resumo
An atmospheric corrosion campaign was carried out to update the information on the environmental corrosivity in Portugal, available from earlier MICAT and ICP-Materials projects. This communication summarises the initial atmospheric corrosion of copper, zinc and grey cast iron in the cities of Coimbra and Aveiro. The new data was produced in the scope of the project TRAPHIC, which aimed at evaluating the effects of air pollution on materials in the city of Coimbra. Samples of the three metals were exposed in three different locations and the surface modifications were monitored over time together with the local environmental conditions. Chromatic alterations in copper and zinc were analysed and corrosion products were characterised using SEM/EDS. First-year corrosion rates were measured for the three locations to complement the national corrosivity map. Results indicate the reduction of acidic pollution and decreasing of corrosion rates over the past 30 years in Portugal.
palavras-chave
MARINE AEROSOLS; COASTAL AREA; COPPER; DEPOSITION; STEEL; WIND; SALINITY; METALS
categoria
Materials Science; Metallurgy & Metallurgical Engineering
autores
Vidal, F; Vicente, R; Bastos, AC; Rocha, AMF; Silva, JM
nossos autores
Alexandre Manuel Ferro Rocha
Estudante de doutoramento
António Alexandre Cunha Bastos
Investigador Auxiliaragradecimentos
This work was supported by the Fundacao para a Ciencia e aTecnologia (FCT) in the framework of the research project 'TRAPHIC - Traffic-related air pollution impacts on historic city centres: an integrated approach', reference P2020-PTDC/ECM-URB/3329/2014.