ZINC PHOSPHATE PARKERIZING
Parkerizing is a great way to protect your home made tools gadets etc from weather and wear (remember nothing gives 100% protection from neglect but it will slow the effects of exposure to rough conditions)
Phosphoric acid can be bought as a primer for bare metal. It is sold under the names
Ospho, Metal Prep, and Ph-ospho-ric and is a greenish liquid.
US FOLK Take 4 pennies, dated
1990 or later and drill small holes in them. US Pennies before this date are made of copper
and will not work!
Aussies Use the post 2002 or newer 20 cent peices UK FOLKS buggered if i know sorry
Heat up 8 oz. of the phosphoric acid in a microwaveable beaker or
cup. Drop the zinc disks (pennies, 2 bob bits etc) into the hot phosphoric acid. The coins will start
fizzing and leave them in for about 5 minutes. Remove the pennies from the acid.
SLOWLY transfer the liquid acid solution to a stainless steel container already containing
24 ozs of distilled water, and heat the solution up close to 190 degrees fahrenheit. Add
whatever steel object you want to parkerize and wait 10 20 minutes, depending on the
type of coating you are after. Experiment for different results.
NOTE: ALWAYS add acid to water, not water to acid, in order to prevent serious injury!
( it can jump back out at you faster than it went in!!!!)
cheers
jack
Parkerizing is a great way to protect your home made tools gadets etc from weather and wear (remember nothing gives 100% protection from neglect but it will slow the effects of exposure to rough conditions)
Phosphoric acid can be bought as a primer for bare metal. It is sold under the names
Ospho, Metal Prep, and Ph-ospho-ric and is a greenish liquid.
US FOLK Take 4 pennies, dated
1990 or later and drill small holes in them. US Pennies before this date are made of copper
and will not work!
Aussies Use the post 2002 or newer 20 cent peices UK FOLKS buggered if i know sorry
Heat up 8 oz. of the phosphoric acid in a microwaveable beaker or
cup. Drop the zinc disks (pennies, 2 bob bits etc) into the hot phosphoric acid. The coins will start
fizzing and leave them in for about 5 minutes. Remove the pennies from the acid.
SLOWLY transfer the liquid acid solution to a stainless steel container already containing
24 ozs of distilled water, and heat the solution up close to 190 degrees fahrenheit. Add
whatever steel object you want to parkerize and wait 10 20 minutes, depending on the
type of coating you are after. Experiment for different results.
NOTE: ALWAYS add acid to water, not water to acid, in order to prevent serious injury!
( it can jump back out at you faster than it went in!!!!)
cheers
jack