GALVANIC SERIES

A galvanic series has been drawn up for metals and alloys in seawater, which shows their relative nobility. The series is based on corrosion potential measurements in seawater. The relative position of the materials can change in other environments. The further apart the materials are in this series, the higher the risk of galvanic corrosion.

Most cathodic, noble, or resistant to corrosion

Platinum

Gold

Graphite

Titanium

Silver

/ Chlorimet 3

\ Hastelloy C

/ 18-8 Mo stainless steel (passive)

| 18-8 stainless steel (passive)

\ Chromium steel >11 % Cr (passive)

/ Inconel (passive)

\ Nickel (passive)

/ Silver solder

| Monel

| Bronzes

| Copper

\  Brasses

/ Chlorimet 2

\ Hastelloy B

/ Inconel (active)

\ Nickel (active)

Tin

Lead

Lead-tin solders

/ 18-8 Mo stainless steel (active)

\ 18-8 stainless steel (active)

Ni-resist

Chromium steel >11 % Cr (active)

/ Cast iron

\ Steel or iron

2024 aluminum

Cadmium

Commercially pure aluminium

Zinc

Magnesium and its alloys

Most anodic or easy to corrode

 

 

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