No, it is the same in game. The locks you are referring to are for gimballed weapons. Chaff affects those. In fact that is the whole point of chaff - to break weapons lock. It won't break a cargo scan - whole different deal. Heat sinks may drop your temp to make you go off radar but again, won't affect cargo scan. There are no cargo scans in CQC - that is a pure combat arena as far as I understand it.