SOS pads

You ll notice this when you dip a soap pad into water containing dishwashing detergent. Such detergents are anionics, and, as the manufacturer of SOS pads confirms, steel wool pads infused with soap use cationic surfactants. Why they use cationics, which are generally less effective cleaners, isn t clear, but it likely has to do with steel wool s absorption capabilities. 

Solderability Lead-free solder does not wet as well to solderable surfaces as leaded solder does, so pad size, solder quantity, and flux type and quantity must be taken into account. 

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