1、Designation: C 777 04 (Reapproved 2009)Standard Test Method forSulfide Resistance of Ceramic Decorations on Glass1This standard is issued under the fixed designation C 777; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the qualitative determination ofthe sulfide resistance of ceramic decorations on glass to as
3、surethe necessary durability of the decoration.1.2 This test method provides an indication of performancewhen and if the decorations are exposed to sulfide attack.1.3 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.4 This stan
4、dard 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-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.5 This test method generat
5、es hydrogen sulfide gas whichis highly poisonous.2. Referenced Documents2.1 ASTM Standards:2C 224 Practice for Sampling Glass Containers3. Summary of Test Method3.1 One half of the specimens are immersed in a volume4 % acetic acid solution that contains 1 mL of saturated sodiumsulfide solution per e
6、ach 100 mL of the acetic acid solution ina suitable covered container at room temperature. The degreeof attack is determined by visual observation and physicaltesting of the specimen exposed to a hydrogen sulfide atmo-sphere.4. Apparatus4.1 Suitable Covered Container.4.2 Stirrer.4.3 Hot Plate.4.4 Pi
7、pet.4.5 Fume Hood, or other means of adequately exhaustingH2S produced during the test.5. Reagents5.1 Sodium Sulfide (Na2S9H2O), reagent grade.5.2 Acetic Acid (CH3COOH, min 99.8 %), reagent grade.6. Test Specimen6.1 The decorated ware should be representative of the lot,or run, and should be taken i
8、n accordance with the principlesstated in Practice C 224.6.2 Standard reference ware of known resistance must berun with each test.7. Preparation of Test Solution7.1 Make a 4 % volume acetic acid solution by adding toeach 96 mL of distilled water 4 mL of acetic acid.7.2 Dissolve an excess amount of
9、sodium sulfide in warm(35 to 40C) distilled water. Make sure there is undissolvedsodium sulfide left over. Cool to room temperature.7.3 Stir into each 100 mL of the 4 % acetic acid solution 1mL of saturated, clear, sodium sulfide solution for 2 or 3 min.A milk of sulfur will precipitate.8. Procedure
10、8.1 Place the test specimens and the reference standard ofknown resistance into the test solution prepared according to7.3 at room temperature so that only half of the decoration isimmersed. Stir and cover.8.2 Remove specimens from solution after 15 min and allowto air dry.8.3 Note the degree of att
11、ack after 15 min by visualobservation and grade.8.4 Retain a duplicate piece of ware of each decorationunder test without exposure as an aid in judging the degree ofattack on the specimens under test.9. Interpretation of Results9.1 Visual Inspection:9.1.1 Grade the decoration on the test specimen an
12、d refer-ence standard in accordance with one of the following visualtest grades:9.1.2 Visual Evaluation:1This test method is under the jurisdiction of ASTM Committee C14 on Glassand Glass Products , and was written by Subcommittee C14.10 on Glass Decorationin cooperation with the Society of Glass De
13、corators Committee A-20.Current edition approved May 1, 2009. Published September 2009. Originallyapproved in 1974. Last previous edition approved in 2004 as C 777 04.2For 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Grade V1No attack apparent.Grade V2Appearance of iridescence or visible stain o
15、n theexposed surface when viewed at a 45 angle but not apparentat angles less than 30.Grade V3A definite stain which does not blur reflectedimages and is visible at angles less than 30.Grade V4Definite stain with a gross color change orstrongly iridescent surface visible at angles less than 30 andwh
16、ich may blur reflected images.Grade V5Surface dull or matte and grossly discolored.9.2 Physical Testing of Stain:9.2.1 If a stain exists, grade the decoration on the testspecimen and reference standard in accordance with one of thefollowing physical test grades:9.2.2 Physical Testing of Stain:Grade
17、P1Stain is easily removed by gently rubbing thehydrogen sulfide atmosphere exposed decoration with a drypaper towel.Grade P2Stain is not completely removed by gentlyrubbing the hydrogen sulfide atmosphere exposed decorationwith a dry paper towel, but can be removed by vigorousrubbing.Grade P3Stain c
18、annot be completely removed by vigor-ous rubbing with a dry paper towel.10. Report10.1 Report the following information:10.1.1 Identification of the ware, the decorating materialused, and the firing cycle.10.1.2 Grading of the specimen and the reference standard.10.1.3 Date of test and name of opera
19、tor conducting test.11. Precision and Bias11.1 No justifiable statement can be made regarding theprecision and bias of this test method since the degree of attackis determined with a subjective grading system.12. Keywords12.1 ceramic decorations; glass; sulfide resistanceASTM International takes no
20、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 responsi
21、bility.This standard is subject to 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
22、 ASTM International Headquarters. 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 addr
23、ess shown below.This standard is 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).C 777 04 (2009)2
