ASTM F1110-02

Standard Test Method for Sandwich Corrosion Test

SIGNIFICANCE AND USE
The data generated by this test method shall be used to determine whether aircraft structural aluminum alloys are liable to be corroded or damaged by application of the test material during routine maintenance operations.
Interpretation of the sandwich corrosion test results is based on a comparison of the appearance of faying surfaces of three sets of coupons. One set of test coupons is exposed with reagent water only in the faying surfaces, to establish the baseline (controls) against which the panels exposed to the test material are compared. Disregard corrosion at cut edges of the test coupons.
The relative corrosion severity rating system is provided in order to allow a numerical classification of the test results and to eliminate the necessity for elaborate weight loss measurements. Pitting corrosion, which is rated 4—extensive (severe) corrosion, may involve only a negligible weight loss.
Relative corrosion severity rating system:
Appearance/Corrosion: 0—No visible corrosion and no discoloration present 1—Very slight corrosion or discoloration, and/or up to 5 % of areaA corroded 2—Discoloration and/or up to 10 % of areaA corroded 3—Discoloration and/or up to 25 % of areaA corroded 4—Discoloration and/or more than 25 % of areaA corroded, and/or pitting
present
A ”Area” refers to area under the filter paper, or if no filter paper is used, the area where the test material was applied.
SCOPE
1.1 This test method defines the procedure for evaluating the corrosivity of aircraft maintenance chemicals, when present between faying surfaces (sandwich) of aluminum alloys commonly used for aircraft structures. This test method is intended to be used in the qualification and approval of compounds employed in aircraft maintenance operations.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information.
1.3 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements appear in Section 9.

General Information

• Status: Historical
• Publication Date: 09-Aug-2002
• ICS: 49.025.99 - Other materials
• Technical Committee: F07 - Aerospace and Aircraft
• Drafting Committee: F07.07 - Qualification Testing of Aircraft Cleaning Materials

Relations

• Replaces: ASTM F1110-90(1998) - Standard Test Method for Sandwich Corrosion Test
• Effective Date: 10-Aug-2002
• Replaced By: ASTM F1110-08 - Standard Test Method for Sandwich Corrosion Test
• Effective Date: 01-May-2008
• Referred By: ASTM D6361/D6361M-98(2020) - Standard Guide for Selecting Cleaning Agents and Processes
• Effective Date: 10-Aug-2002
• Referred By: ASTM C800-19 - Standard Specification for Fibrous Glass Blanket Insulation (Aircraft Type)
• Effective Date: 10-Aug-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F1110–02
Standard Test Method for
1
Sandwich Corrosion Test
This standard is issued under the fixed designation F 1110; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope MIL-A-8625 Anodic Coatings for Aluminum and Al Al-
6
loys
1.1 This test method defines the procedure for evaluating
thecorrosivityofaircraftmaintenancechemicals,whenpresent
3. Terminology
between faying surfaces (sandwich) of aluminum alloys com-
3.1 Definition of Term Specific to This Standard:
monly used for aircraft structures. This test method is intended
3.1.1 sandwich corrosion test—a comparative accelerated
to be used in the qualification and approval of compounds
environmentaltestofthecorrosivityofliquidorsolidmaterials
employed in aircraft maintenance operations.
present between faying surfaces of structural aluminum alloys
1.2 The values stated in SI units are to be regarded as the
commonly used in aerospace construction.
standard. The values given in parentheses are for information.
1.3 This standard may involve hazardous materials, opera-
4. Summary of Test Method
tions, and equipment. This standard does not purport to
4.1 Aluminum coupons having clad or anodized nonclad
address all of the safety concerns, if any, associated with its
surfaces are sandwiched together with a filter paper saturated
use. It is the responsibility of the user of this standard to
with the test material between the coupons. The sandwiched
establish appropriate safety and health practices and deter-
coupons are cycled between warm ambient air and warm
mine the applicability of regulatory limitations prior to use.
humid air for 7 days. The coupons are then inspected to
Specific hazard statements appear in Section 9.
determine whether corrosion more severe than that caused by
reagent water has occurred on the surfaces exposed to the test
2. Referenced Documents
material. This test method is used for solutions of dry granular
2.1 ASTM Standards:
2 material or for liquid materials.
D 1193 Specification for Reagent Water
D 1748 Test Method for Rust Protection by Metal Preser-
5. Significance and Use
3
vatives in the Humidity Cabinet
5.1 The data generated by this test method shall be used to
G46 Guide for Examination and Evaluation of Pitting
determine whether aircraft structural aluminum alloys are
4
Corrosion
5 liable to be corroded or damaged by application of the test
2.2 Industry Standards:
material during routine maintenance operations.
SAE-AMS-QQ-A-250/4 Al Alloy 2024, Plate and Sheet
5.2 Interpretation of the sandwich corrosion test results is
SAE-AMS-QQ-A-250/5 Al Alloy Alclad 2024, Plate and
based on a comparison of the appearance of faying surfaces of
Sheet
three sets of coupons. One set of test coupons is exposed with
SAE-AMS-QQ-A-250/12 Al Alloy 7075, Plate and Sheet
reagent water only in the faying surfaces, to establish the
SAE-AMS-QQ-A-250/13 Al Alloy Alclad 7075, Plate and
baseline (controls) against which the panels exposed to the test
Sheet
material are compared. Disregard corrosion at cut edges of the
2.3 Military Specification:
test coupons.
5.3 The relative corrosion severity rating system is provided
1
This test method is under the jurisdiction of ASTM Committee F07 on in order to allow a numerical classification of the test results
Aerospace and Aircraft and is the direct responsibility of Subcommittee F07.07 on
and to eliminate the necessity for elaborate weight loss
Qualification Testing of Aircraft Cleaning Materials.
measurements. Pitting corrosion, which is rated 4—extensive
Current edition approved Aug. 10, 2002. Published September 2002. Originally
(severe) corrosion, may involve only a negligible weight loss.
published as F 1110 – 86. Last previous edition F 1110 – 90(1998).
2
Annual Book of ASTM Standards, Vol 11.01.
3
Annual Book of ASTM Standards, Vol 05.01.
4
Annual Book of ASTM Standards, Vol 03.02.
5 6
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F1110–02
5.4 Relative corrosion severity rating system: toxiccompounds.Takesuitableprecautionstopreventpersonal
injury from these hazards. When the composition of the test
Appearance/Corrosion:
0—No visible corrosion and no discolor
...