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Anodic Index: how to measure?

Anodic Index: how to measure?

Anodic Index: how to measure?

(OP)
It's easy to find the AI values of various metals but how is the AI measured?  Is there some test that standardizes how it is done and DEFINES the AI from a theoretical standpoint?  After all, all those published AIs had to some from somewhere!

Tunalover

RE: Anodic Index: how to measure?

Generally one measures the free corroding potential of a metal relative to a standard electrode (several are common).  The materials are then listed by order of their free corroding potential.  

Before this post, I hadn't heard the term "anodic index". Its not listed in McGraw-Hill's Dictionary of Scientific and Technical Terms, ASTM G 15-93, or ASM Handbook Vol 13 Corrosion.

Looking at a few "hits" on the internet, it appears an "anodic index" is simply a galvanic series with the numeric values adjusted not to a standard electrode, but to gold, with gold = 0.0 volts.

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