Author:
Feng Zhe,Fan Xuehua,Wang Zhu,Yu Yong,Chen Lijuan,Du Yanxia,Dong Lei
Abstract
The effect of high temperature on corrosion behavior and passive film composition of Ni-based alloy 825 in H2S-containing environment was investigated by Confocal Laser Microscope (CLM), Scanning Electron Microscope (SEM), Energy Dispersive Spectrometer (EDS), and X-ray Photoelectron Spectroscopy (XPS). The experiment was carried out at 150 and 230°C in NaCl solution. The partial pressure of H2S was set to 1.2 MPa and CO2 was set to 3.2 MPa. The results showed that Ni-based alloy 825 presented good general corrosion resistance. Pitting corrosion was likely to occur at 230°C because of Cr depleted in the passive film. NiS appeared at high temperature and is damaging to protectiveness of passive film.
Funder
Fundamental Research Funds for the Central Universities
Foundation for Innovative Research Groups of the National Natural Science Foundation of China
Subject
Materials Science (miscellaneous)
Cited by
8 articles.
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