Towards Stainless Magnesium

运输部门不断增长的二氧化碳排放量占加拿大温室气体总量的25% 温室气体排放；政府制定了到2050年将温室气体减少45%-65%的目标。节省10% 车辆重量导致6-8%的燃油经济性提高，这意味着(在汽车的生命周期内) 减少二氧化碳排放量17-20公斤，每减少一公斤车辆重量。轻质镁(Mg)，含 密度为2/3的铝(Al)和1/4的钢提供了独特的燃油效率优势，并降低了 有针对性的汽车应用中的排放。镁在这一努力中的一个关键缺点是它对 腐蚀，限制了它的广泛应用。最近，某些合金元素，如砷(As)，在 研究发现，低浓度能延缓导致镁腐蚀的化学反应[1]。FCA加拿大公司是 有兴趣开发一种耐腐蚀的镁合金(“不锈钢镁”)，以扩大轻质镁的用途 其车辆中的结构部件。在这个项目中，我们将开发耐腐蚀的汽车镁合金。 在镁铝基合金中添加As、Bi、Sb和/或Ce等微量元素 通常用于汽车应用。在拟议的项目中，目标是：(1)设计镁铝砷， 使用热力学计算(FactSage)计算的镁铝铋和镁铝锑基合金；(Ii)表征 选定合金成分的微观结构/相选择，以验证热力学计算；以及 (3)对选定组合物的机械性能进行初步评估。成功者 该项目的结果将为与FCA长期合作开发耐腐蚀性铺平道路 镁合金，创新，并确保更高的市场份额。加拿大的下游一级/二级供应商将 也受益于该项目的积极成果。在这个项目中接受培训的HQP将拥有关键的专业知识 轻量级运输应用，并将有助于将这些关键行业保留在加拿大。他们的定位将是 推进我国镁转化产业，具备电子转产技能 显微镜、X射线衍射、机械测试和计算材料工程。

Growing CO2 emissions from the transportation sector contribute 25% of Canada's total greenhouse gas (GHG) emissions; the government has a target for reducing GHGs by 45-65% by 2050. Ten percent saving in vehicle weight leads to 6-8% fuel economy improvement, which translates (during the life time of a car) to 17-20 kg reduced emissions of CO2, per kg of vehicle weight reduced. Lightweight magnesium (Mg) with density 2/3 of aluminum (Al) and 1/4 of steel offers unique advantages for fuel efficiency and reduced emissions in targeted automotive applications. A key shortcoming of Mg in this effort is its susceptibility to corrosion, which limits its wide application. Recently, certain alloying elements such as arsenic (As) added at low levels were found to retard the chemical reactions leading to the corrosion of Mg [1]. FCA Canada Inc. is interested in developing a corrosion resistant Mg alloy ("stainless Mg") to widen the use of lightweight structural components in its vehicles. In this project, we will develop corrosion resistant automotive Mg alloys using trace element additions of As, bismuth (Bi), antimony (Sb) and/or cerium (Ce) to Mg-Al based alloys commonly used in automotive applications. In the proposed project, the objectives are: (i) to design Mg-Al-As, Mg-Al-Bi and Mg-Al-Sb based alloys using thermodynamic calculations (FactSage); (ii) to characterize the microstructures /phase selection of selected alloy compositions to validate the thermodynamic calculations; and (iii) to conduct a preliminary evaluation of the mechanical properties of selected compositions. The successful outcome of this project will pave the path to long term collaboration with FCA to develop corrosion resistant Mg alloys, to innovate, and to secure higher market share. Downstream Tier I/Tier II suppliers in Canada will also benefit from the positive outcome of this project. HQP trained in this project will have key expertise in the lightweight transport applications and will help keep these key industries in Canada. They will be positioned to advance the magnesium transformation industry in the country and have transferable skills in electron microscopy, x-ray diffraction, mechanical testing and computational materials engineering.