504.3-3 DEICING AND ANTIFREEZE FLUIDS
50 percent inhibited aqueous potassium acetate solution is commercially marketed and reputed to be a completely safe new alternative to the ethylene glycols. However, its interaction with aluminum alloys is less than satisfactory.
3.1 Pretest
The following information is required to conduct contamination by fluid tests adequately.
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a. General. Information listed in Part One, paragraphs 5.7 and 5.9, and Annex A, Task 405 of this Standard.
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b. Specific to this Method.
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(1) List of the test fluid(s) to be used
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(2) The method of test fluid application. (See paragraph 4.1.)
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(3) The soak (post-wetting) temperature and duration.
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(4) The cleaning/decontaminating fluids.
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(5) The sequence of test fluid applications and post-test cleaning instructions.
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(6) The type of exposure, i.e., occasional, intermittent, or extended.
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(7) Any requirement for long term surveillance and inspections.
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(8) Material properties, e.g., tensile strength, hardness, weight, dimensions, protective finish, etc., of the material likely to be affected by the contaminating fluids.
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(9) Record of initial baseline information with digital photography.
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(10) Record of test item and test fluid temperature.
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c. Tailoring. Necessary variations in the basic test procedures to accommodate environments identified in the LCEP.
3.2 During Test
8.2 During Test. Collect the following information as appropriate during conduct of the test:
- a. General. Information listed in Part One, paragraph 5.10, and in Annex A, Tasks 405 and 406 of this Standard.
- b. Specific to this Method.
- (1) Record of chamber and test item temperature versus time conditions.
- (2) Test fluid(s) and the corresponding temperature.
- (3) Any deterioration noted during visual checks.
3.3 Post Test
The following post test data shall be included in the test report.
- a. General. Information listed in Part One, paragraph 5.13, and in Annex A, Task 406 of this Standard.
- b. Specific to this Method.
- (1) Results of each functional check after each exposure to each of the specified fluids.
- (2) Any degradation of materials, protective finishes, etc. (see paragraph 3.1b(8)).
- (3) Exposure durations and types.
- (4) Any deviation from the original test plan.
- (5) Record degradation with digital photography.