ASTM B141-58

Specification for Electrodeposited Coatings of Nickel and Chromium on Copper and Copper-Base Alloys (Withdrawn 1966)

General Information

• Status: Withdrawn
• Technical Committee: B08 - Metallic and Inorganic Coatings
• Drafting Committee: B08.02 - Pre Treatment

Standards Content (Sample)

Standard Speci.fi. cations fo.r
ELECTRODEPOSITED COATIN.GS OF NICKEL AND
1
CHROMIUM ON . .COPPER AND COPPER-BASE ALLOYS
ASTM Designation: B 141:. 58 .
2
ADOPTED, 1945; REVISED, 1955, 1958.
This Standattl of the Amedcan Society for Testing Materials is issued under
the. fixed designation EJ41; the final number .indicates the y,ear of original .
adpption as standard or, in the case of revision, the year oflast revision.
. .
These_ specifications were prepared jointly by the Ameri~a~ Electroplaters' Society, the
, , N, ationaJ Bur~au of Standards, and the American Society for Testing lvI aterials.
NOTE 2: Explanation of Symbols.-The initial
Scop~ .··· ·.·
letters, F, K, and Q were adopted as arbitrary
L These specificatiOns cover require­
designations of grades ·of plating. The second
ments for electroplated coatings on
letter ·C refers .to copper. as the.·basis 'metal;
other basis 'metals' are indicated by the letters
copper articles (Note 1) including; a
B for brass, S for steel, and Z for :zinc; •
'final Coating of nickel ot chroiriiµm ,where
NOTE 3: Classification.-The conditions of
both appearance and protection against
expps\iie ~~d tl~e olJ~!_a\e corrosion of the basis metal are im~
that it is not possible to'predidt the average life
j)Or~ant. Thre<:! ~yp~s of coating (Notes
of artkles pfated,:lit acco.l'ifa!lce .W;ith type. FC,
2 and 3) .are covered: namely,
type KC, or type QC, or to predetermine just
which type of plating should'· be specified for a
. Type[?C,
given article. Such a seleetioii'ril.usdie based
'" Type KC, ~nd
1
1lpon the experi~r)ce •pf . the 'rrianufactufers and
TypeQC . .
the. iisers. · · ·· ·· " · , · · ·. •. · . •. · ·.· .
NoTE 1.-,-In these specifications the. ·term
It is recognized. that uses exist for w:hich
"copper" is used, fm; brevity,.to. inclu(le copper
thicker coatings than those 'of type RC will be
and alloys containing SO ·per cent o.r ;more of
required.
copper.
For articles that are intended foi:. a ,short
period of . 11Se,. no· standard specificati(:m .• for
1 Under the standardization procedure of the
plating is recommenqed. It is suggestet:i;;J).~w­
ASTM, these specifications ar.e under the juris­
diOtioii of the ASTM Committee B-8 on Electro­
ever, that subject to the prevailing manufactur­
deposited Metallfo Qoa.tings. ·
ing conditions, certain minimum refluiremeµts
· ii Accepted by the Societies, June, 195.8.
be agreed upon 'by the niah1.lfacturer. alld ··the
Prior to adoptiOn' as st'aildard, these specifica­
purchaser in order fo insure· that the . pl:ited
tions wei'e published.•as tentative from 1941 to
coatings render a useful .service. .
.1945, bfling revised in 1Q4;5.'.
937
8-99

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938 SPECI:FICATIONS FOR ELECTRODEPOSITED COATINGS ON COPPER (B 141 - 58)
Manufacture Significant Surfaces
2. The copper to be plated shall be 4. In general, significant surfaces
substantially free from flaws or defects (Note 4) are those surfaces that are visi­
that will be detrimental to the final ble and subject to wear or corrosion or
finish. It shall be subjected to such both, or surfaces on which the coating is
polishing, cleaning, dipping, an'i;b plat\ng otherwise furrcfionally necessary. The
procedures .as are necessary to. yield
designation of significant surfaces shall be
deposits with the desired appearance
agreed upon by the manufacturer and the
and quality. The use of copper as an
purchaser and may be indicated on the
initial layer is optional, but does not drawings. Surfaces on which a controlled
affect the required thickness of nickel or deposit ordinarily cannot be obtained,
chromium. The coatings shall have a such as holes, recesses, bases of angles,
bright or dull finish as specified, shall and similar areas, are normally exempt
be adherent and free from blisters, from the requirements for significant
and substantially free from pits or other surfaces, urrl.ess they are specifically
surface defects. za designated as such. When such areas are
designated as significant surfaces, and
Thickness of Coatings
the thickness requirements must be met,
the manufacturer and the purchaser shall
3. Coatings on the finished articles
recognize the necessity for either thicker
shall conform to the following require.:.
deposits on the more accessible surfaces
ments as to thickness on significant sur­
or for special racking. Special racks may
faces:
involve the use of conforming, auxiliary,
interior, or bi-polar electrodes.
Thickness of Coating/ in.
NOTE 4.-It is suggested that significant sur­
Type FC Type KC Type QC
faces gene~ally may be defined as those parts of
the visible surface that can be.touched with a
Nfckel,a min . 0. 00050 0. 00030 0; 00010
£-in. diameter spher.e . or with a sphere of a
(13µ) (7. 6µ) . (2. 5µ)
diameter agreed upon by the manufacturer and
Chromium . (if
the purchaser. '
req
...