冷喷涂Zn-50Al复合涂层在海水中的耐蚀性能

中国腐蚀与防护学报

2010, Vol. 30

Issue (1): 62-66

研究报告

本期目录 | 过刊浏览

冷喷涂Zn-50Al复合涂层在海水中的耐蚀性能

李海祥;李相波;孙明先;王洪仁;黄国胜

中船重工七二五所青岛分部海洋腐蚀与防护国防科技重点实验室青岛 266071

CORROSION RESISTANCE OF COLD-SPRAYED Zn-50Al COATINGS IN SEAWATER

LI Haixiang; LI Xiangbo; SUN Mingxian; WANG Hongren; HUANG Guosheng

State Key Laboratory for Marine Corrosion and Protection; Luoyang Ship Materials Research Institute (LSMRI); Qingdao 266071

全文: PDF(1127 KB)

摘要:

利用电化学方法和微观测试手段，研究了冷喷涂 Zn-50Al涂层在天然海水环境中的耐蚀性能。研究表明，与纯锌、纯铝涂层相比，对于钢基体，锌铝复合涂层具有更加合适的阴极保护电位，可以大大提高防护寿命；海水环境中涂层表面会形成一层致密稳定的腐蚀产物膜，能有效阻止腐蚀介质向涂层内部的渗透，涂层会保持在一个较低的腐蚀速度。

关键词 ：冷喷涂, Zn/Al涂层, 电化学, 耐蚀性能

Abstract：

The corrosion behaviors of the cold-sprayed Zn-50Al coatings in seawater were characterized by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. 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 Zn/Al coatings, and to study the self-sealing mechanism. The results indicated that the better corrosion resistance of cold-sprayed Zn-50Al coatings compared with Zn coatings due to the better self-sealing effect which effectively prevents further seawater corrosion. It has more appropriate cathodal protection potential than Al coatings and low corrosion rate than Zn coatings, the corrosion rate of the Zn-50Al coatings retained a low level with time.

Key words： cold-sprayed Zn/Al coatings electrochemistry corrosion resistance

收稿日期: 2008-11-28

ZTFLH:

TG174.44

通讯作者: 李相波 E-mail: lixb@sunrui.net

Corresponding author: LI Xiangbo E-mail: lixb@sunrui.net

作者简介: 李海祥，男，1983年生，硕士生，研究方向为金属腐蚀与防护

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引用本文:

李海祥;李相波;孙明先;王洪仁;黄国胜. 冷喷涂Zn-50Al复合涂层在海水中的耐蚀性能[J]. 中国腐蚀与防护学报, 2010, 30(1): 62-66.
LI Hai-Xiang. CORROSION RESISTANCE OF COLD-SPRAYED Zn-50Al COATINGS IN SEAWATER. J Chin Soc Corr Pro, 2010, 30(1): 62-66.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2010/V30/I1/62

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