Lead Carbonate formation is almost certainly a two step process.

The first step is probably formation of Lead oxide, or other Lead salt,
probably done at high temperature, and/or aided by some chemical that is more
aggressive than Carbonate, like Chloride.

The second step is the reaction of this Lead salt, with either your
Armaclean, or atmospheric Carbon Dioxide, to give you Lead Carbonate.

Not sure how much this helps, but this is an analysis knowing the chemical
properties.

Rudy Sedlak
RD Chemical Company

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