1、Designation: D 4627 92 (Reapproved 2007)An American National StandardStandard Test Method forIron Chip Corrosion for WaterDilutable MetalworkingFluids1This standard is issued under the fixed designation D 4627; the number immediately following the designation indicates the year oforiginal adoption o
2、r, in the case of revision, 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.1. Scope1.1 This test method covers evaluation of the ferrous cor-rosion control characte
3、ristics of waterdilutable metalworkingfluids.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility
4、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.2. Summary of Test Method2.1 Cast iron chips are placed in a petri dish containing afilter paper and diluted metalworking fluid. The dish is cove
5、redand allowed to stand overnight. The amount of rust stain on thefilter paper is an indication of the corrosion control provided bythe fluid.3. Significance and Use3.1 The results obtained by this test are a useful guideline indetermining the ability of water diluted metalworking fluids toprevent o
6、r minimize rust under specific conditions. There isusually a relationship between the results of this test and asimilar ability of the subject coolant to prevent rust on nestedparts or in drilled holes containing chips, etc. It must beunderstood, however, that conditions, metal types, etc. found inp
7、ractice will not correlate quantitatively with these controlledlaboratory conditions. The procedure may not be able todifferentiate between two products with poor rust control dueto the wide spacing between test dilutions.4. Apparatus4.1 Disposable Petri Dishes, 35 by 10 mm plastic, with lidsNo. 8-7
8、57-100A.4.2 Glass-Fiber Filter Paper, Whatman No. 934-AH,3.2-cm diameter.4.3 Glass Stirring Rod.4.4 Spatula.4.5 Pipettes, 5 mL.4.6 Glass Bottle, 4-oz. with cap.4.7 Balance, accurate to 1 mg.4.8 Graduated Cylinder,50mL.4.9 Volumetric Flask,1L.4.10 Forceps.4.11 U.S. Standard Sieve, 18-mesh (1.0-mm sie
9、ve open-ings), stainless steel.5. Reagents and Materials5.1 Gray Cast Iron Drilling Chips.2NOTE 1The chips are made from Class 30 gray cast iron, as cast. Thestructure is mostly pearlite with small amounts of ferrite and type Agraphite. Brinell hardness is 179217. The chips are made using a clean,oi
10、l free jobbers length high speed drill of 29/64 in. diameter with 118plain point, 29 helix and 1215 clearance. Rotational speed should be500 rpm at a feed rate of 0.015 in./rev. Hand feeding is not permissible.The chips are sieved on 5 and 18-mesh sieves and those retained on the18-mesh sieve are im
11、mediately stored in airtight pint glass bottles. Eachdrilling is given a batch number. The bottle labels bear this batch numberand the date of filling.5.2 Synthetic Hard Water, 20,000 mg/L stock solutionprepared by dissolving 29.4 g reagent grade (ACS standard)CaCl22H2O in 1 L of freshly boiled dist
12、illed water.Amoderatehardness water is necessary in this test (100 ppm as CaCO3,71mg/L as chloride), and can be prepared at the time of the testby diluting the stock hard water 0.5 % in distilled water.5.3 Metalworking Fluid of Interest.6. Preparation of Diluted Metalworking Fluid6.1 Prepare 50 mL o
13、f fluid at each desired concentration byweight % in the 100 mg/L hardness water described above. Thewater must be at room temperature as described in 7.1. Alwaysadd the metalworking fluid concentrates into the water.6.2 The dilutions tested will be in weight % as follows:0.5, 1, 1.5, 2, 2.5, 3, 4, 5
14、, 7 and 10 %1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.L0.01 on Metal Removal Fluids and Lubricants.Current edition approved May 1, 2007. Published July 2007. Originally approvedin 1986. La
15、st previous edition approved in 2002 as D 462792 (2002).2The sole source of supply of the drilling chips known to the committee at thistime is Techsolve, Technical Center, 1111 Edison Drive, Cincinnati, OH 45216-2265. If you are aware of alternative suppliers, please provide this information toASTM
16、International Headquarters. Your comments will receive careful consider-ation at a meeting of the responsible technical committee,1which you may attend.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Each dilution must be separately
17、prepared. Stock emulsionssubsequently diluted must not be used.6.3 Cap the bottle and shake vigorously until dispersion iscomplete.7. Procedure7.1 Make the test in a room free from corrosive fumes, awayfrom direct sunlight, and a room temperature of 20C to 25C(68F to 77F).7.2 Sieve the cast iron chi
18、ps on the 18-mesh screen,rejecting the fines and any chips showing signs of rust.NOTE 2Do not allow the chips to come in contact with the skin.NOTE 3Store the chips in an airtight glass bottle.7.3 Using forceps, place the filter paper in the bottom half ofa clean, dry petri dish. Place the smooth si
19、de of the paperdown, and the rough side up to contact the chips.7.4 Measure 5.0 mL of diluted metalworking fluid into thedish.7.5 Weigh 4.0 6 0.1 g of cast iron chips and sprinkle intothe petri dish. Use the stirring rod to be certain all chips aresubmerged, all air bubbles released, and the chips a
20、re evenlydistributed.7.6 Cover the dish with its lid and allow to stand for 2024h.7.7 Drain the fluid from the dish. Invert the dish on its lidand tap to remove the chips.7.8 Rinse the filter paper with running tap water for about 5s to remove any discoloration due to the fluid.7.9 After rinsing, es
21、timate the percent of the filter paper areawhich was stained by rusting chips. This is done by visualexamination (without magnification) of the side of the paperthat was in contact with the chips.7.10 The “breakpoint” is defined as the weakest concentra-tion tested that left no rust stain on the fil
22、ter paper. This valuemay be used to compare the rust inhibiting properties ofvarious fluids.8. Precision and Bias8.1 PrecisionThe precision of this test method as deter-mined by the statistical examination of interlaboratory testresults is as follows:8.2 RepeatabilityThe difference between two succe
23、ssivetest results obtained by the same operator with the sameapparatus under constant operating conditions on identical testmaterial would, in the long run, in the normal and correctoperation of the test method exceed the following values onlyin one case in twenty.Repeatability 5 0.64 for sample Nos
24、. 1, 3, 4, and 5 (1)8.3 ReproducibilityThe difference between two single andindependent results obtained by different operators working indifferent laboratories on identical test material would, in thelong run, exceed the following values only in one case intwenty.Reproducibility 5 1.85 for sample N
25、os. 1, 3, 4, and 5 (2)8.4 BiasThe procedure in this test method for iron chipcorrosion test for waterdilutable metalworking fluids has nobias because the Corrosion Values can be defined only in termsof a test method.9. Keywords9.1 corrosion test; ferrous corrosion test; iron chip corrosiontest; meta
26、lworking fluid corrosion test; water dilutable fluidscorrosion testTABLE 1 Replicate ResultsREPLICATE RESULTS_ Data_ Program_ Form APage_of_Date_Instructions:X1is 1st resultX2is 2nd resultSum total labsm=10Sum total samplesn=6SAMPLE NUMBER (j)12345678910LABORATORYNUMBER(i)1X1X25%5%10 %10 %2%2.5 %2%2
27、.5 %3%4%10 %10 %2X1X210 %10 %7%7%3%3%3%4%4%4%10 %10 %3X1X22.5 %.10 %.3%.3%.5%.10 %.4X1X23%3%7%7%2.5 %2.5 %3%3%3%4%10 %10 %5X1X22%2.5 %5%10 %2.5 %2.5 %2.5 %2.5 %4%4%10 %10 %6X1X22.5 %3%10 %10 %3%3%2.5 %3%5%5%10 %10 %7X1X22%2.5 %10 %10 %3%2.5 %2%2%3%3%10 %10 %8X1X22.5 %3%5%7%3%2.5 %3%4%2.5 %3%7%10 %9X
28、1X22.5 %2%5%7%2.5 %2.5 %2.5 %2.5 %4%4%10 %10 %10X1X22%2.5 %10 %10 %3%3%3%3%3%3%10 %10 %D 4627 92 (2007)2ASTM 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
29、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 technical committee and must be reviewed every five years andif not revised, either reapprove
30、d or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel
31、 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 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).D 4627 92 (2007)3
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