ASTM F483-1998(2002)e1 Standard Test Method for Total Immersion Corrosion Test for Aircraft Maintenance Chemicals《飞行器保养用化学药品的完全浸没腐蚀试验方法》.pdf

《ASTM F483-1998(2002)e1 Standard Test Method for Total Immersion Corrosion Test for Aircraft Maintenance Chemicals《飞行器保养用化学药品的完全浸没腐蚀试验方法》.pdf》由会员分享，可在线阅读，更多相关《ASTM F483-1998(2002)e1 Standard Test Method for Total Immersion Corrosion Test for Aircraft Maintenance Chemicals《飞行器保养用化学药品的完全浸没腐蚀试验方法》.pdf（4页珍藏版）》请在麦多课文档分享上搜索。

1、Designation: F 483 98 (Reapproved 2002)e1Standard Test Method forTotal Immersion Corrosion Test for Aircraft MaintenanceChemicals1This standard is issued under the fixed designation F 483; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revi

2、sion, the 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.e1NOTEEditorial changes were m

3、ade throughout in September 2002.1. Scope1.1 This test method covers the determination of the corro-siveness of aircraft maintenance chemicals on aircraft metalswith time under conditions of total immersion by a combina-tion of weight change measurements and visual qualitativedetermination of change

4、.1.2 The values stated in SI units are to be regarded asstandard. The values in parentheses are for information only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priat

5、e safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:D 235 Specification for Mineral Spirits (Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)2D 329 Specification for Acetone2D 740 Specification for Methyl

6、 Ethyl Ketone2D 1193 Specification for Reagent Water3E 1 Specification for ASTM Thermometers43. Significance and Use3.1 Many aircraft maintenance chemicals are used on com-ponents and structures which would be adversely affected byexcessive dimensional change. This test method screens thesechemicals

7、 to ensure compliance with specified weight changecriteria.4. Apparatus4.1 Wide-Mouth Sealable Glass Jar or Stoppered Flask ofSuitable SizeThe glass jar or flask should be so chosen sothat the specimens will remain fully immersed in a verticalposition during testing and the ratio of area of immersed

8、 metalto volume of solution will be in accordance with 8.1.4.1.1 WarningSome aircraft maintenance chemicalswhen heated have high vapor pressures or may produce gasesduring testing. Suitable precautions should be taken to preventthe containing vessel from exploding or the vessel should be sochosen as

9、 to withstand the resulting pressure.4.2 Specimen-Supporting DeviceA glass of fluorocarbonplastic supporting system designed to keep the specimen fullyimmersed while ensuring free contact with the solution, anddesigned to isolate the specimens from each other physically.4.3 For materials containing

10、low boiling point solvents, ameans of preventing evaporation losses shall be used.4.4 Constant-Temperature DeviceAny suitable regulatedheating device (mantle, hot plate, or bath) may be used tomaintain the solution at the required temperature.4.5 Thermometer, having a range from 18 to 150C (0 to302F

11、) and conforming to requirements for Thermometer 1F inaccordance with Specification E 1.4.6 Oven, low temperature explosion-proof, capable ofmaintaining 38 6 3C (100 6 5F) through 120 6 5C (248 65F).5. Reagents and Materials5.1 Acetoneconforming to Specification D 329.5.2 Methyl Ethyl Ketoneconformi

12、ng to SpecificationD 740.5.3 Mineral Spirits, Type IIconforming to SpecificationD 235.6. Test Specimens6.1 Take test specimens of a given alloy from the same sheetstock, which shall be in new or like-new condition, andmeasure 50.8 by 25.4 by 1.6 mm (2 by 1 by 0.06 in.) with a1This test method is und

13、er 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 approved Oct. 10, 1998. Published March 1999. Originallypublished as F 483 77. Last previous edition F 483

14、 90 (Reapproved 1991)e1.2Annual Book of ASTM Standards, Vol 06.04.3Annual Book of ASTM Standards, Vol 11.01.4Annual Book of ASTM Standards, Vol 14.03.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2-mm (0.125-in.) diameter mountin

15、g hole suitably located atone end of the specimen. Test three replicate specimens in eachconcentration of maintenance chemical solution in accordancewith 8.2.1. Take the total area of the specimen as 28.2 cm2(4.4in.2).6.1.1 Identify each panel with Numbers 1, 2, 3, or 4.7. Precleaning Test Specimens

16、7.1 Immerse the test specimens in a beaker of mineralspirits, Type II, conforming to Specification D 235 at roomtemperature and swab the surface of the individual specimenthoroughly using clean forceps to hold the test specimen andthe cotton swab.7.2 Shake off excess solvent. Transfer and immerse th

17、e testspecimens separately several times in a beaker of methyl ethylketone.7.3 Shake off excess methyl ethyl ketone and dry in avacuum desiccator or in a low-temperature oven at 120 6 5C(2486 5F) for 15 min. (If oven dried, remove to dessicatorand cool to ambient.)8. Conditioning8.1 Ratio of Area of

18、 Immersed Metal to Volume ofSolutionThe ratio of area of immersed metal to volume ofsolution shall be 8 mL per cm2. Use fresh solution for each setof replicates.8.2 Solution Concentration:8.2.1 Unless otherwise specified, test the specimens insolutions of the maintenance chemical in the concentrated

19、as-received condition and at the recommended use dilutionusing water that conforms to Specification D 1193, Type IV. Incase the maintenance chemical is not soluble to the extentnoted, record this fact and continue with the test.8.2.2 If water is not used as the diluent, record the type andspecificat

20、ion of diluent used in the test.8.3 TemperatureUnless otherwise specified, the test tem-perature shall be 38 6 3C (100 6 5F).9. Procedure9.1 Weigh three of four specimens of the same alloy to thenearest 0.1 mg.9.2 Immerse three weighed specimens of each alloy in thetest solution at the prescribed te

21、mperature. Place only speci-mens of the same alloy in the containing vessel. Maintain at therequired temperature for the prescribed exposure period. Re-tain the fourth specimen of each alloy for comparison pur-poses.9.3 At the end of 24 h, remove the test specimens andproceed as follows:9.3.1 Rinse

22、thoroughly under hot tap water, 49 to 60C (120to 140F) . Follow with a rinse in water conforming toSpecification D 1193, Type IV at room temperature.9.3.2 Rinse with a stream of acetone, conforming to Speci-fication D 329, from a wash bottle and oven dry at 120C(250F), dessicate until cooled to ambi

23、ent, weigh and record.9.3.3 Then examine for and record on a form as illustratedin Appendix X1 in the 24-h column the following visiblechanges in comparison with the fourth virgin specimen of eachalloy.9.3.3.1 Discoloration and dulling,9.3.3.2 Etching,9.3.3.3 Presence of accretions and relative amou

24、nts,9.3.3.4 Pitting, and9.3.3.5 Presence of selective or localized attack.9.4 Immerse the panels in the same test solution for a further144 h, then repeat 9.3.1-9.3.3.5.9.5 Reweigh specimens to nearest 0.1 g, calculate weightloss or gain, and record in 168-h column.10. Report10.1 Report the data for

25、 each test performed on a form asillustrated in Appendix X1.11. Precision and Bias11.1 The precision of the procedure in Test Method F 483for measuring total immersion corrosion is being determined.12. Keywords12.1 in concentrate; in use dilution; maintenance chemicals;temperature control; time cont

26、rol; total immersion corrosion;visual corrosive deterioration; weight change criteriaAPPENDIXX1. RECOMMENDED REPORT FORMX1.1 Report test results on a form as illustrated in Fig.X1.1.F 483 98 (2002)e12FIG. X1.1 Report FormF 483 98 (2002)e13ASTM International takes no position respecting the validity

27、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 rights, are entirely their own responsibility.This standard is subject t

28、o 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 standardsand should be addressed to ASTM International Headquarters.

29、 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 Committee on Standards, at the address shown below.This standard is

30、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).F 483 98 (2002)e14