ASTM F1111-2008a Standard Test Method for Corrosion of Low-Embrittling Cadmium Plate by Aircraft Maintenance Chemicals.pdf

1、Designation: F 1111 08aStandard Test Method forCorrosion of Low-Embrittling Cadmium Plate by AircraftMaintenance Chemicals1This standard is issued under the fixed designation F 1111; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,

2、the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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. Scope1.1 This test method is inten

3、ded as a means of determiningthe corrosive effects of aircraft maintenance chemicals onlow-embrittling cadmium plating used on aircraft high-strengthsteel, under conditions of total immersion by quantitativemeasurements of weight change.1.2 This standard may involve hazardous materials, opera-tions,

4、 and equipment. This standard does not purport toaddress all of the safety concerns, if any, associated with itsuse. It is the responsibility of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.For s

5、pecific hazard statements see Section 6, 4.1.2. Referenced Documents2.1 ASTM Standards:2D 329 Specification for AcetoneD 740 Specification for Methyl Ethyl KetoneD 1193 Specification for Reagent WaterD 4080 Specification for Trichloroethylene, Technical andVapor-Degreasing Grade2.2 Industry Standard

6、s:SAE-AMS-6345 Steel Sheet, Strip and Plate (SAE 4130)Normalized or Otherwise Heat Treated33. Significance and Use3.1 The data generated by this test method shall be used todetermine whether low embrittling cadmium plated parts areliable to be corroded or damaged by application of the testmaterial d

7、uring routine maintenance operations.4. Apparatus4.1 Wide Mouth Sealable Glass Jar or Stoppered Flask,having a capacity so chosen that specimens will remain fullyimmersed in a vertical position and not in contact with otherspecimens during the test and the ratio of area of immersedmetal to the volum

8、e of solution will be as prescribed in 9.1.(WarningSome aircraft maintenance chemicals whenheated have high vapor pressures or may produce gases duringtesting. Suitable precautions should be taken to prevent thecontaining vessel from exploding or the vessel should be sochosen as to withstand the res

9、ulting pressures.)4.2 Constant Temperature DeviceAny suitable regulatedheating device may be employed for maintaining the solutionat the required temperature.4.3 Sandblaster.4.4 Ampere Meter, capable of measuring 60 6 5A.4.5 Oven, capable of maintaining temperature of 110 6 2C(230 6 4F).4.6 Plating

10、Bath, containing the solution specified in MIL-STD-870, Type I, Class 1.5. Reagents5.1 Purity of WaterUnless otherwise indicated, referencesto water shall be understood to mean reagent water as definedby Type III of Specification D 1193.5.2 Trichloroethylene, in accordance with SpecificationD 4080.5

11、.3 Methyl Ethyl Ketone, in accordance with SpecificationD 740.5.4 Acetone, in accordance with Specification D 329.5.5 Aluminum Oxide, 180 grit.6. Safety Precautions6.1 The solvents used in cleaning test specimens are flam-mable or harmful if inhaled, or both. Keep away from sparksand open flames. Av

12、oid breathing vapors and prolonged orrepeated contact with skin. Use adequate ventilation.1This test method is under the jurisdiction of ASTM Committee F07 onAerospace and Aircraft and is the direct responsibility of Subcommittee F07.07 onQualification Testing of Aircraft Cleaning Materials.Current

13、edition approved Oct. 1, 2008. Published November 2008. Originallyapproved in 1988. Last previous edition approved in 2008 as F 1111 08.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume in

14、formation, refer to the standards Document Summary page onthe ASTM website.3Available from Society of Automotive Engineers (SAE), 400 CommonwealthDr., Warrendale, PA 15096-0001.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.2 Some

15、 materials used for aircraft maintenance maycontain flammable solvents, acids or alkalis, or other toxiccompounds. Take suitable precautions to prevent personalinjury.7. Test Specimens7.1 The test specimens shall be made of 4130 steel Condi-tion N in accordance with SAE-AMS-6345, measuring 25.4 by50

16、.8 by 1.22 mm (1 by 2 by 0.048 in.) and cadmium plated inaccordance with MIL-STD-870, Type I, Class1.7.2 Three replicates should be tested in each concentrationof maintenance chemicals solution as prescribed in 9.2.8. Precleaning Test Specimens8.1 Using a stiff bristle brush, brush off loose cadmium

17、plate. Be careful to brush only as hard as is required to removethe loose cadmium plate. Immerse the test specimens in abeaker of methyl npropyl ketone4(2-pentanone) and swab thesurface of the individual specimen thoroughly using cleanforceps to hold the test specimen and the cotton swab.8.2 Shake o

18、ff excess solvent. Transfer and immerse the testspecimens separately several times in a beaker of methyln-propyl ketone (2-pentanone).8.3 Shake off excess methyl n-propyl ketone (2-pentanone)and dry in an oven at 110 6 2C (230 6 4F) for 1 h.9. Test Conditions9.1 Ratio of Area of Immersed Metal to Vo

19、lume ofSolutionThe ratio of the area of immersed metal to volumeof solution shall be 25 mL of solution per 625 mm2(1 in.2)ofspecimen surface.9.2 Solution ConcentrationUnless otherwise specified,test the specimens in solutions of the maintenance chemicals inthe concentrated as-received condition and

20、at the recom-mended use dilution, using water to dilute the material undertest. (For solid materials concentrated condition shall mean onepart solid to five parts by weight of diluent.) In case thematerial is not soluble at the recommended dilution, record thisfact and continue with the test.9.2.1 I

21、f water is not used as the diluent, record the type andspecification of diluent used in the test.9.3 TemperatureUnless otherwise specified, the test tem-perature shall be 35 6 1C (95 6 2F).9.4 Test DurationUnless otherwise specified, the testperiod shall be 24 h.10. Procedure10.1 Dry the precleaned

22、specimens at 110C (230F) for 1h, allow to cool to room temperature in a desiccator, thenweigh to the nearest 0.1 mg.10.2 Transfer the specimens to the vessel containing thepreheated maintenance chemical solution. Seal the test vesselto prevent loss of vapor. Maintain at the required temperatureand e

23、xpose for a period of 24 h.10.3 Remove the specimens at the end of the exposureperiod and proceed as follows:10.3.1 Hold the specimen in forceps and rinse thoroughly ina 1-L beaker into which tap water is flowing rapidly.10.3.2 Rinse thoroughly in water at room temperature.10.3.3 Rinse with a stream

24、 of acetone from a wash bottle.Shake free from acetone and dry.10.3.4 Place the specimens in an oven at 110 6 2C (230 64F) for 1 h and allow to cool to room temperature in adesiccator.10.3.5 Reweigh the specimens to the nearest 0.1 mg andrecord.11. Report11.1 Report the following data for each test

25、performed:11.1.1 Name and type of maintenance chemical tested.11.1.2 Concentrations and diluent used.11.1.3 Number of specimens tested.11.1.4 Temperature and duration of test.11.1.5 Average weight loss in milligrams per 24 h.11.1.6 Range in weight loss values.11.1.7 Report any visual change in appea

26、rance includingstaining.12. Precision and Bias12.1 No statement is made about either the precision or biasof this test method since the result merely states whether thereis conformance to the criteria for success specified in theaccompanying material or process specification of the materialbeing tes

27、ted, or both.13. Keywords13.1 aircraft maintenance chemicals; corrosion; low-embrittling cadmium plate; weight lossASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly ad

28、vised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, eithe

29、r reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend.

30、If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).4Methyl-n-propyl ketone, 90% purity or betterF 1111 08a2