title: Control of microbiological corrosion on carbon steel with sodium hypochlorite and biopolymer.
abstract: In the present work, the interaction of a mixture of a biocide, sodium hypochlorite (NaClO), and a biopolymer, xanthan, with carbon steel coupons exposed to seawater in a turbulent flow regime was studied. The cell concentrations, corrosion rates, biomasses, and exopolysaccharides (EPSs) produced on the coupon surfaces with the various treatments were quantified. The corrosion products were evaluated using X-ray diffraction (XRD), and the surfaces of steels were analysed by scanning electron microscopy (SEM). The results indicated that xanthan and the hypochlorite-xanthan mixture reduced the corrosion rate of steel.
authors.affiliation: Department of Chemical Engineering, Pernambuco Federal University, Av. Professor Artur Sá, S/N, Cidade Universitária, CEP 50740-521 Recife, PE, Brazil. Electronic address: olivhsara@gmail.com.
authors.forename: Sara H
authors.initials: SH
authors.lastname: Oliveira
authors.affiliation: Department of Chemical Engineering, Pernambuco Federal University, Av. Professor Artur Sá, S/N, Cidade Universitária, CEP 50740-521 Recife, PE, Brazil. Electronic address: magal@ufpe.br.
authors.forename: Maria Alice G A
authors.initials: MA
authors.lastname: Lima
authors.affiliation: Department of Biochemical Engineering, Rio de Janeiro Federal University, School of Chemistry, Centre of Technology, Block E, Room 109, Ilha do Fundão, CEP 21941-972 Rio de Janeiro, RJ, Brazil. Electronic address: fpfranca@eq.ufrj.br.
authors.forename: Francisca P
authors.initials: FP
authors.lastname: França
authors.affiliation: Department of Mechanical Engineering, Pernambuco Federal University, Avenida da Arquitetura, S/N, Cidade Universitária, CEP 50740-550 Recife, PE, Brazil. Electronic address: magrsv@hotmail.com.
authors.forename: Magda R S
authors.initials: MR
authors.lastname: Vieira
authors.affiliation: Department of Chemical Engineering, Pernambuco Federal University, Av. Professor Artur Sá, S/N, Cidade Universitária, CEP 50740-521 Recife, PE, Brazil.
authors.forename: Pulkra
authors.initials: P
authors.lastname: Silva
authors.affiliation: Department of Mechanical Engineering, Pernambuco Federal University, Avenida da Arquitetura, S/N, Cidade Universitária, CEP 50740-550 Recife, PE, Brazil. Electronic address: urtiga@ufpe.br.
authors.forename: Severino L
authors.initials: SL
authors.lastname: Urtiga Filho
mesh_terms: D003343:Corrosion; D008422:Materials Testing; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D054712:Salinity; D012623:Seawater / Q000737:chemistry; D012973:Sodium Hypochlorite / Q000737:chemistry*; D013232:Steel / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D011135:Polysaccharides, Bacterial; D013232:Steel; D012973:Sodium Hypochlorite; C002563:xanthan gum
keywords: Biopolymer; Microbial corrosion; Sodium hypochlorite