Even the military nowadays show more quiet taste
than formerly and have abandoned their glittering accoutrements.
The phosphate bath is not expensive and can be used continuously for
months by adding more of the concentrated solution to keep up the
strength and removing the sludge that is precipitated. Besides the iron
the solution contains the phosphates of other metals such as calcium or
strontium, manganese, molybdenum, or tungsten, according to the
particular purpose. Since the phosphating solution does not act on
nickel it may be used on articles that have been partly nickel-plated so
there may be produced, for instance, a bright raised design against a
dull black background. Then, too, the surface left by the Parker process
is finely etched so it affords a good attachment for paint or enamel if
further protection is needed. Even if the enamel does crack, the iron
beneath is not so apt to rust and scale off the coating.
These, then, are some of the methods which are now being used to combat
our eternal enemy, the rust that doth corrupt.
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