Development of a zinc-magnesium-aluminium metallic coating for use with pre-finished steels in the construction industry

概述：塔塔钢铁集团是世界十大钢铁制造商之一，分布在全球各地。塔塔钢铁英国公司的涂层产品部门每年生产超过250千吨的预涂钢，用于建筑市场的包层应用。在塔塔肖顿工厂生产的优质品牌产品通常享有长达40年的免维护保修，这是由广泛的全球风化计划数据支持的。传统上，所有优质品牌产品都是使用锌(95%)/铝（5%）镀锌基材生产的。然而，越来越多的证据表明，使用Zn/Mg合金的镀锌衬底可以以更低的成本提供同等的性能。项目目标：使用已知Zn/Mg合金生产的涂层产品容易出现柔韧性和丝状腐蚀问题。该项目旨在考虑各种具有成本效益的合金添加物，如铝或硅衍生物，以优化镀锌罐的化学成分，生产适合用于生产Colorcoat产品的镀锌产品。研究工程师将生产实验室规模的锌/镁镀锌钢板，各种成分的新添加物，并评估物理和腐蚀性能使用SVET，延时显微镜和加速暴露试验，如连续盐雾和预测测试。这些技术将使他们能够在微观结构尺度上评估腐蚀机制。这种显微结构工程和腐蚀现场监测的结合是斯旺西大学所独有的，将为研究工程师提供冶金和腐蚀方面的多样化技能。研究工程师将与Shotton镀锌团队密切合作，推荐锅化学，评估受控生产线试验生产的材料，并将获得将技术从实验室应用到生产过程的关键见解。此外，通过与斯旺西大学金属涂料集团的整合，它将直接获得世界领先的涂料制造和评估设备，并有机会加入一个专注于下一代金属涂料的蓬勃发展的研究小组。预测结果：这项研究将提供与潜在的大麻化学物质有关的信息，这些化学物质将用于发展塔塔肖顿工厂的制造能力。

Overview:The Tata Steel group is among the world's 10 largest manufacturers of steel and is spread over various global locations. The Coated products division of Tata Steel UK produce over 250 KT per annum of pre-painted steel for cladding applications in the construction market. The premium branded products produced at the Tata Shotton site are often supported by maintenance free warranties for up to 40 years, which is backed up by data from an extensive global weathering program. Traditionally all premium branded products are produced using a Zinc(95%)/Al(5%) galvanised substrate. However, there is growing evidence that the galvanised substrates using Zn/Mg alloys can provide an equivalent performance at reduced cost.Project Aims:Coated products produced using known Zn/Mg alloys can be prone to problems with flexibility and filiform corrosion. The project will aim to consider various cost-effective alloying additions such as aluminium or silicon derivatives to optimise galvanising pot chemistries, to produce a galvanised product suitable for use in the manufacture of Colorcoat products.The Research Engineer will produce lab scale Zn/Mg galvanised steel panels of various compositions with novel additions, and assess the physical and corrosion performance using SVET, time-lapse microscopy and accelerated exposure tests such as continuous salt spray and prohesion testing. These techniques will then enable them to evaluate corrosion mechanisms in-situ at a microstructural scale. This combination of microstructural engineering and in-situ monitoring of corrosion is unique to Swansea University and will provide the research engineer with a diverse skill set linking metallurgy and corrosion.The Research Engineer will work work closely with the Shotton galvanising team to recommend pot chemistry and to evaluate material produced from controlled production line trials and will gain a critical insight into the process of taking technology from the lab to production. Furthermore, by being integrated with the metallic coatings group at Swansea University it will provide direct access to world lead coatings manufacturing and evaluation equipment and opportunity to join a thriving research group who are focused on next generation metallic coatings. Predicted outcome:The research will provide information relating to potential pot chemistries that will be used to develop manufacturing capability at the Tata Shotton site.