超音速火焰喷涂颗粒增强铁基非晶复合涂层腐蚀机理研究

设备腐蚀是长期困扰火电生产安全的难题，项目以工业纯铁基FeCBCrMo非晶合金为基础，开发一种颗粒强化的新型耐蚀耐磨的铁基非晶复合涂层。围绕颗粒相对铁基非晶复合涂层腐蚀性能的影响机制、颗粒相/非晶基体非互溶界面点蚀萌生规律、铁基非晶复合涂层应力-电化学耦合作用下的腐蚀机理三个关键科学问题展开研究。通过分析非晶复合涂层显微组织、界面状态、应力分布，以及腐蚀性能等，建立基于人工智能网络技术的颗粒相-腐蚀速率之间的多参数定量分析模型，开发颗粒相/非晶基体界面熔合的调控技术；掌握颗粒相特性(种类、含量、尺寸、形状)对铁基非晶复合涂层成形、腐蚀性能的影响规律，以及颗粒相/非晶基体界面点蚀萌生规律，揭示应力-电化学耦合作用下铁基非晶复合涂层的腐蚀机理，在丰富铁基非晶涂层腐蚀理论研究的基础上为火电设备的防腐提供理论依据，最终实现提升我国火电设备的使用寿命和安全性

Due to the challenge of the equipment corrosion which long-term affects the production safety of thermal power, in the project, a new Fe-based amorphous composite coating (Fe-ACC) reinforced with ceramic particles, presenting excellent corrosion resistance and wearing resistance, will be developed basing on the FeCBCrMo alloy system using the industrial raw materials. In this project, it is focus on the three key science issues that the influence mechanism of particle characteristics on the corrosion resistance of Fe-ACC, the pitting initiation in the interface of particle and amorphous matrix, the corrosion mechanism of Fe-ACC under stress electrochemicle coupling. Through the investigations of the microstructure of Fe-ACC, interfacial characteristics and the distribution of internal stress, the multi parameter quantitative analysis model will be established using artificial intelligence network technology the between the particle characteristic and corrosion rate of Fe-ACC, and the controlling technology of the interface bonding will be developed between the reinforcement particle and amorphous matrix. It will be grasped that influence laws of the formation and corrosion properties of Fe-ACC between particle characteristic (category, content, size and shape) and amorphous matrix, the pitting initiation in the interface of particle and amorphous matrix, and explored the corrosion mechanism of Fe-ACC under stress electrochemicle coupling. All of these will enrich the corrosion theory of Fe-ACC and provide the theoretical rules for the anti-corrosion of the equipment in thermal power, finally achieve the improvement of the service life and security for thermal powers in our country.