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In situ corrosion control in industrial water systems |
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| Authors: | J.F. Batista R.F.C. Pereira J.M. Lopes M.F.M. Carvalho M.J. Feio M.A.M. Reis |
| Affiliation: | (1) Chemistry Department-CQFB, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2825-114 Caparica, Portugal;(2) Instituto de Tecnologia Química e Biológica, Rua da Quinta Grande 6, Apartado 127, 2780 Oeiras, Portugal;(3) Microbiology Research Laboratory, School of Pharmacy, Physical and Biomedical Sciences, University of Portsmouth, St. Michaels' Building, White Swan Road, Portsmouth, PO1 2DT, UK;(4) Chemistry Department-CQFB, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2825-114 Caparica, Portugal |
| Abstract: | The main objective of this study was to evaluate the efficacy of a biocide and a corrosion inhibitor against the corrosion of a circulating pipe in a cooling tower. Isothiazolone was tested as the industrial biocide. The results showed that the biocide by itself or combined with a dispersant was not efficient to control corrosion in the industrial system. Corrosion rates of 0.324 mm/year were recorded in both the presence and absence of the biocide. Corrosion control was successfully accomplished by using a corrosion inhibitor. In the latter case the maximum corrosion rate of 0.024 mm/year were obtained. |
| Keywords: | biocide biodispersant corrosion inhibitor microbiologically influenced corrosion (MIC) |
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