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Патент USA US2133845

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; Patented Oct. 18,1938~
' UNITED STATES
_
2,133,845
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V
CORROSION RESISTANT room ARTICLE ‘ .
Donald K. Crampton, Marion, and Newell W.
, Mitchell, Waterbury, Conn., assignors to Chase
Brass a Copper (30., Incorporated, Waterbury,
Conn., a corporation of Connecticut j
No Drawing.
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Application March 30, 1936,
_ Seria1N0.71,806“
6 Claims. (01. 138-47)
the second having about 1% phosphorus, about
This invention relates to improvements in cor
rosion-resistant tubular articles, and more par
ticularly, corrosion-resistant wrought-metal tu
bular articles formed of copper-base alloys con-_
5 taining phosphorus, aluminum and tin, with or
1% aluminum and about 2% tin, and the third
having about 1% phosphorus, about 11/2% alu—
minum and about 11/2% tin.
speci?c ways than those herein set forth without
departing from the spiritv and essential char- 1 1.
made of copper-base alloys containing phosphor
acteristics of the invention, and the present em-
additional elements in such substantial-innocu
ous amounts as do not seriously impair the prop—
erties of the alloy, have valuable corrosion-re
2 O sistant properties, especially when in contact with
saline liquid or dilute acid.
all'changes coming within the‘ meaning and
'
25 elements, iron, antimony and arsenic should not
be present much in excess of about 0.1%, silver,
which is comparatively innocuous, may be pres
ent to as high as about 10% provided not too
much of other elements is present. Nickel may
3° be present to as high as about 5%, and lead and
silicon may each be present to ashigh as about
3%-
.
o
claim:
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contact with ,saline‘ liquid or dilute acid " and ‘
characterized by good corrosion resistance to .
saline liquid and‘dilute acid, and formed‘ from an»
alloy containing: phosphorus as an essential ele
ment iromjabout 1/4‘%' toabout 2%; aluminum 20
The additional ele- ‘ from about 14% toabout 4%; tin from about U
merits may range up to a total of about 10%, de
pending on what elements are added, some being
more innocuous than others. While each of the
50
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us from about 1/;% to about 2%, aluminum from equivalency rangeof the appended claims are,
about 1/;% to about 4%, tin from about 1/2% to intended to be embraced therein.
about 31,’2%, and copper, the copper, phosphorus,
aluminum and tin constituting about 90% or
1. A wrought-metal tubulararticle for use in 15
more of the alloy, with or without one or more
45
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bodiments are therefore vto be considered in all.
respects as illustrative and not restrictive,‘ and 10, 7' ,
We
40
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ments which do not seriously impair the prop;
erties of the alloy.
10 articles, such, for example, as tubes, pipes, etc.,
35
.
without the addition of one or more other ele
We have found that wrought-metal tubular
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The invention maybe carried out in other 5
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of
copper._
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2. A wrought-metal ‘tubular article for use in
contact with saline liquid or dilute acid'and char- 25
acterized by good corrosion resistance to saline’
liquid and dilute acid and formed from an alloy
containing: phosphorus as an essential element
from about 1A% to about 2%;. aluminum from
about 14% to about 4%; tin from about -1/2% to 30
about 3%%; the sum of the phosphorus, alumi-.
num and‘tin being not greater than-7.5%; and
In order that our improved alloys may be the balance substantially ofvcopper.v
,
wrought to make tubular articles such, for ex
3. Avwrought-metal tubular article for use‘in'
ample, as tubes, pipes, etc., for conveying or contact with saline liquid or dilute acid and
holding or otherwise contacting corrosive liquids, characterized by good corrosion resistance to
the total of the phosphorus, aluminum and tin saline liquid and-dilute acid and formed from an
preferably should not be greater than about alloy, containing: phosphorus as an essential
71/2%, with the phosphorus from about 1/4% to element from ‘about 1/2% to about 11/2%; aluabout 2%, the aluminum from about 1/4% to minum from about V1/2% to about 3%; tin from
about 4%, and the tin from about 1/2% to about about 1% to about 3%; and the balance sub
31/2%. Stillbetter workability of the metal is v stantially of copper.
had when the total of the phosphorus, aluminum
4. A wrought-metal tubular article for 'use in
and tin does not exceed about 51/2%, with the contact with saline liquid on dilute acid and
phosphorus from about 1/4% to about 1'1/2%.' the characterized by good corrosion resistance to
aluminum from about 1A% to about'3%, andthe saline liquid and dilute acid and formed from an
tin from about I/2% to‘ about 2%.
alloy containing: phosphorusas an‘ essential ele
An advantageous alloy range consists in hav
ment about %%; aluminum, about 3/4,%; tin
ing the phosphorus from about. 1/2% to about " about"3%; and the balance substantially of cop
11/2%, the aluminum from about 1/2% to about
3% and the tin from about 1% to about 3%.
5. A wrought-metal‘ tubular article for. use in
And within this range three alloys may be ad
contact with saline liquid or‘dilute acid and charpen
vantageously made having nominal composition
as follows: the ?rst having about %% phos
.
to about 3%; and the balance substantially ' - I ”
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p
,
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,
35
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45}
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acterized by good corrosion resistance to saline I’
liquid and dilute acid and formed from an ‘alloy 7
55 phorus, about 74% aluminum and about 3% tin, 1 containing: phosphorus as an essential element
o
2‘
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2,188,846
about 1%;- aluminum about 1%; tin about 2%;
alloy containing: phosphorusas an essential‘ele
and the balance substantially of copper.
; ment about 1%; aluminum about 115%; tin
6. A wrought-metal tubular article for use in about 11/2%; and the balance substantially of
contact with saline liquid or dilute acid and
copper.
-
characterized by good corrosion resistance to
saline liquid and dilute acid and formed from an
DONALD K. CRAMPTON.
7
NEWELL W. MITCHELL.
5
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