[Healeys] Parkerizing

[Roland Wilhelmy]

Parkerizing is the finish put on government issue Colt .45 pistols and
other gear.  I do not believe that it had any effect on metal
ductility or strength.  It does not do a whole lot of protecting from
rust, however.  It does keep the metal from being reflective.  I would
have called it a medium grey color, not black or charcoal.

-Roland

On Wed, 11 Jul 2012 18:14:53 -0700, you wrote:

::I'm experimenting with Parkerizing, a process similar to Curt Arndt' s
::chemical bluing process for coloring and protecting steel parts from
::rust.
::Parkerizing turns steel to a dark gray/black color in a solution of
::phosphoric acid and manganese at a temp of about 200 degrees to create
::a rust-protective coating.
::
::Is there any reason to think this would make hardened suspension
::fasteners brittle?
::Thanks for your thoughts,
::Charlie