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Influence of the corrosion products of copper on its atmospheric corrosion kinetics in tropical climate |
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| Authors: | Antonio R Mendoza Francisco Corvo Jorge Gómez |
| Affiliation: | a Corrosion Department, National Centre for Scientific Research, Ave. 25 and 158, P.O. Box 6412, Cubanacan, Playa, Havana, Cuba b Faculty of Physics, University of Havana, San Lazaro and L, 10400, Havana, Cuba c Oil Research Centre, Washington 169, 12000, Havana, Cuba |
| Abstract: | In the present paper, the identification of the corrosion product phases formed on copper under different atmospheres of Cuban tropical climate is reported. Cuprite (Cu2O), paratacamite (Cu2Cl(OH)3), posnjakite (Cu4SO4(OH)6 · 2H2O) and brochantite (Cu4SO4(OH)6) were the main phases identified by X-ray diffraction (XRD) analysis and Fourier transform infrared spectroscopy (FTIR).Copper corrosion products are known to have a protective effect against corrosion. However, a different behaviour was obtained under sheltered coastal conditions. This can be due to the corrosion products morphology and degree of crystallisation, rather than their phase composition. A higher time of wetness and the accumulation of pollutants not washed away from the metal surface can also play an important role. |
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