Abstract
The present paper reports the on-line monitoring of corrosion behavior of the CuNi 70:30 and Al brass alloys exposed to seawater and complementary offline microbiological analyses.
An electrochemical equipment with sensors specifically set for industrial application and suitable to estimate the corrosion (by linear polarization resistance technique), the biofilm growth (by the BIOX electrochemical probe), the chlorination treatment and other physical-chemical parameters of the water has been used for the on-line monitoring.
In order to identify and better characterize the bacteria community present on copper alloys, tube samples were collected after a long period (1 year) and short period (2 days) of exposition to treated natural seawater (TNSW) and natural seawater (NSW).
From the collected samples, molecular techniques such as DNA extraction, polymerase chain reaction (PCR), denaturing gradient gel electrophoresis (DGGE) and identification by sequencing were performed to better characterize and identify the microbial biodiversity present in the samples.
The monitoring data confirmed the significant role played by biofouling deposition against the passivity of these Cu alloys in seawater and the positive influence of antifouling treatments based on low level dosages.
Molecular analysis indicated biodiversity with the presence of Marinobacter, Alteromonas and Pseudomonas species.
An electrochemical equipment with sensors specifically set for industrial application and suitable to estimate the corrosion (by linear polarization resistance technique), the biofilm growth (by the BIOX electrochemical probe), the chlorination treatment and other physical-chemical parameters of the water has been used for the on-line monitoring.
In order to identify and better characterize the bacteria community present on copper alloys, tube samples were collected after a long period (1 year) and short period (2 days) of exposition to treated natural seawater (TNSW) and natural seawater (NSW).
From the collected samples, molecular techniques such as DNA extraction, polymerase chain reaction (PCR), denaturing gradient gel electrophoresis (DGGE) and identification by sequencing were performed to better characterize and identify the microbial biodiversity present in the samples.
The monitoring data confirmed the significant role played by biofouling deposition against the passivity of these Cu alloys in seawater and the positive influence of antifouling treatments based on low level dosages.
Molecular analysis indicated biodiversity with the presence of Marinobacter, Alteromonas and Pseudomonas species.
| Original language | English |
|---|---|
| Pages (from-to) | 2-6 |
| Number of pages | 5 |
| Journal | Bioelectrochemistry |
| Volume | 97 |
| Early online date | 23 Dec 2013 |
| DOIs | |
| Publication status | Published - 1 Jun 2014 |
Keywords
- copper alloys
- marine corrosion
- molecular ecology
- gradient electrophoresis
