Thanks for the response. Specifically the conductive material that is part of the flux. Need to consider expected failure rate of a component with water soluble flux (OA) residue left under a BGA (BGA too large to allow for complete removal of flux (45mm part). Though I guess it could be a...
Looking for any life expectancy data for water soluble flux going low Z. How long it takes for conductive material to migrate and cause low impedance bridges at any humidity or temperature.