https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:14382 2S concentration in the sewer headspace with pre-corroded coupons experiencing more rapid decreases for a given H₂S concentration. Extensive corrosion of sound concrete has also been observed on pre-corroded samples over this period while minor losses are becoming apparent on new coupons. The combination of pH change, concrete losses and appearance of biological activity on the coupon surface all point to a rapid transition through an initial abiotic corrosion phase to the next stage in which corrosion is the result of neutrophilic microbial activity. A comparison of the early corrosion activity of new and pre-corroded coupons and anomalous readings at one high H2S location also indicate that the corrosion rate will most likely vary in a complex fashion over time and will be influenced by a variety of environmental factors in addition to H₂S levels. As more field data is collected and complementary laboratory and biological data become available a realistic, phenomenological model of this process will be developed allowing the service life of sewer pipes in Australia to be realistically predicted.]]> Wed 11 Apr 2018 13:07:42 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:9061 Wed 11 Apr 2018 09:26:00 AEST ]]>