Crevice Corrosion Behaviors Between CFRP and Stainless Steel 316L for Automotive Applications

论文摘要

Carbon fiber reinforced plastics(CFRP) are promising lightweight materials for vehicle applications. 316 L is one of the most widely used types of austenite stainless steels and applied in lots of automotive applications. The existence of crevices will result in galvanic corrosion and crevice corrosion when CFRPs and 316 L are directly connected. A crevice former for the galvanic system was therefore designed and applied to evaluate the crevice corrosion behaviors and study the mechanism of galvanic crevice corrosion through several electrochemical techniques in this research. The results showed that the crevice corrosion of galvanic systems grew from crevice mouth to the inside crevice and could be divided into four steps, metastable pitting corrosion at the crevice mouth, initiating step of crevice corrosion, propagating step and ending step of crevice corrosion. Because of the influences of the galvanic system, electrode reaction rates were speeded up and the passivation region was shortened at the initiating stage of crevice corrosion. Corrosion rate was observed to be higher in the galvanic system than that in normal crevice systems.

论文目录

• 1 Introduction
• 2 Experimental
•   2.1 Potentiodynamic Polarization Test（PPT）
•   2.2 Cyclic Potentiodynamic Polarization Test（CPP）
•   2.3 Potentiodynamic-Galvanostatic-Potentiody-namic Reverse Scan（PGPD）
•   2.4 Potentiodynamic-Galvanostatic-Potentiostatic Reverse Scan（PGPS）
• 3 Results and Discussion
•   3.1 PPT
•   3.2 CPP
•   3.3 PGPD
•   3.4 PGPS
•   3.5 Infl uence of Galvanic System on Crevice Corro-sion
• 4 Conclusions

文章来源

类型: 期刊论文

作者: Xia-Yu Wu,Jia-Kun Sun,Jia-Ming Wang,Yi-Ming Jiang,Jin Li

来源: Acta Metallurgica Sinica(English Letters) 2019年10期

年度: 2019

分类: 工程科技Ⅰ辑,工程科技Ⅱ辑

专业: 金属学及金属工艺,汽车工业

单位: Department of Materials Science,Fudan University

基金: supported by National Key Research and Development Program of China (Grants No. 2018YFB0704400),National Natural Science Fund of China (Grants Nos. 51671059,51871061,51801028)

分类号: TG142.1;TG172;U465.11

页码: 1219-1226

总页数: 8

文件大小: 3159K

下载量: 10