海岸工业大气中含Sn耐候钢的应用可行性与耐蚀机理研究

项目名称： 海岸工业大气中含Sn耐候钢的应用可行性与耐蚀机理研究

项目编号： No.51501204

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 穆鑫

作者单位： 中国科学院金属研究所

项目金额： 20万元

中文摘要： 我国主要经济发达区集中分布在东南沿海地区，具有海岸大气环境的特征，但因其工业污染较为严重，又具有工业大气环境的特征，因而属于海岸工业大气环境类型。相比于其它大气环境，海岸工业大气环境复杂，钢铁材料腐蚀严重，大气腐蚀机制并不十分清楚，耐候钢的耐蚀效果也不理想。本项目拟采用干/湿交替腐蚀加速实验方法，模型分析、扫描电镜、X-射线衍射、同步辐射EXAFS、穆斯堡尔谱、极化曲线以及电化学阻抗谱等手段研究在模拟海岸工业大气环境下含Sn耐候钢腐蚀锈层的质量演化特征以及锈层组成、结构及性质的变化，揭示Cu，Sn之间协同作用对含Sn耐候钢大气腐蚀的影响机制，探讨含Sn耐候钢在海岸工业大气环境中的应用可行性，为我国东南沿海地区经济建设提供备选钢材。

中文关键词： 海岸工业环境；耐候钢；大气腐蚀；协同作用；锈蚀演化

英文摘要： In China, most of the cities with a better economic development are loacated in the southeast coastal areas, where the atmospheric environment should belong to coastal atmosphere. However, the atmosphere there is usually polutted by SO2, and thus the cities have a coastal-industrial atmospheric environmnet. Compared to other atmospheric environment, coastal-industrial atmospheric environment is complex. In this environment, the corrosion of steel materials is serious, atmospheric corrosion mechanism is not clear enough, the effect of weathering steel corrosion is not satisfactory. To better gain the relationships between the evolution of corrosion weight-gain and the rust layers features of Sn weathering steel exposed to coastal-industrial atmospheres, the present investigation will study the evolution of corrosion of Sn weathering steel in simulated coastal-industrial atmospheres by using the wet/dry cyclic corrosion tests, model-fitting analysis, SEM, XRD, synchrotron radiation EXAFS, Mössbauer spectroscopy, polarization curves and electrochemical impedance spectroscopy (EIS) measurements. These information will contrubute to a clear understanding of the corrosion mechanisms of the atmospheric corrosion of Sn weathering steel in coastal-industrial atmospheres. The study revealed the influence mechanism of the synergistic effect of Cu and Sn on the atmospheric corrosion of Sn weathering steel, and also promoted the development of Sn weathering steel that resistant to such kind of atmosphere.

英文关键词： coastal-industrial environment;weathering steel;atmospheric corrosion;synergistic effect;rusting evolution