Computer-Based Development of Interdiffusion Coatings for High-Temperature-Corrosion Protection of Low-Alloy Steels

基于计算机的低合金钢高温腐蚀防护互扩散涂层的开发

• 批准号: 259316021
• 负责人: Professor Dr.-Ing. Ulrich Krupp
• 金额: --
• 依托单位: Institut für Eisenhüttenkunde (IEHK)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/259316021?language=en
• 关键词: Computer; Based; Development; Interdiffusion; Coatings

The bilateral research project aims at the development and computer modeling of a novel concept to apply corrosion-protective interdiffusion layers on top of low alloy steels for high-temperature applications, e.g., in power generation. Individual layers of Ni, Cr and Al will be applied to specimens by electrodeposition (Cranfield University). Adjusting a vacuum heat treatment of the electroplated specimens allows the generation of tailor-made gradient coatings that are capable to protect the substrate against high-temperature corrosion. This will be proven by oxidation testing (Univ. of Applied Sciences Osnabrück UOS). Focus of the project at UOS is the development of a computer model based on the cellular automat approach that accounts for multi-element interdiffusion, including (i) separation between bulk and grain boundary diffusion, (ii) mechanical stress effects and (iii) the formation of Kirkendall porosity. As a result, the interdiffusion coating process will be modeled and predicted with the objective to optimize the corrosion protection.

该双边研究项目旨在开发一种新概念并进行计算机建模，在低合金钢顶部应用耐腐蚀相互扩散层，用于高温应用，例如发电中的镍、铬和铝的单层。通过电沉积应用于样品（克兰菲尔德大学），调整电镀样品的真空热处理可以生成能够保护基材免受高温腐蚀的定制梯度涂层。通过氧化测试（奥斯纳布吕克应用科学大学 UOS），UOS 项目的重点是开发基于元胞自动机方法的计算机模型，该方法可解释多元素相互扩散，包括 (i) 块体和晶界之间的分离。扩散、(ii) 机械应力效应和 (iii) 柯肯德尔孔隙的形成 因此，将对相互扩散涂层过程进行建模和预测，以优化腐蚀防护。