presentation 1
TRANSCRIPT
2024 / NaCl 3.5% / Cathodic Polarization / OCP
• 30 minutes bubbling O2 / Room temperature / Scan rate: 2 mV s-1 / log i at -0.8 V vs. Ag/AgCl
-9 -8 -7 -6 -5 -4-1.1
-1.0
-0.9
-0.8
-0.7
-0.6
-0.5
E /
V vs.
Ag/
AgC
l
log i / cm-2
Immersion Spray Uncoated
Surface pre treatment E / V vs. Ag/ClUncoated -0.563 ± 0.003 V
Spray Alodine T 5900 RTU -0.578 ± 0.005 VImmersion Alodine T 5900 RTU -0.596 ± 0.002 V
Surface pre treatment log i / A cm-2
Uncoated -4.833 ± 0.040Spray Alodine T 5900 RTU -5.417 ± 0.222
Immersion Alodine T 5900 RTU -5.070 ± 0.052
2024 / Na2SO4 0.5 M / Cathodic Polarization / OCP
• Room temperature / Scan rate: 2 mV s-1 / log i at -0.8 V vs. Ag/AgCl
-10 -9 -8 -7 -6 -5-1.1
-1.0
-0.9
-0.8
-0.7
-0.6
-0.5
-0.4
-0.3
E /
V vs.
Ag/
AgC
l
log i / A cm-2
Immersion Spray Uncoated
Surface pre treatment E / V vs. Ag/AgClUncoated -0.580 ± 0.024 V
Spray Alodine T 5900 RTU -0.400 ± 0.029Immersion Alodine T 5900 RTU -0.450 ± 0.026
Surface pre treatment log i / A cm-2
Uncoated -5.050 ± 0.195Spray Alodine T 5900 RTU -5.363 ± 0.305
Immersion Alodine T 5900 RTU -4.960 ± 0.046
7075 / NaCl 3.5% / Cathodic Polarization / OCP
• 30 minutes bubbling O2 / Room temperature / Scan rate: 2 mV s-1 / log i at -0.8 V vs. Ag/AgCl
-9 -8 -7 -6 -5
-1.0
-0.9
-0.8
-0.7
E /
V vs.
Ag/
AgC
l
log i / A cm-2
Immersion Spray Uncoated
Surface pre treatment E / V vs. Ag/AgClUncoated -0.691 ± 0.008 V
Spray Alodine T 5900 RTU -0.744 ± 0.007 VImmersion Alodine T 5900 RTU -0.688 ± 0.013 V
Surface pre treatment log i / A cm-2
Uncoated -5.300 ± 0.035Spray Alodine T 5900 RTU -5.917 ± 0.038
Immersion Alodine T 5900 RTU -5.990 ± 0.233
7075 / Na2SO4 0.5 M / Cathodic Polarization / OCP
• 30 minutes bubbling O2 / Room temperature / Scan rate: 2 mV s-1 / log i at -0.8 V vs. Ag/AgCl
-11 -10 -9 -8 -7 -6 -5-1.1
-1.0
-0.9
-0.8
-0.7
-0.6
-0.5
E /
V vs.
Ag
/Ag
Cl
log i / A cm-2
Spray Immersion Uncoated
Surface pre treatment E / V vs. Ag/AgClUncoated -0.607 ± 0.021 V
Spray Alodine T 5900 RTU -0.654 ± 0.007 VImmersion Alodine T 5900 RTU -0.666 ± 0.024 V
Surface pre treatment log i / A cm-2
Uncoated -5.413 ± 0.168Spray Alodine T 5900 RTU -6.057 ± 0.217
Immersion Alodine T 5900 RTU -6.877 ± 0.361
2024 / NaCl 3.5% / OCP / different temperatures
• 30 minutes bubbling O2 / Room temperature / 21 oC; 31 oC; 41 oC; 51 oC / Uncoated
15 20 25 30 35 40 45 50 55-0.76
-0.74
-0.72
-0.70
-0.68
-0.66
-0.64
-0.62
-0.60
-0.58
-0.56
Uncoated 2024
E /
V vs.
Ag/
AgC
l
C
Temperature E / V vs. Ag/AgCl21 oC -0.597 ± 0.009 V31 oC -0.616 ± 0.008 V41 oC -0.676 ± 0.044 V51 oC -0.689 ± 0.046 V
2024 / NaCl 3.5% / OCP / different temperatures
• 30 minutes bubbling O2 / Room temperature / 21 oC; 31 oC; 41 oC; 51 oC ; / Immersion Coated / Alodine T 5900 RTU
15 20 25 30 35 40 45 50 55-0.72
-0.70
-0.68
-0.66
-0.64
-0.62
-0.60
-0.58
-0.56
TCP 2024
E /
V vs.
Ag/
AgC
l
C
Temperature E / V vs. Ag/AgCl21 oC -0.582 ± 0.013 V31 oC -0.608 ± 0.036 V41 oC -0.633 ± 0.057 V51 oC -0.646 ± 0.056 V
7075 / NaCl 3.5% / OCP / different temperatures
• 30 minutes bubbling O2 / Room temperature / 21 oC; 31 oC; 41 oC; 51 oC ; / Uncoated
15 20 25 30 35 40 45 50 55-0.82
-0.80
-0.78
-0.76
-0.74
-0.72
-0.70
-0.68
Uncoated 7075
E /
V vs.
Ag/
AgC
l
/ oC
Temperature E / V vs. Ag/AgCl21 oC -0.752 ± 0.058 V31 oC -0.750 ± 0.051 V41 oC -0.720 ± 0.022 V51 oC -0.744 ± 0.036 V
7075 / NaCl 3.5% / OCP / different temperatures
• 30 minutes bubbling O2 / Room temperature / 21 oC; 31 oC; 41 oC; 51 oC ; / Immersion Coated / Alodine T 5900 RTU
15 20 25 30 35 40 45 50 55-0.80
-0.78
-0.76
-0.74
-0.72
-0.70
-0.68
TCP 7075
E /
V vs.
Ag/
AgC
l
C
Temperature E / V vs. Ag/AgCl21 oC -0.702 ± 0.019 V31 oC -0.723 ± 0.029 V41 oC -0.753 ± 0.007 V51 oC -0.773 ± 0.011 V