深海环境下Fe基非晶涂层的腐蚀行为及其对涂层结构和性能的影响

项目名称： 深海环境下Fe基非晶涂层的腐蚀行为及其对涂层结构和性能的影响

项目编号： No.51471074

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 柳林

作者单位： 华中科技大学

项目金额： 85万元

中文摘要： 随着陆地能源资源日渐枯竭，世界各国已将目光投向深海能源开发。然而复杂的深海环境和严苛的海洋腐蚀给工程材料的安全服役带来极大的挑战。发展高性能深海工程材料及防护性涂层材料是突破深海能源开发技术瓶颈的关键。近年来发展起来的Fe基非晶涂层因其具有优异的力学和耐蚀性能，在深海工程领域呈现广阔的应用前景，并有望成为新一代深海防护材料。然而，有关Fe基非晶涂层在深海环境下的腐蚀行为以及腐蚀对涂层结构和性能的影响尚缺乏深入研究。本项目拟以典型Fe基非晶涂层为对象，深入开展以下研究：1）非晶涂层在深海环境下的腐蚀行为及影响因素；2）在深海环境中非晶涂层的应力腐蚀特征；3）非晶涂层的结构对腐蚀行为的影响，4）深海腐蚀对非晶涂层结构与性能的影响。通过以上研究，揭示深海环境中非晶涂层的点蚀机制，阐明深海腐蚀对非晶涂层结构和性能的影响规律，为开拓Fe基非晶涂层在深海领域的应用提供技术储备和理论依据。

中文关键词： 非晶合金；热喷涂；腐蚀机理；微观结构；力学性能

英文摘要： With the shortage of energy sources under earth, people are converting eyes to the deep-sea. The complex and harsh corrosion environments in deep-sea, however, bring new challenges to the engineering materials used in the sea, which arose an urgent demand for the development of new advanced anti-corrosion materials and coatings. Fe-based amorphous coatings developed in recent years show a good possibility to be used in deep-see due to their excellent mechanical and anti-corrosion properties. However, little work has been done on corrosion behavior and corrosion effect on structure and performance of the Fe-based amorphous coating in deep-sea enviorment. In this project, typical Fe-based amorphous coatings will be chosen as target materials, then corrosion behavior in deep-sea environment will be extensively studied in both experimental and theoretical aspects. The detailed research contents include: 1) Corrosion behavior and pitting mechanism of Fe-based amorphous coating in deep-sea environment; 2) Stress-corrosion behavior of the coatings in deep-sea; 3) Structure effect (eg., partially crystallized) on corrosion of the coatings' 4) The structure and properties of the coatings after deep-sea corrosion. It is envisaged, on the basis of above mentioned researches, the pitting mechanism of the amorphous coating in deep-sea can be disclosed, and the effect of corrosion on structure and properties of the coatings can be clarified. The present research can provide a new technic support and theoretical base for the development of advanced anti-corrosion coatings in deep-sea engeering applications.

英文关键词： amorphous alloy;thermal spray;corrosion mechanism;microstructure;mechanical properties