Citric acid cleaning of mild steel prior to and post silver soldering

[Con Nicoll 1Participant @connicoll1]

Hi,

Citric acid causes mild steel to corrode on removal of items from solution. it appears that this can be avoided by:-

Total immersion for cleaning in solution. No part of item exposed to air.

Immediately rinsing in clean soap and water on removal.

questions:-

Suppliers recommendation is 20gms/ltr solution. Is this the minimum necessary for 100% solution?

Is 100% solution necessary to avoid corrosion of mild steel?

This appears to work but I'd like confirmation that my assumptions are correct.

[Con Nicoll 1Participant @connicoll1]

Corrosion of steel

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