CN104195615B - A kind of preparation method of anticorrosion aluminium section bar - Google Patents
A kind of preparation method of anticorrosion aluminium section bar Download PDFInfo
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- CN104195615B CN104195615B CN201410453356.0A CN201410453356A CN104195615B CN 104195615 B CN104195615 B CN 104195615B CN 201410453356 A CN201410453356 A CN 201410453356A CN 104195615 B CN104195615 B CN 104195615B
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Abstract
The present invention relates to the preparation method field of aluminium section bar, there is provided a kind of anticorrosion effect good, adhesive force is strong, noxious substance will not be produced, the preparation method of anticorrosion aluminium section bar free from environmental pollution, including defat, washing, anodic oxidation, spraying, cured, after described anodic oxidation, chemical surface treatment is also carried out before spraying, the concrete technology step of described chemical surface treatment is: prepare chemical pretreatment solution, to put into through anodised aluminium section bar workpiece and chemical pretreatment solution will impregnate 3～5min, dry, obtain the aluminium section bar workpiece with protective layer, then on the aluminium section bar workpiece have protective layer, spray one layer of corrosion-inhibiting coating, spraying 1.0～2.0min, spray pressure is 0.05～0.07Mpa.
Description
Technical field
The present invention relates to the preparation method field of aluminium section bar, particularly relate to the preparation method of a kind of anticorrosion aluminium section bar.
Background technology
Aluminium alloy extrusions for building is corrosion-resistant owing to requiring, wear-resisting, decorative appearance is good and the combination property of height such as length grade in service life, therefore, aluminium section bar is before using the technique such as electrostatic powder coating and fluorocarbon resin paint coating to carry out surfacecti proteon decoration, chemical surface treatment must be carried out, to improve the adhesion of coating and base material and to meet highly corrosion resistant requirement, China the most substantially or uses this method of chromate conversion treatments, chromate conversion treatments method needs to use containing chromium chemical substance, seriously polluted to environment, and waste water processing cost is high, chromaking liquid poor stability, solution easily becomes cloudy, sediment is more, workpiece easy surface dust, chromaking film corrosion resistance is poor, poor adhesive force.Separately having minority to use chromium-free treating liquid to carry out chemical surface treatment, but these chromium-free treating liquids generally exist with the potassium ferricyanide as accelerator, the iron cyanide can be affected by outer light to be caused resolving into poisonous cyanide.
Summary of the invention
Therefore, for above content, the present invention provides that a kind of anticorrosion effect is good, adhesive force strong, will not produce noxious substance, the preparation method of anticorrosion aluminium section bar free from environmental pollution.
For reaching above-mentioned purpose, the present invention is achieved by the following technical solutions: the preparation method of a kind of anticorrosion aluminium section bar, including defat, washing, anodic oxidation, spraying, cured, after described anodic oxidation, chemical surface treatment is also carried out before spraying, the concrete technology step of described chemical surface treatment is: prepare chemical pretreatment solution, to put into through anodised aluminium section bar workpiece and chemical pretreatment solution will impregnate 3～5min, dry, obtain the aluminium section bar workpiece with protective layer, described chemical pretreatment solution contains: sodium fluoride 0.2～0.3g/L, Fluohydric acid. ammonium 0.4～0.6g/L, potassium permanganate 0.1～0.15g/L, nitrate 0.1～0.13g/L, praseodymium chloride 0.2～0.3g/L；Then on the aluminium section bar workpiece have protective layer, spray one layer of corrosion-inhibiting coating; spraying 1.0～2.0min; spray pressure is 0.05～0.07MPa, and described corrosion-inhibiting coating includes each raw material of following weight portion: Kynoar 21～35 weight portion, dimethyl acetylamide 80～90 weight portion, NaH2PO413～18 weight portions, titanium dioxide 5～10 weight portion, pigment 10～12 weight portion.
Further improve and be: the preparation method of described corrosion-inhibiting coating is: by Kynoar 21～35 weight portion, dimethyl acetylamide 80～90 weight portion, NaH2PO413～18 weight portions, titanium dioxide 5～10 weight portion, pigment 10～12 weight portion mix, and curtain coating, on aluminium section bar workpiece, after 210～300 DEG C of hot melts, cools down rapidly, i.e. prepares corrosion-inhibiting coating.
Further improve and be: described chemical pretreatment solution contains: sodium fluoride 0.25g/L, Fluohydric acid. ammonium 0.5g/L, potassium permanganate 0.1g/L, nitrate 0.12g/L, praseodymium chloride 0.25g/L.
Further improve and be: described corrosion-inhibiting coating includes each raw material of following weight portion: Kynoar 27～35 weight portion, dimethyl acetylamide 85～90 weight portion, NaH2PO415～18 weight portions, titanium dioxide 8～10 weight portion, pigment 11～12 weight portion.
By using preceding solution, the invention has the beneficial effects as follows: the preparation method of the anticorrosion aluminium section bar of the present invention, after the anodic oxidation, chemical surface treatment has also been carried out before spraying, the concrete technology step of described chemical surface treatment is: prepare chemical pretreatment solution, to put into through anodised aluminium section bar workpiece and chemical pretreatment solution will impregnate 3～5min, dry, obtain the aluminium section bar workpiece with protective layer, described chemical pretreatment solution contains: sodium fluoride 0.2～0.3g/L, Fluohydric acid. ammonium 0.4～0.6g/L, potassium permanganate 0.1～0.15g/L, nitrate 0.1～0.13g/L, praseodymium chloride 0.2～0.3g/L；Described chemical pretreatment solution does not contains chromium; free from environmental pollution; more environmental protection; and dry after chemical pretreatment solution dipping 3～5min; the aluminium section bar workpiece obtained has layer protective layer; this protective layer has certain anticorrosion ability; then on the aluminium section bar workpiece have protective layer, spray one layer of corrosion-inhibiting coating; spraying 1.0～2.0min; spray pressure is 0.05～0.07MPa, and described corrosion-inhibiting coating includes each raw material of following weight portion: Kynoar 21～35 weight portion, dimethyl acetylamide 80～90 weight portion, NaH2PO413～18 weight portions, titanium dioxide 5～10 weight portion, pigment 10～12 weight portion, in described raw material, dimethyl acetylamide serves as solvent action, for dissolving Kynoar, by the above aluminium section bar processed, there is preferable antiseptic effect, adhesive force is strong, will not produce noxious substance, free from environmental pollution.
Detailed description of the invention
Describing embodiments of the present invention in detail below with reference to specific embodiment, to the present invention, how application technology means solve technical problem whereby, and the process that realizes reaching technique effect can fully understand and implement according to this.
If not specializing, the conventional means that the technological means employed in embodiment is well known to those skilled in the art, the reagent used and product are also available commercial.The source of agents useful for same, trade name and be necessary to list its constituent person, all indicate when occurring first.
Embodiment one
A kind of preparation method of anticorrosion aluminium section bar; including defat, washing, anodic oxidation, spraying, cured; after described anodic oxidation, before spraying, also carry out chemical surface treatment; the concrete technology step of described chemical surface treatment is: preparing chemical pretreatment solution, will put into the aluminium section bar workpiece impregnating 3min in chemical pretreatment solution, drying, obtain having protective layer through anodised aluminium section bar workpiece, described chemical pretreatment solution contains: sodium fluoride 0.2g/L, Fluohydric acid. ammonium 0.4g/L, potassium permanganate 0.1g/L, nitrate 0.1g/L, praseodymium chloride 0.2g/L；Then spraying one layer of corrosion-inhibiting coating on the aluminium section bar workpiece have protective layer, spray 1.0min, spray pressure is 0.05MPa, and described corrosion-inhibiting coating includes each raw material of following weight portion: Kynoar 21 weight portion, dimethyl acetylamide 80 weight portion, NaH2PO413 weight portions, titanium dioxide 5 weight portion, pigment 10 weight portion.The preparation method of described corrosion-inhibiting coating is: by Kynoar 21 weight portion, dimethyl acetylamide 80 weight portion, NaH2PO413 weight portions, titanium dioxide 5 weight portion, pigment 10 weight portion mix, and curtain coating, on aluminium section bar workpiece, after 210 DEG C of hot melts, cools down rapidly, i.e. prepares corrosion-inhibiting coating.
Embodiment two
A kind of preparation method of anticorrosion aluminium section bar; including defat, washing, anodic oxidation, spraying, cured; after described anodic oxidation, before spraying, also carry out chemical surface treatment; the concrete technology step of described chemical surface treatment is: preparing chemical pretreatment solution, will put into the aluminium section bar workpiece impregnating 4min in chemical pretreatment solution, drying, obtain having protective layer through anodised aluminium section bar workpiece, described chemical pretreatment solution contains: sodium fluoride 0.25g/L, Fluohydric acid. ammonium 0.5g/L, potassium permanganate 0.1g/L, nitrate 0.12g/L, praseodymium chloride 0.25g/L；Then on the aluminium section bar workpiece have protective layer, spray one layer of corrosion-inhibiting coating; spraying 1.0～2.0min; spray pressure is 0.05～0.07MPa, and described corrosion-inhibiting coating includes each raw material of following weight portion: Kynoar 27 weight portion, dimethyl acetylamide 85 weight portion, NaH2PO415 weight portions, titanium dioxide 8 weight portion, pigment 11 weight portion.The preparation method of described corrosion-inhibiting coating is: Kynoar 27 weight portion, dimethyl acetylamide 85 weight portion, NaH2PO415 weight portions, titanium dioxide 8 weight portion, pigment 11 weight portion mix, and curtain coating, on aluminium section bar workpiece, after 260 DEG C of hot melts, cools down rapidly, i.e. prepares corrosion-inhibiting coating.
Embodiment three
A kind of preparation method of anticorrosion aluminium section bar; including defat, washing, anodic oxidation, spraying, cured; after described anodic oxidation, before spraying, also carry out chemical surface treatment; the concrete technology step of described chemical surface treatment is: preparing chemical pretreatment solution, will put into the aluminium section bar workpiece impregnating 5min in chemical pretreatment solution, drying, obtain having protective layer through anodised aluminium section bar workpiece, described chemical pretreatment solution contains: sodium fluoride 0.3g/L, Fluohydric acid. ammonium 0.6g/L, potassium permanganate 0.15g/L, nitrate 0.13g/L, praseodymium chloride 0.3g/L；Then spraying one layer of corrosion-inhibiting coating on the aluminium section bar workpiece have protective layer, spray 2.0min, spray pressure is 0.07MPa, and described corrosion-inhibiting coating includes each raw material of following weight portion: Kynoar 35 weight portion, dimethyl acetylamide 90 weight portion, NaH2PO418 weight portions, titanium dioxide 10 weight portion, pigment 12 weight portion.The preparation method of described corrosion-inhibiting coating is: by Kynoar 35 weight portion, dimethyl acetylamide 90 weight portion, NaH2PO418 weight portions, titanium dioxide 10 weight portion, pigment 12 weight portion mix, and curtain coating, on aluminium section bar workpiece, after 300 DEG C of hot melts, cools down rapidly, i.e. prepares corrosion-inhibiting coating.
The preparation method of the anticorrosion aluminium section bar of the present invention; after the anodic oxidation, chemical surface treatment has also been carried out before spraying; the concrete technology step of described chemical surface treatment is: preparing chemical pretreatment solution, will put into dipping 3～5min in chemical pretreatment solution through anodised aluminium section bar workpiece, dry, obtain having the aluminium section bar workpiece of protective layer, described chemical pretreatment solution contains: sodium fluoride 0.2～0.3g/L, Fluohydric acid. ammonium 0.4～0.6g/L, potassium permanganate 0.1～0.15g/L, nitrate 0.1～0.13g/L, praseodymium chloride 0.2～0.3g/L；Described chemical pretreatment solution does not contains chromium; free from environmental pollution; more environmental protection; and dry after chemical pretreatment solution dipping 3～5min; the aluminium section bar workpiece obtained has layer protective layer; this protective layer has certain anticorrosion ability; then on the aluminium section bar workpiece have protective layer, spray one layer of corrosion-inhibiting coating; spraying 1.0～2.0min; spray pressure is 0.05～0.07MPa, and described corrosion-inhibiting coating includes each raw material of following weight portion: Kynoar 21～35 weight portion, dimethyl acetylamide 80～90 weight portion, NaH2PO413～18 weight portions, titanium dioxide 5～10 weight portion, pigment 10～12 weight portion, in described raw material, dimethyl acetylamide serves as solvent action, for dissolving Kynoar, by the above aluminium section bar processed, there is preferable antiseptic effect, adhesive force is strong, will not produce noxious substance, free from environmental pollution.
Described above, only utilize modification, change that the embodiment of this origination techniques content, any those skilled in the art use this creation to be done, all belong to the scope of the claims of this creation opinion, and be not limited to those disclosed embodiments.
Claims (3)
1. the preparation method of an anticorrosion aluminium section bar, including defat, washing, anodic oxidation, spraying, cured, it is characterized in that: after described anodic oxidation, chemical surface treatment is also carried out before spraying, the concrete technology step of described chemical surface treatment is: prepare chemical pretreatment solution, to put into through anodised aluminium section bar workpiece and chemical pretreatment solution will impregnate 3～5min, dry, obtain the aluminium section bar workpiece with protective layer, described chemical pretreatment solution contains: sodium fluoride 0.2～0.3g/L, Fluohydric acid. ammonium 0.4～0.6g/L, potassium permanganate 0.1～0.15g/L, nitrate 0.1～0.13g/L, praseodymium chloride 0.2～0.3g/L；Then on the aluminium section bar workpiece have protective layer, spray one layer of corrosion-inhibiting coating; spraying 1.0～2.0min; spray pressure is 0.05～0.07MPa, and described corrosion-inhibiting coating includes each raw material of following weight portion: Kynoar 21～35 weight portion, dimethyl acetylamide 80～90 weight portion, NaH2PO413～18 weight portions, titanium dioxide 5～10 weight portion, pigment 10～12 weight portion.
The preparation method of anticorrosion aluminium section bar the most according to claim 1, it is characterised in that: described chemical pretreatment solution contains: sodium fluoride 0.25g/L, Fluohydric acid. ammonium 0.5g/L, potassium permanganate 0.1g/L, nitrate 0.12g/L, praseodymium chloride 0.25g/L.
The preparation method of anticorrosion aluminium section bar the most according to claim 1, it is characterised in that: described corrosion-inhibiting coating includes each raw material of following weight portion: Kynoar 27～35 weight portion, dimethyl acetylamide 85～90 weight portion, NaH2PO415～18 weight portions, titanium dioxide 8～10 weight portion, pigment 11～12 weight portion.
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| CN104959296A (en) * | 2015-06-13 | 2015-10-07 | 余姚市婉珍五金厂 | Surface spray process for aluminium alloy sections |
| CN105671616A (en) * | 2016-03-16 | 2016-06-15 | 浙江鸿昌铝业有限公司 | Anticorrosive treatment technology for surface of aluminum profile |
| CN107641830B (en) * | 2017-09-30 | 2019-06-21 | 江苏信轮美合金发展有限公司 | A kind of surface treatment method of anti-corrosion aluminum profile |
| CN107937954A (en) * | 2017-11-07 | 2018-04-20 | 广东永利坚铝业有限公司 | A kind of environment-friendlyaluminium aluminium section bar processing technology |
| CN108034978A (en) * | 2017-12-14 | 2018-05-15 | 马鞍山新徽铝业有限公司 | A kind of processing method for lifting aluminum alloy materials corrosion resistant characteristic |
| CN109023470B (en) * | 2018-09-25 | 2019-09-27 | 福建省富达精密科技有限公司 | The modified aluminium alloy extrusions of a kind of aluminium alloy section surface differential arc oxidation method of modifying and surface |
| CN110644030A (en) * | 2019-09-20 | 2020-01-03 | 成都阳光铝制品有限公司 | Preparation method of anticorrosive aluminum profile |
| CN114318466A (en) * | 2021-12-15 | 2022-04-12 | 成都阳光铝制品有限公司 | Preparation method of anticorrosive aluminum profile |
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| CN101845656B (en) * | 2009-11-24 | 2013-03-13 | 福建省闽发铝业股份有限公司 | Surface treatment process for high-gloss aluminum alloy drawing profiles |
| CN103833072B (en) * | 2014-03-20 | 2016-06-29 | 湖州巨力铝型材有限公司 | Utilize the method that the mud that the modified wastewater treatment of aluminium section bar produces prepares aluminium titanates |
| CN103938251B (en) * | 2014-04-02 | 2017-01-18 | 广东迪生力汽配股份有限公司 | Aluminum alloy hub surface anodic oxidation treatment process |
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