Repositorio
Institucional

Vera, Rosa

Valverde, Barbara

Olave, Elizabeth

Diaz-Gomez, Andres

Sanchez-Gonzalez, Rodrigo

Munoz, Lisa

Martinez, Carola

Rojas, Paula

Corrosion Behavior of Copper Exposed in Marine Tropical Atmosphere in Rapa Nui (Easter Island) Chile 20 Years after MICAT

MDPI

METALS

en

Atmospheric corrosion of copper, exposed on a tropical island in the South-Central Pacific Ocean, was reported and compared with those of a very similar study at the same site conducted 20 years earlier. The new measurements-taken over three years of exposure, from 2010 to 2013-quantified corrosion by mass loss, characterized corrosion products by X-ray diffraction (DRX) and Raman techniques, observed the attack morphology by Scanning Electron Microscope (SEM), and evaluated the patina resistance using electrochemical techniques. The results showed a copper corrosivity category of C4, and the main copper patina compound, cuprite, was porous, nonhomogeneous, and thin. Electrochemical measurements showed cuprite layer growth as a function of the exposure time, and the morphology did not favor corrosion protection. Finally, when comparing the results to those of a study 22 years previous, the copper corrosion rates increased only slightly, even with increased contaminants associated with growing local populations and continuous tourism on the island.

2022

artículo original

10.3390/met12122082

PDF

atmospheric corrosion

marine environments

Easter Island (Rapa Nui)

corrosion maps

corrosion of copper

climate change

Ciencia de Materiales

Metalurgia e Ingeniería Metalúrgica

corrosión atmosférica

ambientes marinos

Isla de Pascua (Rapa Nui)

mapas de corrosión

corrosión del cobre

cambio climático

artículo original

versión publicada

CC BY 4.0

CC BY 4.0

acceso abierto

acceso abierto

WOS:000904343700001

verde# dorado

Ciencia de Materiales

Metalurgia e Ingeniería Metalúrgica

CORFO 09CN14-5879

ANID FONDEUIP EQM 160091