1、Designation:D84909 Designation: D849 11Standard Test Method forCopper Strip Corrosion by Industrial AromaticHydrocarbons1This standard is issued under the fixed designation D849; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、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. Scope*1.1 This test method covers the
3、corrosiveness of industrial aromatic hydrocarbons to a copper strip.NOTE 1For a similar copper strip test applicable to other petroleum products, see Test Method D130 and Test Method D1838.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in
4、 this standard.1.3 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 and health practices and determine the applicability of regulatorylimitations prior to use. F
5、or specific hazard statements, see Section 8.2. 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 TestD1838 Test Method for Copper Strip Corrosion by Liqu
6、efied Petroleum (LP) GasesD4790 Terminology of Aromatic Hydrocarbons and Related ChemicalsD6809Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related MaterialsTerminology of Aromatic Hydrocarbons and Related Chemicals2.2 Other Documents:3OSHA Regulations, 29
7、 CFR paragraphs 1910.1000 and 1910.12002.3 ASTM Adjuncts:ASTM Copper Strip Corrosion Standards (13 photo lithographed aluminum strips; includes Test Method D130)43. Terminology3.1 See Terminology D4790 for definition of terms used in this test method.4. Summary of Test Method4.1 A polished copper st
8、rip is immersed in 200 mL of specimen in a flask with a condenser and placed in boiling water for 30min. At the end of this period, the copper strip is removed and compared with the ASTM Copper Strip Corrosion Standards.5. Significance and Use5.1 This test method is suitable for setting specificatio
9、ns, for use as an internal quality control tool, and for use in developmentor research work on industrial aromatic hydrocarbons and related materials. It also gives an indication of the presence of certaincorrosive substances which may corrode equipment, such as acidic compounds or sulfur compounds.
10、1This test method is under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of SubcommitteeD16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives.Current edition approved Dec.Feb. 1, 2009.2011. Published January 20
11、10.February 2011. Originally approved in 1945. Last previous edition approved in 20052009 asD849 059. DOI: 10.1520/D0849-09.10.1520/D0849-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvol
12、ume information, refer to the standards Document Summary page on the ASTM website.3Available from U.S. Government Printing Office Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.gov.4Available from ASTM International Headquarters. Reque
13、st Adjunct No. ADJD0130. Names of suppliers in the United Kingdom can be obtained from the Institute ofPetroleum. Two master standards are held by the IP for reference.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes ha
14、ve 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 current versionof the standard as published by ASTM is to be considered the official do
15、cument.*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Apparatus6.1 Flask, of sufficient size to allow for refluxing 200 mL specimen, of chemically resistant glass w
16、ith flat bottom and vialmouth.6.2 Glass Condenser, length may vary, with the inside diameter of the condenser tube not less than 10 mm. A cork is used toconnect the flask with the condenser. A condenser and flask with ground-glass joints may also be used.6.3 Strip Polishing Vise, (optional), to hold
17、 the copper strip firmly without marring the edges. For convenient vises see TestMethod D130.6.4 Water Bath, of convenient design, able to maintain boiling water such that the contents of the flask are submerged duringthe test.7. Reagents and Materials7.1 Wash SolventAny volatile, sulfur-free hydroc
18、arbon solvent may be used provided that it shows no tarnish at all whentested at 100C for 1 h. Iso octane (WarningSee 8.2) is a suitable solvent.7.2 Surface Preparation/Polishing Materials, 00 grade or finer steel wool or silicon carbide grit paper or cloth of varyingdegrees of fineness including 65
19、-m (240-grit) grade; also a supply of 105-m (150-mesh) size silicon carbide grain or powderand absorbent cotton (cotton wool). A commercial grade is suitable, but pharmaceutical grade is most commonly available and isacceptable.7.3 Copper StripsUse strips 12.5 mm 6 1 mm wide, 1.5 to 3.5 mm thick, cu
20、t 75 mm 6 3 mm long from smooth-surfaced,hard-tempered, cold-finished copper of 99.9 + % purity. Electrical bus-bar stock is generally suitable (hard-temper, cold-finishedtype-electrolytic tough pitch (ETP) copper conforming to UNS C11000 in Specification B152/B152M. Drill a 3.2 mm 6 0.5 mmhole appr
21、oximately 3.2 mm from one end in the center of the strip. The strips may be used repeatedly but should be discarded whensurfaces become deformed on handling.7.4 Copper wire, soft, about 150 mm in length.7.5 ASTM Copper Strip Corrosion Standards, consisting of reproductions in color of typical test s
22、trips representing increasingdegrees of tarnish and corrosion. The reproductions are encased in plastic in the form of a plaque. Instructions for care and useare given on the reverse side of each plaque and in Test Method D130.7.6 Ashless Filter Paper or Disposable Gloves, for use in protecting the
23、copper strip from coming in contact with the individualduring final polishing.8. Hazards8.1 Consult current OSHA regulations, suppliers Material Safety Data Sheets, and local regulations for all materials used inthis test method.8.2 Isooctane is Extremely Flammable. Harmful if inhaled. Vapors may ca
24、use flash fire. Keep away from heat, sparks, and openflame. Keep container closed. Use with adequate ventilation. Avoid buildup of vapors and eliminate all sources of ignition,especially non-explosion-proof electrical apparatus and heaters. Avoid prolonged breathing of vapor or spray mist. Avoidprol
25、onged or repeated skin contact.9. Preparation of Strips9.1 Surface PreparationRemove all surface blemishes from all six sides of the strip obtained from a previous analysis (seeNote 2). One way to accomplish this is to use 00 grade or finer steel wool or silicon carbide grit paper or cloth of such d
26、egreesof fineness as are needed to accomplish the desired results efficiently. Finish with 65-m (240-grit) silicon-carbide paper or cloth,removing all marks that may have been made by other grades of paper used previously. Ensure the prepared copper strip isprotected from oxidation prior to final pr
27、eparation, such as by immersing the strip in wash solvent from which it can be withdrawnimmediately for final preparation (polishing) or in which it can be stored for future use.NOTE 2Only final polishing (see 9.2) is necessary for commercially purchased pre-polished strips.NOTE 3As a practical manu
28、al polishing procedure, place a sheet of the paper on a flat surface, moisten it with wash solvent, and rub the strip againstthe paper with a circular motion, protecting the strip from contact with the fingers by using an ashless filter paper, other suitable material, or wearingdisposable gloves. Al
29、ternatively, the strip may be prepared by use of motor-driven machines using appropriate grades of dry paper or cloth.9.2 Final PolishingFor strips prepared in 9.1 or new strips being used for the first time, remove a strip from its protectedlocation, such as by removing it from the wash solvent. To
30、 prevent possible surface contamination during final preparation, do notallow fingers to come in direct contact with the copper strips, such as by wearing disposable gloves or holding the strips in thefingers protected with ashless filter paper. Polish first the ends and then the sides with the 105-
31、m (150-mesh) silicon-carbide grainspicked up from a suitable container with a pad of absorbent cotton or cloth moistened with a drop of wash solvent. Wipe vigorouslywith fresh pads of absorbent cotton or cloth and subsequently handle only with stainless-steel forceps, tongs, or other suitabledevices
32、 to avoid touching with the fingers. Polish the main surfaces with silicon carbide grains on absorbent cotton or cloth. Rubin the direction of the long axis of the strip, carrying the stroke beyond the end of the strip before reversing the direction. Cleanall metal dust from the strip by rubbing vig
33、orously with clean pads of absorbent cotton or cloth until the material remains unsoiled.When the strip is clean, immediately immerse the strip in the specimen flask.D849 112NOTE 4It is important to polish the whole surface of the strip uniformly to obtain a uniformly stained strip. If the edges sho
34、w wear (surface elliptical)they will likely show more corrosion than the center. The use of a vise will facilitate uniform polishing.10. Procedure10.1 Fasten the 150-mm length of soft copper wire through the hole provided near one end of the strip, taking care not to touchthe strip with the fingers
35、after polishing.10.2 Place the strip in the flask and add 200 mL of the sample. The specimen must not contain separated water. Filter througha dry filter paper, if necessary, to remove water.10.3 Connect the flask to the vertical reflux condenser by means of a properly bored cork or glass stopper. I
36、t is absolutelynecessary that a cork or glass, not rubber, stopper be used, in order to avoid contamination of the specimen by sulfur from rubberstoppers. The copper wire may be allowed to extend into the condenser tube for convenience in removing the strip. Completelyimmerse the strip.10.4 Place th
37、e flask in the gently boiling water bath, and immerse the flask to the liquid line of the specimen within the flask.10.5 Remove the copper strip 30 min from the time the flask was immersed in the bath. Do not touch the copper strip, butremove it by the wire that has been provided. Do not allow the s
38、trip to come in contact with separated water during any part ofthe test, since water causes bad local staining of the copper. If it is desired to preserve the strip for future reference, dip itimmediately into white shellac or lacquer.11. Interpretation of Results11.1 Compare the exposed strip with
39、the ASTM Copper Strip Corrosion Standards described in 7.5 and as summarized in Table1. Hold the test strip and the Standard in such a manner that light reflected from them at an angle of approximately 45 will beobserved.11.1.1 When a strip is in the obvious transition state between that indicated b
40、y any two adjacent standard strips, rate the sampleat the more tarnished classification. Should a strip appear to have a darker orange color than Standard Strip 1b, consider theobserved strip as still belonging in Classification 1; however, if any evidence of red color is observed, the observed stri
41、p belongsin Classification 2.12. Report12.1 Report the corrosiveness of the copper strip in accordance with one of the classifications of the ASTM Copper StripCorrosion Standards and as summarized in Table 1. A rating of 1a or 1b is considered a “Pass;” all others shall be consideredfailures.13. Pre
42、cision and Bias13.1 In the case of pass/fail data, no generally accepted method for determining precision and bias is currently available.14. Quality Guidelines14.1Laboratories shall have a quality control system in place.14.1.1Confirm the performance of the test method by analyzing a quality contro
43、l sample following the guidelines of standardstatistical quality control practices.TABLE 1 Copper Strip ClassificationsClassification Designation DescriptionAFreshly polished strip .B1 slight tarnish a. Light orange, almost the same as freshly polished strip. b. Dark orange2 moderate tarnish a. Clar
44、et red. b. Lavender. c. Multicolored with lavender blue or silver, or both, overlaid onclaret red. d. Silvery. e. Brassy or gold3 dark tarnish a. Magenta overcast on brassy strip. b. Multicolored with red and green snowing (peacock), but no gray4 corrosion a. Transparent black, dark gray or brown wi
45、th peacock green barelyshowing. b. Graphite or lusterless black. c. Glossy or jet blackAThe ASTM Copper Strip Corrosion Standard is a colored reproduction of strips characteristic of these descriptions.BThe freshly polished strip is included in the series only as an indication of the appearance of a
46、 properly polished strip before a test run. It is not possible to duplicatethis appearance after a test even with a completely noncorrosive sample.D849 11314.1.2A quality control sample is a stable material isolated from the production process and representative of the sample beinganalyzed.14.1.3Whe
47、n QA/QC protocols are already established in the testing facility, these protocols are acceptable when they confirmthe validity of test results.14.1.4When there are no QA/QC protocols established in the testing facility, use the guidelines described in Guide D6809 orsimilar statistical quality contr
48、ol practices.14.1 In the case of pass/fail data, no generally accepted method for determining that this test is under statistical control iscurrently available.15. Keywords15.1 copper corrosion testSUMMARY OF CHANGESCommittee D16 has identified the location of selected changes to this standard since
49、 the last issue (D849 - 059)that may impact the use of this standard. (Approved DecemberFebruary 1, 2009.) 2011.)(1) Added Section ) Revised Section 14on QA/QC. .ASTM International takes no position respecting the validity 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 to revision at any time by the responsible tech
