1、Designation: F1137/F1137M 18Standard Specification forPhosphate/Oil Corrosion Protective Coatings for Fasteners1This standard is issued under the fixed designation F1137/F1137M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the y
2、ear of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers the basic requirements for sixgrades of corrosion protection for fasteners. Grade A
3、consistsof a heavy zinc phosphate coating with no additional sealer(dry), Grade B consists of a heavy zinc phosphate coating witha dry organic sealer, Grade C consists of a heavy zincphosphate coating with supplemental dry-to-touch oil typecompound, Grade D consists of a heavy zinc phosphate coating
4、with supplemental protective oil type compound, Grade Econsists of a grain-refined microcrystalline zinc phosphate withsupplemental oil type compound, and Grade F consists of amanganese phosphate coating with supplemental oil typecompound.1.2 This specification is intended primarily for fastenerssuc
5、h as nuts, clips, washers, and other ferrous threaded andnon-threaded fasteners that require corrosion protection andlubrication.1.3 These coatings may or may not have a decorative finish.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The value
6、s stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.5 This international standard was developed in accor-dance with internationally recognized princi
7、ples on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2B117 Practice for Operating Salt
8、Spray (Fog) ApparatusF1470 Practice for Fastener Sampling for Specified Me-chanical Properties and Performance Inspection3. Classification3.1 The phosphate treatments and subsequent protectivecoatings are classified into six grades according to the require-ments shown in Table 1.4. Ordering Informat
9、ion4.1 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 purchaser andthe supplier.5. Requirements5.1 AppearanceUnless otherwise agreed upon betweenthe purchas
10、er and the producer, the color of the protectivecoating shall be as-coated gray for all grades.5.2 Corrosion ResistanceThese coatings shall be capableof withstanding neutral salt spray for the minimum h specifiedin Table 1 with no base metal corrosion on significant surfaces.Significant surfaces on
11、threaded fasteners are defined as theexposed 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 app
12、ly.5.3 Thread FitThe maximum thickness of coating whichmay be applied 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 al
13、l specified mechanical properties. All undersize/oversize must be within permissible limits as agreed uponbetween the supplier and the purchaser.5.4 Dry-to-TouchGrades B and C shall be evenly coatedand dry-to-touch such that when held with filter paper orequivalent and applying hand pressure for 5 t
14、o 10 s, there shallbe no visible staining of the filter paper when viewed withoutuse of supplementary magnification. For referee purposes, this1This specification is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommittee F16.03 on Coatings onFastene
15、rs.Current edition approved June 1, 2018. Published August 2018. Originallyapproved in 1988. Last previous edition approved in 2011 as F1137 111. DOI:10.1520/F1137-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual
16、Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*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 StatesThis internation
17、al standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee
18、.1test shall be performed using a force of 10 N as measured witha load-indicating gage.6. Sampling6.1 The purchaser may request samples in accordance withPractice F1470.7. Test Methods7.1 The corrosion resistance shall be determined in accor-dance with Practice B117.7.2 The coating thickness may be
19、determined by micro-scopic examination of the cross-section taken perpendicular tothe significant surface. Coating thickness, for referee purposes,shall be measured by this method.The formula used for measuring the thickness of a deposit bythe weigh-strip-weigh method is:Coating weight in mg/ft2gm2!
20、5IntialWeight in mgg! 2 FinalWeight in mgg!Total Area in ft2m2!7.3 The coating weight of the phosphate deposit shall bedetermined using the weigh-strip-weigh method (see Note 1).The formula used for measuring weight of a deposit by theweigh-strip-weigh method is:NOTE 1The weigh-strip-weigh method in
21、volves weighing the testspecimen before and after stripping the deposit with a reagent which doesnot attack the base metal.8. Inspection8.1 Samples shall be taken in accordance with PracticeF1470.8.2 Referee InspectionThe following referee thread in-spection procedure may be utilized if the specifie
22、d “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 screwwith a 2A or 6g class thread for a minimum of one diameterthrough the nut.8.2.3 The test nut or
23、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 reported tothe manufacturer as soon as practical after receipt of theproduct by the purchaser.10. K
24、eywords10.1 coating; corrosion ; fasteners; protection; phosphate;resistance; rustTABLE 1 Classification and Performance Requirements of Protective CoatingsGrade PhosphateTreatmentCoating Weight SupplementalCoatingCoating Thickness,mSalt Spray,hmg/ft2g/m2Grade A Heavy Zinc Phosphate 1000, min 11, mi
25、n none see 5.3 72AGrade B Heavy Zinc Phosphate 1000, min 11, min sealer see 5.3 72Grade C Heavy Zinc Phosphate 1000, min 11, min protective oil-typecompound(dry-to-touch)see 5.3 24Grade D Heavy Zinc Phosphate 1000, min 11, min protective oil-typecompoundsee 5.3 72Grade E MicrocrystallineZinc Phospha
26、teB185 min650 max2min7maxprotective oil-typecompoundsee 5.3 8Grade F Manganese Phosphate 370 min1765 max4min19maxprotective oil-typecompoundsee 5.3 24AWhen testing Grade A finished parts, a protective oil coating shall be added before salt spray testing.BMicrocrystalline zinc phosphate crystals shal
27、l be refined such that a mean crystal size of 4-8 m is obtained, with a crystal size of 10 m.F1137/F1137M 182SUMMARY OF CHANGESCommittee F16 has identified the location of selected changes to this standard since the last issue (F1137111)that may impact the use of this standard.(1) Added inch series
28、references throughout the specificationincluding Table 1.(2) Added Microcrystalline Zinc Phosphate (Grade E) andManganese Phosphate (Grade F) to Table 1 and throughout thespecification.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any i
29、tem 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 technical co
30、mmittee 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 ASTM International Headquarters. Your comments will receive careful consideration at a
31、 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 address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Dri
32、ve, 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 183
