Ioan: When steel is coated with zinc by hot dipping it bonds with the
iron. Thus producing an intermetallic formation of iron and zinc. So it
is not truly a coating. 

RoHS calls out for mechanical separation of components to their lowest
common denominator. Since the zinc is chemically alloyed with the iron
it cannot be mechanically separated. 

On the counter side I guess one could argue that the top layer of pure
zinc could be mechanically separated from the intermetallic layers
underneath. 

	
Regards
	
Michael Barmuta
	
Staff Engineer
	
Fluke Corp.
	
Everett WA
	
425-446-6076 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan
Sent: Wednesday, September 20, 2006 9:20 AM
To: [log in to unmask]
Subject: [TN] Galvanized RoHS

Hi everybody,

Steve has been kind enough to post a document I have sent to him. The
paper practically says that galvanized steel is not considered a coated
structure, therefore the homogeneous material take on galvanized steel
considers the base material and coating to be one element.

What do you think about this?

Thanks,

Ioan

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