Influence of the environment on the atmospheric corrosion of bronze

This paper presents a comparative study of the atmospheric corrosion of bronze samples exposed for 12 months, at two sites: an urban atmosphere with intense traffic, in the city of Lisbon, and a rural marine atmosphere, Caboda Roca, with a high degree of humidity, strong winds and high levels of chl...

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Bibliographic Details
Published in:Journal of applied electrochemistry 2004-10, Vol.34 (10), p.989-995
Main Authors: PICCIOCHI, R, RAMOS, A. C, MENDONCA, M. H, FONSECA, I. T. E
Format: Article
Language:English
Subjects:
Applied sciences
Corrosion
Corrosion mechanisms
Exact sciences and technology
Marine
Metals. Metallurgy
Patina
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Summary:This paper presents a comparative study of the atmospheric corrosion of bronze samples exposed for 12 months, at two sites: an urban atmosphere with intense traffic, in the city of Lisbon, and a rural marine atmosphere, Caboda Roca, with a high degree of humidity, strong winds and high levels of chlorides all the year round. Exposures were started in the summer. Levels of SO2, NO2 and chlorides, in both atmospheres, were measured during the period of exposure. Climatic data for both sites was also collected and analysed. Weight losses and weight gains of samples with 4, 6, 8 and 12 months of exposure were measured and the average corrosion rates calculated. Chemical composition and morphology of the patinas formed during the exposure period, at both sites, were compared as well as the morphology of the corroded surfaces. Significant differences, related to the level of pollutants and meteorological variables, were found.
ISSN:0021-891X
1572-8838
DOI:10.1023/B:JACH.0000042667.84920.e2