Atmospheric corrosion and impact toughness of steels: Case study in steels with and without galvanizing, exposed for 3 years in Rapa Nui Island

Rosa Vera, Bárbara Valverde, Elizabeth Olave, Rodrigo Sánchez, Andrés Díaz-Gómez, Lisa Muñoz, Paula Rojas

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We studied atmospheric corrosion on Rapa Nui Island, using galvanized and non-galvanized SAE 1020 steel samples exposed on racks. We also added Charpy samples of both materials to directly determine the effect of corrosion rate on these materials' impact toughness. The results indicated a correlation between corrosion rate and toughness loss in the studied materials. In the corrosion study, we could also demonstrate the effect from increased insular population growth on contaminants which aid atmospheric corrosivity. Results showed that atmospheric SO2 has tripled compared with similar corrosion studies done 20 years ago (Mapa Iberoamericano de Corrosión, MICAT), increasing corrosion rates. Our results show how human factors can influence changes in environmental variables that strengthen corrosion.

Original languageEnglish
Article numbere17811
JournalHeliyon
Volume9
Issue number7
DOIs
StatePublished - Jul 2023
Externally publishedYes

Keywords

  • Galvanized steel
  • Impact toughness
  • Marine environment
  • Mild steel
  • atmospheric corrosion

Fingerprint

Dive into the research topics of 'Atmospheric corrosion and impact toughness of steels: Case study in steels with and without galvanizing, exposed for 3 years in Rapa Nui Island'. Together they form a unique fingerprint.

Cite this