bronze disease

So the site I keep going to has multiple spots for detecting from the 1700s to the present. There are at least three homes/barns (torn down with trash left) with lots of bottles on the surface (more recent but as early as 1910s). I went back to an area which I have found a couple 1700s suspected...

So I have dug some old bronze, copper, and brass items in marsh area as well as sodium rich areas. Many of them seem to develop bronze disease. I am in the process of soaking a bridal rosette and a clock part in a sesquicarbonate solution at the moment as well as some copper pieces. It is a mix...