Evaluating the use of N-heterocyclic carbenes in corrosion resistant coatings for aluminum and magnesium alloys
Evaluating the use of N-heterocyclic carbenes in corrosion resistant coatings for aluminum and magnesium alloys
批准号:
463347-2014
负责人:
Mauzeroll, Janine
金额:
$10.34万
依托单位:
依托单位国家:
加拿大
项目类别:
Strategic Projects - Group
财政年份:
2015
资助国家:
加拿大
项目状态:
已结题
起止时间:
2015-01-01 至 2016-12-31
中文摘要
开发下一代高效汽车,这是汽车行业正在进行的广泛努力
是为了减轻车辆的质量。因此,正在研究的最有希望的方法之一是使用
铝(Al)合金和更有趣的是镁(Mg)合金,这是商业上可行的最轻的
结构材料。镁基部件在汽车中的应用具有挑战性,不仅是因为
不仅具有所需的机械性能,还具有在使用中所需的耐腐蚀性。存在的固有问题
镁合金和镁合金混合材料的耐腐蚀性较差。因此,使用
防腐涂层是制造过程中不可或缺的一部分,但仍然受到涂层的困扰
导致灾难性腐蚀的故障。
大多数镁合金易受微电偶腐蚀,这是因为镁合金中存在多相
不同的电化学电位,导致多个微尺度的电偶腐蚀活动
微观结构。涂层镁合金具有更好的腐蚀性能,但在微米级缺陷中往往失效。
汽车行业,特别是我们的工业合作伙伴通用汽车,希望修改他们目前的
涂层协议包括可防止或修复(自愈)镁合金涂层缺陷的特殊添加剂
目前在他们的车辆中使用的合金。在这个项目中,我们将测试使用的工业可行性
N-杂环卡宾(NHCs)作为防腐添加剂,在其现有的浸泡设施中用于
精选通用汽车目前使用的镁合金和铝合金。
该项目的主要目标是:(1)确定一套有前途的用于铝和镁的卡宾基涂层
合金;(2)评估非电镀的特定涂层的镁和铝合金的腐蚀性能
(3)评价电偶联铝涂层镁合金的腐蚀性能。
(4)确定一种工业上可行的卡宾基耐蚀添加剂,该添加剂与
通用汽车现有的涂层协议。
*************************************************************************************************************************************************
倾注研发效益,L汽车工业继续努力
这是一件非常重要的事情。L在大街上工作,外加L对雇主的热情
铝业联盟(Al)和铝业联盟(ADFAçon)加上国际铝业协会(Inéressante de Magnéimum,简称:镁),这是一种全新的建筑。
乐加L购物中心。L对汽车作曲家的利用
S的问题需要解决,而不能解决的问题是腐蚀
南海特。Les Prolèmes in Hhérents aux alliages de mg et aux alliages Mixtesàbase de mg est Leuvaise
耐腐蚀。安西,L对腐蚀的利用是最重要的
制造过程。腐蚀微电偶对镁的敏感作用
不同的阶段,不同的可能,不同的传导方式,S和S的行动
腐蚀电偶Au sein de la显微结构。梅莱斯的联盟与之并存
S不能腐蚀,L不能腐蚀微米。L实业汽车南海特
修改后的协议实际上是倾倒和倾斜的,S是我们的先驱者
研究(自动修复)L的公用事业联盟S的实施方案
Véhicules。Dans ce ProJet,nous allons tester la FisablitéIndustries d‘Utiliser N-Hétérocyclque Carbènes
(NHC)Comme Additif Résistants as la腐蚀Dans Lur Installations d‘Expersion Pour Un整体
S与通用汽车公司结盟。项目的原则是:(1)
识别符不是合奏的复制品
英文摘要
To develop the next generation of efficient automobiles, an extensive ongoing effort in the automotive industry
is to reduce the vehicle mass. As such, one of the most promising avenues under examination is to employ
alloys of aluminum (Al) and more interestingly magnesium (Mg), which is the lightest commercially feasible
structural material. Application of Mg-based components in automobiles is challenging not only because of the
required mechanical properties but also the desired corrosion resistance in service. Inherent problems with
magnesium alloys and magnesium alloy mixed materials is their poor corrosion resistance. Thus the use of
corrosion resistant coatings is an integral part of the manufacturing process, but remains plagued by coating
failure that results in catastrophic corrosion.
Most Mg alloys are susceptible to microgalvanic corrosion due to the presence of multiple phases with
different electrochemical potentials, leading to multiple micro-scale galvanic corrosion activity within the
microstructure. Coated Mg alloys have improved corrosion properties but often fail in micron scale defects.
The automotive industry, particularly our industrial partner General Motors, wishes to modify their current
coating protocol to include specialized additives that can prevent or repair (self-heal) the coating defects in Mg
alloys currently used in their vehicles. In this project, we will test the industrial feasibility of using
N-heterocyclic carbenes (NHCs) as corrosion resistant additives in their existing immersion facilities for a
select set of Mg and Al alloys currently used in GM vehicles.
The key goals of the project are to: (1) Identify a promising set of carbene-based coatings for Al and Mg
alloys; (2) Evaluate the corrosion properties of specific coated Mg and Al alloys that are not galvanically
coupled; (3) Evaluate the corrosion properties of coated Mg alloys that are galvanically coupled to coated Al
alloys; (4) Identify an industrially viable carbene-based corrosion-resistant additive that is compatible with
GM's existing coating protocol.
*************************************************************************************************************************************************
Pour développer la prochaine génération de voitures efficaces, l'industrie automobile offre un effort continu
afin de réduire la masse du véhicule. L'une des avenues les plus prometteuses à l'étude est d'employer des
alliages d'aluminium (Al) et de façon plus intéressante de magnésium (Mg), qui est le matériau de construction
le plus léger commercialement malléable. L'utilisation de composants à base de Mg dans les automobiles est
difficile non seulement à cause des propriétés mécaniques requises, mais aussi par la résistance à la corrosion
souhaitée. Les problèmes inhérents aux alliages de Mg et aux alliages mixtes à base de Mg est leur mauvaise
résistance à la corrosion. Ainsi, l'utilisation de revêtements résistants à la corrosion est une partie importante du
processus de fabrication. Les alliages de Mg sont sensibles à la corrosion microgalvanique due à la présence de
plusieurs phases ayant des potentiels électrochimiques différents, conduisant à différents degrés d'activités de
corrosion galvanique au sein de la microstructure. Les alliages de Mg avec revêtement ont de meilleures
propriétés de corrosion, mais ont souvent des défauts à l'échelle du micron. L'industrie automobile souhaite
modifier leur protocole de revêtement actuel pour y inclure des additifs spécialisés qui peuvent empêcher ou
réparer (auto - réparation) les défauts de revêtement dans l'alliage de Mg utilisés actuellement dans leurs
véhicules. Dans ce projet, nous allons tester la faisabilité industrielle d'utiliser N-hétérocyclique carbènes
(NHC) comme additifs résistants à la corrosion dans leurs installations d'immersion pour un ensemble
d'alliages de Mg et Al utilisés dans les véhicules GM. Les principaux objectifs du projet sont les suivants: ( 1 )
Identifier un ensemble prometteur de revêtement
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专著(0)
科研奖励(0)
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