Effect of Aging on the Microstructure and the Intergranular Corrosion Resistance of X2CrNiMoN25-7-4 Duplex Stainless Steel

被引：15
|
作者：
Szabracki, Pawel [1 ]
Lipinski, Tomasz [1 ]
机构：
[1] Univ Warmia & Mazury, PL-10719 Olsztyn, Poland
来源：
APPLIED CRYSTALLOGRAPHY XXII | 2013年 / 203-204卷
关键词：
intergranular corrosion; aging; duplex; XRD;
D O I：
10.4028/www.scientific.net/SSP.203-204.59
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Stainless steels are used widely in many industries. A duplex microstructure offers a combination of advantages, including resistance to crevice and stress corrosion, reduced susceptibility to hot cracking in comparison with fully austenitic structures and excellent tensile strength. The paper discusses the effect of aging on the microstructure and corrosion resistance of X2CrNiMoN25-7-4 super duplex stainless steel. Low and predictable corrosion rate is an important parameter for steels operating in aggressive environments. Resistance to intergranular corrosion expressed by corrosion rate (mm/year) was determined in accordance with standard PN-EN ISO 3651-1. Metallographic studies were carried out to evaluate surface degradation and intergranular corrosion. The results support an evaluation of the impact that phase fraction changes caused by aging have on resistance to intergranular corrosion. The results of the corrosion analysis were used to develop mathematical models describing changes in corrosion rate over time for different phase fractions.
引用
收藏
页码：59 / 62
页数：4
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