Publication date: July 2016
Source:International Journal of Biological Macromolecules, Volume 88
Author(s): Sara H. Oliveira, Maria Alice G.A. Lima, Francisca P. França, Magda R.S. Vieira, Pulkra Silva, Severino L. Urtiga Filho
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.
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