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96223 CORROSION INHIBITION IN THE PRESENCE OF MICROBIAL CORROSION

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Product Number: 51300-96223-SG
ISBN: 96223 1996 CP
Author: Hector A. Videla
Industry: Oil and Gas Production
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Microorganisms influence corrosion by changing the electrochemical conditions at the metal/solution interface. These changes may have different effects, ranging from the induction of localized corrosion to corrosion inhibition. The key to the alteration of conditions at a metal surface and hence, the enhancement or inhibition of corrosion is the formation of a biofilm. On a biologically conditioned metal surtidcc microorganisms can induce corrosion inhibition in several ways: a) by neutralizing the action of a corrosive substance already present in the medium; b) by stabilizing a protective film on a metal surface or c) by inducing a decrease in the medium aggressiveness. Seldomly mentioned in the literature, microbial inhibition of corrosion could be a potentially useful tool to counteract many of the biodeterioration cases encountered in practice. Keywords: microbial corrosion, microbiologicaliy influenced corrosion (MIC), biofilms, corrosion inhibition, extracellular polymeric substances (EPS), sulphate-reducing bacteria (SRB), Serratia marcescens
Microorganisms influence corrosion by changing the electrochemical conditions at the metal/solution interface. These changes may have different effects, ranging from the induction of localized corrosion to corrosion inhibition. The key to the alteration of conditions at a metal surface and hence, the enhancement or inhibition of corrosion is the formation of a biofilm. On a biologically conditioned metal surtidcc microorganisms can induce corrosion inhibition in several ways: a) by neutralizing the action of a corrosive substance already present in the medium; b) by stabilizing a protective film on a metal surface or c) by inducing a decrease in the medium aggressiveness. Seldomly mentioned in the literature, microbial inhibition of corrosion could be a potentially useful tool to counteract many of the biodeterioration cases encountered in practice. Keywords: microbial corrosion, microbiologicaliy influenced corrosion (MIC), biofilms, corrosion inhibition, extracellular polymeric substances (EPS), sulphate-reducing bacteria (SRB), Serratia marcescens
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51316-7322-Methodology for the comparative evaluation of batch biocide performance against microbial corrosion

Product Number: 51316-7322-SG
ISBN: 7322 2016 CP
Author: Dennis Enning
Publication Date: 2016
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This study describes a laboratory test system which was specifically developed to assess the ability of biocides to lower microbial corrosion rates. It was found that the common oilfield biocides THPS and glutaraldehyde, dosed at concentrations of 300 ppm for 4 hours weekly over 5 weeks, could reduce MIC rates from 109.7 mpy to as low as 4.3 mpy
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