Improvements in the Coating of Iron, Steel, Nickel, Zinc, or Tin for the Prevention of Corrosion.
Year: 1890

page_text: Date of Application, 25th Jan., 1890
Complete Specification Left, 24th Sept., 1890-Accepted, 20th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Coating of Iron, Steel, Nickel, Zinc, or Tin
for the Prevention of Corrosion.
We, ALEXANDER ELLIOT HASWELL and ARTHUR GEORGE HASWELL, both of
10, Theresianumgasse, Vienna, in the Empire of Austria, Chemists, do hereby declare
the nature of this invention to be as follows:-
According to the present invention an electric current is used for depositing on iron,
steel, nickel, tin or zinc an anti-corrosive coating or. patina consisting of a thin layer
of a metallic oxide, such as binoxide of manganese, sesquioxide of molybdenum, or
binoxide of lead.
The process of forming such coating is as follows,
The article to be coated is first well cleaned by means of any well known
methods usual in galvanic plating processes so as to be perfectly free from oxides and
fatty matters.
For the production of the coating of binoxide of manganese on iron, steel or nickel
the article is connected to the positive pole of the electric battery and inserted into a
bath containing in one hundred litres of water from fifty to a hundred grammes of
manganese in the form of either nitrate or sulphate of protoxide of manganese, and
from one to two kilogrammes of nitrate of ammonia.
For depositing the molybdenic coating or patina on iron, steel or nickel the bath
consists of one hundred litres of water containing one hundred grammes of molybdate
of ammonia and one to two kilogrammes of nitrate of ammonia. In this process the
article to be coated is connected to the negative pole of the battery.
For depositing the lead-binoxide coating or patina on iron, steel, zinc, tin or nickel,
the bath contains in one hundred litres of water one half to one kilogramme of nitrate
of lead and one to two kilogrammes of nitrate, of ammonia, and the article to be
coated is connected to the positive pole of the battery.
The electric current requisite for the above is comparatively weak and varies from
03 to 05 Amperes per square decimetre.
Dated this 95th day of January 1890
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in the Coating of Iron, Steel, Nickel, Zinc, or Tin
for the Prevention of Corrosion.
We, ALEXANDER ELLIOT HASWELL and ARTBUR GEORGE HASWELL, both of
10, Theresianumgasse, Vienna, in the Empire of Austria, Chemists, 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 :—
According to the present invention an electric current is used for depositing on
iron, steel, nickel, tin or zinc and ati-corrosive coating or patina consisting of a thin
layer of a metallic oxide, such as binoxide of manganese, sesquioxide of molybdenum,
or binoxide of lead.
The process of forming such coating is as follows.
The article to be coated is first well cleaned by means of any well known methods
usual in galvanic plating processes so as to be perfectly free from oxides and fatty
matters.
For the production of the coating of binoxide of manganese on iron, steel or

page_text: nickel the article is connected to the positive pole of the electric battery and inserted
into a bath containing in one hundred litres of water from fifty to a hundred grammes
of manganese in. the form of either nitrate or sulphate of protoxide of manganese,
and from one to two kilogrammes of nitrate of ammonia.
For depositing the molybdenic coating or patina on iron, steel or nickel the bath
consists of one hundred litres of water containing one hundred grammes of molybdate
of ammonia and one to two kilogrammes of nitrate of ammonia. In this process the
article to be coated is connected to the negative pole of the battery.
For depositing the lead-binoxide coating or patina on iron, steel, zine, tin or nickel.
the bath contains in one hundred litres of water one half to one kilogramme of nitrate
of lead and one to two kilogrammes of nitrate of ammonia, and the article to be
coated is connected to the positive pole of the battery.
The electric current requisite for the above is comparatively weak and varies from
0-3 to 0.5 Amperes per square decimetre.
Having now particularly describe and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
First. The coating of articles of iron, steel, tin, zinc, or nickel with an electro
deposit consisting of an anti-corrosive coating or patina of binoxide of manganese, or
binoxide of lead or sesquioxide of molybdenum.
Second. The process for electro-depositing binoxide of manganese or lead or
sesquioxide of molybdenum on the metals above mentioned substantially as described.
Third. The use of nitrate of ammonia as an ingredient of galvano-electric baths for
depositing a coating of the above named oxides on the above named metals.
Dated this 23rd day of September 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicants.