Novel additions to enhance galvanic corrosion resistance of magnesium alloys

增强镁合金耐电偶腐蚀性能的新型添加剂

• 批准号: 2596264
• 金额: --
• 依托单位: Swansea University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2596264
• 关键词: Novel; additions; enhance; galvanic; corrosion

BackgroundThis project, in collaboration with Luxfer MEL Technologies, a world leader in the design and manufacture of Magnesium Alloys for a range of industries, including aerospace, military and biomedical industries will involve fundamental studies aimed at developing and investigating novel, corrosion resistant magnesium alloys.Magnesium alloys are the lightest structural metals (30 % lighter than aluminium alloys) making them ideal candidates for light weighting in weight critical applications such as Formula 1, military and aerospace applications. However, corrosion and corrosion protection remain challenges for magnesium and its alloys, due to its position on the galvanic series with respect to other metals. This project involves designing novel, intrinsically corrosion resistant alloys based on 2 fundamental approaches:1. The use of alloying elements to modify the surface oxide layer of the magnesium alloy.2. The use of alloying elements to poison the cathodic activity within the alloy. Project AimsThis project aims to develop a step change in corrosion resistance of magnesium alloys. Alloys will be produced by Luxfer MEL Technologies with the guidance on ideas and concepts from Swansea university. The aim of the modified alloys will be to investigate the effectiveness of oxide film modification and cathodic site poisoning, in isolation and in combination, on general and galvanic corrosion.The studies will be accompanied with comprehensive in- and ex-situ electrochemical characterization by means of scanning electrochemical techniques in combination with potentiodynamic measurements, amongst others. Surface chemical and structural characterization will be carried using a world class suite of instrumentation including X-ray-photoelectron spectroscopy (XPS), glancing angle X-ray diffraction (XRD), and field emission gun scanning electron microscopy (FEG-SEM), based in the laboratories of the Swansea University corrosion research group.Predicted OutcomesRealistic goals:1. Understanding of the effect of various elements on oxide formation/cathodic poisoning in Mg alloys.2. Understanding of the mechanisms by which these changes occurAmbitious goals:1. Demonstrate improved performance of a material with regards to galvanic corrosion compared with base line materials.2. Develop an understanding that can be applied to a new industrial material.

背景该项目与Luxfer MEL Technologies合作，Luxfer MEL Technologies是一家为一系列行业（包括航空航天，军事和生物医学行业）设计和制造镁合金的世界领导者，将涉及旨在开发和研究新型，耐腐蚀镁合金。镁合金是最轻的结构金属（比铝合金轻30%），使其成为重量关键应用（如一级方程式赛车、军事和航空航天应用）中的理想轻量化候选材料。然而，由于镁及其合金相对于其他金属在电偶系列上的位置，腐蚀和腐蚀防护仍然是镁及其合金的挑战。该项目涉及基于2种基本方法设计新型、本质上耐腐蚀的合金：1.利用合金元素对镁合金表面氧化层进行改性.使用合金元素来毒害合金中的阴极活性。项目目标本项目旨在开发镁合金耐腐蚀性的阶跃变化。合金将由Luxfer MEL Technologies在斯旺西大学思想和概念的指导下生产。改性合金的目的将是调查氧化膜改性和阴极部位中毒的有效性，在隔离和组合，对一般和电偶腐蚀。这些研究将伴随着全面的原位和异位电化学表征，通过扫描电化学技术结合动电位测量，其中包括。表面化学和结构表征将使用世界一流的仪器套件进行，包括X射线光电子能谱（XPS），掠射角X射线衍射（XRD）和场发射枪扫描电子显微镜（FEG-SEM），基于斯旺西大学腐蚀研究小组的实验室。了解各种元素对镁合金氧化物形成/阴极中毒的影响.了解这些变化发生的机制雄心勃勃的目标：1.证明与基线材料相比，材料在电偶腐蚀方面的性能有所改善。2.开发可应用于新工业材料的理解。