黄文俊 1万文杰 1武曼航 1项立银 2孔继周 1韦红余1
作者信息
- 1. 南京航空航天大学 机电学院,南京 210016
- 2. 南京航空航天大学 机电学院,南京 210016||中国船舶集团有限公司第七二四研究所,南京 211106
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摘要
Abstract
It is well recognized that the failure of metal materials typically originates from surface damage,which consequently has a great impact on the overall performance and reliability of the whole material.Among the causes of various surface damage,corrosion is one of the main causes,which occurs in diverse environments and contributes to countless disasters.As a result,the study of corrosion and its inhibition has consistently been a focal point of research efforts in related areas.Among the promising technologies in surface treatment,surface self-nanocrystallization(SSNC)has shown significant potential for corrosion mitigation.This technology not only effectively enhances the mechanical properties of materials but also significantly alters their corrosion behaviors.By employing mechanical treatment or non-equilibrium thermal processing,material surfaces can be transformed into a nanocrystalline state while maintaining the bulk composition and phase integrity.Importantly,this approach improves surface performance without introducing concerns related to interfacial bonding,making it a robust solution for surface enhancement.At present,the related research on corrosion behaviors of metals by surface self-nanocrystallization mainly focuses on mechanically induced self-nanocrystallization.The paper aims to elucidate the mechanism by which mechanically induced self-nanocrystallization influences the corrosion behavior of metals.Firstly,the concept and types of surface self-nanocrystallization are introduced.Secondly,several typical mechanically induced self-nanocrystallization techniques and their principles are introduced,discussing the influences of their key process parameters on the corrosion behavior of metals in a systematic manner.It further explores the common mechanisms by which mechanically induced self-nanocrystallization influences metal corrosion,with a focus on the role of mechanically induced self-nanocrystallization in passivation films,surface activity,and microstructure,as well as its influences on corrosion behaviors.In the final section,the challenges and issues encountered in improving metal corrosion behaviors through surface self-nanocrystallization technology and outlines future research directions are summarized.It proposes the integration of more characterization techniques and numerical simulation analysis to decouple various influencing factors,further explaining the mechanisms by which self-nanocrystallization influences metal corrosion behaviors.The paper also suggests combining surface self-nanocrystallization with other surface techniques,such as electroplating,heat treatment,spraying,vapor deposition,and laser cladding,to produce synergistic effects,preparing low-cost surface layers with superior corrosion resistance.Current research primarily explains the changes in metal corrosion behaviors after self-nanocrystallization through the characterization of surface properties,and has not yet formed a unified explanatory mechanism.The influence of mechanically induced self-nanocrystallization on metal corrosion is complex,and changes in a single process parameter may simultaneously produce a variety of favorable and unfavorable factors.By coordinating various process parameters and combining with other treatment processes,it is theoretically possible to achieve directional control of metal material corrosion behaviors,thereby obtaining superior surface layer performance and effectively improving the service life of the material.However,due to the numerous factors influencing corrosion and the difficulty in decoupling them,the influence of self-nanocrystallization on corrosion remains unclear,and further in-depth research is still needed in this field to clarify its intrinsic mechanisms and promote the development of related technologies.关键词
金属材料/自纳米化/腐蚀行为/表面处理/性能调控Key words
metal materials/self-nanocrystallization/corrosion behavior/surface treatment/performance regulation分类
金属材料
