Metastable pitting corrosion behavior of the Incoloy 825 liner of metallurgically clad pipe in simulated oilfield produced water
Year: 2024
Type: article
Abstract: This study investigates the metastable pitting corrosion behavior and passive film characteristics of metallurgically clad pipe (MCP) 825 within simulated oilfield produced water. Electrochemical testing and microstructural examination were employed to assess the corrosion behavior . The results revealed a narrowing of the passivation region and an increased frequency of metastable pitting nucleation. These phenomena are attributed to the enlarged grain size and the proliferation of precipitate phases within the MCP 825. X-ray photoelectron spectroscopy analysis unveiled a decreased fraction of Cr 3+ and Fe 3+ ox in the passive film. Additionally, an elevated concentration of vacancies and a rapid vacancy diffusion rate were observed, leading to diminished defect performance as indicated by Mott-Schottky (M − S) and electrochemical impedance spectroscopy (EIS) results.
Authors: Anqing Fu, Chunsheng Wu, Kai Li, Wensheng Li, Xuanpeng Li, Hang Su, Zihan Chen, Chengxian Yin, Zhengyi Xu
Language: English
Subfield: Metals and Alloys
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,430
OpenAlex ID: W4404201877