<span style="font-size:12.0pt;line-height: 115%;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; mso-ansi-language:EN-IN;mso-fareast-language:EN-IN;mso-bidi-language:HI" lang="EN-IN">Inhibition effect of <i>Pseudomonas fluorescens</i> on the microbiologically influenced corrosion of mild steel</span>

Abstract

Naturally occurring biogenic molecules are of considerable interest because of increased attention on the development of environmentally compatible, non-polluting corrosion inhibitors. In the present work mild steel was exposed to culture containing free cells, coated and calcium alginate immobilized <i>P</i>. <i>fluorescens.</i> The corrosion resistance in the presence of immobilized <i>P.</i> <i>fluorences</i> was measured by corrosion potential, potentiodynamic polarizati on and weight loss techniques. Inhibition of mild steel in the iron deficient culture medium of <i>P</i>. fluorences was attributed to the production of siderophores such as enterobactin, parabactin, aerobactin, rhodobactin and ferrichrome which act as chelation agents and become chemisorbed onto the surface of mild steel.