One possible sacrificial mechanism is {HEAD ~ the complexing} of {TAIL ~ the sacrificial agent} with polyvalent cations in solution, both by neutral and by charged sacrificial complexing agents 
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One possible sacrificial mechanism is { HEAD ~ the complexing } of { TAIL ~ the sacrificial agent } with polyvalent cations in solution , both by neutral and by charged sacrificial complexing agents
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH