Anat,

why gold on passivated steel? Cosmetic aspect? 
Well, if it's a must, gold over steel is possible.
There are lots of products with that finish, e.g. wrist watches.

Passivation of steel is for protection against corrosion
Gold plating is also for protection against corrosion.
So, you want a double corrosion protection?

Gold is not corrosive in itself and works as a corrosion protection
if the gold is thick and free from pores. If too thin gold is used,
corrosion can start through pores in the gold plating. 

So, if you happen to have minor contaminations in the steel AND a
porous gold plating, there is a risk of pore corrosion. The steel 
surface roughness is also of importance.

As always, there are some 'it depends'. If you describe the part to
be plated, TN may give you a more precise answer.


Inge 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Anat Douek
Sent: den 30 januari 2008 14:37
To: [log in to unmask]
Subject: [TN] galvanic compatibility


Hi,
Is passivated stainless steel 303 can be joined to gold plating,  in
high humidity level,  without creation of corrosion ?
 
Regards,
Anat

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