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Corrosion resistance of metals in order: Al, Cu, Ni, Sb, Zn

Q. Hello, I'm a university student and I am doing a project which requires that I know the order of corrosion resistance of the following metals ...aluminium, copper, nickel, tin, zinc -- could any one please help me with this? Thanks.

Mike Angelo
student - Vienna, Austria

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A. Sorry but there is no answer to your question as asked, Mike. What is the project that you are doing?

I'm confident we can answer once you truly understand the question, which could be about activity vs. nobility, the seawater series, resistance to acids vs. oxidizing materials, the fact that oxides and other corrosion products may or may not form a tight & adherent shielding envelope around the substrate, etc.

Ted Mooney,
Ted Mooney, P.E.
Striving to live Aloha - Pine Beach, New Jersey

A. Mike your question is hard to answer different metals react differently to different environments but out of the metals that you have written Aluminium is the most anticorrosive metal ,i can't say anything about copper or zinc.....but aluminium is surely the best becoz aluminium forms a layer of oxide around it and this layer sticks to it as a leech and prevent further corrosion almost to an extent ,heat and energy is required to remove this layer of oxide.

I hope your problem is solved further queries , don't hesitate to ask me I can help you with this.

Shehzad Saleem Khan
- Germany


A. Mike,

Go and have a look at the GALVANIC SERIES ... which you can surely find on an internet search station.

At the bottom you'll see magnesium and then zinc ... towards the top you'll see nickel.

Hence Nickel is # 1 and zinc is # 5. Then it will depend just on WHAT chemical those metals are exposed to. You can't glibly say that that's the right sequence ... but at least the galvanic series will give you a good idea of the relative corrosion resistance. Verstanden? Mal hoffen!

Als der Ted Mooney, der Betriebsleiter von fragte, wofuer brauchst Du diese Informationen? Wofuer die Frage?

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Freeman Newton [deceased]
(It is our sad duty to advise that Freeman passed away
April 21, 2012. R.I.P. old friend).

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