Year: 1886

page_text: Date of Application, 2nd Oct., 1886.
Complete Left, 28th June, 1887.
Complete Accepted. 29th July, 1887
I, JAMES BALLANTYNE HANNAY, of Cove Castle, Loch Long, in the County of
Dumbarton, North Britain, Chemist, do hereby declare the nature of this Invention
to be as follows, that is to say:-
My said Invention has for its object the preparation of improved coatings for ships'
bottoms and consists in combining certain metallic and other ingredients in a manner
to prevent the corrosion of steel, iron, or other metal by inducing in it a certain
electric condition. The same combination of ingredients is also unfavorable to marine
life and when desired its efficiency in preventing the adhesion of shellfish may be
increased as hereinafter explained.
In carrying out my Invention I combine powdered metallic zinc with suitable basic
metallic oxides and a suitable coating medium. The medium which I prefer to use.
comprises linseed oil (raw or boiled) rosin and mineral naphtha; but the other
ingredients may also be combined with other coating media.
A simple anticorrosive coating made according to my Invention comprises the
ingredients herein before referred to in about the following proportions, namely:
Linseed oil 20 parts, rosin 23 parts, mineral naphtha 24 parts, powdered metallic zinc
10 parts, a basic oxide or mixture of two or more basic oxides or hydrates such as
oxide of zinc, magnesia, oxide of iron or the like 23 parts. The proportion of
powdered zinc may be increased if found necessary. The presence of the metallic
zinc in the coating places the metal of the ship's bottom in an electro-negative state
in which it does not corrode.
To form what I term an electroid coating to which marine animals will not adhere
1 combine red oxide of mercury with the ingredients of the anticorrosive coating
herein before described, the several ingredients being taken in about the following
proportions, namely: linseed oil 17 parts, rosin 20 parts, mineral naphtha 20 parts,
powdered metallic zinc 9 parts, red oxide of mercury 13 parts and basic oxide
20 parts. This coating will derive its efficacy from the presence of metallic mercury
in fine powder due to electro-chemical action and the consequent gradual reduction of
the oxide.
1000
EDMUND HUNT,
Applicant's Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Preservative Coatings for Ships' Bottoms.
I, JAMES BALLANTYNE HANNAY, of Cove Castle, Loch Long, in the County of
Dumbarton, North Britain Chemist, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, that is to say :-
My said Invention has for its object the preparation of improved coatings for ships'
bottoms, and consists in combining certain metallic and other ingredients in a manner
to prevent the corrosion of steel, iron, or other metal by inducing in it a certain
electric condition. The same combination of ingredients is also unfavorable to marine
life and when desired its efficiency in preventing the adhesion of shellfish may be
increased as hereinafter explained.
In carrying out my Invention I combine powdered metallic zinc with suitable basic
metallic oxides and a suitable coating medium. The medium which I prefer to use
comprises linseed oil (raw or boiled), rosin, and mineral naphtha; but the other
ingredients may also be combined with other coating media.
A simple anticorrosive coating made according to my Invention comprises the
ingredients hereinbefore referred to in about the following proportions, namely:
Linseed oil 20 parts, rosin 23 parts, mineral naphtha 24 parts, powdered metallic
zinc 10 parts, a basic oxide or mixture of two or more basic oxides or hydrates such
as oxide of zinc, magnesia, oxide of iron or the like, 23 parts. The proportion of
powdered zinc may be increased if found necessary. The presence of the metallic
zinc in the coating places the metal of the ship's bottom in an electro-negative state
in which it does not corrode.
To form what I term an electroid coating to which marine animals will not adhere
I combine red oxide of mercury with the ingredients of the anticorrosive coating
hereinbefore described, the several ingredients being taken in about the following
proportions, namely: linseed oil 17 parts, rosin 20 parts, mineral naphtha 20 parts,
powdered metallic zinc 9 parts, red oxide of mercury 13 parts and basic oxide
20 parts. This coating will derive its efficacy from the presence of metallic mercury
in fine powder due to electro-chemical action and the consequent gradual reduction of
the oxide.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is
--
1. Combining powdered metallic zinc with suitable basic metallic oxides and a

page_text: suitable coating medium to form preservative coatings for ships' bottoms substantially
as herein before described.
I
2. Forming an anti-corrosive coating for ships' bottoms by combining linseed oil,
rosin, mineral naphtha, powdered metallic zinc, and oxide of zinc, or magnesia, or
oxide of iron, or other basic oxide or mixture of basic oxides, substantially as
herein before described.
3. Forming a preservative coating by combining red oxide of mercury with the
ingredients named in the second claim substantially as herein before described.
EDMUND HUNT,
Applicant's Agent.