Galvanic Corrosion Chart printable pdf download

Galvanic Corrosion Chart

All dissimilar materials have the potential to react with each other when they are brought together in the presence of a

catalyst. In most circumstances this reaction is so mild as to be of no importance, but when the wrong materials are

used in combination and then exposed to an electrolyte such as water the effects can become much more noticeable.

For applications where humidity is low then you can generally ignore galvanic corrosion. If on the other hand you are

working on a project for use in damp conditions or outside then it is best to pay some regard to the possible effects of

galvanic corrosion.

As a rule it is best to use metals which are as close together as possible in the table below. Doing this will help to

eliminate any possibility of galvanic corrosion.

If you do have to mix materials then take a look at the galvanic compatibility section

Active (Anodic) Most Likely To Corrode

Magnesium

Magnesium alloys

Zinc (hot-dip, die cast, or plated)

Aluminium 1100, 3003, 3004, 5052, 6053

Tin (plated)

Lead

Steel 1010

Iron (cast)

Stainless steel 410 (active)

Copper (plated, cast, or wrought)

Nickel (plated)

Chromium (Plated)

Stainless steel 301,304,310 (active)

Stainless steel 430 (active)

Tungsten

Brass

Nickel-silver (18% Ni)

Stainless steel 316L (active)

Bronze 220

Copper 110

Galvanic Corrosion Chart