1、Designation: F1137 111Standard Specification forPhosphate/Oil Corrosion Protective Coatings for Fasteners1This standard is issued under the fixed designation F1137; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last r
2、evision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTE1.1 was editorially corrected in February 2012.1. Scope*1.1 This specification covers the basic requirements for fourgrades of corr
3、osion protection for fasteners. Grade A consistsof a zinc phosphate coating with no additional sealer (dry),Grade B consists of a zinc phosphate coating with a dry organicsealer, Grade C, and Grade D consist of a zinc phosphatecoating with supplemental protective oil type compound.1.2 This specifica
4、tion is intended primarily for fastenerssuch as nuts, clips, washers, and other ferrous threaded andnon-threaded fasteners that require corrosion protection.1.3 These coatings may or may not have a decorative finish.2. Referenced Documents2.1 ASTM Standards:2B117 Practice for Operating Salt Spray (F
5、og) ApparatusF1470 Practice for Fastener Sampling for Specified Me-chanical Properties and Performance Inspection3. Classification3.1 The zinc phosphate treatment and subsequent protectivecoatings are classified into four grades according to therequirements shown in Table 1.4. Ordering Information4.
6、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 purchaser an
7、d the producer, the color of the protectivecoating shall be as-coated gray for Grades A, B, C, and D.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 surfac
8、es on 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 n
9、ot apply.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)me
10、ets all specified mechanical properties. All undersize/oversize must be within permissible limits as agreed uponbetween the supplier and the purchaser.5.4 Dry-to-TouchGrade C shall be evenly coated anddry-to-touch such that when held with filter paper or equivalentand applying hand pressure for 5 to
11、 10 s, there shall be novisible staining of the filter paper when viewed without use ofsupplementary magnification. For referee purposes, this testshall be performed using a force of 10 N as measured with aload-indicating gage.1This specification is under the jurisdiction of ASTM Committee F16 onFas
12、teners and is the direct responsibility of Subcommittee F16.03 on Coatings onFasteners.Current edition approved May 1, 2011. Published May 2011. Originallyapproved in 1988. Last previous edition approved in 2006 as F1137 00(2006).DOI: 10.1520/F1137-11E01.2For referenced ASTM standards, visit the AST
13、M website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Classification and Performance Requirements ofProtective CoatingsGrade No. ZincPhosphate,g/m2Suppl
14、ementalCoatingCoatingThickness, mSalt Spray,hGrade A 11, min none see 5.3 72AGrade B 11, min sealer see 5.3 72Grade C 11, min protective oil-typecompoundsee 5.3 24Grade D 11, min protective oil-typecompoundsee 5.3 72AWhen testing Grade A finished parts, a protective oil coating shall be addedbefore
15、salt spray testing.1*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. Sampling6.1 The purchaser may request samples in accordance withPractice F1470.7. Test Methods7.1
16、 The corrosion resistance shall be determined in accor-dance with Practice B117.7.2 The coating thickness may be determined by micro-scopic examination of the cross-section taken perpendicular tothe significant surface or by determining the coating mass(g/m2) by a weigh-strip-weigh method and then c
17、onverting toa coating thickness (see Note 1). Coating thickness, for refereepurposes, shall be measured by microscopic examination.NOTE 1The weigh-strip-weigh method involves weighing the testspecimen before and after stripping the deposit with a reagent which doesnot attack the base metal.The formu
18、la 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/m3.8. Inspection8.1 Samples shall be taken in accordance with PracticeF1470.8.2 Referee InspectionThe
19、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 screwwith a 2A or 6g cl
20、ass 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 reported tothe manufa
21、cturer as soon as practical after receipt of theproduct by the purchaser.10. Keywords10.1 coating; corrosion; fasteners; protection; phosphate;resistance; rustSUMMARY OF CHANGESCommittee F16 has identified the location of selected changes to this standard since the last issue(F113700(2006) that may
22、impact the use of this standard.(1) References to Grades I, II and III are removed.(2) The designations to 0A, 0B, 0C, 0D are revised to A, B Cand D.(3) The note” 9Fasteners manufactured from phosphated rawmaterial shall be dephosphated before heat treatment.9 wasremoved.ASTM International takes no
23、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
24、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
25、 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
26、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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).F1137 1112
