ASTM F1111-2008b 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 08bStandard 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 1193 Specification for Reagent Water2.2 Industry Standards:SAE-AMS-6345 Steel Sheet, Strip and Plate (SAE 4130)Normalized or Otherwise Heat Treated32.3 Military Standards:MIL-STD-

6、870 Cadmium Plating, Low Embrittlement,Electrodeposition43. 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 during routine maintenance operatio

7、ns.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 volume of solution will be as prescribe

8、d 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 resulting pressures.)4.2 Constant Tem

9、perature DeviceAny suitable regulatedheating device may be employed for maintaining the solutionat the required temperature.4.3 Oven, capable of maintaining temperature of 110 6 2C(230 6 4F).5. Reagents5.1 Purity of WaterUnless otherwise indicated, referencesto water shall be understood to mean reag

10、ent water as definedby Type III of Specification D 1193.5.2 Methyl n-propyl ketone (MPK).5.3 Acetone, in accordance with Specification D 329.6. 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. Avoi

11、d breathing vapors and prolonged orrepeated contact with skin. Use adequate ventilation.6.2 Some materials used for aircraft maintenance maycontain flammable solvents, acids or alkalis, or other toxiccompounds. Take suitable precautions to prevent personalinjury.1This test method is under the jurisd

12、iction of ASTM Committee F07 onAerospace and Aircraft and is the direct responsibility of Subcommittee F07.07 onQualification Testing of Aircraft Cleaning Materials.Current edition approved Dec. 1, 2008. Published January 2009. Originallyapproved in 1988. Last previous edition approved in 2008 as F

13、1111 08a.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 the standards Document Summary page onthe ASTM website.3Available from Society of Automotive Engineers (SAE

14、), 400 CommonwealthDr., Warrendale, PA 15096-0001.4Available from the Department of Defense Single Stock Point (DODSSP); webserver at http:/dodssp.daps.dla.mil1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Test Specimens7.1 The t

15、est 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 MIL-STD-870, Type I, Class1.7.2 Three replicates should be tested in each concentrationof maintenance chemicals solution

16、 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 methyl npropyl ketone5and swab the surface of theindividual spe

17、cimen 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 methyln-propyl ketone.8.3 Shake off excess methyl n-propyl ketone and dry in anoven at 110 6 2C (230 6 4F) fo

18、r 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 ConcentrationUnless otherwise specified,test the specimens in solutions of the ma

19、intenance 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 weight of diluent.) In case thematerial is not soluble at the recomme

20、nded 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 35 6 1C (95 6 2F).9.4 Test DurationUnless otherwise specified, t

21、he 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 thepreheated maintenance chemical solution. Seal the test vesselto

22、 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 1-L beaker into which tap water is flowing rapidly.10.3.2 Rinse t

23、horoughly 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 in adesiccator.10.3.5 Reweigh the specimens to the nearest 0.1 mg

24、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 test.11.1.5 Average weight loss in milligrams per 24 h.11.1.6 Ran

25、ge 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 thereis conformance to the criteria for success specified in theaccomp

26、anying material or process specification of the materialbeing tested, 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 m

27、entionedin 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 rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committ

28、ee 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 standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meet

29、ing 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 Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, P

30、O 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).5Methyl-n-propyl ketone, 90% purity or betterF 1111 08b2