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，遍布全球各地。英国塔塔钢铁公司的涂层产品部门每年生产超过25万吨的预涂钢，用于建筑市场的覆层应用。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，这是由广泛的全球老化计划的数据支持的。传统上，所有优质品牌产品都使用锌（95%）/铝（5%）镀锌基板生产。然而，越来越多的证据表明，使用Zn/Mg合金的镀锌基板可以提供同等的性能，同时降低成本。项目目的：使用已知的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剂，如铝或硅衍生物，以优化镀锌锅化学，生产适用于生产Colorcoat产品的镀锌产品。研究工程师将生产实验室规模的各种成分的Zn/Mg镀锌钢板，并使用SVET评估物理和腐蚀性能，延时显微镜和加速暴露测试，如连续盐雾和渗透测试。这些技术将使他们能够在微观结构尺度上原位评估腐蚀机制。这种微结构工程和内-腐蚀的现场监测是斯旺西大学独有的，将为研究工程师提供将冶金和腐蚀联系起来的多种技能。研究工程师将与肖顿镀锌团队密切合作，推荐锅化学，评估受控生产线试验生产的材料，并将获得关键的洞察力，了解从技术中获取技术的过程。实验室到生产此外，通过与斯旺西大学的金属涂层小组整合，它将提供直接使用世界领先的涂层制造和评估设备的机会，并有机会加入一个专注于下一代金属涂层的蓬勃发展的研究小组。预测结果：该研究将提供有关潜在的锅化学，将用于开发在塔塔肖顿网站的制造能力的信息。

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.