ASTM F1111-2002 Standard Test Method for Corrosion of Low-Embrittling Cadmium Plate by Aircraft Maintenance Chemicals《用飞行器维护化学膜法测定低脆化镉板防腐蚀性的标准试验方法》.pdf

1、Designation: F 1111 02Standard 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 (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. 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, and X1.3.2. Referenced Documents2.1 ASTM Standards:D 329 Specification for Acetone2D 740 Specification for Methyl Ethyl Ketone2D 1193 Specification for Reagent Water3D 4080 Specification for Trichloroethylene, Technical andVapor Degreasing Grade42.2 Indu

6、stry Standards:SAE-AMS-6345 Steel Sheet, Strip and Plate (SAE 4130)Normalized or Otherwise Heat Treated53. 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 t

7、estmaterial 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

8、 to 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 with

9、stand 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)

10、.4.6 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 E

11、thyl 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 breathi

12、ng 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 edition app

13、roved May 10, 2002. Published June 2002. Originallypublished as F 1111 88. Last previous edition F 1111 88 (1998).2Annual Book of ASTM Standards, Vol 06.04.3Annual Book of ASTM Standards, Vol 11.01.4Annual Book of ASTM Standards, Vol 15.05.5Available from Society of Automotive Engineers (SAE), 400 C

14、ommonwealthDr., 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 oxide are very toxic and corro-sive to skin. Take suitable precautions in the handling of themto avoid personal injury

15、. 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 suitable precautions to prevent personalinjury.7. Test Specimens7.1 The test specimens shall be made of 4130 steel Condi-

16、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 minimum thickness of 0.13 mm (0.0005 in.).7.2 Three replicates should be tested in each concentrationof maintenanc

17、e 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 removethe loose cadmium plate. Immerse the test specimens in abeaker of 1,1,1-trichloroethylene maintained at a tem

18、peratureof 66 6 3C (150 6 5F) and swab the surface of theindividual specimen thoroughly using clean forceps to hold thetest specimen and the cotton swab.8.2 Shake off excess solvent. Transfer and immerse the testspecimens separately several times in a beaker of methyl ethylketone.8.3 Shake off exces

19、s methyl ethyl ketone and dry in an ovenat 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 volumeof solution shall be 25 mL of solution per 625 mm2(1 in.2)ofspecimen surface.9.2 Solution ConcentrationUnl

20、ess 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 the material undertest. (For solid materials concentrated condition shall mean onepart solid to five parts by weig

21、ht 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 andspecification of diluent used in the test.9.3 TemperatureUnless otherwise specified, the test tem-perature shall be

22、 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 temperature in a desiccator, thenweigh to the nearest 0.1 mg.10.2 Transfer the specimens to the vessel containing t

23、hepreheated 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 the end of the exposureperiod and proceed as follows:10.3.1 Hold the specimen in forceps and rinse thoroughly ina

24、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 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 i

25、n 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 tested.11.1.2 Concentrations and diluent used.11.1.3 Number of specimens tested.11.1.4 Temperature and duration of

26、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 statement is made about either the precision or biasof this test method since the result merely states whether there

27、is conformance to the criteria for success specified in theaccompanying material or process specification of the materialbeing tested, or both.13. Keywords13.1 aircraft maintenance chemicals; corrosion; low-embrittling cadmium plate; weight lossF1111022APPENDIX(Nonmandatory Information)X1. LOW-EMBRI

28、TTLING CADMIUM PLATEX1.1 Degrease and clean the SAE-AMS-6345 specimensby abrasive blasting with No. 180 aluminum oxide grit. Rinsespecimens free 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 achi

29、eve 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)Total 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

30、 (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 (2306 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 an

31、d corrosive toskin. Take suitable precautions in the handling of them to avoidpersonal injury. Use with adequate ventilation and keep awayfrom acids.)ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. User

32、s of this standard are expressly advised 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

33、five years andif not revised, either 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 technica

34、l 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 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).F1111023