Abstract
Water-cooling using natural waters is typically utilized
for cooling large industrial facilities such as power
plants. Cooling systems using natural water are
susceptible to biofouling, which refers to the
undesirable accumulation of biotic deposits on a surface.
In the industrial systems, the biofouling together with
inorganic fouling and scaling can cause problems such as
an increase in the flow resistance of pipelines or a
decrease in the thermal transfer capacity of the heat
exchangers, and corrosion. Chemical cleaning of the
affected area, for example hypochlorite treatment, is the
main method used for removing unwanted biofilms in the
cooling water systems. The corrosion behaviour of two
stainless steels (AISI 316, SMO 254) in the cooling water
cycle of a power plant using hypochlorite as an
antifouling biocide and the efficiency of the
hypochlorite treatment against fouling were studied here.
The corrosion rate and biofouling were monitored during
the three- month experiment period by using LPR-technique
and a commercial biofouling-probe. The
chlorination pulse increased momentarily the corrosion
rate of both stainless steels. The detected corrosion
rates were so low that visible corrosion could not be
detected within the experiment time. The used
chlorination dose proved to be efficient against
biofouling during the experiment period. The results
highlight the importance of the optimization of usage of
the biocides in both materials performance and biofouling
prevention.
Original language | English |
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Title of host publication | Proceedings of the Eurocorr 2017 |
Publisher | European Federation of Corrosion (EFC) |
Publication status | Published - 1 Jan 2017 |
MoE publication type | Not Eligible |
Event | 20th International Corrosion Congress & Process Safety Congress 2017, Eurocorr 2017 - Prague, Czech Republic Duration: 3 Sept 2017 → 7 Sept 2017 http://www.prague-corrosion-2017.com/ |
Conference
Conference | 20th International Corrosion Congress & Process Safety Congress 2017, Eurocorr 2017 |
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Abbreviated title | Eurocorr 2017 |
Country/Territory | Czech Republic |
City | Prague |
Period | 3/09/17 → 7/09/17 |
Internet address |
Keywords
- biofouling
- microfouling
- cooling water
- stainless steel
- hypochlorite