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Brian Martley
Galvanic Series in Sea
Water
This page is a bit theoretical in
that it shows the relative positions of a series of metals taken in sea
water (brine solution) at ambient temperatures. It isn't directly related
to all chemical environments, but is an indication of alloy
passivity
No
Corrosion |
Platinum
Gold |
Cathodic, sometimes referred to as "Noble" Metals in this
area do not corrode easily and are
immune |
|
Graphite |
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Silver |
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Type 316 Stainless steel
(Passive)
Type 304 Stainless steel
(Passive) |
Note the reference to "passive". This means a
fully passivated alloy with no breaks in the Chrome oxide film. In
this state the alloys are very corrosion
resistant |
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Titanium |
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Type 410 Stainless steel
(Passive) |
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70-30
Cupro-Nickels |
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Silicon Bronze |
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Copper |
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Brass Alloys
(Copper-zinc) |
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Manganese
Bronze |
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Tin |
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Lead |
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Type 316 Stainless steel
(Active)
Type 304 Stainless steel
(Active)
Type 410 Stainless steel
(Active) |
Interesting position. Note the difference
between the SS in passive and active conditions. Thus if the passive
film is problem on a micro scale there will be a high current
density between the passive and active areas - hence the high
driving rates for pitting
attack. |
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Cast
Iron |
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Carbon Steel (Mild
Steel) |
No
surprise here - we all know carbon steel will corrode in salt water
! |
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Aluminium
Alloys |
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Galvanised Steel,
Zinc |
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Rapid
Corrosion |
Magnesium |
Anodic end of the series, sometimes referred to as
"Active". Alloys in this area will corrode
rapidly |
Disclaimer : All information is supplied as a guide only.
No Guarantee as to its reliability can be issued.
You use this information entirely at your own risk.
No Reproduction or Reuse without prior written consent.
© Elise FAQ Team 2002
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