Improved Processes for Coating Aluminium or other Metals with Nickel or other Metals.
Year: 1897

page_text: Improved Processes for Coating Aluminium or other Metals with
Nickel or other Metals.
We, GASTON WEIL, ERNEST QUINTAINE, and CLEMENT LEPSCH, all in Paris, 24, Rue
St. Lazare, being all three Chemists, do hereby declare the nature of this invention
to be as follows:-
The nickelling, cobalting, gilding, silvering coppering &c. of aluminium or of
any other metal by adding to a bath of a double sulphate of nickel and ammonia or
any other nickel simple, double or complex salt or any other bath of gilding,
cobalting, silvering, coppering &c., one or several productions belonging to the
class of hydrates of carbon & especially to the class of saccharoses (cane sugar
inversed or not), lactose, maltose &c.; said bath may be used either warm or
cold.
The plating of aluminium with nickel, cobalt, silver, gold, copper &c., by means
of a previous nickelling, cobalting, silvering gilding, coppering &c. terminated by
annealing in a close vessel and rolling if required.
The process of which we claim the property concerns the nickelling gilding &
silvering &c. of aluminium; however we intend to apply the same process for
nickelling any other metal and therefore we reserve to ourselves the entire
property thereof.
It is known that it is impossible to nickel aluminium in baths prepared according
to the several formules generally used for nickelling metals. Now by adding to
the nickel baths already known an organic production belonging to the class of
bydrates of carbon Co(H2 o)" and more especially to the class of saccharoses C12(H20)11,
cane sugar (before or after inversion) lactose, maltose &c. &c. we succeeded in
getting a perfect nickelling of aluminium, the latter having previously undergone
all required operations of chemical & mechanical scouring. We make use of a cold
or warm bath as we deem convenient.
And we intend to reserve to ourselves the use of the same productions for any other
metallization of aluminium or of whatever metal and more especially for the gilding
& silvering of aluminium which we obtain either directly upon aluminium metal or
on a first coating of nickel laid upon aluminium as above described, which gilding
and silvering may be obtained by dipping the nickelled aluminium in any gilding
or silvering bath (simple dipping process without batteries or working through an
electric current). Moreover we will now describe a means of obtaining nickel
plating, which shall remain our own property:
The aluminium or other metal plate or manufactured articles intended to be
nickel plated shall be nickelled in a bath to which has been added one of the
products, of which we claim the use.

page_text: It is well understood that the above stated composition of bath is given by us as
an example only and we reserve to change the proportions of the composition in
the limits of the present application.
At
As soon as the nickel is about half a mm. thick, the article is taken out of
the bath, dried and put into a vessel made of cast-iron; this vessel is closed
very tightly by luting carefully the top. This vessel is put into a furnace where
is heated progressively to red heat; this operation lasts from 7 to 8 hours.
the end of that time the vessel is taken out of that furnace and left to cool in
the open air. Afterwards the vessel is opened and the article taken out, only
when quite cold. In case of aluminium plates it shall be rolled.
In short we claim as our own invention:
10. The nickelling of aluminium or of any other metal by adding to a bath
of double sulphate of nickel and ammonia or any other nickel simple, double
or complex salt, one or several productions belonging to the class of
hydrates of carbone and especially to the class of saccharoses cane-sugar
(inversed or not), lactose, maltose &c.; said bath may be used either warm or
cold.
2. The use of the same class of productions for cobalting gilding, silvering
and coppering aluminium (or any other metal) by adding one or more of
said productions to any bath, even known of cobalting, gilding, silvering
coppering &c.
30. The process of gilding and silvering aluminium by covering it first with a
nickel or copper coating as stated in the above described bath, then carrying the
aluminium thus nickelled or coppered to any gilding or silvering bath working
through simple dipping process or by means of an electric current.
4°. The plating of aluminium with nickel by means of a previous nickelling
terminated by annealing in a close vessel and rolling if required.
50. The plating of aluminium with any other metal by operating with the latter
as with nickel whether the metal was laid on the aluminium directly or indirectly
and as above described for the several metallizations.
1007
Improved Processes for Coating Aluminium or other Metals with
Nickel or other Metals.
We, GASTON WEIL, ERNEST QUINTAINE, and CLEMENT LEPSCH, all of 24, Rue
St. Lazare, Paris, in the Republic of France, 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 :-
This invention relates to improved processes in electro plating, and has for its
object the coating of aluminium with nickel cobalt, gold, silver or copper; the
process being also applicable to the coating of other metals.

page_text: It is known that it is impossible to obtain satisfactory results in the electro
deposition of nickel on aluminium by the use of baths prepared according to the
formulas generally use 1 for coating other metals, and our improved processes con-
sist first in the preparation and employment of a bath so as to obtain a perfect
coating of nickel or cobalt and secondly in the composition, and employment of
baths for gilding silvering or coppering aluminium by the addition in each case to
a bath composed of metallic and alkali salts of a definite organic production
belonging to the class of hydrates of carbon.
T
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page_text: This bath is preferably employed cold.
In each case the article to be coated is prepared and treated in the manner
customary in the electro-plating art.
The lactose may in each case be replaced by a like quantity of maltose, raffinose
or melezitose, and the baths may be used alkaline or rendered either acid or neutral
by the addition of a mineral acid such as nitric acid.
The quantities given of the various components of the baths are those we have
found to yield the best results in practice, but we do not restrict ourselves to the
exact proportions mentioned.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what we
claim is
In the electro deposition of nickel cobalt gold silver or copper on aluminium or
other metals the employment of baths composed substantially of the ingredients
and in the proportions specified.