Equipment for the Evaluation of Environmental Effects on Advanced Steels for Automotive and Pipeline Applications

我们要求使用几种专注于环境退化的工具--例如氢致延迟开裂(DHC)和环境辅助开裂--用于汽车减重和安全增强的下一代先进高强度钢和冲压硬化钢，以及当前和下一代管线钢。这项研究将放在麦克马斯特大学的汽车材料和腐蚀中心(CAMC)内。所要求的工具包括低应变速率拉伸框架和环境控制系统，这是评估环境暴露对汽车系统和管线钢，特别是用于酸性气体服务的先进钢、镁合金和先进铝合金机械性能降低的影响的基本工具。我们还要求将氢传感器与热解吸设备和氢渗透设备集成在一起，我们将使用一些现有的CAMC设备和气密配件来组装这些设备。氢传感器和热解吸装置对于确定我们将样品暴露在腐蚀性环境中的氢的吸附程度以及确定吸收氢的合金的微观结构特征至关重要。利用这些信息，我们可以设计治疗措施，以减轻影响或预测材料在使用过程中的损害。氢传感器和渗透装置将被用来评估阻挡涂层对氢进入我们材料的效果。最后，我们需要两个独立的恒电位器，这是任何电化学测量、样品的氢充电或电镀应用的必要工具。目前，CAMC内部缺乏起作用的恒电位器，这严重阻碍了我们HQP的进展，随着我们的研究方向扩大到包括对下一代汽车和管道材料的基本环境暴露评估，这种情况只会变得更糟。

We are requesting several tools focussed on environmental degradation - e.g. hydrogen-induced delayed cracking (DHC) and environmentally assisted cracking - on the next generation of advanced high strength steels and press hardened steels for automotive weight reduction and safety enhancement, and the current and next generation of pipeline steels. This research will be placed within McMaster University's Centre for Automotive Materials and Corrosion (CAMC). The tools requested include a slow-strain rate tensile frame and environmental control system, an essential tool for assessing the effects of environmental exposure on the reduction of mechanical properties of advanced steels, Mg alloys and advanced Al alloys for automotive systems and for pipeline steels, particularly those destined for sour gas service. We are also requesting a hydrogen sensor for integration with a thermal desorption apparatus and hydrogen permeation apparatus which we will assemble using some existing CAMC equipment and such items as gas-tight fittings. The hydrogen sensor and thermal desorption apparatus are essential to determine the degree of hydrogen adsorption from the corrosive environments we expose our samples to and to determine the microstructural features in our alloys that absorb the hydrogen. Using this information, we can design treatments to mitigate the effect or to predict damage to the materials during service. The hydrogen sensor and permeation apparatus will be used to assess the efficacy of barrier coatings on hydrogen ingress into our materials. Finally, we are requesting two standalone potentiostats, essential tools for any electrochemical measurements, H charging of samples or plating applications. The lack of functioning potentiostats within the CAMC at this time is significantly impeding progress by our HQP, a situation which will only worsen as our research directions expand to include essential environmental exposure assessments on the next generation of automotive and pipeline materials.