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Revision B, January 1, 1993

Complete Document

Effect of Cleaning Agents on Aircraft Engine Materials Stock Loss Test Method

Includes all amendments and changes through Reaffirmation Notice , March 2000

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Product Details:

  • Revision: Revision B, January 1, 1993
  • Published Date: March 2000
  • Status: Active, Most Current
  • Document Language: English
  • Published By: SAE International (SAE)
  • Page Count: 23
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:


1.1 This SAE Aerospace Recommended Practice (ARP) covers the determination of the amount of stock loss caused by use of chemical cleaning agents on aircraft turbine engine materials.

1.2 The evaluation is conducted on representative engine materials by determination of weight loss during total immersion in the cleaning solution with the weight-loss measurement converted to stock loss by calculation.

1.3 Test conditions are based upon manufacturer's recommended operating parameters for maximum concentration, maximum temperature, and twice the maximum immersion time.

1.4 Chemical cleaning solutions and compounds used for preinspection cleaning of aircraft turbine engine parts shall be subject to requirements of this test practice.

1.5 The test does not give consideration to cleaning performance of the compounds except as specified in 5.1.4.

1.6 Classification:

Examples of types of cleaning materials to be qualified under the requirements of this test procedure are:

a. Category 1: Cold carbon and paint remover

b. Category 2: Alkaline rust remover

c. Category 3: Alkaline oxide conditioner

d. Category 4: Acidic oxide conditioner

e. Category 5: Alkaline permanganate oxide conditioner

f. Category 6: Inhibited phosphoric acid

g. Category 7: Hot carbon and paint remover

h. Category 8: Silicone rubber remover

i. Category 9: Antigalling compound remover

j. Category 10: Aqueous cleaner

k. Category 11: Alkaline degreaser

l. Category 12: Organic solvent cleaner

1.7 Safety - Hazardous Materials:

While the materials, methods, applications, and processes described or referenced in this aerospace recommended practice may involve the use of hazardous materials, this aerospace recommended practice does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.

1.8 Significance:

This aerospace recommended practice establishes a test procedure for determining the metal removal characteristics of aircraft turbine engine cleaning materials when used on a representative list of aircraft turbine engine alloys and coatings. This test result shall be compared with the following maximum stock loss per surface to establish acceptability for overhaul shop evaluation of cleaning performance characteristics:

a. Bare Panels or Disks: 0.000025 in (0.635 μm)

b. Electroplated Panels: 0.000025 in (0.635 μm)

c. Plasma Coated Panels or Bars: 0.000100 in (2.5 μm)
AIA/NAS Aerospace Standards