Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Blue-Film on surface of leadfree Pot

Views: 2706

#66461

Blue-Film on surface of leadfree Pot | 30 May, 2012

Recently we have noticed a purple-blue colour film on the surface of the molten solder. It can be cleared when de-drossing the pot. The pot will normally go a yellow/gold colour before it turns purple-blue. Is this most likely an oxide of the tin or is this a contamination issue?

Attachments:

reply »

#66466

Blue-Film on surface of leadfree Pot | 31 May, 2012

This is common and not an issue it is just the surface oxide

Bob Willis

This message was posted via the Electronics Forum @

reply »

#66469

Blue-Film on surface of leadfree Pot | 31 May, 2012

Thanks Bob

reply »

SMT spare parts - Qinyi Electronics

ICT Total SMT line Provider