Abstract
| Original language | English |
|---|---|
| Article number | 475 |
| Journal | Materials |
| Volume | 9 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2016 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- biofouling
- microbial influenced corrosion
- Baltic Sea
- biofilm
- materials science
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Influence of Chlorination and Choice of Materials on Fouling in Cooling Water System under Brackish Seawater Conditions. / Rajala, Pauliina (Corresponding Author); Bomberg, Malin; Huttunen-Saarivirta, Elina; Priha, Outi; Tausa, Mikko; Carpén, Leena.
In: Materials, Vol. 9, No. 6, 475, 2016.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Influence of Chlorination and Choice of Materials on Fouling in Cooling Water System under Brackish Seawater Conditions
AU - Rajala, Pauliina
AU - Bomberg, Malin
AU - Huttunen-Saarivirta, Elina
AU - Priha, Outi
AU - Tausa, Mikko
AU - Carpén, Leena
PY - 2016
Y1 - 2016
N2 - Cooling systems remove heat from components and industrial equipment. Water cooling, employing natural waters, is typically used for cooling large industrial facilities, such as power plants, factories or refineries. Due to moderate temperatures, cooling water cycles are susceptible to biofouling, inorganic fouling and scaling, which may reduce heat transfer and enhance corrosion. Hypochlorite treatment or antifouling coatings are used to prevent biological fouling in these systems. In this research, we examine biofouling and materials' degradation in a brackish seawater environment using a range of test materials, both uncoated and coated. The fouling and corrosion resistance of titanium alloy (Ti-6Al-4V), super austenitic stainless steel (254SMO) and epoxy-coated carbon steel (Intershield Inerta160) were studied in the absence and presence of hypochlorite. Our results demonstrate that biological fouling is intensive in cooling systems using brackish seawater in sub-arctic areas. The microfouling comprised a vast diversity of bacteria, archaea, fungi, algae and protozoa. Chlorination was effective against biological fouling: up to a 10-1000-fold decrease in bacterial and archaeal numbers was detected. Chlorination also changed the diversity of the biofilm-forming community. Nevertheless, our results also suggest that chlorination enhances cracking of the epoxy coating.
AB - Cooling systems remove heat from components and industrial equipment. Water cooling, employing natural waters, is typically used for cooling large industrial facilities, such as power plants, factories or refineries. Due to moderate temperatures, cooling water cycles are susceptible to biofouling, inorganic fouling and scaling, which may reduce heat transfer and enhance corrosion. Hypochlorite treatment or antifouling coatings are used to prevent biological fouling in these systems. In this research, we examine biofouling and materials' degradation in a brackish seawater environment using a range of test materials, both uncoated and coated. The fouling and corrosion resistance of titanium alloy (Ti-6Al-4V), super austenitic stainless steel (254SMO) and epoxy-coated carbon steel (Intershield Inerta160) were studied in the absence and presence of hypochlorite. Our results demonstrate that biological fouling is intensive in cooling systems using brackish seawater in sub-arctic areas. The microfouling comprised a vast diversity of bacteria, archaea, fungi, algae and protozoa. Chlorination was effective against biological fouling: up to a 10-1000-fold decrease in bacterial and archaeal numbers was detected. Chlorination also changed the diversity of the biofilm-forming community. Nevertheless, our results also suggest that chlorination enhances cracking of the epoxy coating.
KW - biofouling
KW - microbial influenced corrosion
KW - Baltic Sea
KW - biofilm
KW - materials science
U2 - 10.3390/ma9060475
DO - 10.3390/ma9060475
M3 - Article
VL - 9
JO - Materials
JF - Materials
SN - 1996-1944
IS - 6
M1 - 475
ER -