CN101990582A - 改善有机罩面漆与铝元件粘合的方法和系统 - Google Patents
改善有机罩面漆与铝元件粘合的方法和系统 Download PDFInfo
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Abstract
描述的是一种改善涂覆在铝部件上的有机罩面漆的粘合性的铝部件表面处理方法。该方法包括清洗(14)铝部件、对铝部件脱氧(16)、将转化型涂料涂覆(18)在部件上和在热去离子水中漂洗(20)部件。
Description
发明背景
本发明领域一般地涉及油漆粘合,以及更具体地,涉及改善有机罩面漆与铝元件粘合的方法和系统。
涂有油漆的铝部件经常被用于飞机和其他机动交通工具。然而,这些涂有油漆的铝部件经常遭受油漆粘合失败。这种油漆粘合失败的至少部分原因可能是由于表面处理过程或者有机罩面漆引起,所述表面处理过程通常用于制备进行底漆和油漆涂覆循环的铝。
阳极化是一种用来为油漆涂覆和油漆粘合提供制备更加适当的表面的过程。但是,对一组件中的许多琐碎零件加入阳极化步骤的转化方法增加了费用,因为阳极化是相对昂贵的表面处理过程。然而,以及如上所述,当适当地密封或者在不密封条件中,认为阳极化提供了非常适合于有机罩面漆系统(例如,底漆和面漆)的良好粘合的表面状态。
阳极化并非没有缺点。首先,阳极化是一个比其他已知的表面制备技术更加昂贵的过程,并且阳极化比其他已知的表面制备技术产生更多量的危险废弃物并消耗更多量的能量。此外,阳极化对基底金属的疲劳寿命有有害影响。
在生产环境中,需要考虑的一个单独问题是改变工艺文件需要的时间量。文件改变是一种开支,并且当工艺改变要执行时,这种开支可能是显著的。一般地,对于一个要经历工艺改变文件的开支的实体,有必要显著减少生产成本和/或在所生产产品的质量上不止有递增改变。
发明概述
一方面,提供一种改善涂覆在铝部件上的有机罩面漆的粘合性的铝部件表面处理方法。该方法包括清洗铝部件、对铝部件脱氧、对部件涂覆转化型涂料和在热去离子水中漂洗部件。
另一方面,提供一种铝元件,其具有表面,该表面经过处理以改善涂覆在所述铝元件上的有机罩面漆的粘合性。该表面通过清洗过程、脱氧过程、低铬转化涂布过程,以及热去离子水漂洗过程处理。
附图简述
图1是阐明铝的表面处理过程的流程图。
发明详述
首先介绍高固体含量和水稀释性涂料(例如,底漆涂料和面漆),难以得到有机涂料与铝基底的可靠粘合,即使表面处理方法例如转化型涂布和阳极化过程也不改变。一般地,诸如底漆和油漆的涂料被涂覆在金属上以延迟腐蚀。一个完整的涂布系统由一个或者更多的表面处理组成,例如,转化型涂布过程或者阳极化过程,以便制备进行底漆和油漆涂覆的金属表面。然后,表面制备过程之后是一个或者多个底漆涂层,并且在一些情况下也会涂覆面漆。
本文描述的是表面处理铝的方法,其提供防腐,同时也为有机罩面漆诸如底漆和面漆提供优异的基底(foundation)。
所述表面处理方法最小化或者排除了六价铬的使用,这取决于所选择的转化型涂料,同时,与阳极化和其他表面制备方法相比还改善了有机罩面漆系统的粘合性。结果,通过该表面处理方法达到的防腐优于依靠各种单独的表面处理材料的防腐能力的系统或者处理。图1是阐明上述铝的表面处理方法的流程图10。具体地,将部件清洗,这可以包含脱脂12步骤和单独清洗14步骤两个步骤。在一实施方式中,清洗14步骤是基于碱的清洗步骤。然后对部件进行脱氧16,这可以包含铝去污、浸蚀和脱氧的一个或者多个的组合,这取决于检查和有机罩面漆的要求。在可选择的实施方式中,浸蚀包括酸浸蚀或碱浸蚀。去污指的是除去制备表面上的松散附着膜或者污迹的过程,这些不利地影响后续覆层(plating)对铝的粘合。这些膜污迹一般包括铝中的杂质或者合金成分,并且一般地含有金属成分。在脱氧步骤之后,转化型涂料被涂覆18于部件,转化型涂料诸如,无色转化型涂料,其具有低浓度的六价铬(1-10%铬酸);多色转化型涂料,其具有更高浓度的六价铬(30-60%铬酸),或者没有六价铬的三价转化型涂料。该部件然后在热的去离子水中被漂洗20。该热水的温度范围从大约120华氏度到大约160华氏度。在一个具体的实施方式中,去离子水被加热到大约140华氏度。
低六价铬转化型涂料或者三价铬转化型涂料的使用,当与在热的去离子水中进行的转化后(post-conversion)涂层漂洗相结合时,为有机罩面漆的最后涂覆提供了出众的表面和基底。低六价铬转化型涂料或者三价铬转化型涂料本身一般为暴露的铝提供很少防腐至不提供防腐。但是,由于改善的有机罩面漆的粘合性,弥补了低六价铬转化型涂料或者三价铬转化型涂料所提供的防腐的不足。因此,通过实践图1的方法和后续涂覆有机罩面漆所提供的总体防腐蚀优于高铬转化涂覆的表面所提供的防腐,并且比得上通过阳极化表面提供的防腐。
现有的铝表面制备方案包括铬酸盐化转化型涂料表面处理,或者有铬酸盐密封过程的阳极化方法。这两种现有的方案都会产生较多量的危险废弃物,因为两者目前都不使用去污、浸蚀和脱氧溶液的一个或者多个的组合。阳极化方法使用极大量的能量。然而,在二者中,只有适当地阳极化密封提供相当的有机罩面漆粘合性,如图1所阐明的方法,但是以高得多的成本。总之,图1提议的方法减少了六价铬的使用,减少了能量的使用,并且提供了有机罩面漆对铝的优良粘合,所有这些都以更低的成本。
当用反向冲击试验测量时,用低六价铬转化型涂料或者三价铬转化型涂料处理、随后进行热漂洗的铝,表现出与适当地密封阳极化相同的涂料(例如,油漆)粘合性。该方法用于涂覆低铬涂料的时间周期是大约3分钟,而阳极化的平均时间为25分钟。不同之处在于获得相同涂料粘合性的处理时间减少88%。
方法研究工作已经证明,转化型涂料赋予基底金属的抗腐蚀性能够通过最小化浸蚀和脱氧过程得到改善,浸蚀和脱氧过程是涂覆转化型涂料前通常的工作。当基底金属显示出厚的氧化物污垢时,浸蚀或刻蚀是必要的,并且浸蚀或刻蚀当需要时对有利于非破坏性测试方法是必要的。
如果铝基底金属显示出轻的或者薄的氧化层,诸如由于暴露于大气而产生的氧化物,则以75%硝酸去污溶液处理、随后轻度或者最小暴露于脱氧溶液形成了对转化型涂料而言理想的金属表面状态。如果基底金属上由于热处理或者长时间暴露在环境大气条件下存在厚重氧化层,则以75%硝酸去污溶液处理将使表面氧化物在浸蚀前最少化,因此也将最小化暴露于浸蚀溶液。以75%硝酸去污溶液进行浸蚀后处理除去由于浸蚀而形成于基底铝表面上的化合物,并且去污溶液用作为脱氧的预处理将极大地延长更昂贵的脱氧溶液的使用寿命。
评价图1所描述的方法利用数种不同的环氧底漆配制物完成。在一种分析中,将当使用低铬无色转化型涂料时有机涂料的粘合性能与多色(高六价铬)转化型涂料的粘合性能进行比较。发现该低铬转化型涂料的性能更优异。在另一种分析中,进行了使用低铬转化型涂料的有机涂料粘合性能与使用阳极化方法的部件上粘合性能之间的间接比较。发现表面处理方法在有机罩面漆的粘合性方面是相同的。低铬转化型涂料的性能目前正在测试其抗腐蚀性能。
图1所描述的低六价铬转化型涂料方法的每一个工艺要素在整个工业中都应用,并且被所有的原始设备制造商以一定的形式使用。然而,关于使用每一工艺要素的具体说明由与这些实体相关的工艺说明书决定。
由于与所描述的方法相关的材料一般是可得的,低六价转化型涂料或者三价铬转化型涂料代替阳极化溶液使用,减少工艺周期时间88%。减少周期时间、改善涂料粘合性和排除组件各种状态中琐碎部件的返工/维修具有节省上千工时的潜力。提高的最终用户满意度是另一个可能的结果。
虽然本文提及的转化型涂料具有很少或者没有六价铬,但它们的确为与铬酸和薄膜硫酸阳极化相当的底漆粘合提供了基底。如上提及,此类转化型涂料的最后热漂洗对抗腐蚀性是有害的。但是,底漆粘合的增加引起表面涂层品质和成品部件的寿命的净增长。
改善的有机罩面漆粘合性减少了在用户场所的涂料粘合失败,并且减少了用户重做的工作。改善的有机罩面漆粘合性能也减少腐蚀,以及总的维护费用也被减少。如上所说明,低铬转化型涂料和热水漂洗表面制备过程在油漆粘合通常困难的区域提供了明确的优势。该方法与当前使用的可选方法相比,在更快、更廉价以及使用更少危险废弃物产品方面也提供了益处。
虽然按照各种具体的实施方式描述了本发明,但是本领域技术人员将认识到,本发明可通过在权利要求的精神和范围内进行改变进行实施。
Claims (18)
1.一种改善涂覆在铝部件上的有机罩面漆的粘合性的铝部件表面处理方法,所述方法包括:
清洗(14)所述铝部件;
对所述铝部件脱氧(16);
对所述部件涂覆(18)转化型涂料;和
在热去离子水中漂洗(20)所述部件。
2.根据权利要求1所述的方法,其中漂洗(20)所述部件包括在被加热至范围从大约120华氏度到大约160华氏度的温度的去离子水中漂洗所述部件。
3.根据权利要求1所述的方法,其中漂洗(20)所述部件包括在被加热至大约140华氏度的温度的去离子水中漂洗所述部件。
4.根据权利要求1所述的方法,其中涂覆(18)转化型涂料包括对所述部件涂覆低铬转化型涂料。
5.根据权利要求4所述的方法,其中对所述部件涂覆(18)低铬转化型涂料包括对所述部件涂覆六价铬低的无色转化型涂料。
6.根据权利要求4所述的方法,其中对所述部件涂覆(18)低铬转化型涂料包括对所述部件涂覆无六价铬的三价转化型涂料。
7.根据权利要求1所述的方法,其中清洗(14)所述部件包括:
对所述部件进行脱脂过程;和
对所述部件进行清洗过程。
8.根据权利要求7所述的方法,其中对所述部件进行清洗过程包括对所述部件进行基于碱的清洗过程。
9.根据权利要求1所述的方法,其中对所述部件脱氧(16)包括至少下列之一:
对所述部件去污;以及
对所述部件脱氧。
10.根据权利要求9所述的方法,其中对所述部件去污还包括当所述部件显示出氧化物污垢时浸蚀所述部件。
11.根据权利要求10所述的方法,其中浸蚀所述部件包括:
用基于硝酸的去污溶液浸蚀所述部件;和
将所述部件暴露于脱氧溶液。
12.根据权利要求11所述的方法,其中用基于硝酸的去污溶液浸蚀所述部件包括用基于75%硝酸的去污溶液浸蚀所述部件。
13.根据权利要求9所述的方法,其中对所述部件去污包括使用基于硝酸的去污溶液对所述部件去污。
14.一种铝元件,其具有表面,所述表面被处理以改善涂覆在所述铝元件上的有机罩面漆的粘合性,所述表面通过以下进行处理:
清洗过程;
脱氧过程;
低铬转化型涂布过程;以及
热去离子水漂洗过程。
15.根据权利要求14所述的铝元件,其中所述热去离子水漂洗过程包括在被加热至范围从大约120华氏度到大约160华氏度的温度的去离子水中的漂洗过程。
16.根据权利要求14所述的铝元件,其中所述热去离子水漂洗过程包括在被加热至大约140华氏度的温度的去离子水中的漂洗过程。
17.根据权利要求14所述的铝元件,其中所述低铬转化型涂布过程包括将六价铬低的无色转化型涂料涂覆在所述部件上。
18.根据权利要求14所述的铝元件,其中所述低铬转化型涂布过程包括将无六价铬的三价转化型涂料涂覆在所述部件上。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/137,948 US20090311534A1 (en) | 2008-06-12 | 2008-06-12 | Methods and systems for improving an organic finish adhesion to aluminum components |
US12/137,948 | 2008-06-12 | ||
PCT/US2009/044967 WO2009151924A1 (en) | 2008-06-12 | 2009-05-22 | Methods and systems for improving an organic finish adhesion to aluminum components |
Publications (1)
Publication Number | Publication Date |
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CN101990582A true CN101990582A (zh) | 2011-03-23 |
Family
ID=40921935
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN200980112581.5A Pending CN101990582A (zh) | 2008-06-12 | 2009-05-22 | 改善有机罩面漆与铝元件粘合的方法和系统 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090311534A1 (zh) |
EP (1) | EP2310548B1 (zh) |
CN (1) | CN101990582A (zh) |
CA (1) | CA2718089A1 (zh) |
WO (1) | WO2009151924A1 (zh) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US9683293B2 (en) | 2013-08-07 | 2017-06-20 | The Boeing Company | Reduction of chromium waste water in an aluminum conversion coat processing line |
GB2536098B (en) * | 2014-12-17 | 2019-08-28 | Bae Systems Plc | Object processing |
CN104630766A (zh) * | 2015-01-27 | 2015-05-20 | 广西玉林实力钢建有限公司 | 一种铝合金彩板的生产工艺 |
EP3088571B1 (en) * | 2015-04-28 | 2021-06-02 | The Boeing Company | Environmentally friendly aluminum coatings as sacrificial coatings for high strength steel alloys |
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US2927874A (en) * | 1958-08-14 | 1960-03-08 | Turco Products Inc | Process for producing aluminum surface coatings |
US2976193A (en) * | 1959-08-03 | 1961-03-21 | Purex Corp Ltd | Process and compositions for producing aluminum surface conversion coatings |
US3663441A (en) * | 1970-08-05 | 1972-05-16 | Shipley Co | Preparing aluminum alloys for finishing |
JPS5319974B2 (zh) * | 1972-10-04 | 1978-06-23 | ||
US4111763A (en) * | 1977-07-18 | 1978-09-05 | Swiss Aluminium Ltd. | Process for improving corrosion resistant characteristics of chrome plated aluminum and aluminum alloys |
US4131489A (en) * | 1978-03-31 | 1978-12-26 | Amchem Products, Inc. | Chromate conversion composition and method for coating aluminum using low concentrations of chromate, phosphate and fluoride ions |
US4256547A (en) * | 1979-07-12 | 1981-03-17 | General Dynamics Corporation | Universal chromic acid anodizing method |
US4359346A (en) * | 1981-04-16 | 1982-11-16 | Occidental Chemical Corporation | Trivalent chromium passivate solution and process for yellow passivate film |
US4476263A (en) * | 1983-11-23 | 1984-10-09 | Scm Corporation | Adhesion promoters for sanitary can coatings |
US4576695A (en) * | 1983-11-23 | 1986-03-18 | Scm Corporation | Adhesion promoters for sanitary can coatings |
US5052421A (en) * | 1988-07-19 | 1991-10-01 | Henkel Corporation | Treatment of aluminum with non-chrome cleaner/deoxidizer system followed by conversion coating |
US5226976A (en) * | 1991-04-15 | 1993-07-13 | Henkel Corporation | Metal treatment |
US5192374A (en) * | 1991-09-27 | 1993-03-09 | Hughes Aircraft Company | Chromium-free method and composition to protect aluminum |
US5395687A (en) * | 1992-02-24 | 1995-03-07 | Kawasaki Steel Corporation | Surface-treated aluminum material having improved spot resistance weldability, workability, and corrosion resistance |
JPH05287589A (ja) * | 1992-04-03 | 1993-11-02 | Nippon Paint Co Ltd | アルミニウム又はその合金の化成皮膜形成方法、及びフッ素フリーリン酸塩化成処理剤 |
US5304257A (en) * | 1993-09-27 | 1994-04-19 | The United States Of America As Represented By The Secretary Of The Navy | Trivalent chromium conversion coatings for aluminum |
AU680705B2 (en) * | 1993-11-29 | 1997-08-07 | Henkel Corporation | Composition and process for treating metal |
US6123782A (en) * | 1994-05-27 | 2000-09-26 | Raytheon Company | Nonchromated, primer-free, surface preparation for painting, powder coating and adhesive bonding |
US5935348A (en) * | 1995-11-14 | 1999-08-10 | Henkel Kommanditgesellschaft Auf Aktien | Composition and process for preventing corrosion and reducing friction on metallic surfaces |
US6669786B2 (en) * | 1997-06-27 | 2003-12-30 | Concurrent Technologies Corporation | Self-healing non-chromate coatings for aluminum and aluminum alloys |
US5891952A (en) * | 1997-10-01 | 1999-04-06 | Henkel Corporation | Aqueous compositions containing polyphenol copolymers and processes for their preparation |
US6020030A (en) * | 1998-05-07 | 2000-02-01 | Aluminum Company Of America | Coating an aluminum alloy substrate |
DE19921842A1 (de) * | 1999-05-11 | 2000-11-16 | Metallgesellschaft Ag | Vorbehandlung von Aluminiumoberflächen durch chromfreie Lösungen |
US6488990B1 (en) * | 2000-10-06 | 2002-12-03 | Chemetall Gmbh | Process for providing coatings on a metallic surface |
US7294211B2 (en) * | 2002-01-04 | 2007-11-13 | University Of Dayton | Non-toxic corrosion-protection conversion coats based on cobalt |
US6648986B1 (en) * | 2002-05-13 | 2003-11-18 | United Technologies Corporation | Stability additive for trivalent chrome conversion coating bath solutions |
US7018486B2 (en) * | 2002-05-13 | 2006-03-28 | United Technologies Corporation | Corrosion resistant trivalent chromium phosphated chemical conversion coatings |
US6881279B2 (en) * | 2002-12-11 | 2005-04-19 | Henkel Corporation | High performance non-chrome pretreatment for can-end stock aluminum |
US7144637B2 (en) * | 2004-07-12 | 2006-12-05 | Thomae Kurt J | Multilayer, corrosion-resistant finish and method |
US7084343B1 (en) * | 2005-05-12 | 2006-08-01 | Andrew Corporation | Corrosion protected coaxial cable |
-
2008
- 2008-06-12 US US12/137,948 patent/US20090311534A1/en not_active Abandoned
-
2009
- 2009-05-22 CA CA2718089A patent/CA2718089A1/en not_active Abandoned
- 2009-05-22 CN CN200980112581.5A patent/CN101990582A/zh active Pending
- 2009-05-22 WO PCT/US2009/044967 patent/WO2009151924A1/en active Application Filing
- 2009-05-22 EP EP09763215.2A patent/EP2310548B1/en active Active
Also Published As
Publication number | Publication date |
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CA2718089A1 (en) | 2009-12-17 |
US20090311534A1 (en) | 2009-12-17 |
WO2009151924A1 (en) | 2009-12-17 |
EP2310548B1 (en) | 2013-07-10 |
EP2310548A1 (en) | 2011-04-20 |
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