1、Designation: D7095 04 (Reapproved 2009)Standard Test Method forRapid Determination of Corrosiveness to Copper fromPetroleum Products Using a Disposable Copper Foil Strip1This standard is issued under the fixed designation D7095; the number immediately following the designation indicates the year ofo
2、riginal adoption or, in the case of revision, 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.INTRODUCTIONThis test method is similar in nature to the Test Method D13
3、0 test method, but involves three majordifferences. Firstly, a single-use copper foil strip is used in place of the Test Method D130 multi-usecopper strip. Secondly, a different polishing technique is used in preparing the copper foil strip, whichuses a commercially available scouring-pad in place o
4、f the initial and final polishing techniquesdescribed in Test Method D130. Thirdly, this test method involves a shorter analysis time of 45minutes for all product types as compared to the Test Method D130 method requirements, which arelonger; for example, two or three hours.1. Scope1.1 This test met
5、hod covers the determination of the corro-siveness to copper of aviation gasoline, aviation turbine fuel,automotive gasoline, natural gasoline, or other hydrocarbonshaving a vapor pressure no greater than 124 kPa (18 psi),cleaners (for example, Stoddard solvent), kerosine, diesel fuel,distillate fue
6、l oil, lubricating oil, and other petroleum products.1.2 The values stated in SI units are to be regarded as thestandard. The values in parentheses are provided for informa-tion only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is there
7、sponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specificwarning statements, see 6.1, 10.1.1, and Annex A2.2. Referenced Documents2.1 ASTM Standards:2B152/B152M Specification f
8、or Copper Sheet, Strip, Plate,and Rolled BarD130 Test Method for Corrosiveness to Copper from Pe-troleum Products by Copper Strip TestD396 Specification for Fuel OilsD975 Specification for Diesel Fuel OilsD1655 Specification for Aviation Turbine FuelsD1838 Test Method for Copper Strip Corrosion by L
9、ique-fied Petroleum (LP) GasesD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD6615 Specification for Jet B Wide-Cut Aviation TurbineFuelE1 Specification for ASTM Liquid-in-Glass Thermometers2.2 ASTM Adjunct
10、s:ASTM Copper Strip Corrosion Standard33. Summary of Test Method3.1 A polished copper foil strip is immersed in a specificvolume of the sample being tested and heated under conditionsof temperature and time that are specific to the class of materialbeing tested. At the end of the heating period, the
11、 copper foilstrip is removed, washed, and the color and tarnish levelassessed against the ASTM Copper Strip Corrosion Standard.4. Significance and Use4.1 Crude petroleum contains sulfur compounds, most ofwhich are removed during refining. However, of the sulfurcompounds remaining in the petroleum pr
12、oduct, some can havea corroding action on various metals, including copper, and this1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.
13、Current edition approved Dec. 1, 2009. Published February 2010. Originallyapproved in 2004. Last previous edition approved in 2004 as D7095-04. DOI:10.1520/D7095-04R09.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual
14、 Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from ASTM International Headquarters. Request Adjunct No.ADJD0130. Names of suppliers in the United Kingdom can be obtained fromEnergy Institute, 61 New Cavendish St., London, WIM 8A
15、R, United Kingdom. OneMaster Standard is held at Energy Institute for reference.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.corrosivity is not necessarily related to the total sulfur content.The effect can vary according to the c
16、hemical types of sulfurcompounds present. This copper foil strip corrosion test isdesigned to assess the relative degree of corrosivity of apetroleum product towards copper and copper-containing al-loys using a shorter test duration than that specified in TestMethod D130.4.2 Some sulfur species may
17、become corrosive to copperonly at higher temperatures. Thus, higher test temperatures,particularly 100C (212F), may be used to test some productsby the pressure vessel procedure.5. Apparatus5.1 Copper Foil Strip Corrosion Test Pressure Vessel, con-structed from stainless steel according to the dimen
18、sions givenin Fig. 1. The vessel shall be capable of withstanding a testpressure of 700 kPa gage (100 psi). Alternative designs for thevessels cap and synthetic rubber gasket may be used providedthat the internal dimensions of the vessel are the same as thoseshown in Fig. 1. The internal dimensions
19、of the pressure vesselare such that a nominal 25 by 150 mm (1 by 6 in.) test tube canbe placed inside the pressure vessel.5.2 Test Tubes, of borosilicate glass with nominal dimen-sions of 25 by 150 mm (1 by 6 in.). The internal dimensionsshall be checked as acceptable by use of a copper foil strip (
20、see6.3). When 30 mL of liquid is added to the test tube with thecopper foil strip in it, a minimum of 5 mm of liquid shall beabove the top surface of the copper foil strip.5.3 Test Baths:5.3.1 GeneralAll test baths, whether liquid or solid block,shall be capable of maintaining the test temperature t
21、o within6 1C (2F) of the required test temperature, for the entireduration of the test.5.3.2 Bath(s) Used for Submerging Pressure Vessel(s)Bath(s) shall be deep enough to submerge one or more pressurevessels (see 5.1) completely during the test. It shall be fittedwith suitable supports to hold each
22、pressure vessel in a verticalposition when submerged.5.3.3 Bath(s) Used for Test TubesBath(s) shall be fittedwith suitable supports to hold each test tube (see 5.2)inavertical position to a depth of about 100 mm (4 in.) asmeasured from the bottom of the test tube to the bath surface.As a liquid bath
23、 medium, water and oil have been foundsatisfactory and controllable at the specified test temperatureand duration required by the test procedure. Solid block bathsshall meet the test temperature control, test duration, andimmersion conditions required by the test procedure, and shallbe checked for t
24、emperature measurement (heat transfer) foreach product class by running tests on tubes filled with 30 mLof product plus a copper foil strip of the given nominaldimensions, plus a temperature sensor.5.4 Temperature Sensing and Monitoring Device (TSMD),capable of sensing and monitoring the desired tes
25、t temperaturein the bath to within an accuracy of 6 1C (2F) or better. TheASTM 12C (12F) (see Specification E1) or IP64C (64F) totalimmersion thermometer has been found suitable for use in thetest. If used, no more than 10 mm (0.4 in.) of the mercuryshould extend above the surface of the bath at the
26、 testtemperature.5.5 Timing Device, electronic or manual, capable of accu-rately measuring the test duration within the allowable toler-ance.NOTE 1Material: stainless steel; welded construction; maximum testgage pressure: 700 kPaNOTE 2Key:1 Lifting eye2 Wide groove for pressure relief3 Knurled cap4
27、Twelve threads per inch NF thread or equivalent5 Camber inside cap to protect “O” ring when closing pressure vessel6 Synthetic rubber “O” ring without free sulfur7 Seamless tubeNOTE 3Dimensions in millimetres.NOTE 4All dimensions without tolerance limits are nominal values.FIG. 1 Pressure Vessel for
28、 the Copper Foil Strip Corrosion TestD7095 04 (2009)25.6 Forceps, with either stainless steel or polytetrafluoroet-hylene (PTFE) tips, have been found suitable for use inhandling the copper foil strips.5.7 Optional Equipment:5.7.1 Polishing Vise, for holding the copper foil strip firmlywithout marri
29、ng the edges while polishing. Any convenienttype of holder (see X1.2) may be used, provided that the copperfoil strip is held tightly and that the surface of the copper foilstrip being polished is supported above the surface of theholder.5.7.2 Viewing Tubes, flat glass test tubes, are convenient for
30、protecting corroded copper foil strips for close inspection orstorage (see X1.1 for the description of a flat-glass viewingtube). The viewing tube shall be of such dimensions as to allowthe introduction of a copper foil strip (see 6.3) and made ofglass free of striae or similar defects.6. Reagents a
31、nd Materials6.1 Wash SolventAny volatile, less than 5 mg/kg sulfurhydrocarbon solvent may be used, provided that it shows notarnish at all when tested for3hat50C (122F). 2,2,4-trimethylpentane (isooctane) of minimum 99.75 % purity is thereferee solvent and should be used in case of dispute.(WarningE
32、xtremely flammable; see A2.1).6.2 Surface Preparation / Polishing MaterialsScouring-pad made of polyester material that is free of detergents orspongy material, containing aluminum oxide as a scouring-aid.3M Scotch Brite 86 (3M No. 05509),4,5approximately 400-grit, green-colored, heavy-duty, hand-pa
33、d, has been foundsuitable for use. Other commercially available 400-grit padsmay be used, provided those are also made of polyestermaterial, free of detergents or spongy material, containingaluminum oxide as a scouring-aid.NOTE 13M Scotch Brite 86 pads are generally available in the formof 229 by 15
34、2 by 9.5 mm (9 by 6 by38 in.) thick pads. For ease ofhandling and polishing, it is recommended that the pads be cut so that thedimensions of the scouring-pads are about 114 by 38 by 9.5 mm (4-12 by1-12 by38 in.).6.3 Copper Foil StripsUse copper foil strips approxi-mately 12.5 mm (12 in.) wide, and 0
35、.526 to 0.541 mm (0.0207to 0.0213 in.) thick. Cut, straight and smooth, using a sharptin-snip or any other metal-cutting device5,6approximately 75mm (3 in.) long strips, from a 30.5 m (100 ft) roll ofsoft-temper, commercial grade Alloy 110, composed of 99.9 %copper, meeting Specification B152/B152M
36、specifications.5,7Discard copper foil strip after each single use.6.4 Ashless Filter Paper or Disposable Gloves or Forceps(with either Stainless Steel or Polytetrafluoroethylene (PTFE)Tips, for use in protecting the copper foil strip from coming incontact with the individual during handling or polis
37、hing, orboth.7. Corrosion Standards7.1 ASTM Copper Strip Corrosion Standards3consist ofreproductions in color of typical test strips representing in-creasing degrees of tarnish and corrosion, the reproductionsbeing encased for protection in plastic and made up in the formof a plaque.7.1.1 Keep the p
38、lastic-encased ASTM Copper Strip Corro-sion Standards protected from light to avoid the possibility offading. Inspect for fading by comparing two different plaques,one of which has been carefully protected from light (forexample, new plaque). Observe both sets in diffused daylight(or equivalent) fir
39、st from a point directly above and then froman angle of 45. If any evidence of fading is observed,particularly at the left-hand end of the plaque, it is suggestedthat the one that is the more faded with respect to the other bediscarded.7.1.1.1 Alternatively, place a suitably sized opaque strip (fore
40、xample, 20 mm (34 in.) black electrical tape) across the top ofthe colored portion of the plaque when initially purchased. Atintervals remove the opaque strip and observe. When there isany evidence of fading of the exposed portion, the standardsshall be replaced.7.1.1.2 These plaques are full-color
41、reproductions of typicalstrips. They have been printed on aluminum sheets by afour-color process and are encased in plastic for protection.Directions for their use are given on the reverse side of eachplaque.7.1.2 If the surface of the plastic cover shows excessivescratching, it is suggested that th
42、e plaque be replaced.8. Samples8.1 In accordance with Practice D4057 or Practice D4177,or both, it is particularly important that all types of fuelsamples that pass a low-tarnish strip classification, be collectedin clean, dark glass bottles, plastic bottles, or other suitablecontainers that will no
43、t affect the corrosive properties of thefuel. Avoid the use of tin-plate containers for collection ofsamples, since experience has shown that they can contributeto the corrosiveness of the sample.8.2 Fill the containers as completely as possible and closethem immediately after taking the sample.Adeq
44、uate headspacein the container is necessary to provide room for possiblethermal expansion during transport. It is recommended thatvolatile samples be filled between 70 and 80 % of the contain-ers capacity. Exercise care during sampling to protect thesamples from exposure to direct sunlight or even d
45、iffuseddaylight. Carry out the test as soon as possible after receipt inthe laboratory and immediately after opening the container.8.3 If suspended water (that is, haze) is observed in thesample, dry by filtering a sufficient volume of sample througha medium rapid qualitative filter, into the prescr
46、ibed clean, drytest tube. Carry out this operation in a darkened room or undera light-protected shield.4The sole source of supply of the apparatus, Cat. No. 19-047-249, known to thecommittee at this time is Fisher Scientific Co., USA ().5If you are aware of alternative suppliers, please provide this
47、 information toASTM International Headquarters. Your comments will receive careful consider-ation at a meeting of the responsible technical committee,1which you may attend.6The sole source of supply of the heavy-duty 6 in. shear, Part No. 82818, knownto the committee at this time is Micro-mark, 340
48、Snyder Ave., Berkeley Heights, NJ07922-1595, USA.7The sole source of supply of the apparatus, Part No. 9053K21, known to thecommittee at this time is McMaster-Carr Supply Company, P.O. Box 4355, Chicago,IL 60680-4355, USA.D7095 04 (2009)38.3.1 Contact of the copper foil strip with water before,durin
49、g, or after completion of the test run will cause staining,making it difficult to evaluate the copper foil strips.9. Preparation of Test Strips9.1 Surface PreparationTo prevent possible surface con-tamination during preparation, do not allow fingers to come incontact with the copper foil strip. Wear disposable gloves orhold the strip in the fingers protected with ashless filter paper.9.1.1 Using a new/unused portion of a small strip of the400-grit scouring-pad (see Note 1) first polish the ends, thenthe sides of the copper foil strip g
