Evaluation of the bactericidal characteristics of nano-copper oxide or functionalized zeolite coating for bio-corrosion control in concrete sewer pipes

Haile, Tesfaalem; Nakhla, George; Allouche, Erez N.; Vaidya, Saiprasad

doi:10.1016/j.corsci.2009.08.046

Cited by 60 publications

(27 citation statements)

References 26 publications

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“…18 the most useful strategies to ameliorate the damaging effects (Haile et al, 2010;Hashimoto, 381 2001). However, all corrosion reduction practice will lead to higher gaseous H 2 S 382 concentration, potentially causes more odor problems.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Identification of controlling factors for the initiation of corrosion of fresh concrete sewers

et al. 2015

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8The development of concrete corrosion in new sewer pipes undergoes an initiation process 9 before reaching an active corrosion stage. This initiation period is assumed to last several 10 months to years but the key factors affecting the process, and its duration, are not well 11 understood. This study is therefore focused on this initial stage of the corrosion process and 12 the effect of key environmental factors. Such knowledge is important for the effective 13 management of corrosion in new sewers, as every year of life extension of such systems has a 14 very high financial benefit. This long-term (4.5 year) study has been conducted in purpose-15 built corrosion chambers that closely simulated the sewer environment, but with control of 16 three key environmental factors being hydrogen sulfide (H 2 S) gas phase concentration, 17 relative humidity and air temperature. Fresh concrete coupons, cut from an industry-standard 18 sewer pipe, were exposed to the corrosive conditions in the chambers, both in the gas phase 19 and partially submerged in wastewater. A total of 36 exposure conditions were investigated to 20 determine the controlling factors by regular retrieval of concrete coupons for detailed analysis 21 of surface pH, sulfur compounds (elemental sulfur and sulfate) and concrete mass loss. 22 M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT2 Corrosion initiation times were thus determined for different exposure conditions. It was 23 found that the corrosion initiation time of both gas-phase and partially-submerged coupons 24 was positively correlated with the gas phase H 2 S concentration, but only at levels of 10 ppm 25 or below, indicating that sulfide oxidation rate rather than the H 2 S concentration was the 26 limiting factor during the initiation stage. Relative humidity also played a role for the 27 corrosion initiation of the gas-phase coupons. However, the partially-submerged coupons 28were not affected by humidity as these coupons were in direct contact with the sewage and 29 hence did have sufficient moisture to enable the microbial processes to proceed. The 30 corrosion initiation time was also shortened by higher gas temperature due to its positive 31 impact on reaction kinetics. These findings provide real opportunities for pro-active sewer 32 asset management with the aim to delay the on-set of the corrosion processes, and hence 33 extend the service life of sewers, through improved prediction and optimization capacity. 34 35

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Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Identification of controlling factors for the initiation of corrosion of fresh concrete sewers

et al. 2015

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“…This simple indicates that the amount of FeCr 2 O 4 , Fe 3 O 4 , and FeCl 2 was increased with increasing immersion time. For Cu-3Cr steel, Cu 2 O was also found in the corrosion scale and exhibited antimicrobial characteristics, 12) as exhibited in Fig. 3.…”

Section: Identification Of the Phases In The Corrosion Scalementioning

confidence: 85%

Corrosion Resistance of Cu-modified 3Cr Low-alloy Steel in 3.5%NaCl Solution

Zhang

Liu

et al. 2017

ISIJ Int.

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The effect of Cu addition on the corrosion behavior of 3Cr steel in 3.5 wt.% NaCl solution was investigated by immersion tests and electrochemical measurements. Cu was selected to partially replace Cr in Cu-modified 3Cr steel. Cu addition can improve corrosion resistance of 3Cr steel at the initial stage, and then the phenomenon gradually weakens with increasing immersion time. The reduced corrosion resistance of 3Cr steel caused by Cr decrease suitably offset by the presence of Cu, resulting a reduced-cost Cu-modified 3Cr steel without sacrificing ether its mechanical properties or corrosion resistance.

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“…This approach includes applications of admixtures, protective coatings, protective biofilms, and acid-resistant cement to prevent chemical attack by sulfuric acid [52,53].…”

Section: Control and Mitigation Of Microbially Induced Concrete Corromentioning

confidence: 99%

Corrosion and odor management in sewer systems

Jiang

Sun

Sharma

et al. 2015

Current Opinion in Biotechnology

131

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Evaluation of the bactericidal characteristics of nano-copper oxide or functionalized zeolite coating for bio-corrosion control in concrete sewer pipes

Cited by 60 publications

References 26 publications

Identification of controlling factors for the initiation of corrosion of fresh concrete sewers

Identification of controlling factors for the initiation of corrosion of fresh concrete sewers

Corrosion Resistance of Cu-modified 3Cr Low-alloy Steel in 3.5%NaCl Solution

Corrosion and odor management in sewer systems

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