Comparative study of the behavior of API 5L-X65 grade steel and ASTM A53-B grade steel against corrosion in seawater

ROSA DE LAS MERCEDES VERA ARAVENA, Fabrizio Vinciguerra, Margarita Bagnara

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Low freshwater availability in northern Chile means that many mining companies use seawater for several different processes. The present study analyzes the corrosion behavior of API 5L X65 steel and ASTM 53-B steel in seawater taken from the coast of northern Chile. Electrochemistry (polarization curves) and mass loss (flow simulation) techniques are used. The results obtained from the (static) electrochemical testing give the corrosion potential, corrosion current, corrosion rate, passivity current and pitting potential. All measurements show improved corrosion behavior in seawater for the API 5L X65 steel. The total corrosion rate, which includes the corrosion and erosion processes for the materials in the flow simulation system, was 0.41 μm year-1 at day 10 for the API 5L X65 steel and 0.59 μm year-1 at day 10 for the ASTM A53-B steel. Scanning microscopy observations show the presence of pitting, more so for the ASTM A53-B steel.

Original languageEnglish
Pages (from-to)6187-6198
Number of pages12
JournalInternational Journal of Electrochemical Science
Volume10
Issue number8
StatePublished - 2015
Externally publishedYes

Keywords

  • API 5L X65 carbon steel
  • ASTM A53-B carbon steel
  • Corrosion
  • Mining
  • Seawater

Fingerprint Dive into the research topics of 'Comparative study of the behavior of API 5L-X65 grade steel and ASTM A53-B grade steel against corrosion in seawater'. Together they form a unique fingerprint.

Cite this