Galvanic Series Of Metals In Seawater

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Galvanic Series of Metals in Seawater
Metals and Alloys
Corrosion Potential
(volts DC ref. Ag/AgCl)
Magnesium and Magnesium Alloys
-1.60
to -1.63
anodic - active
Aluminum - Anode
-1.10
Zinc
-0.98
to -1.03
Aluminum Alloys
-0.76
to -1.00
Mild Steel (clean & shiny)
-0.60
to -0.71
Mild Steel (rusted)
-0.20
to -0.50
Cast Iron (not graphitized)
-0.60
to -0.71
Stainless steels
-0.46
to -0.58
Stainless Steel, Type 316 (active in saltwater)
-0.43
to -0.54
Aluminum Bronze (92% Cu, 8% Al)
-0.31
to -0.42
Copper
-0.30
to -0.57
Naval Brass (60% Cu, 39% Zn)
-0.30
to -0.40
Yellow Brass (65% Cu, 35% Zn)
-0.30
to -0.40
Red Brass (85% Cu, 15% Zn)
-0.30
to -0.40
Muntz Metal (60% Cu, 40% Zn)
-0.30
to -0.40
Admiralty Brass (71% Cu, 28% Zn, 1% Sn)
-0.28
to -0.36
Aluminum Brass (76% Cu, 22% Zn, 2% Al)
-0.28
to -0.36
Silicone Bronze (96% Cu max, 0.80% Fe,
1.5% Zn, 2.00% Si, 0.75% MN, 1.60% Sn)
-0.26
to -0.29
90% Cu, 10% Ni
-0.21
to -0.28
75% Cu, 20% Ni, 5% Zn
-0.19
to -0.25
Lead
-0.19
to -0.25
70% Cu, 30% Ni
-0.18
to -0.23
Stainless steel, Type 304 (passive)
-0.05
to -0.10
Stainless steel, Type 316 (passive)
-0.00
to -0.10
Titanium
+0.06
to -0.05
Platinum
+0.25
to +0.19
Carbon, Graphite, Coke
+0.30
to +0.20
cathodic - noble
(Ref ABYC)

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