cracking or peeling.
Description
Technical field
The invention belongs to color coating layer steel plate and preparing technical field thereof, be specifically related to the corrosion-resistant color coating layer steel plate of a kind of waterproof, and relate to the preparation method of the corrosion-resistant color coating layer steel plate of this waterproof.
Background technology
Steel plate is a kind of important engineering material, but steel plate is in use because of corrosion reduction of service life or to lose the loss that its use value brings be also quite huge.Particularly, along with the development of modern industry, the appearance in a collection of infant industry field and the construction of many modern projects, to having higher requirement in waterproof decay resistance and the service life of steel.
In recent years, the corrosion-resistant technology of waterproof at home and abroad develops comparatively fast, the waterproof corrosion resistant coating of thereupon releasing is no lack of report in the literature, typical as: Chinese invention patent Granted publication CN1170902C(environmental friendly, anti-corrosive waterproof paint composition), this patent scheme is by according to quantity than being 100: the A component of 20-25 and B component form, wherein: A component is made up of the tung oil addition product 55% of % by weight meter, epoxy resin 15%, acetic acid 20% and the ethyl acetate 10% that molecular weight is 300-500; B component is made up of triacetamide 37.5% and the dibutyl ester 62.5% of % by weight meter, and in the mixture by A, B component, adds the additive Fe of 20-35% weight
2o
3.This coating composition can become fragile gradually after curing of coating, is particularly collided rear easy embrittlement.And for example: CN100383205C(is anticorrosion, waterproof nano industrial coating and preparation method thereof), bi-component formula, the parts by weight of A component are 95-105 part, the parts by weight of B component are 2-8 part, wherein: A component is by film forming matter, pigment, filler, auxiliary agent, composite Nano dispersion liquid and solvent composition, and B component is by nanometer Sb
2o
3with mixed organic solvents composition, according to the instruction of this patent and the purposes of mentioning, if be applied to steel plate, so not only coating step complexity, and antiseptic effect can not reach the requirement of expectation.
Technical information about corrosion-resistant coating layer steel plate can be seen in equally in disclosed Chinese patent literature, for example: CN101435078B recommends to have " non-chrome resin composition, steel plate is carried out to surface-treated method and steel plate ", it is in the Zn of steel plate coating surface coated with resins coating, resinous coat is resin combination layer, and this resin combination layer is soft ammonia ester resin (being 5-95% by weight) and hard ammonia ester resin (being 5-95% by weight).Wherein: soft ammonia ester resin is the polyurethane resin prepared of isoprene vulcabond, adipic acid and polyacid or the polyurethane resin of being prepared by acrylic polyol and polyisocyanates; Hard ammonia ester resin is one of following A, B and C three kinds, A. the polyurethane resin that prepared by PCL polyalcohol or poly-carbon ester ester polyol and vulcabond, B. by 4,4-bis-(w-hydroxyl alkylene oxo) biphenyl and methyl-2, polyurethane resin prepared by 6-bis-isocyanic acid capronates, C. has the polyurethane resin of acetal bonds.This patent scheme can be cashed the technique effect of the 0045th section, its description, but, because the resin of its use is polyurethane resin, though thereby have intensity height and the good strong point of tear-resistant effect, but the relative fragilities such as the adhesive strength mutually bonding with metal surface, density, water-resistance, leakage resistance, adhesive strength, weatherability (hot and cold resistance), low temperature flexibility, chemicals-resistant corrosion and electrical property are its shortcoming.
For above-mentioned prior art, the applicant has done useful exploration and experiment repeatedly, has finally formed technical scheme described below.
Summary of the invention
Top priority of the present invention is to provide a kind of and contributes to significantly to improve water-resistance, leakage resistance, weatherability, chemical resistance and the low temperature flexibility of face coat and use the corrosion-resistant color coating layer steel plate of the waterproof increasing the service life.
Another task of the present invention is to provide the preparation method of the corrosion-resistant color coating layer steel plate of a kind of waterproof, and the method processing step is brief, can ensure that face coat has good density, has excellent adhesive strength with surface of steel plate and can ensure comprehensive embodiment of the described technique effect of the corrosion-resistant color coating layer steel plate of waterproof.
For having embodied top priority of the present invention, technical scheme provided by the invention is: the corrosion-resistant color coating layer steel plate of a kind of waterproof, comprise steel matrix, be positioned at the transition zone of steel matrix side surface outward under use state and be positioned at the surperficial waterproof anti-corrosion layer of transition zone, be characterised in that: form and have immersion coating towards the surface of a side of described transition zone at described steel matrix, described transition zone comprises primer coating and topcoat, primer coating is incorporated into the surface of described immersion coating, and topcoat is incorporated into the surface of primer coating, described waterproof anti-corrosion layer is incorporated into the surface of topcoat, this waterproof anti-corrosion layer is made up of the following raw material of proportioning by weight: fluorocarbon resin 30-50 part, epoxy resin 15-30 part, solvent 12-20 part, filler 5-11 part, pigment 4-11 part, adhesion promoter 3-8 part and defoamer 0.3-1.0 part.
In a specific embodiment of the present invention, the thickness of described steel matrix is 0.5-1.5mm, and described steel matrix is galvanized steel plain sheet or the surperficial Al-Zn coated steel that is coated with aluminium zinc layer that surface is coated with zinc layer.
In another specific embodiment of the present invention, the thickness of described zinc layer is 30-75 μ m; The thickness of described aluminium zinc layer is similarly 30-75 μ m.
In another specific embodiment of the present invention, the thickness of described immersion coating is 5-15 μ m; Described primer coating and topcoat are coloured coating, and the thickness of coloured coating is 15-45 μ m; The thickness of described waterproof anti-corrosion layer is 95-150 μ m.
In another specific embodiment of the present invention, described fluorocarbon resin is water-base fluorocarbon emulsion resin; Described solvent is ethyl acetate or isopropyl alcohol; Described filler is by nanomete talc powder 3-6 part and nano mica powder 2-5 part of proportioning form by weight; Described pigment is iron oxide pigment; Described adhesion promoter is JSC-2308 type adhesion promoter; Described defoamer is composite organic type defoamer.
Also have in a specific embodiment of the present invention, described iron oxide pigment is iron oxide red or iron oxide yellow.
For having embodied another task of the present invention, technical scheme provided by the invention is: the preparation method of the corrosion-resistant color coating layer steel plate of a kind of waterproof, comprises the following steps:
A) select materials and clean, first choosing and surperficial flawless steel plate in one month from the date of manufacture, then to cleaning steel plate, cleaning post-drying, obtaining steel matrix;
B) activation processing, to by steps A) steel matrix that an obtains side surface outward under use state carries out chemistry and applies and use and form immersion coating on the surface of this side, then drying, obtains slab;
C) japanning, first by step B) the surperficial primer coating coating of the immersion coating of the slab that obtains carry out baking and curing, after cooling, apply finish paint enamelled coating on the surface of primer coating again, then baking and curing, obtains having at the surface conjunction of immersion coating the substrate of the transition zone being jointly made up of primer coating and topcoat;
D) waterproof corrosion-resistance treatment, waterproof corrosion resistant coating is coated on by step C) surface of the topcoat of the substrate that obtains and baking and curing and use and form waterproof anti-corrosion layer on the surface of topcoat, obtain the corrosion-resistant color coating layer steel plate of waterproof, described waterproof anti-corrosion layer is made up of the following raw material of proportioning by weight: fluorocarbon resin 30-50 part, epoxy resin 15-30 part, solvent 12-20 part, filler 5-11 part, pigment 4-11 part, adhesion promoter 3-8 part and defoamer 0.3-1 part.
More of the present invention and in a specific embodiment, steps A) described in be any one in following a), b) and c) three kinds of cleaning ways to cleaning steel plate: a) first adopt disc brush to clean, then carry out successively alkali cleaning and electrolytic cleaned; B) first carry out disc brush cleaning, then carry out pickling and electrolytic cleaned; C) first carry out disc brush cleaning, then carry out electrolytic cleaned; The bake out temperature of described cleaning post-drying is 70-90 DEG C, and the gait of march of steel plate is 55-65m/min.
In of the present invention and then a specific embodiment, step B) described in chemistry apply refer to described substrate steel sheet under use state outward one side surface apply hexavalent chromate, form described immersion coating by hexavalent chromate, described dry temperature is 110 DEG C-125 DEG C, and be 5-15s drying time.
Of the present invention again more and in a specific embodiment, step C) described in the temperature of baking and curing be 200-235 DEG C, the time is 35-55s; The temperature of described baking and curing is then 220-250 DEG C, and the time is 42-65s; Step D) described in the temperature of baking and curing be 230-250 DEG C, drying time is 40-65s.
Technical scheme provided by the invention is owing to being combined with successively immersion coating, primer coating, topcoat and waterproof anti-corrosion layer at steel matrix side surface outward under use state, and because the raw material of waterproof anti-corrosion layer is selected and reasonable mixture ratio, especially owing to having adopted fluorocarbon resin and epoxy resin in the formula of waterproof anti-corrosion layer, thereby there is excellent water resistant anti-leakage, weather-proof, chemical resistance and low temperature flexibility; The preparation method who provides has that processing step is brief, waterproof anti-corrosion layer and the strong adhesion of surface of steel plate and the effect of excellent strength, in water, soak 400h without peeling off, without bubble phenomenon, through neutral salt spray test 720h, transition zone is without cracking, without peeling off situation generation.
Brief description of the drawings
Fig. 1 is the example structure figure of the corrosion-resistant color coating layer steel plate of waterproof of the present invention.
Detailed description of the invention
For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more, applicant elaborates the mode with embodiment below, but be not all the restriction to the present invention program to the description of embodiment, any done according to the present invention design only for pro forma but not substantial equivalent transformation all should be considered as technical scheme category of the present invention.
Embodiment 1:
The preparation corrosion-resistant color coating layer steel plate of waterproof as shown in Figure 1 comprises the following steps:
A) select materials and clean, first choosing indefectible i.e. surface, from the date of manufacture surface in month is that 0.5mm and both side surface respectively have the galvanized steel plain sheet that thickness is the zinc coat of 75 μ m without the thickness of the defect such as pit, corrosion, stripping off, galvanized steel plain sheet is first carried out to disc brush cleaning, carry out successively again alkali cleaning and electrolytic cleaned, to remove oxidation cortex and/or the greasy dirt etc. of galvanized steel sheet surface, after cleaning, dry, bake out temperature is 90 DEG C, steel plate gait of march is 65m/min, obtains steel matrix 1;
B) activation processing, to by steps A) steel matrix 1 that an obtains side surface outward under use state carries out chemistry and applies and use and form immersion coating 11 at this side surface, the thickness of this immersion coating 11 is 5 μ m, here the immersion coating 11 said refer to under the aforementioned use state of steel matrix 1 outward one side surface apply hexavalent chromate, form immersion coating 11 by hexavalent chromate, it is dry through 110 DEG C after to apply chemical valence be the hexavalent chromate solution of positive 6 valencys, be 15s drying time, obtains slab;
C) japanning, first by step B) surface of the immersion coating 11 of the slab that obtains is with roll coating model primer coating, after primer coating at 200 DEG C of temperature baking and curing, the time of baking and curing is 55s, thereby forming thickness on the surface of immersion coating 11 is the primer coating 21 of 15 μ m, apply finish paint on the surface of primer coating 21 with roll coating model more after cooling to room temperature, apply the follow-up and baking and curing of finish paint, then the temperature of baking and curing is 220 DEG C, time is 65s, thereby forming thickness on the surface of primer coating 21 is the topcoat 22 of 25 μ m, obtain having at the surface conjunction of immersion coating 11 substrate of the transition zone 2 jointly being formed by primer coating 21 and topcoat 22, in the present embodiment, the aforesaid end, topcoat 21, 22 are coloured coating is the colored end, top coat layer 21, 22,
D) waterproof corrosion-resistance treatment, with roll coating model, waterproof corrosion resistant coating is coated on by step C) surface of the topcoat 22 of the substrate that obtains, and drying to solidify and form thickness on the surface of topcoat 22 be the waterproof anti-corrosion layer 3 of 150 μ m, obtain the corrosion-resistant color coating layer steel plate of waterproof of structure as shown in Figure 1, in this step, the temperature of aforesaid baking and curing is 230 DEG C, the time of baking and curing is 60s, aforesaid waterproof anti-corrosion layer 3 is made up of the raw material of following parts by weight: 30 parts of water-base fluorocarbon emulsion resins, 15 parts of epoxy resin, 12 parts, ethyl acetate, 6 parts of nanomete talc powders, 5 parts, nano mica powder, 5 parts of iron oxide reds, 0.6 part of 8 parts of adhesion promoters and defoamer, adhesion promoter preferably but not be definitely limited to use by Zhejiang Province, China province Hangzhou Jesse block Chemical Co., Ltd. present patent application propose before be that JSC-2308(is JSC-2308 type at the trade mark of market sale) adhesion promoter, defoamer preferably but not be definitely limited to and use to block Chemical Co., Ltd. be PRS-6D at the trade mark of market sale before present patent application the proposes composite organic type defoamer by Zhejiang Province, China province Hangzhou Jesse.
Embodiment 2:
Only by steps A) in galvanized steel plain sheet to change thickness into be 1.0mm and make the zinc layer of both side surface into Al-Zn coated steel that thickness is the aluminum-zinc alloy layer of 75 μ m, cleaning way makes into: first carry out disc brush cleaning, carrying out pickling and electrolysis washes again, bake out temperature after cleaning changes 80 DEG C into, and steel plate gait of march changes 55m/min into; By step B) in the thickness of immersion coating 11 change 10 μ m into, the baking temperature applying after Cr VI solution changes 115 DEG C into, changes 11s drying time into; By step C) in the thickness of primer coating 21 change 30 μ m into, baking and curing temperature and time after primer coating changes respectively 210 DEG C and 46s into, change the thickness of topcoat 22 into 45 μ m, the temperature and time that applies the baking and curing then after finish paint changes respectively 230 DEG C and 54s into; By step D) in the thickness of waterproof anti-corrosion layer 3 change 125 μ m into, change respectively the temperature and time of baking and curing into 240 DEG C and 50s, and waterproof anti-corrosion layer 3 is changed into by the raw material of following parts by weight and being formed: 1 part of 42 parts of water-base fluorocarbon emulsion resins, 30 parts of epoxy resin, 20 parts of isopropyl alcohols, 3 parts of nanomete talc powders, 2 parts, nano mica powder, 11 parts of iron oxide yellows, 6 parts of adhesion promoters and defoamer.All the other are all with the description to embodiment 1.
Embodiment 3:
Only by steps A) in the thickness of galvanized steel plain sheet change 1.5mm into, the thickness of zinc coat changes 30 μ m into, cleaning way makes into: first carry out disc brush cleaning, then carry out electrolytic cleaned, the bake out temperature after cleaning changes 70 DEG C into, and steel plate gait of march is 60m/min; By step B) in the thickness of immersion coating 11 change 15 μ m into, the baking temperature applying after Cr VI solution changes 125 DEG C into, changes 5s drying time into; By step C) in the thickness of primer coating 21 change 45 μ m into, baking and curing temperature and time after primer coating changes respectively 235 DEG C and 35s into, change the thickness of topcoat 22 into 15 μ m, the temperature and time that applies the baking and curing then after finish paint changes respectively 250 DEG C and 42s into; By step D) in the thickness of waterproof anti-corrosion layer 3 change 95 μ m into, change respectively the temperature and time of baking and curing into 250 DEG C and 42s, wherein: 50 parts of water-base fluorocarbon emulsion resins, 22 parts of epoxy resin, 16 parts, ethyl acetate, 4.5 parts of nanomete talc powders, 3.5 parts, nano mica powder, 0.3 part of 7 parts of iron oxide yellows, 3 parts of adhesion promoters and defoamer.All the other are all with the description to embodiment 1.
Embodiment 4:
Only by steps A) the thickness of aluminum-zinc alloy layer of both side surface of Al-Zn coated steel change 30 μ m into, all the other are all with the description to embodiment 2.
Claims (10)
1. the corrosion-resistant color coating layer steel plate of waterproof, comprise steel matrix (1), be positioned at the transition zone (2) of steel matrix (1) side surface outward under use state and be positioned at the surperficial waterproof anti-corrosion layer (3) of transition zone (2), it is characterized in that: form and have immersion coating (11) towards the surface of a side of described transition zone (2) at described steel matrix (1), described transition zone (2) comprises primer coating (21) and topcoat (22), primer coating (21) is incorporated into the surface of described immersion coating (11), and topcoat (22) is incorporated into the surface of primer coating (21), described waterproof anti-corrosion layer (3) is incorporated into the surface of topcoat (22), this waterproof anti-corrosion layer (3) is made up of the following raw material of proportioning by weight: fluorocarbon resin 30-50 part, epoxy resin 15-30 part, solvent 12-20 part, filler 5-11 part, pigment 4-11 part, adhesion promoter 3-8 part and defoamer 0.3-1.0 part.
2. the corrosion-resistant color coating layer steel plate of waterproof according to claim 1, the thickness that it is characterized in that described steel matrix (1) is 0.5-1.5mm, and described steel matrix (1) is surperficial galvanized steel plain sheet or the surperficial Al-Zn coated steel that is coated with aluminium zinc layer that is coated with zinc layer.
3. the corrosion-resistant color coating layer steel plate of waterproof according to claim 2, the thickness that it is characterized in that described zinc layer is 30-75 μ m; The thickness of described aluminium zinc layer is similarly 30-75 μ m.
4. the corrosion-resistant color coating layer steel plate of waterproof according to claim 1, the thickness that it is characterized in that described immersion coating (11) is 5-15 μ m; Described primer coating (21) and topcoat (22) are coloured coating, and the thickness of coloured coating is 15-45 μ m; The thickness of described waterproof anti-corrosion layer (3) is 95-150 μ m.
5. the corrosion-resistant color coating layer steel plate of waterproof according to claim 1, is characterized in that described fluorocarbon resin is water-base fluorocarbon emulsion resin; Described solvent is ethyl acetate or isopropyl alcohol; Described filler is by nanomete talc powder 3-6 part and nano mica powder 2-5 part of proportioning form by weight; Described pigment is iron oxide pigment; Described adhesion promoter is JSC-2308 type adhesion promoter; Described defoamer is composite organic type defoamer.
6. the corrosion-resistant color coating layer steel plate of waterproof according to claim 5, is characterized in that described iron oxide pigment is iron oxide red or iron oxide yellow.
7. a preparation method for the corrosion-resistant color coating layer steel plate of waterproof as claimed in claim 1, is characterized in that comprising the following steps:
A) select materials and clean, first choosing and surperficial flawless steel plate in one month from the date of manufacture, then to cleaning steel plate, cleaning post-drying, obtaining steel matrix (1);
B) activation processing, to by steps A) steel matrix (1) that an obtains side surface outward under use state carries out chemistry and applies and use and form immersion coating (11) on the surface of this side, then drying, obtains slab;
C) japanning, first by step B) the surperficial primer coating coating (21) of the immersion coating (11) of the slab that obtains carry out baking and curing, after cooling, apply finish paint enamelled coating (22) on the surface of primer coating (21) again, then baking and curing, obtains there is the substrate by primer coating (21) and the common transition zone (2) forming of topcoat (22) at the surface conjunction of immersion coating (11);
D) waterproof corrosion-resistance treatment, waterproof corrosion resistant coating is coated on by step C) surface of the topcoat (22) of the substrate that obtains and baking and curing and use and form waterproof anti-corrosion layer (3) on the surface of topcoat (22), obtain the corrosion-resistant color coating layer steel plate of waterproof, described waterproof anti-corrosion layer (3) is made up of the following raw material of proportioning by weight: fluorocarbon resin 30-50 part, epoxy resin 15-30 part, solvent 12-20 part, filler 5-11 part, pigment 4-11 part, adhesion promoter 3-8 part and defoamer 0.3-1 part.
8. the preparation method of the corrosion-resistant color coating layer steel plate of waterproof according to claim 7, it is characterized in that steps A) described in be any one in following a), b) and c) three kinds of cleaning ways to cleaning steel plate: a) first adopt disc brush to clean, then carry out successively alkali cleaning and electrolytic cleaned; B) first carry out disc brush cleaning, then carry out pickling and electrolytic cleaned; C) first carry out disc brush cleaning, then carry out electrolytic cleaned; The bake out temperature of described cleaning post-drying is 70-90 DEG C, and the gait of march of steel plate is 55-65m/min.
9. the preparation method of the corrosion-resistant color coating layer steel plate of waterproof according to claim 7, it is characterized in that step B) described in chemistry apply refer to described substrate steel sheet (1) under use state outward one side surface apply hexavalent chromate, form described immersion coating (11) by hexavalent chromate, described dry temperature is 110 DEG C-125 DEG C, and be 5-15s drying time.
10. the preparation method of the corrosion-resistant color coating layer steel plate of waterproof according to claim 7, is characterized in that step C) described in the temperature of baking and curing be 200-235 DEG C, the time is 35-55s; The temperature of described baking and curing is then 220-250 DEG C, and the time is 42-65s; Step D) described in the temperature of baking and curing be 230-250 DEG C, drying time is 40-65s.
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| CN201410315914.7A CN104108209A (en) | 2014-07-04 | 2014-07-04 | Waterproof corrosion-resistant color coating steel plate and preparation method thereof |
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| CN201410315914.7A CN104108209A (en) | 2014-07-04 | 2014-07-04 | Waterproof corrosion-resistant color coating steel plate and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106085035A (en) * | 2016-08-19 | 2016-11-09 | 苏州禾盛新型材料股份有限公司 | The composite coloured coated steel sheet of PCM |
| CN106113799A (en) * | 2016-08-19 | 2016-11-16 | 苏州禾盛新型材料股份有限公司 | The composite coloured coated steel sheet of two-sided PCM |
| CN110684406A (en) * | 2019-10-31 | 2020-01-14 | 湖南盛业土工材料制造有限公司 | Manufacturing process of corrosion-resistant waterproof board |
| CN113777013A (en) * | 2021-06-23 | 2021-12-10 | 武汉钢铁有限公司 | Corrosion resistance test sample piece and method for testing corrosion resistance of zinc-aluminum-magnesium coated steel |
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| CN1887993A (en) * | 2006-07-12 | 2007-01-03 | 山东省科学院新材料研究所 | Anticorrosive pipeline paint and its prepn |
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| CN102888968A (en) * | 2012-10-25 | 2013-01-23 | 常熟华冶薄板有限公司 | Noctilucent color coated layer steel plate and manufacturing method thereof |
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| JPS648033A (en) * | 1986-03-27 | 1989-01-12 | Nippon Kokan Kk | High corrosion resistant surface treated steel plate |
| US5147729A (en) * | 1989-03-31 | 1992-09-15 | Kawasaki Steel Corporation | Steel plate with organic coating having improved corrosion resistance in as-worked state |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106085035A (en) * | 2016-08-19 | 2016-11-09 | 苏州禾盛新型材料股份有限公司 | The composite coloured coated steel sheet of PCM |
| CN106113799A (en) * | 2016-08-19 | 2016-11-16 | 苏州禾盛新型材料股份有限公司 | The composite coloured coated steel sheet of two-sided PCM |
| CN110684406A (en) * | 2019-10-31 | 2020-01-14 | 湖南盛业土工材料制造有限公司 | Manufacturing process of corrosion-resistant waterproof board |
| CN113777013A (en) * | 2021-06-23 | 2021-12-10 | 武汉钢铁有限公司 | Corrosion resistance test sample piece and method for testing corrosion resistance of zinc-aluminum-magnesium coated steel |
| CN113777013B (en) * | 2021-06-23 | 2023-11-21 | 武汉钢铁有限公司 | Corrosion resistance test sample and method for testing corrosion resistance of zinc-aluminum-magnesium coated steel |
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Application publication date: 20141022 |