The corrosion behaviour of galvanized steel in cooling tower water containing a biocide and a corrosion inhibitor

Minnoş, Bihter; Ilhan-Sungur, Esra; Çotuk, Ayşın; Güngör, Nihal Doğruöz; Cansever, Nurhan

doi:10.1080/08927014.2012.763117

Cited by 25 publications

(10 citation statements)

References 44 publications

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“…The protective layer is intended to improve the corrosion resistance, serving as a barrier to the migration or diffusion of chlorination that might exist inside concrete. Currently, the most widely used coatings are epoxy-coated (Khun and Frankel, 2013;Sagues et al, 2010;Shigang et al, 2012;Valentini et al, 2012) or hot-dip galvanising systems (Fayala et al, 2013;Ismail et al, 2012;Kayali and Yeomans, 2000;Minnos et al, 2013). However, it has been reported that epoxy coatings can lead to significant loss in bond strength, by 20-42% compared with bare steel (Kayali and Yeomans, 2000;Yeih et al, 2004).…”

Section: Introductionmentioning

confidence: 95%

Glass ceramic coated rebar for high corrosion resistance and enhanced rebar–concrete bond

Yang¹,

Zheng²,

Wang³

et al. 2014

Magazine of Concrete Research

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Low-softening glass ceramic coatings were applied onto the surface of reinforcing steel rebars via slurry dip-coating and sintering. This work investigated the tensile strength properties of coated rebars, the phase compositions and microstructures of these coatings and their corrosion resistance and bond strength at the rebar-concrete interface.X-ray diffraction analysis revealed that the sintering process led to crystallisation inside the coatings. Scanning electron microscopy images demonstrated that the growth direction of dendrites was from the substrate onto the coating and the coating was well bonded to the substrate. Samples of mix-coated and duplex-coated rebars showed a much lower corrosion rate than a single-coated sample. Compared with the bare rebar, all the coated samples showed more than 40% higher bond strength at the rebar-concrete interface.

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Section: Introductionmentioning

confidence: 95%

Glass ceramic coated rebar for high corrosion resistance and enhanced rebar–concrete bond

Yang¹,

Zheng²,

Wang³

et al. 2014

Magazine of Concrete Research

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“…[2013] gerçekleştirdikleri çalışmada soğutma suyunun galvanizli çelik için oldukça saldırgan olduğunu ve sistemde korozyona yol açarak soğutma kulelerinde operasyonel problemlere ve yapısal arızalara neden olduğunu rapor etmişlerdir [8]. Genellikle bu arızalar ve problemler mikrobiyal aktiviteden kaynaklanmaktadır.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Bi̇yofi̇lm Oluşumunun Galvani̇zli̇ Çeli̇ği̇n Bi̇yokorozyonuna Etki̇si̇ni̇n Elektroki̇myasal Yöntemlerle İncelenmesi̇

Ünsal¹,

Sungur²,

Cansever³

2017

NWSA

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The aim of this study was to investigate the morphology, structure and resistance of the biofilm including mixed bacterial population formed on the galvanized steel surfaces in a model water circulation system by electrochemical methods and to determine the effect of biofilm formation on the corrosion behavior of galvanized steel. The model water circulation system simulating a real cooling tower was run by maintaining uninterrupted supply of water for 3 months. The resistance of biofilm formed on the surface of the galvanized steels, which were removed from the model water circulation system montly, was determined by using electrochemical impedance spectroscopy (EIS). Polarization curves for each coupons were drawn. The biofilm formation and corrosion products were investigated by using scanning electron microscopy (SEM). As a result, it was determined that the structure and resistance of biofilm formed on the galvanized steel surfaces was different in each exposure time and thus the corrosion behavior of galvanized steel surfaces was changed according to time.

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“…In addition to H 2 S, SRB can cause immune response in the individuals with their O antigen, an extracellular polymeric substance, and can cause inflammation, which is the characteristic feature of ulcerative colitis (Sartor, 1997;Sutherland, 1985). Although there are several studies on biofilm formation especially carried out under laboratory conditions and model systems (Bolton et al, 2010;Ilhan-Sungur andÇotuk, 2010;Minnos et al, 2013), no published reports on biofilm-related SRB in a model water distribution system made of polypropylene could be found.…”

Section: Introductionmentioning

confidence: 99%

Occurrence of Aerobic and Anaerobic Bacteria in the Consumer End of a Water Distribution System

Hoca

Üstüntürk-Onan

Ilhan-Sungur

2017

Water Environment Research

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In this study, mixed species biofilm formation including sulphate-reducing bacteria (SRB) on polypropylene surface and bacteriology of network water were investigated in a model water distribution system during a nine-month period. Water and biofilm samples were analyzed for the enumeration of aerobic heterotrophic bacteria (AHB), anaerobic heterotrophic bacteria (ANHB) and SRB. The number of live/dead bacteria was also analyzed by epifluorescence microscopy. In addition, extracellular polysaccharide substances (EPS) extraction, carbohydrate analysis and scanning electron microscope observation were performed. A biofilm with heterogeneous structure formed on the polypropylene surface of the model water distribution system. Live/dead staining data indicated that biofilm matured in the first month. It was observed that especially AHB entered into a viable but not culturable state because of the temperature decrease. It was also noted that temperature is an important environmental factor especially for planktonic SRB. The quantity of carbohydrate significantly decreased according to the temperature.

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The corrosion behaviour of galvanized steel in cooling tower water containing a biocide and a corrosion inhibitor

Cited by 25 publications

References 44 publications

Glass ceramic coated rebar for high corrosion resistance and enhanced rebar–concrete bond

Glass ceramic coated rebar for high corrosion resistance and enhanced rebar–concrete bond

Bi̇yofi̇lm Oluşumunun Galvani̇zli̇ Çeli̇ği̇n Bi̇yokorozyonuna Etki̇si̇ni̇n Elektroki̇myasal Yöntemlerle İncelenmesi̇

Occurrence of Aerobic and Anaerobic Bacteria in the Consumer End of a Water Distribution System

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