I`ve been messing with this for a while now and I think I`ve stumbled onto something that will give good results.
Parkerizing is a manganese phosphate coating,you can either buy the chemicals from Brownells or if you`re like me mix them yourself,I had been planing on buying some powdered manganese dioxide from a pottery supply house,but when I got ready to place the order I was struck by an idea.......zinc phosphate can also be used to parkerize....where can one get zinc?......look between your couch cushions....see those pennies? not copper anymore.Theyre copper plated zinc!I`m not sure when the mints quit making all copper pennies but I know anything since at least 1990 is copper plated zinc.I sanded the copper off 4 pennies till I had disks of zinc,heated up 8 oz. of phosphoric acid in a measuring cup in the microwave(phosphoric acid can be bought at home depot,it`s sold as a primer for bare metal it`s usually called ospho or ph-ospho-ric a green liquid,about $8 a gallon)then I dropped the zinc disks into the hot liquid,they fizzed like alka-seltzer for about 5 minutes then I pulled the zinc out.I added another 24 oz. of tap water,poured the mixture into a pyrex baking pan and heated it in the microwave until it was just starting to boil.I placed a clean grease free sandblasted knife blade into the liquid and waited 10 minutes,it came out a beautiful dark matte black.I washed it off in scalding water let it dry then immediately oiled it.This is just the experimental stage of this proccess,I`ll be trying different amounts of acid/water and zinc/acid and the ratio may yield different results if altered,I`ll be trying that.Anyway I just wanted to share the result of my tinkering with you,I`m quite pleased.
Bossman