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Accelerated Corrosion of 2304 Duplex Stainless Steel by Marine Pseudomonas Aeruginosa Biofilm

The 2304 duplex stainless steel is an alternative to 316L SS in marine applications, while its MIC behavior is barely known. Surface analysis and electrochemical techniques were used to study the corrosion behavior of 2304 DSS caused by the marine aerobe Pseudomonas aeruginosa.

Product Number: 51317--9326-SG
ISBN: 9326 2017 CP
Author: Dake Xu
Publication Date: 2017
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Accelerated Corrosion of 2304 Duplex Stainless Steel by Marine Pseudomonas Aeruginosa BiofilmEnze Zhou Huabing Li Dake Xu Ke YangMicrobiologically Influenced Corrosion (MIC) in the marine environment has caused a serious threat to the safety of the materials. The MIC corrosion rate is usually much faster than the conventional corrosion process. 2304 duplex stainless steel (DSS) has been widely used in marine environment which is one kind of economical and durable marine duplex stainless steel however the MIC investigation of 2304 duplex stainless steel (DSS) is barely known. In this work surface analysis and electrochemical techniques were used to study the biocorrosion behavior of 2304 DSS in the presence of Pseudomonas aeruginosa. Compared with the abiotic control coupon the measurement of the deepest pit depth showed that thePseudomonas aeruginosa biofilm greatly accelerated the pitting corrosion of 2304 DSS (4.8 ?m vs. 11.0 ?m). The presence ofPseudomonas aeruginosa biofilm caused the decrease of Cr content destroyed the passive film. The linear polarization resistance (LPR) electrochemical impedance spectroscopy (EIS) polarization curves and electrochemical noise (EN) all demonstrated that 2304 DSS was susceptible to MIC.

Key words: 2304 Duplex stainless steel, Microbiologically influenced corrosion, Pseudomonas aeruginosa, Biofilm, Pitting.

Accelerated Corrosion of 2304 Duplex Stainless Steel by Marine Pseudomonas Aeruginosa BiofilmEnze Zhou Huabing Li Dake Xu Ke YangMicrobiologically Influenced Corrosion (MIC) in the marine environment has caused a serious threat to the safety of the materials. The MIC corrosion rate is usually much faster than the conventional corrosion process. 2304 duplex stainless steel (DSS) has been widely used in marine environment which is one kind of economical and durable marine duplex stainless steel however the MIC investigation of 2304 duplex stainless steel (DSS) is barely known. In this work surface analysis and electrochemical techniques were used to study the biocorrosion behavior of 2304 DSS in the presence of Pseudomonas aeruginosa. Compared with the abiotic control coupon the measurement of the deepest pit depth showed that thePseudomonas aeruginosa biofilm greatly accelerated the pitting corrosion of 2304 DSS (4.8 ?m vs. 11.0 ?m). The presence ofPseudomonas aeruginosa biofilm caused the decrease of Cr content destroyed the passive film. The linear polarization resistance (LPR) electrochemical impedance spectroscopy (EIS) polarization curves and electrochemical noise (EN) all demonstrated that 2304 DSS was susceptible to MIC.

Key words: 2304 Duplex stainless steel, Microbiologically influenced corrosion, Pseudomonas aeruginosa, Biofilm, Pitting.

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