A Process for Protecting Iron Pipes from Corrosion by Passage of Electrolysed Chloride Solutions employed as Disinfectants.
Year: 1894

page_text: Date of Application, 31st Mar., 1894
Complete Specification Left, 30th Jan., 1895-Accepted, 2nd Mar., 1895
PROVISIONAL SPECIFICATION.
A Process for Protecting Iron Pipes from Corrosion by Passage of
Electrolysed Chloride Solutions employed as Disinfectants.
We, EUGENE HERMITE, EDWARD JAMES PATERSON and CHARLES FRIEND
COOPER, all of Pownall Road, Dalston, in the County of Middlesex, Electrical
Engineers, do hereby declare the nature of this invention to be as follows:-
This invention relates to means of protecting iron pipes from corrosion by
passage through them of electrolysed chloride solutions such as are employed for
disinfecting and like purposes.
The protection is effected by immersing the pipes in a solution of magnesium
chloride, connecting them to the negative terminal and connecting the solution to
the positive terminal of a source of electricity. By electrolytic action the solution
in contact with the pipes becomes decomposed depositing on the surface of the
pipes a layer of magnesia which protects them from the action of electrolysed
chloride solution. Pipes already placed may be thus internally coated by con-
necting them at several points to the negative terminal of a source of electricity
while a solution of magnesium chloride connected to the positive terminal is passed
through the pipes.
Dated this 31st day of March 1894.
ABEL & IMRAY,
Agents for the Applicants.
A Process for Protecting Iron Pipes from Corrosion by Passage of
Electrolysed Chloride Solutions employed as Disinfectants.
We, EUGENE HERMITE, EDWARD JAMES PATERSON and CHARLES FRIEND
COOPER, all of Pownall Road, Dalston, in the County of Middlesex, Electrical
Engineers 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 :-
This invention relates to means of protecting iron pipes from corrosion by passage
through them of electrolysed chloride solutions such as are employed for disinfecting
and like purposes.
The protection is effected by immersing the pipes in a solution of a chloride of
an alkali or alkaline earth, connecting them to the negative terminal and connecting
a suitable electrode in the solution to the positive terminal of a source of electricity.
By electrolytic action the solution in contact with the pipes becomes decomposed
depositing on the surface of the pipes a layer of alkaline oxide which protects them
from the action of electrolysed chloride solution.
Pipes already placed may be thus internally coated by connecting them at
several points to the negative terminal of a source of electricity while the solution
of chloride connected by an electrode to the positive terminal is passed through the
nines.

page_text: Having now particularly described 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 :
The herein described process for protecting iron pipes from corrosion by passage
of electrolysed chloride solutions through them, by subjecting them to electrolytic
action while in contact with a solution of chloride.
20th den of Ton 1805
ABEL & IMRAY,
Agents for the Applicants.