AN IMPROVED ANTI-CORROSIVE PAINT; ALSO APPLICABLE IN THE MANUFACTURE OF ANTI-CORROSIVE WRAPPINGS
Year: 1882

page_text: LETTERS PATENT to Albert Riegelmann, of Hanau, Prussia, German Empire,
for an Invention of "AN IMPROVED ANTI-CORROSIVE PAINT; ALSO APPLICABLE
IN THE MANUFACTURE OF ANTI-CORROSIVE WRAPPINGS."
PROVISIONAL SPECIFICATION left by the said Albert Riegelmann at the
Office of the Commissioners of Patents on the 9th February 1882.
ALBERT RIEGELMANN of Hanau Prussia German Empire. "AN IMPROVED
ANTI-CORROSIVE PAINT ALSO APPLICABLE IN THE MANUFACTURE OF ANTI-
CORROSIVE WRAPPINGS."
It is a well known fact that the ordinary oil-paints afford comparatively speaking
but slight protection against corrosion to iron and other easily oxidizable metals,
as on the one hand such paints do not sufficiently keep off atmospheric influences
and on the other hand the paints themselves generally contain freo acids or
gradually form the same and these cause the metal to rust underneath the paint so
that a continuously extending corrosion takes place under the paint.
Now the object of this Invention is the manufacture of various kinds of paint
(and also of anti-corrosive wrappings or packing materials) which have alkaline
reaction and remain alkaline, by adding to paint one or several of the alkaline
earths such as lime, magnesia, (dolomite) baryta, and strontium, in a caustic and
anhydrous state.
These substances are added cold to the ordinary oil-colours so that saponification
can take place in a very small degree only and thus a constant alkaline reaction
of the coat of paint remains to keep off the carbonic acid and other acid gases as
well as the dainpuess of the atmosphere from the metal, and thus to prevent
rusting. By the added alkaline substances not only all free acid present in the
paint is neutralized but free alkali remains in excess so as to act as an anti-
corrosive. The maintainence of the alkaline reaction is further promoted by the
incorporation of the alkaline earths with the paint when the former are occluded in
hydrocarbons such as mineral oil or paraffine.
The anti-corrosive material will therefore be compounded according to the
purpose for which it is to be used for instance as follows.

page_text: For providing iron and other metals with a fixed coat of paint to protect the
same against oxidation in the open air, the ordinary paint (consisting generally of
boiled linseed oil to which heavy oxides of metal or the like are added) is used
about 10 per cent. of calcined magnesia, baryta or strontium being added when
cold; this addition having previously been rubbed up with an equal quantity, by
weight of light mineral oil.
To keep iron and other metals free from rust when in the ground and in contact
with moisture (for instance supply pipes the iron of permanent ways of railways,
water reservoirs, ship's bottoms and cetera) the following preparation is used.
Melt 100 parts of resin and 25 parts guttapercha in 50 parts of paraffine, the
resinous mass thus obtained is then attenuated to the consistency of paint by
inineral oil and to this 20 parts of calcined magnesia are added cold. Instead of
magnesia an equal quantity of caustic baryta may be added. After the addition
of the magnesin etcetera the mass, which has become too thick is again attenuated
by mineral oil till it is capable of being spread by the brush.
For storing bright pieces of machinery or other bodies of iron or steel and to
protect the same against rust during transport the anti-corrosive is produced in
such a state that it can easily be wiped off again from the metal surfaces; it
must therefore not dry in this case. To this end the paint is made from vasoline
(petroleum-jelly) or from heavy mineral oils 20 to 30 parts of calcined magnesia
being added to 100 of the said substances. If said paint is to serve for a short
time only then the same quantity of calcined marble-lime (marmorkalk) or dolomite
may be added..
For packing or enveloping bright iron-work I use, where direct painting with
the mass last described is not feasible (as for instance with fine wire, small chains,
files etcetera) paper linen or cotton fabric or the like upon which the anti-corrosive
material last above described-is-applied-on-one-side-whilst_the_other_side_is_made_
water-proof by painting it with chromglue (chromleim).

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Albert Riegelmann in the Great Seal Patent Office on the
3rd August 1882.
ALBERT RIEGELMANN of Hanau Prussia, German Empire. "AN IMPROVED
ANTI-CORROSIVE PAINT ALSO APPLICABLE IN THE MANUFACTURE OF ANTI-
CORROSIVE WRAPPINGS."
It is a well known fact that the ordinary oil-paints afford comparatively speaking,
but slight protection against corrosion to iron and other easily oxidizable metals as,
on the one hand such paints do not sufficiently keep off atmospheric influencos and,
on the other hand, the paints themselves generally contain free acids or gradually
form the same and these cause the metal to rust underneath the paint so that a
continuously extending corrosion takes place under the paint.
Now the object of this Invention is the manufacture of various kinds of paint
(and also of anti corrosive wrappings or packing materials) which have alkaline
reaction, and remain alkaline, by adding to paint one or several of the alkaline
carths such as lime, magnesia (dolomite) baryta and strontium in a caustic and
anhydrous state.
These substances are added cold to the ordinary oil colours so that saponification
can take place in a very small degree only and thus a constant alkaline reaction of
the coat of paint remains to keep off the carbonic acid and other acid gases as well
as the dampness of the atmosphere from the metal and thus to prevent rusting.
By the added alkaline substances not only all free acid present in the paint is
neutralized but free alkali remains in excess so as to act as an anti-corrosive. The
maintainence of the alkaline reaction is further promoted by the incorporation of
the alkaline earths with the paint when the former are occluded in hydrocarbons
such as mineral oil or paraffine.
The anti-corrosive material will therefor be compounded, according to tho
purpose for which it is to be used, for instance as follows.
For providing iron and other metals with a fixed coat of paint to protect the
same against oxidation in the open air the ordinary paint (consisting generally of
boiled linseed oil to which heavy oxides of metal, or the like, are added) is used,
about 10 per cent. of calcined magnesia baryta or strontium being added thereto
when cold, this addition having previously been rubbed up with an equal quantity
by weight of mineral oil.
To keep iron and other metals free from rust when in the ground and in contact
with moisture (for instance supply pipes the iron of permanent ways of railways,
water reservoirs, ship's bottoms et cetera) the following preparation is used: Melt
100 parts of resin and 25 parts gutta percha in 50 parts of paraffine, the resinous
mass thus obtained is then attenuated to the consistency of paint by mineral oil
and to this 20 parts of calcined magnesia are added cold. Instead of magnesia an
equal quantity of caustic baryta may be added. After the addition of the
magnesia etcetera the mass which has become thick is again attenuated by mineral
oil till it is capable of being spread by the brush.
For storing bright pieces of machinery or other bodies of iron or steel and to
protect the same against rust during transport, the anticorrosive is produced in
such a state that it can easily be wiped off again from the metal surfaces; it must
therefore not dry in this case. To this end the paint is made of vasoline
(petroleum jelly) or from heavy mineral oils 20 to 30 parts of calcined magnesia
being added to 100 of said substances. If said paint is to serve for a short time
only then the same quantities of calcined marble (marmorkalk) or dolomite may be
added.

page_text: For packing or enveloping bright iron work I use where direct painting with
the last described mass is not feasible (as for instance with fine wire, small
chains, files etcetera), paper linen or cotton fabric, or the like upon which the
anticorrosive material last above described is applied on one side, whilst the other
side is made waterproof by painting it with chrome-glue (chromleim).
Having now described my said Invention and the manner of performing the
same, I wish it understood that what I claim and desire to protect under the
hereinbefore in part recited Letters Patent is :-
First: The process of manufacturing paints substantially in the manner set
forth especially the addition of caustic anhydrous alkaline earths in combination
with (occluded in) hydrocarbons such as mineral oils, paraffine) to the ordinary
known paints in such a manner that the caustic earths remain in as free a state
as possible that is to say cannot become much saponified.
Second: The manufacture of packing paper or fabric by coating paper or fabric
with the paint specified on one side and with chrome-glue (chromleim) on the other
substantially as set forth.
In witness whereof I the said Albert Riegelmann have hereunto set my hand
and seal this Twenty fifth day of July in the year of our Lord One
thousand eight hundred and eighty two.