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

1、Designation: F 1111 08Standard 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, t

2、he 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 intend

3、ed 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 sp

5、ecific hazard statements see Section 6, 4.1, and X1.3.2. 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

6、 Standards: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 testm

7、aterial during 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

8、the volume 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 withstan

9、d the resulting 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

10、 Plating Bath, containing the solution specified in X1.2.5. 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 4080.5.3 Methyl Ethyl

11、 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. Avoid breathing v

12、apors 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 edition approve

13、d May 1, 2008. Published June 2008. Originallyapproved in 1988. Last previous edition approved in 2002 as F 1111 02.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to

14、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 Cyanides and cadmium oxi

15、de are very toxic and corro-sive to skin. Take suitable precautions in the handling of themto avoid personal injury. Use adequate ventilation and keepaway from acids.6.3 Some materials used for aircraft maintenance maycontain flammable solvents, acids or alkalis, or other toxiccompounds. Take suitab

16、le 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 by50.8 by 1.22 mm (1 by 2 by 0.048 in.) and cadmium plated inaccordance with Appendix X1. The electrodeposited platingshall have a

17、 minimum thickness of 0.13 mm (0.0005 in.).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 cadmiumplate. Be careful to brush only as hard as is required to

18、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 off excess solvent. Transfer and immerse the testspecimens

19、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 Volume ofSolutionThe ratio of the area of immersed metal to

20、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 at the recom-mended use dilution, using water to dilute th

21、e 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 If water is not used as the diluent, record the type andspe

22、cification 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 specimens at 110C (230F) for 1h, allow to cool to room tem

23、perature 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 expose for a period of 24 h.10.3 Remove the specimens at th

24、e 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 of acetone from a wash bottle.Shake free from acetone and

25、 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 performed:11.1.1 Name and type of maintenance chemical tes

26、ted.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 appearance includingstaining.12. Precision and Bias12.1 No stat

27、ement 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 tested, or both.13. Keywords13.1 aircraft maintenance chemica

28、ls; corrosion; low-embrittling cadmium plate; weight loss4Methyl-n-propyl ketone, 90% purity or betterF1111082APPENDIX(Nonmandatory Information)X1. LOW-EMBRITTLING CADMIUM PLATEX1.1 Degrease and clean the SAE-AMS-6345 specimensby abrasive blasting with No. 180 aluminum oxide grit. Rinsespecimens fre

29、e of abrasive with water.X1.2 Without drying, plate the specimens for approxi-mately 3 to 4 min at a current rating of 18.2 6 1.5 A/dm2(606 5 A/ft2), to achieve a minimum thickness of 0.013 mm(0.0005 in.), using the following embrittlement cadmiumcyanide bath,Cadmium (as CdO) 33.5 g/L (4.5 oz/gal)To

30、tal sodium cyanide (NaCN) 105 g/L (14 oz/gal)Sodium carbonate (Na2CO3) 15 g/L (2 oz/gal)Ratio NaCN to CdO 3.1:1pH 12Temperature 24 6 2C (75 6 4F)Free caustic (NaOH) 18.7 g/L (2.5 oz/gal)X1.3 Rinse the plated specimen in running cold tap waterfollowed by a stream of hot water and dry at 110 6 2C (230

31、6 4F) for 1 h. Ensure that the test specimens are neutral anddo not contain caustic or cyanide residues. (WarningCyanides and cadmium oxide are very toxic and corrosive toskin. Take suitable precautions in the handling of them to avoidpersonal injury. Use with adequate ventilation and keep awayfrom

32、acids.)ASTM 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 advised that determination of the validity of any such patent rights, and the riskof infringement of such righ

33、ts, 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, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional

34、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. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM

35、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).F1111083