Parametric study of the corrosion of API-5L-X65 QT steel using potentiostat based measurements in a flow loop

Arjun Ravikumar, Paul Rostron, Nader Vahdati, Oleg Shiryayev

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Low-carbon steel is widely used in industrial pipelines, and corrosion studies are focused mostly on erosion-corrosion, its prediction and control. In this paper, the corrosion rate in pipelines is modeled using a flow loop and measured by linear polarization resistance method (LPR) using a 3-electrode corrosion setup for API-5L-X65 QT steel. Optical microscopy and SEM studies are conducted to examine the surface of the sample and the corrosion products. The effect of NaCl concentration on the corrosion rate is studied at different pH, temperature range, and flow velocities with dissolved oxygen content in the solution maintained at 6 mg/L (6ppm). The corrosion rate is found to be varying from 1 mil per year (0.0254 mmyr−1 ) to 10 mils per year (0.254 mmyr−1 ), and the corrosion rate increases with the flow velocity and reaches a maximum at Reynolds Number above 10,000. Further increase in fluid velocity shows corrosion is flow insensitive, and uniform corrosion is predominant in the region.

Original languageBritish English
Article number444
Pages (from-to)1-17
Number of pages17
JournalApplied Sciences (Switzerland)
Volume11
Issue number1
DOIs
StatePublished - 1 Jan 2021

Keywords

  • Flow loop
  • Linear polarization resistance
  • Pipeline corrosion
  • Predictive equation

Fingerprint

Dive into the research topics of 'Parametric study of the corrosion of API-5L-X65 QT steel using potentiostat based measurements in a flow loop'. Together they form a unique fingerprint.

Cite this