Investigation of the rotation speed on corrosion behavior of HP-13Cr stainless steel in the extremely aggressive oilfield environment by using the rotating cage test. (December 2018)

• Record Type: Journal Article
• Authors: Zhao, Yang; Li, Xuanpeng; Zhang, Cheng; Zhang, Tao; Xie, Junfeng; Zeng, Guanxin; Xu, Dake; Wang, Fuhui
• Is Part Of: Corrosion science. Volume 145(2018)
• Page Start: 307
• Page End: 319
• Publication Date: 2018-12
• Subjects: A. Stainless steel -- B. TEM -- B. Polarization -- C. Scale film -- C. High temperature corrosion; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2018.10.011
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Flow decreased the dissolution-precipitation rate, deteriorated the stability and mechanical properties of the scale film. Flow promoted the scale film to be brokendown and formed shallow-disk shape pits. Flow accelerated uniform corrosion rate and the growth of the pitting both in the horizontal and vertical direction. Abstract: The influence of rotation speed on the scale film and pitting mechanism of HP-13Cr SS in high temperature (>180 °C), high salinity (Cl − concentration >60, 000 mg/L) and high CO2 pressure (>4 MPa) oilfield environment was investigated using surface analysis and electrochemical techniques. The results delineated rotation speed decreased the mechanical properties and volume fraction of the amorphous Cr(OH)3 (s) of the scale film. As a result, rotation speed increased the both nucleation susceptibility and growth probability of pitting, the serious pitting corrosion occurred and the geometry changed to shallow-disk shape.