CN104195615A - Preparation method of corrosion-proof aluminum section - Google Patents
Preparation method of corrosion-proof aluminum section Download PDFInfo
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- CN104195615A CN104195615A CN201410453356.0A CN201410453356A CN104195615A CN 104195615 A CN104195615 A CN 104195615A CN 201410453356 A CN201410453356 A CN 201410453356A CN 104195615 A CN104195615 A CN 104195615A
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Abstract
The invention relates to the field of preparation methods of aluminum sections and provides a preparation method of a corrosion-proof aluminum section which has a good corrosion-proof effect, is high in adhesion power, cannot generate toxic materials and cannot pollute the environment. The preparation method comprises the following steps: degreasing, washing with water, performing anodic oxidation, spraying, and curing, wherein a surface chemical treatment process is carried out after the anodic oxidation process and before the spraying process and comprises the following concrete steps: preparing chemical treatment liquid, soaking the aluminum section subjected to anodic oxidation into the chemical treatment liquid for 3-5 minutes, drying to obtain an aluminum section workpiece with a protection layer, and spraying a corrosion-proof coating onto the aluminum section workpiece with the protection layer under the pressure of 0.05-0.07MPa for 1.0-2.0 minutes.
Description
Technical field
The present invention relates to the preparation method field of aluminium section bar, relate in particular to a kind of preparation method of anticorrosion aluminium section bar.
Background technology
Aluminium alloy extrusions for building is corrosion-resistant owing to requiring, wear-resisting, the over-all properties of the good and height such as long service life grade of decorative appearance, therefore, aluminium section bar is before techniques such as adopting electrostatic powder coating and the coating of fluorocarbon resin paint is carried out surfacecti proteon decoration, must carry out chemical conversion treatment, to improve the bonding force of coating and base material and to meet highly corrosion resistant requirement, China still adopts this method of chromate conversion treatments at present substantially, chromate conversion treatments method need to be used containing chromium chemical substance, seriously polluted to environment, and wastewater treatment expense is high, chromaking liquid poor stability, it is muddy that solution easily becomes, sediment is more, the easy surperficial dust of workpiece, chromaking film erosion resistance is poor, poor adhesive force.Separately have minority to use chromium-free treating liquid to carry out chemical conversion treatment, but these chromium-free treating liquid ubiquities are taking the Tripotassium iron hexacyanide as promotor, the impact that the hexacyanoferrate can be subject to outer light causes resolving into poisonous prussiate.
Summary of the invention
Therefore,, for above content, the invention provides that a kind of anticorrosion effect is good, strong adhesion, can not produce the preparation method of toxic substance, anticorrosion aluminium section bar free from environmental pollution.
For achieving the above object, the present invention is achieved by the following technical solutions: a kind of preparation method of anticorrosion aluminium section bar, comprise degreasing, washing, anodic oxidation, spraying, solidification treatment, after described anodic oxidation, before spraying, also carry out chemical conversion treatment, the concrete technology step of described chemical conversion treatment is: prepare chemical pretreatment solution, to put into chemical pretreatment solution through anodised aluminium section bar workpiece and flood 3～5min, dry, obtain having the aluminium section bar workpiece of protective layer, described chemical pretreatment solution contains: Sodium Fluoride 0.2～0.3g/L, hydrofluoric 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 with protective layer, spray one deck corrosion protection coating, spraying 1.0～2.0min, spray pressure is 0.05～0.07Mpa, and described corrosion protection coating comprises each raw material of following weight part: polyvinylidene difluoride (PVDF) 21～35 weight parts, N,N-DIMETHYLACETAMIDE 80～90 weight parts, NaH
2pO
413～18 weight parts, titanium dioxide 5～10 weight parts, pigment 10～12 weight parts.
Further improve and be: the preparation method of described corrosion protection coating is: by polyvinylidene difluoride (PVDF) 21～35 weight parts, N,N-DIMETHYLACETAMIDE 80～90 weight parts, NaH
2pO
413～18 weight parts, titanium dioxide 5～10 weight parts, pigment 10～12 weight parts mix, and curtain coating is on aluminium section bar workpiece, after 210～300 DEG C of hot melts, cooling rapidly, makes corrosion protection coating.
Further improve and be: described chemical pretreatment solution contains: Sodium Fluoride 0.25g/L, hydrofluoric 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 protection coating comprises each raw material of following weight part: polyvinylidene difluoride (PVDF) 27～35 weight parts, N,N-DIMETHYLACETAMIDE 85～90 weight parts, NaH
2pO
415～18 weight parts, titanium dioxide 8～10 weight parts, pigment 11～12 weight parts.
By adopting aforementioned techniques scheme, the invention has the beneficial effects as follows: the preparation method of anticorrosion aluminium section bar of the present invention, after anodic oxidation, before spraying, also carry out chemical conversion treatment, the concrete technology step of described chemical conversion treatment is: prepare chemical pretreatment solution, to put into chemical pretreatment solution through anodised aluminium section bar workpiece and flood 3～5min, dry, obtain having the aluminium section bar workpiece of protective layer, described chemical pretreatment solution contains: Sodium Fluoride 0.2～0.3g/L, hydrofluoric 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 is not containing chromium, free from environmental pollution, comparatively environmental protection, and dry after chemical pretreatment solution dipping 3～5min, the aluminium section bar workpiece obtaining has layer protective layer, this protective layer has certain anti-anticorrosion ability, then on the aluminium section bar workpiece with protective layer, spray one deck corrosion protection coating, spraying 1.0～2.0min, spray pressure is 0.05～0.07Mpa, and described corrosion protection coating comprises each raw material of following weight part: polyvinylidene difluoride (PVDF) 21～35 weight parts, N,N-DIMETHYLACETAMIDE 80～90 weight parts, NaH
2pO
413～18 weight parts, titanium dioxide 5～10 weight parts, pigment 10～12 weight parts, in described raw material, N,N-DIMETHYLACETAMIDE serves as solvent action, be used for dissolving polyvinylidene difluoride (PVDF), by the aluminium section bar of above processing, there is good preservative effect, strong adhesion, can not produce toxic substance, free from environmental pollution.
Embodiment
Describe embodiments of the present invention in detail below with reference to specific embodiment, to the present invention, how utilisation technology means solve technical problem whereby, and the implementation procedure of reaching technique effect can fully understand and implement according to this.
If do not specialize, the conventional means that the technique means adopting in embodiment is well known to those skilled in the art, the reagent adopting and product are also and can business obtain.Source, the trade(brand)name of agents useful for same and be necessary to list its moiety person all indicated in the time occurring first.
Embodiment mono-
A kind of preparation method of anticorrosion aluminium section bar, comprise degreasing, washing, anodic oxidation, spraying, solidification treatment, after described anodic oxidation, also carry out chemical conversion treatment before spraying, the concrete technology step of described chemical conversion treatment is: prepare chemical pretreatment solution, will put into the aluminium section bar workpiece that chemical pretreatment solution floods 3min, dries, obtains having protective layer through anodised aluminium section bar workpiece, described chemical pretreatment solution contains: Sodium Fluoride 0.2g/L, hydrofluoric acid ammonium 0.4g/L, potassium permanganate 0.1g/L, nitrate 0.1g/L, praseodymium chloride 0.2g/L; Then on the aluminium section bar workpiece with protective layer, spray one deck corrosion protection coating, spraying 1.0min, spray pressure is 0.05Mpa, described corrosion protection coating comprises each raw material of following weight part: polyvinylidene difluoride (PVDF) 21 weight parts, N,N-DIMETHYLACETAMIDE 80 weight parts, NaH
2pO
413 weight parts, titanium dioxide 5 weight parts, pigment 10 weight parts.The preparation method of described corrosion protection coating is: by polyvinylidene difluoride (PVDF) 21 weight parts, N,N-DIMETHYLACETAMIDE 80 weight parts, NaH
2pO
413 weight parts, titanium dioxide 5 weight parts, pigment 10 weight parts mix, and curtain coating is on aluminium section bar workpiece, after 210 DEG C of hot melts, cooling rapidly, makes corrosion protection coating.
Embodiment bis-
A kind of preparation method of anticorrosion aluminium section bar, comprise degreasing, washing, anodic oxidation, spraying, solidification treatment, after described anodic oxidation, also carry out chemical conversion treatment before spraying, the concrete technology step of described chemical conversion treatment is: prepare chemical pretreatment solution, will put into the aluminium section bar workpiece that chemical pretreatment solution floods 4min, dries, obtains having protective layer through anodised aluminium section bar workpiece, described chemical pretreatment solution contains: Sodium Fluoride 0.25g/L, hydrofluoric 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 with protective layer, spray one deck corrosion protection coating; spraying 1.0～2.0min; spray pressure is 0.05～0.07Mpa, and described corrosion protection coating comprises each raw material of following weight part: polyvinylidene difluoride (PVDF) 27 weight parts, N,N-DIMETHYLACETAMIDE 85 weight parts, NaH
2pO
415 weight parts, titanium dioxide 8 weight parts, pigment 11 weight parts.The preparation method of described corrosion protection coating is: polyvinylidene difluoride (PVDF) 27 weight parts, N,N-DIMETHYLACETAMIDE 85 weight parts, NaH
2pO
415 weight parts, titanium dioxide 8 weight parts, pigment 11 weight parts mix, and curtain coating is on aluminium section bar workpiece, after 260 DEG C of hot melts, cooling rapidly, makes corrosion protection coating.
Embodiment tri-
A kind of preparation method of anticorrosion aluminium section bar, comprise degreasing, washing, anodic oxidation, spraying, solidification treatment, after described anodic oxidation, also carry out chemical conversion treatment before spraying, the concrete technology step of described chemical conversion treatment is: prepare chemical pretreatment solution, will put into the aluminium section bar workpiece that chemical pretreatment solution floods 5min, dries, obtains having protective layer through anodised aluminium section bar workpiece, described chemical pretreatment solution contains: Sodium Fluoride 0.3g/L, hydrofluoric acid ammonium 0.6g/L, potassium permanganate 0.15g/L, nitrate 0.13g/L, praseodymium chloride 0.3g/L; Then on the aluminium section bar workpiece with protective layer, spray one deck corrosion protection coating, spraying 2.0min, spray pressure is 0.07Mpa, described corrosion protection coating comprises each raw material of following weight part: polyvinylidene difluoride (PVDF) 35 weight parts, N,N-DIMETHYLACETAMIDE 90 weight parts, NaH
2pO
418 weight parts, titanium dioxide 10 weight parts, pigment 12 weight parts.The preparation method of described corrosion protection coating is: by polyvinylidene difluoride (PVDF) 35 weight parts, N,N-DIMETHYLACETAMIDE 90 weight parts, NaH
2pO
418 weight parts, titanium dioxide 10 weight parts, pigment 12 weight parts mix, and curtain coating is on aluminium section bar workpiece, after 300 DEG C of hot melts, cooling rapidly, makes corrosion protection coating.
The preparation method of anticorrosion aluminium section bar of the present invention, after anodic oxidation, spraying before also carried out chemical conversion treatment, the concrete technology step of described chemical conversion treatment is: prepare chemical pretreatment solution, will put into the aluminium section bar workpiece that chemical pretreatment solution floods 3～5min, dries, obtains having protective layer through anodised aluminium section bar workpiece, described chemical pretreatment solution contains: Sodium Fluoride 0.2～0.3g/L, hydrofluoric 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 is not containing chromium; free from environmental pollution; comparatively environmental protection; and dry after chemical pretreatment solution dipping 3～5min; the aluminium section bar workpiece obtaining has layer protective layer; this protective layer has certain anti-anticorrosion ability; then on the aluminium section bar workpiece with protective layer, spray one deck corrosion protection coating; spraying 1.0～2.0min; spray pressure is 0.05～0.07Mpa, and described corrosion protection coating comprises each raw material of following weight part: polyvinylidene difluoride (PVDF) 21～35 weight parts, N,N-DIMETHYLACETAMIDE 80～90 weight parts, NaH
2pO
413～18 weight parts, titanium dioxide 5～10 weight parts, pigment 10～12 weight parts, in described raw material, N,N-DIMETHYLACETAMIDE serves as solvent action, be used for dissolving polyvinylidene difluoride (PVDF), by the aluminium section bar of above processing, there is good preservative effect, strong adhesion, can not produce toxic substance, free from environmental pollution.
Above record, only, for utilizing the embodiment of this origination techniques content, modification, variation that any those skilled in the art use this creation to do, all belong to the scope of the claims that this creation is advocated, and be not limited to those disclosed embodiments.
Claims (4)
1. the preparation method of an anticorrosion aluminium section bar, comprise degreasing, washing, anodic oxidation, spraying, solidification treatment, it is characterized in that: after described anodic oxidation, before spraying, also carry out chemical conversion treatment, the concrete technology step of described chemical conversion treatment is: prepare chemical pretreatment solution, to put into chemical pretreatment solution through anodised aluminium section bar workpiece and flood 3～5min, dry, obtain having the aluminium section bar workpiece of protective layer, described chemical pretreatment solution contains: Sodium Fluoride 0.2～0.3g/L, hydrofluoric 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 with protective layer, spray one deck corrosion protection coating, spraying 1.0～2.0min, spray pressure is 0.05～0.07Mpa, and described corrosion protection coating comprises each raw material of following weight part: polyvinylidene difluoride (PVDF) 21～35 weight parts, N,N-DIMETHYLACETAMIDE 80～90 weight parts, NaH
2pO
413～18 weight parts, titanium dioxide 5～10 weight parts, pigment 10～12 weight parts.
2. the preparation method of anticorrosion aluminium section bar according to claim 1, is characterized in that: the preparation method of described corrosion protection coating is: by polyvinylidene difluoride (PVDF) 21～35 weight parts, N,N-DIMETHYLACETAMIDE 80～90 weight parts, NaH
2pO
413～18 weight parts, titanium dioxide 5～10 weight parts, pigment 10～12 weight parts mix, and curtain coating is on aluminium section bar workpiece, after 210～300 DEG C of hot melts, cooling rapidly, makes corrosion protection coating.
3. the preparation method of anticorrosion aluminium section bar according to claim 1 and 2, is characterized in that: described chemical pretreatment solution contains: Sodium Fluoride 0.25g/L, hydrofluoric acid ammonium 0.5g/L, potassium permanganate 0.1g/L, nitrate 0.12g/L, praseodymium chloride 0.25g/L.
4. the preparation method of anticorrosion aluminium section bar according to claim 1, is characterized in that: described corrosion protection coating comprises each raw material of following weight part: polyvinylidene difluoride (PVDF) 27～35 weight parts, N,N-DIMETHYLACETAMIDE 85～90 weight parts, NaH
2pO
415～18 weight parts, titanium dioxide 8～10 weight parts, pigment 11～12 weight parts.
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| CN201410453356.0A CN104195615B (en) | 2014-09-09 | 2014-09-09 | A kind of preparation method of anticorrosion aluminium section bar |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107641830A (en) * | 2017-09-30 | 2018-01-30 | 江苏信轮美合金发展有限公司 | A kind of surface treatment method of anti-corrosion aluminium section bar |
| 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 |
| CN109023470A (en) * | 2018-09-25 | 2018-12-18 | 巩义市宏盛稀有金属有限公司 | 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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| CN101845656A (en) * | 2009-11-24 | 2010-09-29 | 福建省闽发铝业股份有限公司 | Surface treatment process for high-gloss aluminum alloy drawing profiles |
| CN103833072A (en) * | 2014-03-20 | 2014-06-04 | 湖州巨力铝型材有限公司 | Method for preparing aluminum titanate with use of sludge generated in treatment of aluminum profile modification wastewater |
| CN103938251A (en) * | 2014-04-02 | 2014-07-23 | 台山市国际交通器材配件有限公司 | Aluminum alloy hub surface anodic oxidation treatment process |
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2014
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Patent Citations (3)
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| CN101845656A (en) * | 2009-11-24 | 2010-09-29 | 福建省闽发铝业股份有限公司 | Surface treatment process for high-gloss aluminum alloy drawing profiles |
| CN103833072A (en) * | 2014-03-20 | 2014-06-04 | 湖州巨力铝型材有限公司 | Method for preparing aluminum titanate with use of sludge generated in treatment of aluminum profile modification wastewater |
| CN103938251A (en) * | 2014-04-02 | 2014-07-23 | 台山市国际交通器材配件有限公司 | Aluminum alloy hub surface anodic oxidation treatment process |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107641830A (en) * | 2017-09-30 | 2018-01-30 | 江苏信轮美合金发展有限公司 | A kind of surface treatment method of anti-corrosion aluminium section bar |
| 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 |
| CN109023470A (en) * | 2018-09-25 | 2018-12-18 | 巩义市宏盛稀有金属有限公司 | 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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| CN104195615B (en) | 2016-08-17 |
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Address after: Nanan City Blue Creek East Town Village 362300 Fujian city of Quanzhou province (a) 11 1-3 layer Applicant after: Fujian Minfa Aluminum Inc. Address before: 362300 Quanzhou, Fujian, Nanan City, South America Comprehensive Development Zone Applicant before: Fujian Minfa Aluminum Inc. |
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