Effect of Pollution on the Corrosion of Galvanized Steel in Cunduacán, Tabasco

Galvanized steel samples were exposed to open air on aluminum panels following the procedures established in norms ISO 8565 and ASTM G 50-76, in a humid tropical climate environment (Cunduacán, Tabasco). The rate of corrosion (loss of mass) was recorded at different time periods (February-July 2009)...

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Main Authors: Del Angel Meraz, Ebelia, Márquez, Dora Maria F., Calderon, Richart F., Gómez, Felipe L., Romero, Juan José Rueda D.
Format: Conference Proceeding
Language:English
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Summary:Galvanized steel samples were exposed to open air on aluminum panels following the procedures established in norms ISO 8565 and ASTM G 50-76, in a humid tropical climate environment (Cunduacán, Tabasco). The rate of corrosion (loss of mass) was recorded at different time periods (February-July 2009), and it presented a C3 (medium) aggressiveness category according to norm ISO 9223:92. In accordance with norm ISO 9223, the deposition rate of the pollutant sulphur dioxide (SO2) corresponded to a low (Po) corrosive aggressiveness category, and that of sodium chloride (NaCl) corresponded to a low (S1) category. X ray analyses indicate the corrosion products that formed on the galvanized steel. These included Simonkoleite [Zn5(OH)8Cl2.H2O], Gordoite [Zn4Na(OH)6(SO4)Cl.(H2O)6] and pentahydrated zinc hydroxisulphate (Zn(OH)2)3(ZnSO4)(H2O)5. The results show the effect of the pollutants (NaCl and SO2) on the corrosion of galvanized steel in Cunduacán, Tabasco.
ISSN:1938-5862
1938-6737
DOI:10.1149/1.3268414