摘要
825合金在高温高压H2S/CO2腐蚀介质中,经过了720 h的应力腐蚀。试验结果表明:其腐蚀层增厚仅几十微米,试样未产生开裂现象,其耐SSCC性能优异。825合金可自钝化,钝化膜由Cr2O3和Ni O组成,钝化膜的破坏是由于Cl-等复杂介质的联合作用。腐蚀层主要由氧化物和硫化物组成,由于试验温度较低(170℃),反应较为缓慢,腐蚀层很薄,对其力学性能影响很小。
The stress corrosion of 825 alloy was carried out in the environment of high temperature and pressure H2S/CO2 after 720 h. The results show that the thickness of corrosion layers raised several tens of micrometers. And the specimens donot crack with the excellent SSCC resistance property. Meanwhile, the 825 alloy would be passivated spontaneously and the passivated film consists of Cr2O3 and Ni O. The damage of the film is due to the combination effect of Cl^-and other factors. The corrosion layers containing oxide and sulfide are very thin, which has little effect on the mechanical properties of 825 alloy.
出处
《热加工工艺》
CSCD
北大核心
2014年第22期90-93,共4页
Hot Working Technology
