ASTM B732-84(1993)e1

Standard Test Method for Evaluating the Corrosivity of Solder Fluxes for Copper Tubing Systems (Withdrawn 1998)

General Information

• Status: Withdrawn
• ICS: 25.160.50 - Brazing and soldering
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.06 - Methods of Test

Standards Content (Sample)

I IND-STD ASTM !3732-84 (R89) VALID NOTICE I, 47 - 9979978 0004805 T m
:
VALIDATION NOTICE 1 i =
NOTICE OF
22 February 1991 for '
VALIDATION
ASTM B732-84(R89) ;
24 February 1984 ';
:
ASTM B732-84(R89), adopted on 11 March 1986 has been reviewed and
determined to be current.
'6
Custodians:
Military Coordinating Activity: i
Army - MR
Army - MR
i
Navy - AS
Air Force - 11
.
DISTRIBUTION STATEMENT A Approved for public release: distribution unlimited. 1

ASTM B732 84 - 0759530 0529887 054 -
AMERICAN SOCIETY FOR TESTlNG AND MATERIALS
Designation: B 732 - 84 (Reapproved 1993)”
1916 Race St Philadelphia, Pa 19103
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
If not listed in the current combined index, will appear in tha next edition.
Standard Test Method for
Evaluating the Corrosivity of Solder Fluxes for Copper Tubing
Systems’
This standard is issued under the fixed designation B 732; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapprowl. A
superscript epsilon (0 indicates an editorial change since the last revision or reapproval.
(1 NOTE-Keywords were added editorially in October 1993.
of which are soldered. Solder-joint effkiency is dependent on
1. Scope
the effectiveness of the solder flux. Solder fluxes are em-
1.1 This test method describes an accelerated test to
ployed to remove residual traces of oxides, to promote
evaluate the corrosivity of solder fluxes (Refs l-5*) that are
wetting, and to protect the surfaces to be soldered from
used in the assembly of copper-tubing system joints. The test
oxidation during heating. Because fluxes must be chemically
involves exposure of copper tube half-sections with pre-
reactive, they should be used sparingly on cleaned surfaces to
positioned flux to a controlled elevated temperature/
facilitiate rapid soldering. Excessive amounts may lead to
humidity environment.
continuing corrosive action (to a point of total destruction)
NOTE I-Various fluxes may behave differently to temperature from
long after the joint has been completed.
the corrosion standpoint. The ideal test must incorporate a spectrum of
temperatures ranging from overheated, resulting in charring, to slightly
warmed, which is insufficient to melt the flux. Attack may occur either 4. Apparatus
under the flux puddle or at its periphery with pitting being the dominant
4.1 Syringe-A removable plunger 1 mL minimum
mode of attack. The attack has been observed extending as far as 12 in.
volume syringe is required.
(300 mm) from the joint in a “II” or “v” shaped flux puddle in
4.2 Bunsen Burner, standard 13 mm with temperature-
horizontal tube failures. This test procedure is designed to produce a
monitoring capability.
temperature spectrum on a single specimen to facilitate speed of testing.
4.3 Adjustable Stand with a 2 to 3’ incline.
1.2 This test method is the product of a laboratory study
4.4 Stereomicroscope.
designed to investigate the role of fluxes in the corrosion
4.5 Humidity Cabinet capable of 90 % humidity at 40 to
failure of plumbed systems.
60°C (104 to 14o’F).
1.3 The values stated in inch-pound units are to be
regarded as the standard. The values given in parentheses are
5. Test Specimen
for information only.
1.4 This standard does not purport to address all of the
5.1 The test specimen shall be 314 in. nominal size (see
safety problems, if any, associated with its use. It is the
Note 2), H temper (drawn), Type M copper water tube
responsibility of the user of this standard to establish appro-
(Specification B 88). The specimen shall be approximately
priate safety and health practices and determine the applica-
12 in. (300 mm) long and cut length wise along the equator.
bility of regulatory limitations prior to use. For specific
The saw cut is approximate. The cut edge must be smooth
hazards, see 6.7.
enough to glide a syringe barrel along while applying flux.
No coolant shall be used during cutting. No subsequent
2. Referenced Documents
cleaning of the specimen is permitted prior to testing.
2.1 The following documents of the issue in effect on the
NATE 2-Alternatively, the test specimen shall be 22 mm nominal
date of material purchase form a part of this specification to
size, H temper (drawn), Type C copper water tube (Specification
the extent referenced herein:
B 88M).
2.1.1 ASTM Standards:
B 88 Specification for Seamless Copper Water Tube3
6. Procedure
B 88M Specification for Seamless Copper Water Tube
6.1 Fill the syringe with an appropriate flux by means of a
[MetricI
vacuum pump as shown in Fig. 1.
6.2 Disperse flux from the syringe approximately l/S in. (3
3. Significance And Use
mm) below each of the saw cut longitudinal edges for the
3.1 All tubing is assembled with a system of joints, many
entire 12 in. (300 mm) length along the inner tube surface.
Approximately 1 mL of flux is used per specimen.
6.3 Place the test specimen on a stand at a 2 to 3’ angle
I This test method is under the jurisdiction of ASTM Committee B-5 on
with the end to be heated approximately 4 in. (100 mm)
Copper and Copper Alloys and is the direct responsibility of Subcommittee 805.06
on Methods of Test.
above the burner (Fig. 2). The angle will allow the flux to
Current edition approved Feb. 24, 1984. Published April 1984.
flow to the cool end (Fig. 3).
* The boldface numbers in parentheses refer to the list of references at the end
6.4 Heat the specimen to 45o’C (842°F) in 21 -c 1 s.
of this method.
3 Annrrai Book of ASTM Slandards, Vol 02.01,
Temperature may be monitored by attaching a thermo-
ASTM B-732 BY - 0-7’59530 0529888 T=lO H
6.7 Precaution-High-order hydrocarbon solvents are
normally considered hazardous. It is the responsibility of
whoever uses this standard to establish appropriate safety
practices and to determine the applicability of regulatory
limitations prior to use.
6.8 Scrub specimens with warm water containing a deter-
gent; rinse and pickle for 30 to 40 s in a 5 to 10 volume %
sulfuric acid solution to remove cupric corrosion products;
Push down dghtly
rinse again; immerse for 30 to 60 s in concentrated hydro-
wh
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