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Pratt & Whitney
PWA36604 Revision C
Hot Corrosion

TEST STANDARD:

To achieve "Conformance", 3.2.3.2 Hot Corrosion: Test specimens shall show no evidence of hot corrosion greater than 0.0002 inches in depth when tested and examined in accordance with the procedure in Appendix A (see Test Method below).

TEST RESULT:

ALLOY TEMPERATURE DEPTH OF ATTACK(inches) RESULT
AMS 5544 (Waspaloy) 1600°F ± 10°F 0.0001 EnTron Conforms
AMS 5536 (Hastelloy X) 1600°F ± 10°F 0.0001 EnTron Conforms
AMS 5608 (Haynes 188) 1600°F ± 10°F 0.0001 EnTron Conforms
AMS 5508 (Greek Ascoloy) 1050°F ± 10°F 0.0001 EnTron Conforms
AMS 6359 (4340 Steel) 750°F ± 10°F 0.0001 EnTron Conforms
AMS 4037 (2024-T3 Aluminum) 600°F ± 25°F 0.0001 EnTron Conforms
AMS 4375 (AZ31B-0 Magnesium) 600°F ± 25°F 0.0001 EnTron Conforms

TEST METHOD:

TESTING WAS CONDUCTED IN ACCORDANCE WITH APPENDIX A:

  1. Preparation of Test Specimens:
    1. Prepare one panel of each of the following alloys for each cleaner material to be tested, plus one additional panel of each to serve as a control: AMS 4037, AMS 4375, AMS 5508, AMS 5536, AMS 5544, AMS 5608, AMS6359. Take care not to contaminate the control panels with the cleaner being tested.
    2. Panels shall be a minimum of 0.050 inch thick, with a minimum surface area of 0.5 square inches.
    3. Mark one side of each panel with the material specification and cleaner identification using silver pencil or mechanical engraving to ensure identification after thermal exposure.
    4. Polish the side opposite panel identification to a finish equivalent to that produced by 600 grit emery cloth.
  2. Preparation of Test Specimens for Exposure:
    1. Arrange test panel(s) and control(s), polished side up, on a suitable sheet of high temperature alloy or in a container that will withstand test temperatures.
    2. Cover the surface of the test panel(s) with the cleaner to be tested. Do not allow the cleaner solution to contact the control panel(s).
    3. Dry the test panels in a low temperature oven or other low heat source such as heat lamps.
  3. Thermal Exposure:
    1. Expose coated test panel(s) for a minimum of eight (8) hours and a maximum often (10) hours at the temperatures shown.