1、Designation: D7095 04 (Reapproved 2014)D7095 17Standard 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
2、year oforiginal 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 Me
3、thod D130 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
4、 place of the initial and final polishing techniquesdescribed in Test Method D130. Thirdly, this test method involves a shorter analysis time of 45minutes 45 min for all product types as compared to the Test Method D130 method requirements,which are longer; for example, two or three hours.1. Scope S
5、cope*1.1 This test method covers the determination of the corrosiveness to copper of aviation gasoline, aviation turbine fuel,automotive gasoline, natural gasoline, or other hydrocarbons having a vapor pressure no greater than 124 kPa (18 psi), 124 kPa(18 psi), cleaners (for example, Stoddard solven
6、t), kerosine, diesel fuel, distillate fuel oil, lubricating oil, and other petroleumproducts.1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are provided for information only.1.2.1 ExceptionThe values in parentheses are provided for information only.1.
7、3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine theapplicability of regulatory limitations pri
8、or to use. For specific warning statements, see 6.1, 10.1.1, and Annex A2.1.4 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Reco
9、mmendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2B152/B152M Specification for Copper Sheet, Strip, Plate, and Rolled BarD130 Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip TestD39
10、6 Specification for Fuel OilsD975 Specification for Diesel Fuel OilsD1655 Specification for Aviation Turbine FuelsD1838 Test Method for Copper Strip Corrosion by Liquefied Petroleum (LP) GasesD4057 Practice for Manual Sampling of Petroleum and Petroleum ProductsD4177 Practice for Automatic Sampling
11、of Petroleum and Petroleum ProductsD6615 Specification for Jet B Wide-Cut Aviation Turbine FuelE1 Specification for ASTM Liquid-in-Glass Thermometers1 This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility
12、of SubcommitteeD02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.Current edition approved May 1, 2014Oct. 1, 2017. Published July 2014October 2017. Originally approved in 2004. Last previous edition approved in 20092014 asD7095 - 04 (2009).D7095 04 (2014). DOI: 10.1520/D7095-04R14.10
13、.1520/D7095-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is i
14、ntended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the cu
15、rrent versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.2 ASTM Adjuncts:ASTM Copper
16、 Strip Corrosion Standard33. Summary of Test Method3.1 A polished copper foil strip is immersed in a specific volume of the sample being tested and heated under conditions oftemperature and time that are specific to the class of material being tested. At the end of the heating period, the copper foi
17、l stripis removed, washed, and the color and tarnish level assessed against the ASTM Copper Strip Corrosion Standard.4. Significance and Use4.1 Crude petroleum contains sulfur compounds, most of which are removed during refining. However, of the sulfur compoundsremaining in the petroleum product, so
18、me can have a corroding action on various metals, including copper, and this corrosivityis not necessarily related to the total sulfur content. The effect can vary according to the chemical types of sulfur compoundspresent. This copper foil strip corrosion test is designed to assess the relative deg
19、ree of corrosivity of a petroleum product towardscopper and copper-containing alloys using a shorter test duration than that specified in Test Method D130.4.2 Some sulfur species may become corrosive to copper only at higher temperatures. Thus, higher test temperatures,particularly 100C (212F),100 C
20、 (212 F), may be used to test some products by the pressure vessel procedure.5. Apparatus5.1 Copper Foil Strip Corrosion Test Pressure Vessel, constructed from stainless steel according to the dimensions given in Fig.1. The vessel shall be capable of withstanding a test pressure of 700 kPa gage (100
21、 psi). 700 kPa gauge (100 psi). Alternativedesigns for the vessels cap and synthetic rubber gasket may be used provided that the internal dimensions of the vessel are thesame as those shown in Fig. 1. The internal dimensions of the pressure vessel are such that a nominal 25 by 150 mm (1 by 6 in.)25
22、mm by 150 mm (1 in. by 6 in.) test tube can be placed inside the pressure vessel.5.2 Test Tubes, of borosilicate glass with nominal dimensions of 25 by 150 mm (1 by 6 in.). 25 mm by 150 mm (1 in. by 6 in.).The internal dimensions shall be checked as acceptable by use of a copper foil strip (see 6.3)
23、.When 30 mL30 mLof liquid is addedto the test tube with the copper foil strip in it, a minimum of 5 mm 5 mm of liquid shall be above the top surface of the copperfoil strip.5.3 Test Baths:5.3.1 GeneralAll test baths, whether liquid or solid block, shall be capable of maintaining the test temperature
24、 to within 61C (2F) 61 C (2 F) of the required test temperature, for the entire duration 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 pressure vessels(see 5.1) completely during the test. It shall be fitted with suitable support
25、s to hold each pressure vessel in a vertical position whensubmerged.5.3.3 Bath(s) Used for Test TubesBath(s) shall be fitted with suitable supports to hold each test tube (see 5.2) in a verticalposition to a depth of about 100 mm (4 in.) 100 mm (4 in.) as measured from the bottom of the test tube to
26、 the bath surface. Asa liquid bath medium, water and oil have been found satisfactory and controllable at the specified test temperature and durationrequired by the test procedure. Solid block baths shall meet the test temperature control, test duration, and immersion conditionsrequired by the test
27、procedure, and shall be checked for temperature measurement (heat transfer) for each product class by runningtests on tubes filled with 30 mL 30 mL of product plus a copper foil strip of the given nominal dimensions, plus a temperaturesensor.5.4 Temperature Sensing and Monitoring Device (TSMD), capa
28、ble of sensing and monitoring the desired test temperature in thebath to within an accuracy of 6 1C (2F) 61 C (2 F) or better. The ASTM 12C (12F) (see Specification E1) or IP64C (64F)total immersion thermometer has been found suitable for use in the test. If used, no more than 10 mm (0.4 in.) of the
29、 mercuryshould extend above the surface of the bath at the test temperature.5.5 Timing Device, electronic or manual, capable of accurately measuring the test duration within the allowable tolerance.5.6 Forceps, with either stainless steel or polytetrafluoroethylene (PTFE) tips, have been found suita
30、ble for use in handling thecopper foil strips.5.7 Optional Equipment:5.7.1 Polishing Vise, for holding the copper foil strip firmly without marring the edges while polishing. Any convenient typeof holder (see X1.2) may be used, provided that the copper foil strip is held tightly and that the surface
31、 of the copper foil strip beingpolished is supported above the surface of the holder.5.7.2 Viewing Tubes, flat glass test tubes, are convenient for protecting corroded copper foil strips for close inspection or storage(see X1.1 for the description of a flat-glass viewing tube).The viewing tube shall
32、 be of such dimensions as to allow the introductionof a copper foil strip (see 6.3) and made of glass free of striae or similar defects.3 Available from ASTM International Headquarters. Request Adjunct No. ADJD0130. Names of suppliers in the United Kingdom can be obtained from Energy Institute,61 Ne
33、w Cavendish St., London, WIM 8AR, United Kingdom. One Master Standard is held at Energy Institute for reference.D7095 172NOTE 1Material: stainless steel; welded construction; maximum test gagegauge pressure: 700 kPa700 kPaNOTE 2Key:1 Lifting eye2 Wide groove for pressure relief3 Knurled cap4 Twelve
34、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 the Co
35、pper Foil Strip Corrosion TestD7095 1736. Reagents and Materials6.1 Wash SolventAny volatile, less than 55 mg mg/kg kg sulfur hydrocarbon solvent may be used, provided that it shows notarnish at all when tested for 3 h at 50C (122F).3 h at 50 C (122 F). 2,2,4-trimethylpentane (isooctane) of minimum
36、99.75 %purity is the referee solvent and should be used in case of dispute. (WarningWarningExtremelyExtremely flammable; seeA2.1).6.2 Surface Preparation / Polishing Preparation/Polishing MaterialsScouring-pad made of polyester material that is free ofdetergents or spongy material, containing alumin
37、um oxide as a scouring-aid. 3M Scotch Brite 86 (3M No. 05509),4,5 approximately400-grit,400 grit, green-colored, heavy-duty, hand-pad, has been found suitable for use. Other commercially available 400-grit400 grit pads may be used, provided those are also made of polyester material, free of detergen
38、ts or spongy material, containingaluminum oxide as a scouring-aid.NOTE 13M Scotch Brite 86 pads are generally available in the form of 229229 mm by 152 by 9.5 mm (9 by 6152 mm by 9.5 mm (9 in. by 6 in. by38 in.) in.) thick pads. For ease of handling and polishing, it is recommended that the pads be
39、cut so that the dimensions of the scouring-pads are about114114 mm by 38 by 9.5 mm (4-38 mm by 9.5 mm (412 in. by 1-112 in. by 38 in.). in.).6.3 Copper Foil StripsUse copper foil strips approximately 12.5 mm 12.5 mm (12 in.) in.) wide, and 0.526 to 0.541 mm(0.0207 0.526 mm to 0.541 mm (0.0207 in. to
40、 0.0213 in.) thick. Cut, straight and smooth, using a sharp tin-snip or any othermetal-cutting device, approximately 75 mm (3 in.) (3 in.) long strips, from a 30.5 m (100 ft) 30.5 m (100 ft) roll of soft-temper,commercial grade Alloy 110, composed of 99.9 % copper, meeting Specification B152/B152M s
41、pecifications.6,5 Discard copperfoil 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 in contact with the individual during handling or poli
42、shing, or both.7. Corrosion Standards7.1 ASTM Copper Strip Corrosion Standards3consist of reproductions in color of typical test strips representing increasingdegrees of tarnish and corrosion, the reproductions being encased for protection in plastic and made up in the form of a plaque.7.1.1 Keep th
43、e plastic-encasedASTM Copper Strip Corrosion Standards protected from light to avoid the possibility of fading.Inspect for fading by comparing two different plaques, one of which has been carefully protected from light (for example, newplaque). Observe both sets in diffused daylight (or equivalent)
44、first from a point directly above and then from an angle of 45. Ifany evidence of fading is observed, particularly at the left-hand end of the plaque, it is suggested that the one that is the more fadedwith respect to the other be discarded.7.1.1.1 Alternatively, place a suitably sized opaque strip
45、(for example, 20 mm 20 mm (34 in.) in.) black electrical tape) acrossthe top of the colored portion of the plaque when initially purchased.At intervals remove the opaque strip and observe. When thereis any evidence of fading of the exposed portion, the standards shall be replaced.7.1.1.2 These plaqu
46、es are full-color reproductions of typical strips. They have been printed on aluminum sheets by a four-colorprocess and are encased in plastic for protection. Directions for their use are given on the reverse side of each plaque.7.1.2 If the surface of the plastic cover shows excessive scratching, i
47、t is suggested that the plaque be replaced.8. Samples8.1 In accordance with Practice D4057 or Practice D4177, or both, it is particularly important that all types of fuel samples thatpass a low-tarnish strip classification, be collected in clean, dark glass bottles, plastic bottles, or other suitabl
48、e containers that willnot affect the corrosive properties of the fuel. Avoid the use of tin-plate containers for collection of samples, since experience hasshown that they can contribute to the corrosiveness of the sample.8.2 Fill the containers as completely as possible and close them immediately a
49、fter taking the sample. Adequate headspace inthe container is necessary to provide room for possible thermal expansion during transport. It is recommended that volatile samplesbe filled between 7070 % and 80 % of the containers capacity. Exercise care during sampling to protect the samples from exposureto direct sunlight or even diffused daylight. Carry out the test as soon as possible after receipt in the laboratory and immediatelyafter opening the container.8.3 If suspended water (that is, haze) is observed in the sample, dry by filteri
