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Pratt & Whitney
PWA36604 Revision C
Stock Loss

Effect Of Cleaning Agents On Aircraft Engine Materials Stock Loss Test Method

TEST STANDARD:

  • Uncoated Panels: Maximum Allowable stock loss is 0.00025„ to achieve conformance with test's standard when immersed for 1 hour at 160°F (70°C).
  • Electroplated Panels: Maximum Allowable stock loss is 0.00025„ to achieve conformance with test's standard when immersed for 1 hour at 160°F (70°C).
  • Plasma Coated Panels: Maximum Allowable stock loss is 0.001" for plasma spray deposits to achieve conformance with test standard when immersed for 1 hour at 160°F (70°C).

TEST RESULTS:

TEST 1: UNCOATED METAL PANELS

Alloy Tested Average Loss (In Inches) Average Wt. Loss Result
AMS 4037 Aluminum <0.000010 0.0010 g Conforms
AMS 4375 Magnesium <0.000010 0.0001 g Conforms
AMS 4507 Copper <0.000010 0.0001 g Conforms
AMS 4544 Nickel <0.000010 0.0001 g Conforms
AMS 4640 Aluminum Bronze <0.000010 0.0020 g Conforms
AMS 4911 Titanium <0.000010 0.0001 g Conforms
AMS 5040 Steel <0.000010 0.0010 g Conforms
AMS 5382 Cobalt <0.000010 0.0003 g Conforms
AMS 5504 Corrosion Res. Steel <0.000010 0.0003 g Conforms
AMS 5508 Corrosion Res. Steel <0.000010 0.0001 g Conforms
AMS 5524 Corrosion Res. Steel <0.000010 0.0002 g Conforms
AMS 5525 Corrosion Res. Steel <0.000010 0.0010 g Conforms
AMS 5536 Nickel <0.000010 0.0003 g Conforms
AMS 5537 Cobalt <0.000010 0.0002 g Conforms
AMS 5596 Nickel <0.000010 0.0002 g Conforms
AMS 5661 Nickel <0.000010 0.0014 g Conforms
AMS 6431 Steel <0.000010 0.0063 g Conforms
AMS 4434 (AZ92) Magnesium <0.000010 0.0001 g Conforms

TEST 2: ELECTROPLATED PANELS

Alloy Average Loss
(In Inches) 		Average Wt. Loss Result
AMS 4037 / AMS 2470Anodic Treatment <0.000010 0.0005 g Conforms
AMS 5504 / AMS 2400 Cadmium Plated <0.000010 0.0003 g Conforms
AMS 5504 / AMS 2406 Chromium Plated <0.000010 0.0001 g Conforms
AMS 5504 / AMS 2410 Silver Plated <0.000010 0.0008 g Conforms
AMS 5504 / AMS 2416 Ni-Cad Plated <0.000010 0.0004 g Conforms
AMS 5504 / AMS 2418 Copper Plated <0.000010 0.0004 g Conforms
AMS 5504 / AMS 2424 Nickel Plated <0.000010 0.0004 g Conforms

TEST 3: PLASMA COATED PANELS

Alloy Average Loss(In Inches) Average Wt. Loss Result
AMS 4911 / AMS 2437-3 <0.00010 0.0005 g Conforms
AMS 5504 / AMS 2437-2 <0.00010 0.0038 g Conforms
AMS 5504 / AMS 2437-3 <0.00010 0.0007 g Conforms
AMS 5504 / AMS 2437-5 <0.00010 0.0016 g Conforms
AMS 5504 / AMS 2437-6 <0.00010 0.0007 g Conforms
AMS 5504 / AMS 2437-7 <0.00010 0.0012 g Conforms

TEST CONDITIONS:

  • Dilution: As received (ready to use)
  • Temperature: 160°F (70°C)
  • Immersion Time: 1 Hour (60 minuets)