Table 1.
Alloy compositions as tested via ICPAES.
Fig 1.
Alloy cut used for testing.
Fig 2.
Electrode prepared from cut metal sample.
Table 2.
Composition of artificial seawater.
Fig 3.
Change in solution pH over time (with insert at higher resolution).
Fig 4.
OCP data over 14 days.
Fig 5.
Enumerated cell density on each alloy after 24 hrs of immersion.
Fig 6.
SEM surfaces of bacterial adhesion after 7 and 14 days.
(a) Alloy A1 after 7 days (b) Alloy A1 after 14 days (c) Alloy A2 after 7 Days (d) Alloy A2 after 14 days (e)Alloy M1 after 7 days (f) Alloy M1 after 14 days.
Fig 7.
SEM surfaces under as deposited and post-corrosion states.
(a) As-Deposited Surface of Alloy M1 (b) Post-Corrosion Surface of Alloy M1 after 14 Days Biotic Conditions (c) As-Deposited Surface of Alloy A1 (d) Post-Corrosion Surface of Alloy A1 after 14 Days Biotic Conditions (e) As-Deposited Surface of Alloy A2 (f) Post-Corrosion Surface of Alloy A2 after 14 Days Biotic Conditions.
Table 3.
Enumerated pits on the surface of corroded alloys post-14 days in biotic conditions.
Fig 8.
Abiotic post-day 14 corrosion of Alloy M1.
Fig 9.
Abiotic post-day 14 corrosion of Alloy A1.
Fig 10.
Abiotic post-day 14 corrosion of Alloy A2.
Fig 11.
Equivalent circuit model of Abiotic system in the study.
Fig 12.
Alternative equivalent circuit model of Biotic system in the study.
Fig 13.
(a) Alloy A1 (b) Alloy A2 (c) Alloy M1 and (d) Corrosion resistance parameter of alloys.
Fig 14.
(a) On Day 7 (b) On Day 14 biotic conditions.
Fig 15.
Bode plot–phase angle Vs frequency.
(a) On Day 7 (b) On Day 14 biotic conditions.
Fig 16.
Bode plot (Zmod vs Freq) for day 14 Biotic vs Abiotic conditions.
Table 4.
Electrochemical impedance parameters obtained with abiotic conditions.
Table 5.
Electrochemical impedance parameters obtained with biotic conditions.
Fig 17.
Proposed transfer mechanism for Alloys A1 and A2.