MIL-PRF-25134C(USAF)
hour period the panels shall be removed, disassembled, washed with water, and cleaned with a
suitable solvent. The individual panels shall then be inspected for pitting, etching, and corrosion
products. (Slight surface etching under the washers on magnesium panels treated in accordance
with MIL-M-3171, Type I shall not be cause for rejection.)
4.7.10 Hydrogen embrittlement test. Specimens shall be prepared and tested in accordance with
ASTM F519, Type 1a, for maintenance chemicals. Accept/reject criteria shall be in accordance
with ASTM F519, paragraph 9.
4.7.11 Flammability.
4.7.11.1 Preparation of panel. A 1 by 6 inch panel shall be prepared from 2024-T3 aluminum
alloy conforming to ASTM B209. The panel shall be cleaned and a hole drilled near one end to
facilitate hanging. The panel shall then be dipped in a beaker of the remover and immediately
suspended on a ring stand.
4.7.11.2 Procedure. A micro-burner flame, not exceeding 3/16 inch in length shall be passed,
within a 2 second period, back and forth along the lower edge of the panel. This operation shall
be repeated a minimum of three times at 3 to 5 second intervals. If the remover ignites, the flame
shall be removed from the panel and observation shall be made to ascertain whether the remover
continues to burn. Continuation of burning shall be cause for rejection.
4.7.12 Cold stability. Equal quantities of the remover shall be placed in two separate glass
containers. One of the containers shall stand at room temperature while the other is cooled to a
temperature of 14° 2°F for a period of 4 hours. At the end of the 4 hour period the cooled
sample shall be permitted to return to room temperature after which both samples shall be
agitated by moderate shaking for 30 seconds. After shaking, the samples shall be examined for
any differences in appearance and consistency. They shall then be permitted to stand for 1 hour
and the cooled sample observed for settling as compared to the uncooled specimen. If the cooled
sample exhibits undesirable changes in consistency or appearance or shows more settling than the
uncooled sample after the 1 hour settling period, the material shall be rejected.
4.7.13 Storage stability. A sample of remover shall be stored unopened at a temperature of 75° ±
5°F for 6 months. At the end of the storage period the container shall be opened and the contents
tested for conformance to the requirements of paragraphs 4.7.1 through 4.7.12. If the sample
fails to meet any of the specified requirements, the material shall be rejected.
4.7.14 Service test. If service testing is required, the government, in coordination with the
contractor, will determine an acceptable field location. Unless otherwise specified, the contractor
shall provide 50 gallons of remover to the designated field location for testing. Samples will be
forwarded in accordance with instructions contained in the service test authorization letter. The
service test shall consist of field evaluation under service conditions conducted in accordance with
standard operating procedures on as many aircraft or as much equipment as needed to determine
suitability of the product for military use.
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