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ARC Sewer Corrosion & Odour Research
Linkage Project

Sections

Theme 1 - Corrosion

No. Partner Title Findings Publication Download
(Restricted)
1 UoN Factors Involved in the long term corrosion of concrete sewers Basic factors involved in MIC and their likely influence. Knowledge gaps identified and proposed SCORe research outlined. ACA Corrosion & Prevention Conference, Nov 2009 Full Paper
2 UoN Modelling the long term corrosion of reinforced concrete sewers Outline of the development of a phenomenological model of sewer corrosion by SCORe project. IWA LET2010 Conference, Phoenix, USA, June 2010 Full Paper
3 UQ Microbial community composition of sulfide oxidising biofilm responsible for sewer corrosion Study finds Acidithiobacillus comprise only 4% of microbial community which is much less than previous thought and that microbial corrosion processes have been underestimated. 13th International Society for Microbial Ecology Conference, Seattle, Aug 2010 Poster
4 UQ Establishment of Experimental Setup to Study Corrosion of Concrete in Sewer Systems Describes the experimental set-up that simulates the major controlling factors influencing the service life of concrete sewer pipes and evaluates the influence of these factors on the corrosion rate of concrete. IWA SPN6 Conference, Nov 2010 Full Paper
5 UoS Successive Growth of Micro-organisms in Corrosion of Concrete and Protective Coatings in Gravity Sewers Succession of micro-organisms growth in the corrosion of concrete and protective coatings was evaluated in this study. The activity of fungi and the thiobacilli strains was found to be strongly related to the substrate pH. IWA SPN6 Conference, Nov 2010 Full Paper
6 UQ Microbial Community Composition of Biofilms Associated with Sewer Corrosion. This study suggests that that the corrosion process is the result of the activity of a diverse microbial community and not just At. thiooxidans as previously believed. IWA SPN6 Conference, Nov 2010 Abstract
7 UoS Effect of Film Thickness and Filler Properties on Sulphuric Acid Permeation in Various Commercially Available Epoxy Mortar Coatings Apparent diffusivities were found to be dependent on coating tortuosity. Tortuosity was found to depend on the filler size, their dispersion, filler aspect ratio and concentration. The order and greater alignment of polymer aggregates, which characterises thinner coatings effects higher tortuosity and thus lower permeabilities. The result is that sulphuric acid diffusivities were observed to increase with coating thickness. IWA SPN6 Conference, Nov 2010 Full Paper
8 UoS Sulfuric Acid Permeation in Epoxy Mortar Coatings Comparison of various commercial epoxy mortar coatings resistance to acid permeation based on film thickness and filler properties. AWA Water, March 2011, 74-77 Full Paper
9 UoN Microbial corrosion of sewer pipe in Australia- Initial Field results. Initial findings and trends from corrsion testing in the lab and field after 12 months exposure. International Corrosion Conference, Perth Nov 2011 Full Paper
10 UoN A Collaborative Investigation of Microbial Corrosion of Concrete Sewer Pipe in Australia Results from an extensive program of field and laboratory work are reported which confirms that the corrosion process involves three stages. The timing and corrosion characteristics of each stage, as indicated by the early observations, are discussed. OzWater2012 Conference, Sydney, May 2012 Full Paper
11 UQ Examination of Concrete Corrosion Using a Laboratory Experimental Set up Simulating Sewer Conditions Describes an experimental set-up that simulates the major controlling factors influencing the service life of concrete sewer pipes and evaluates the influence of these factors on the corrosion rate of concrete. Water Research Full Paper
12 UQ Microbial communities involved in the corrosion of concrete sewer infrastructure A culture-independent investigation of the microbial communities within sewer concrete corrosion layers using pyrosequencing of 16S rRNA gene amplicons. The level of diversity is much higher than previously reported and we show the presence of two distinct types of community. 14th International Society of Microbial Ecology Meeting in Copenhagen in August 2012 Abstract
13 UQ High-Throughput Amplicon Sequencing Reveals Distinct Communities within  a Corroding Concrete Sewer System Higher than expected diversity in SCC layer was found through the use of 16S rRNA gene amplicon pyrosequencing. Acidophilic organisms including Acidiphilium, Acidithiobacillus, Actinomycetales and Acidobacteriales dominate these communities. Applied and Environmental Microbiology, 2012, 78(19): 7160-7162 Full Paper
14 UQ Surface Neutralization and H2S Oxidation at Early Stages of Sewer Corrosion: 1 Influence of Temperature, Relative humidity and H2S Concentration The specific influence of environmental variables, such as H2S level, temperature, and relative humidity on the hanges in surface chemistry of concrete during the early stages of corrosion were examined by exposing concrete coupons to thirty-six independent conditions in well-controlled laboratory chambers that simulated conditions typically found in various sewer environments across Australia. Water Research Full Paper
15 UQ Long Term Investigation of Concrete Corrosion Processes in Sewers Fresh and pre-corroded concrete coupons were at different stages of corrosion after 2 years of exposure, thus forming different end products of H2S oxidation. For coupons showing active corrosion, H2S concentration was identified to be a critical parameter in determining the corrosion reactions and is proportional to the concrete loss. OzWater2012 Conference, Sydney, May 2012 Full Paper