冷喷涂铬锆铜涂层在海水中的耐蚀性能

中国腐蚀与防护学报, 2012, 32(1): 18-22.

冷喷涂铬锆铜涂层在海水中的耐蚀性能

1.1. 中国海洋大学化学化工学院青岛 2661002. 海洋腐蚀与防护重点实验室中船重工七二五所青岛分部青岛 2661013. 油气藏地质及开发工程国家重点实验室（西南石油大学）成都 610500 )>

1.1. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 2661002. Science and Technology on Marine Corrosion and Protection Laboratory, Luoyang Ship Materials Research Institute,Qingdao 2661013. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University,Chengdu 610500>

关键词：冷喷涂 , CrZrCu alloy coating , electrochemistry , corrosion resistance

CORROSION RESISTANCE OF COLD-SPRAYED CrZrCu ALLOY COATING IN SEAWATER

XIAO Zhengtao , LI Xiangbo , WANG Jia , HUANG Guosheng , ZHOU Xiong

Keywords： cold-spray , 铬锆铜涂层 , 电化学 , 耐蚀性能

采用冷喷涂技术在普通碳钢基体上制备了厚度为300 μm的铬锆铜涂层，用扫描电子显微镜(SEM)观察涂层的组织形貌。用开路电位（OCP）、电化学阻抗谱和动电位极化曲线等电化学方法研究冷喷涂铬锆铜涂层在天然海水中的耐蚀性能。研究表明，铬锆铜涂层组织致密，在海水环境中，涂层表面形成一层致密的腐蚀产物膜，能有效阻止腐蚀介质向涂层内部渗透，对基体起到良好的保护作用。

CrZrCu alloy coating was deposited on the steel substrate using the cold spray technology. The morphologies of CrZrCu alloy coating were investigated by means of scanning electron microscope (SEM). The corrosion behaviors of CrZrCu alloy coatings in seawater were characterized by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The X-ray diffraction (XRD) results of corrosion products and scanning electron microscopy (SEM) analysis of corrosion surface were used to comparatively investigate the corrosion properties of CrZrCu alloy coating. The results indicated that CrZrCu alloy coating has a more dense microstructure. CrZrCu alloy coating has good corrosion resistance, and the corrosion rate of CrZrCu alloy coatings retained a low level with time.

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