ASTM F315-70(1996)

Test Method of Identification of Solder and Solder Flux Contaminants in Aerospace Fluids (Withdrawn 1998)

General Information

• Status: Withdrawn
• Withdrawal Date: 09-Oct-1998
• ICS: 49.080 - Aerospace fluid systems and components
• ICS: 75.120 - Hydraulic fluids
• Technical Committee: E21 - Space Simulation and Applications of Space Technology
• Drafting Committee: E21.05 - Contamination

Standards Content (Sample)

ASTM F3L5 70 - 0753530 0582Lbb 011 w
AMERICAN SOCIETY FOR TESTING AND MATERIALS
Designation: F 315 - 70 (Reapproved 1996) An American National Standard
100 Ban Harbor Dr. West Conshohocken. PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
If not listed in the current combined index. will appear in the next edition.
Standard Test Methods of
Identification of Solder and Solder Flux Contaminants in
Aerospace Fluids’
This standard is issued under the fixed designation F 3 15; 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 reapproval. A
superscript epsilon (c) indicates an editorial change since the last revision or reapproval.
This fluorescence test, however, cannot be used to detect rosin concen-
1. Scope
trations of IO00 gammas (0.00 I g) or less.
1.1 This test method covers the chemical identification of
solder and solder flux contamination in aerospace fluids by
5. Significance and Use
spot test procedures.
5.1 After a soldering operation, the flux residue becomes a
1.2 This standard does not purport to address all of the
contaminant. It is essential to identify the presence of
safety concerns, if any, associated with its use. It is the
residual flux for the selection of a proper flux-removal
responsibility of the user of this standard to establish appro-
solvent.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
6. Interferences
2. Referenced Document
6.1 Any organic or inorganic colored compound soluble
in acetic anhydride will interfere with the color formation of
2.1 ASTM Standard:
the reaction.
D 1193 Specification for Reagent Water2
3. Reagents 7. Apparatus
1.1 White Porcelain Spot Test Plate, with a test area of
3. I Purity of Reagents-Reagent grade chemicals shall be
approximately 5 cm2 or a hanging drop microscope slide.
used in all tests. Unless otherwise indicated, it is intended
7.2 Capillary Tubes, approximately 2.0 by 100 mm in
that all reagents shall conform to the specifications of the
size.
Committee on Analytical Reagents of the American Chem-
7.3 Hanging Drop Microscope Slides.
ical Society, where such specifications are availablea Other
7.4 White Filter Paper.
grades may be used, provided it is first ascertained that the
reagent is of sufficiently high purity to permit its use without
lessening the accuracy of the determination. 8. Reagents
3.2 Purity of Water-Unless otherwise indicated, refer-
8.1 Acetic Anhydride (99 to 100 % pure).
ences to water shall be understood to mean reagent water
8.2 Sulfuric Acid (sp gr 1.84)-Concentrated sulfuric acid
conforming to Specification D 1193.
cH2S04).
IDENTIFICATION OF ROSIN IN SOLDER FLUX CONTAMI-
9. Sampling
NATION BY SPOT TEST PROCEDURE
9.1 Scrape the sample from the surface and transfer to a
4. Summary of Test Method
white indented spot plate or place in the depression of a
hanging drop microscope slide. Place the slide on top of a
4.1 Rosin dissolved in acetic anhydride and reacting with
white filter paper.
concentrated sulfuric acid produces a fleeting running purple
color at the periphery. The purple color persists for 1 or 2 s.
10. Procedure
4.2 The limit of identification is 10 pg of rosin.
10.1 From the capillary tube add 2 micro drops of acetic
NOTE l-One gamma is equal to I pg or 0.000001 g.
NOTE 2-Pure rosin particles (approximately 5 mg in size) observed anhydride to the contaminant. Stir the acetic anhydride to
under a long-wave ultraviolet light will produce a light blue fluorescence.
dissolve the rosin. Add 2 micro drops of concentrated
sulfuric acid (H2S04, sp gr 1.84), allowing the acid to run
into the acetic anhydride. A fleeting running purple color
I This test method is under the jurisdiction of ASTM Committee E-21 on Space
will appear in the acetic anhydride if rosin is present.
Simulation and Applications of Space Technology and is the direct responsibility
of Subcommittee E21.05 on Contamination.
Current edition effective Aug. 14, 1970. Originally issued 1966. Replaces
IDENTIFICATION OF LEAD OR TIN IN SOFT COMMON
D 2546 - 66 T. Redesignated F 3 15 in 1970.
SOLDER BY SPOT TEST PROCEDURE
* Annual Book of ASTM Standards, Vol 1 I .O 1.
3 Reagent Chemicals, American Chemical Societv SDecifications. American
11. Summary of Test Method
Chemical Society, Washington. DC. For suggestions on the testing of reagents not
listed by the American Chemical Society, see Analar Standards for Laboratory
11.1 Lead in solution will react with a saturated solution
Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
of sodium sulfide and produce a black-brown precipitate of
and National Formulary, U.S. Pharmaceutical Convention, Inc. (USPC),
Rockville, MD.
lead sulfide.

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