摘要
为了对超低碳贝氏体高强度钢(ULCB)在海洋环境下的腐蚀性能进行研究,模拟海洋全浸带的环境,通过加速腐蚀试验,对ULCB钢的腐蚀性能和另外两种耐海洋腐蚀钢样进行了耐蚀性能对比。在对SEM,XRD和极化曲线分析后发现,三种耐蚀钢在海水全浸带中的腐蚀主要是点蚀的发生。微观组织是影响钢耐蚀性能的重要因素:铁素体+珠光体组织加速钢的点蚀发生;ULCB钢板条状贝氏体组织细密而均匀,没有明显的晶界,因而钢中微电池的数量大大减少,使其耐蚀性能提高。
Corrosion resistance of ULCB steel and two other marine steels are compared by accelerated immersion corrosion tests in simulated seawater. The analysis of SEM, XRD and polarization curves finds that, pit corrosion is the main kind of corrosion and microstructure is an important factor in corrosion resistance ferrite plus pearlite will speed up pit corrosion. ULCB steel has no coarse carbides existing in lath-shaped bainite microstructure which reduces significantly the number of micro batteries and leads to the improvement of its corrosion resistance.
出处
《武汉科技大学学报》
CAS
2008年第2期127-131,共5页
Journal of Wuhan University of Science and Technology
关键词
ULCB
全浸腐蚀
耐蚀性能
ULCB
immersion corrosion
corrosion resistance
