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02451 MIC ON STAINLESS STEELS IN WASTEWATER TREATMENT PLANTS FIELD TESTS AND A RISK ASSESSMENT

Picture for 02451 MIC ON STAINLESS STEELS IN WASTEWATER...
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Product Number: 51300-02451-SG
ISBN: 02451 2002 CP
Author: A. Iversen
Industry: Water/Wastewater
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Field tests of stainless steels were carried out in six wastewater treatment plants. Welded coupons were tested in the final settling tanks in the plants. Ennoblement of the OCP, similar to that reported from investigations in seawater, was observed at two plants. Pitting corrosion was observed under deposits after the field test on steel grade AISI 304 (UNS S30400) and on AISI 316 (UNS S31600) in one plant. No corrosion was found on 2205 (UNS S31803) after the field tests. Laboratory measurements were also carried out to predict MIC in the final stages of aerobic wastewater treatment systems. The breakdown potential was measured in distilled waters with various amounts of chlorides, nitrates and sulfates according to a factorial design from maximum and minimum values in two levels measured in six plants. A risk window for MIC in wastewater treatment plants was designed, which was in good agreement with the field tests.
Field tests of stainless steels were carried out in six wastewater treatment plants. Welded coupons were tested in the final settling tanks in the plants. Ennoblement of the OCP, similar to that reported from investigations in seawater, was observed at two plants. Pitting corrosion was observed under deposits after the field test on steel grade AISI 304 (UNS S30400) and on AISI 316 (UNS S31600) in one plant. No corrosion was found on 2205 (UNS S31803) after the field tests. Laboratory measurements were also carried out to predict MIC in the final stages of aerobic wastewater treatment systems. The breakdown potential was measured in distilled waters with various amounts of chlorides, nitrates and sulfates according to a factorial design from maximum and minimum values in two levels measured in six plants. A risk window for MIC in wastewater treatment plants was designed, which was in good agreement with the field tests.
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04600 Microbiologically Influenced Corrosion Failure of AISI Type 304 Stainless Steel in a Wastewater Treatment System

Product Number: 51300-04600-SG
ISBN: 04600 2004 CP
Author: Kurissery R. Sreekumari, Kyozo Hirotani, and Yasushi Kikuchi, Osaka University; Katsuya Akamatsu, Ka
Publication Date: 2004
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The rapid and unexpected failure of AISI type 304 stainless steel in a wastewater treatment system was investigated in the laboratory by simulation studies for a period of 4 months. Slime and water samples from the failure site were screened for corrosion causing bacteria.
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03060 HYDROGEN SULFIDE AND MICROBIOLOGICALLY INFLUENCED CORROSION OF CONCRETE, STEEL AND DUCTILE IRON IN WASTE WATER FACILITIES

Product Number: 51300-03060-SG
ISBN: 03060 2003 CP
Author: Kenneth B. Tator P.E.
Publication Date: 2003
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Corrosion and structural deterioration due to microbiologically influenced sulfate reduction and hydrogen sulfide gas oxidation to sulfuric acid are responsible for much of the expense related to santiatry sewage collection systems.  This paper explains the mechanism of this biologically induced corrosion, its consequence, and methods to mediate it.
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05068 Emerging Corrosion Prevention and Control Technologies for Wastewater Treatment Plants

Product Number: 51300-05068-SG
ISBN: 05068 2005 CP
Author: Larry D. Stephenson and Ashok Kumar, US Army Engineering Research & Development Center
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