1、Designation:F 1135 99Standard Specification forCadmium or Zinc Chromate Organic Corrosion ProtectiveCoating for Fasteners1This standard is issued under the fixed designation F 1135;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、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 performance require-ments for an electrolytic or mechanical coating of cadmium
3、 orzinc followed by a chromate and baked organic coating forferrous and nonferrous fasteners.1.2 There are eight grades available under this standard;four for zinc and four for cadmium.1.3 This standard is intended primarily for fasteners such asnuts,bolts,and screws that require corrosion protectio
4、n.2.Referenced Documents2.1 ASTM Standards:B 117 Test Method of Salt Spray(Fog)Testing2B 244 Test Method for Measurement of Thickness of An-odic Coatings on Aluminum and of Other NonconductiveCoatings on Nonmagnetic Basis Metals with Eddy-CurrentInstruments3B 487 Test Method for Measurement of Metal
5、 and OxideCoating Thickness by Microscopical Examination of aCross Section3B 499 Test Method for Measurement of Coating Thicknessby the Magnetic Method:Nonmagnetic Coatings on Mag-netic Basis Metals3B 633 Specification for Electrodeposited Coatings of Zincon Iron and Steel3B 695 Specification for Co
6、atings of Zinc MechanicallyDeposited on Iron and Steel3B 696 Specification for Coatings of Cadmium MechanicallyDeposited3D 3359 Test Method for Measuring Adhesion by Tape Test4F 871M Specification for Electrodeposited Coatings onThreaded Components Metric5F 1470 Guide for Fastener Sampling for Speci
7、fied Mechani-cal Properties and Performance Inspection5F 1940 Test Method for Process Control Verification toPrevent Hydrogen Embrittlement in Plated or CoatedFasteners53.Classification3.1 These coatings are classified into eight grades accordingto the requirements shown in Table 1.4.Ordering Inform
8、ation4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity of parts.4.1.2 Grade required(see 3.1)and color code(see 5.4).4.1.3 Any conditions or additions agreed upon by thepurchaser and the supplier.5.Requirements5.1 Parts supplied to this specificat
9、ion shall have a chromatecoating plus an organic coating applied to maintain adequatesalt spray protection.The coatings shall not chip,leach color,or suffer color loss.5.2 Substrate shall be either ferrous or nonferrous metalfasteners.5.3 The finish shall be a cured organic coating.5.4 The appearanc
10、e shall be either CLEAR(Color code A)or BLACK(Color code B).Other colors may be specified bythe purchaser.5.5 The gloss shall be described as medium.5.6 The film properties shall have sufficient hardnessthrough curing at time of delivery to withstand normal han-dling and shipping without marring.5.7
11、 Coating Thickness Measurement The thickness shallbe determined by the method described in 8.1 and meet therequirements of Table 1.5.8 Organic Coating Determination Any part with thecoating applied and properly cured shall exhibit no discolora-tion after soaking in a 5%trisodium phosphate solution f
12、or 5min at room temperature,water rinsed,towel dried,andsubjected to 1 to 2 drops of a 5%lead acetate solution on thesurface for 60 s.Those parts lacking both an organic andchromate coating will have a color change after about 5 s.5.9 AdhesionParts heated to 190C for 30 min shall notexhibit blisteri
13、ng,peeling,flaking,or plating which can be1This specification is under the jurisdiction of ASTM Committee F-16 onFasteners and is the direct responsibility of Subcommittee F16.03 on Metal Coatingson Threaded Fasteners.Current edition approved Oct.10,1999.Published December 1999.Originallypublished a
14、s F 1135-88.Last previous edition F 1135-88(1993)e1.2Annual Book of ASTM Standards,Vol 03.02.3Annual Book of ASTM Standards,Vol 02.05.4Annual Book of ASTM Standards,Vol 06.01.5Annual Book of ASTM Standards,Vol 01.08.1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.
15、removed by filament tape in accordance with Test MethodD 3359.5.10 Salt Spray TestNo part shall exhibit white corrosionor red rust on significant surfaces(as agreed upon betweensupplier and producer prior to ordering)after exposure for theminimum number of salt spray h shown in Table 1.6.Process Met
16、hod6.1 It is not intended to limit the supplier as to the formulaor method of coating or surface treatment except as indicated:6.1.1 Cadmium and zinc processing shall be in accordancewith the applicable ASTM coating specification.Good prac-tices may be found in Specifications B 633 and B 695 for zinc,Specification B 696 for cadmium and in Specification F 871Mfor both zinc and cadmium.6.2 The chemical activator(surface conditioner)used shallnot cause hydrogen embrittlement of hardened steel faste
