An Improved Manufacture of Anti-corrosive Compound.
Year: 1890

page_text: Date of Application, 9th Apr., 1890-Accepted, 31st May, 1890
COMPLETE SPECIFICATION.
An Improved Manufacture of Anti-corrosive Compound.
I DAVID FULTON of 1 St. James Square in the City of Manchester Fel. Inst. P.A.,
Assoc. Mem. Inst. C.E., do hereby declare the nature of this invention (communicated
to me from abroad by David Frank Schmid of 707 North Central Avenue,
Baltimore, State of Maryland U.S.A.) and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:
The said invention relates to the manufacture of an anti-corrosive liquid compound,
which may be readily applied by a brush or sponge to the surface of any metallic
body or substance and thereby render this surface proof against the ordinary
corrosive action of acids and other like deteriorating agencies; the compound being
of equal benefit in the preservation of wood from the deteriorating influences of
soil or water.
The particular process of manufacturing the compound which consists in the
employment of cotton-seed oil and pure lead; being such that the cotton seed oil is
caused to absorb and combine therewith such quantity of the lead that an oil of a
mineral nature is produced, which, in itself, will be non-corrosive and of such
adhesiveness as to adhere perfectly to the surfaces covered therewith and which will
become sufficiently hardened thereon to resist any ordinary abrasion and thus protect
these surfaces from any exterior corrosive influences.
The particular manner of preparing and using the compound being as follows:
In practice where large quantities of the compound are to be manufactured the
relative parts thereof are in due proportion. For an easier comprehension of the
operation and the proportion of parts employed in the preparation of the compound,
there are employed in the following description the smallest quantities that can be
handled with advantage.
In a suitable metallic vessel of something more than one gallon in capacity is
placed one gallon of pure cotton seed oil; there is now melted in a furnace, in a
suitable crucible or ladle, twenty (20) pounds of pure lead metal, care being taken
that the entire quantity of the lead is in the molten state which will insure a
temperature thereof of not less than 504 degrees of heat Far.; in this molten state
the lead is then poured gradually in the one gallon of cotton seed oil, care being
taken that the mixture is well stirred during the process of pouring, in order
that, as far as possible, each molecule of the molten lead will be exposed to the
action of the cotton-seed oil. In this process of pouring the molten lead, as soon as
the hot and molten metal strikes the surface of the oil, it follows the law common to
all molten metal when thrown in a liquid, and separates into very minute globules,
the bright and pure surfaces of which are brought in immediate contact with the
cotton-seed oil and by the heat therefrom impart such affinity to the cotton-seed oil
in immediate contact therewith that a certain part of the lead will be absorbed by the
cotton seed oil which, when removed from the influence of the heated globule of
lead, will immediately cool sufficient to retain therein the lead thus absorbed. When
the entire twenty pounds of molten lead have been thus poured in the gallon of
cotton seed oil, it is allowed to remain some little time to cool off, after which the
oil is drawn off and there will be found remaining in the-bottoin of the vessel, in
various forms about seventeen pounds of the pure lead, thus showing that in this
one process of pouring that about three pounds of lead have been absorbed by the
one gallon of cotton seed oil. This remaining 17 pounds of lead is now removed
from the vessel and the gallon of cotton seed oil that has now about 3 pounds of
lead therein is returned to the vessel; the remaining 17 pounds of pure lead is again
heated and brought to the molten state in which condition it is again poured in the
cotton-seed oil contained in the vessel, the same care being observed in stirring the
CD 1.77

page_text: mixture during the process of pouring as in the first pouring of the metal; after
this second process of pouring the molten lead in the cotton seed oil, the mixture
is allowed to cool sufficiently when the oil is again drawn from the vessel, and there
will now be found remaining about fifteen pounds of pure lead; thus showing that
in this second process of pouring the molten metal that two pounds of lead additional
have been absorbed by the cotton seed oil which will now contain about five pounds
of lead combined therewith. This process of re-melting the remaining lead and
again pouring and mixing it with the same cotton seed oil is continued with
advantage up to the fifth time of pouring the molten metal after which the cotton
seed oil will be found to have absorbed about ten pounds of the lead and after which
there seems to be no further affinity of the oil for the metal. After the cotton seed
oil has been brought to this stage it is allowed to thoroughly cool when its
consistency will be about that of ordinary paint. The compound is now in condition
to be applied to those surfaces that it is desired to protect against corrosive or
deteriorating influences, and may be applied with a sponge or brush as in the
application of ordinary paint. In applying the compound its adhesiveness will cause
it to adhere tightly to the surface coated therewith. It is preferred to apply one
coat and then allow it to remain about 48 hours during which time it will have
become sufficiently hard to resist any ordinary abrasion and after which a second
coat may be applied with advantage.
It has been found in practice that no other of the known oils, other than cotton
seed oil, possesses the quality of absorbing the lead when treated as herein described;
and that the cotton seed oil possesses the quality of absorbing certain proportions of
other metals when poured therein in the molten state in the manner herein described.
It is not strictly necessary that the exact proportions of cotton seed oil and lead
herein stated shall be employed, as these quantities will admit of some variation,
though practice has proven that the proportions herein specified give the best
results.
As stated the compound may be employed to protect metallic surfaces of any
kind, and it is particularly useful for coating the bottoms of iron or steel ships, to
protect the surface thereof from rust and the adherence thereto of barnacles and
other marine life. It is likewise of equal benefit for the protection of wooden
surfaces that are to be buried in the earth or exposed to the action of water, such
as fenre, posts, piles etc.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In the manufacture of an anti-corrosive compound, the process of melting pure
metallic lead, and then mixing the said lead in its molten state with any quantity
of cotton seed oil whereby the action of heat therefrom will cause the said cotton
seed oil to absorb some part of the said lead the process of remelting and again
pouring the said lead in the said cotton seed oil being repeated a sufficient
number of times until the said cotton seed oil has absorbed the desired quantity
of the said lead for the purpose set forth.
Dated this 8th day of April 1890
DUTTON & FULTON,
1, St. James Square, Manchester, Agents