1、Designation: F 1137 00 (Reapproved 2006)Standard Specification forPhosphate/Oil and Phosphate/Organic Corrosion ProtectiveCoatings for Fasteners1This standard is issued under the fixed designation F 1137; the number immediately following the designation indicates the year oforiginal adoption or, in
2、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 specification covers the basic requirements forseven grades of corrosion prote
3、ction for fasteners. Grade 0Aconsists of a zinc phosphate coating with no additional sealer(dry), Grade 0B consists of a zinc phosphate coating with a dryorganic sealer, Grade 0C, Grade 0D, and Grade I consist of azinc phosphate coating with supplemental protective oil typecompound, and Grades II an
4、d III consist of a zinc phosphatewith a supplemental zinc-rich epoxy resin coating (Grade IIincludes a clear organic topcoat).1.2 This specification is intended primarily for fastenerssuch as nuts, clips, washers, and other ferrous threaded andnon-threaded fasteners that require corrosion protection
5、.1.3 These coatings may or may not have a decorative finish.2. Referenced Documents2.1 ASTM Standards:2B117 Practice for Operating Salt Spray (Fog) ApparatusD 2247 Practice for Testing Water Resistance of Coatings in100 % Relative HumidityD 3359 Test Methods for Measuring Adhesion by Tape TestF 1470
6、 Guide for Fastener Sampling for Specified Mechani-cal Properties and Performance Inspection3. Classification3.1 The zinc phosphate treatment and subsequent protectivecoatings are classified into seven grades according to therequirements shown in Table 1. Phosphate bath concentrations,temperatures a
7、nd immersion times recommended by thechemical manufacture should be followed.4. Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity of parts,4.1.2 Grade required (see Table 1), and4.1.3 Any additions agreed upon between the purch
8、aser andthe supplier.5. Requirements5.1 AppearanceUnless otherwise agreed upon betweenthe purchaser and the producer, the color of the protectivecoating shall be as-coated gray for Grades 0A, 0B, 0C, and 0D,black for Grade I, and metallic gray for Grades II and III. Inaddition, Grades II and III sha
9、ll be free from tears, sags, andexcess coating that may affect appearance or performance, orboth.5.2 AdhesionThe coating for Grades II and III shall showno evidence of blistering nor other appearance changes afterexposure to humidity testing for 96-h minimum. It shall showno more than 3.0-mm peal-ba
10、ck from intersection of linesscribed and tape tested immediately after a 10-min recoveryperiod following exposure, and no other peeling in area underthe tape.5.3 Corrosion ResistanceThese coatings shall be capableof withstanding neutral salt spray for the minimum h specifiedin Table 1 with no base m
11、etal corrosion on significant surfaces.Significant surfaces on threaded fasteners are defined as the1This specification is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommittee F16.03 on Coatings onFasteners.Current edition approved June 1, 2006. P
12、ublished June 2006. Originallyapproved in 1988. Last previous edition approved in 2000 as F 1137 00.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Do
13、cument Summary page onthe ASTM website.TABLE 1 Classification and Performance Requirements ofProtective CoatingsGrade No. ZincPhosphate,g/m2SupplementalCoatingCoatingThickness,mSalt Spray,hGrade 0A 11, min none see 5.5 72AGrade 0B 11, min sealer see 5.5 72Grade 0C 11, min protective oil-typecompound
14、see 5.5 24Grade 0D 11, min protective oil-typecompoundsee 5.5 72Grade I 2632 protective oil-typecompoundsee 5.5 168Grade II 1316 zinc-richBresinflake1525 240Grade III 1316 zinc-rich resinpowderC1020 400AWhen testing Grade 0A finished parts, a protective oil coating shall be addedbefore salt spray te
15、sting.BZinc-rich resin to contain 60 % minimum metallic zinc flake by volume with 14to 16 % aluminum.CZinc-rich resin to contain 80 % minimum metallic zinc powder by volume withtrace aluminum.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United
16、States.exposed surfaces when the fasteners are installed in a normalmanner (bolt head, nut head, face, etc.). On other surfaceswhere control of the coating cannot be obtained under normalprocessing such as holes, recesses, threads, etc., the aboverequirements do not apply.5.4 Coating FlexibilityThes
17、e coatings shall withstand thenormal flexing encountered by spring clips, or swaged andflaired fasteners, without evidence of flaking or loss of adhe-sion to base metal. They shall also withstand normal handlingand storage conditions.5.5 Thread FitThe maximum thickness of coating whichmay be applied
18、 to threads on threaded products is limited bythe basic thread size (see 8.2). Threads may be producedundersize/oversize (before coating) to accommodate the coat-ing thickness, providing the finished product (after coating)meets all specified mechanical properties. All undersize/oversize must be wit
19、hin permissible limits as agreed uponbetween the supplier and the purchaser.5.6 Dry-to-TouchGrade 0C shall be evenly coated anddry-to-touch such that when held with filter paper or equivalentand applying hand pressure for 5 to 10 s, there shall be novisible staining of the filter paper when viewed w
20、ithout use ofsupplementary magnification. For referee purposes, this testshall be performed using a force of 10 N as measured with aload-indicating gage.6. Sampling6.1 The purchaser may request samples in accordance withGuide F 1470.7. Test Methods7.1 The humidity test and adhesion test shall be con
21、ductedin accordance with Practice D 2247 and Test Methods D 3359,respectively, for Grades II and III.7.2 The corrosion resistance shall be determined in accor-dance with Practice B117.7.3 The coating thickness may be determined by micro-scopic examination of the cross-section taken perpendicular tot
22、he significant surface or by determining the coating mass(g/m2) by a weigh-strip-weigh method and then converting toa coating thickness (see note). Coating thickness, for refereepurposes, shall be measured by microscopic examination.NOTE 1The weigh-strip-weigh method involves weighing the testspecim
23、en before and after stripping the deposit with a reagent which doesnot attack the base metal.The formula used for measuring the thickness of a deposit bythe weigh-strip-weigh method is:T 5WA 3 D3 103where:T = thickness, m,W = mass of deposit, g,A = area of deposit, m2, andD = density of coating, kg/
24、m3.7.4 The presence of clear topcoat for Grade II may bedetermined by the sulfamic acid drop test: One to two drops of1 % sulfamic acid shall be dropped on the surface. In theabsence of topcoat, the surface will turn black.8. Inspection8.1 Samples shall be taken in accordance with GuideF 1470.8.2 Re
25、feree InspectionThe following referee thread in-spection procedure may be utilized if the specified “go” gagebinds on the screw.8.2.1 Bolt or ScrewAssemble a phosphate-plated test nutwith a 2B or 6H class thread down the full length of the thread.8.2.2 NutAssemble a phosphate-plated test bolt or scr
26、ewwith a 2A or 6g class thread for a minimum of one diameterthrough the nut.8.2.3 The test nut or screw/bolt must run freely for the totallength without binding.9. Rejection and Rehearing9.1 Unless otherwise specified, any rejection based on testsspecified herein and made by the purchaser shall be r
27、eported tothe manufacturer as soon as practical after receipt of theproduct by the purchaser.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 determinati
28、on 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 reapproved or withdr
29、awn. 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 that your
30、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).F 1137 00 (2006)2
