Designation: A153/A153M − 16a American Association State Highway and Transportation Officials Standard AASHTO No. M232 Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware 1 This standard is issued under the fixed designation A153/A153M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revis revision. ion. A number in parentheses parentheses indicates the year of last reapproval. reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the U.S. Department of Defense. 1. Sco Scope* pe* 2. Referenc Referenced ed Documents 1.1 Thi Thiss spe specific cificatio ation n cov covers ers zin zincc coa coating tingss app applied lied by the hotho t-di dip p pr proc oces esss on ir iron on an and d ste steel el ha hard rdwa ware re.. Th Thee ho hott-di dip p galvanizing process consists of parts being immersed in molten zinc for a suf suffficie icient nt time to allo allow w a meta metallur llurgic gical al rea reactio ction n betw be tween een ir iron on fr from om th thee ste steel el su surf rface ace an and d th thee mo molte lten n zi zinc nc,, resulting in the formation of Zn/Fe alloy layers bonding the coating to the steel surface. 1.2 This specification specification is intended to be applicable applicable to hardware items that are centrifuged or otherwise handled to remove excess galvanizing bath metal (free zinc). Coating thickness grade requirements reflect this. 1.3 Fas Fasten teners ers that mus mustt com comply ply with the Fastener Fastener Qua Quality lity Act require specific statistical sampling during the inspection of the fastener lots. Requirements for the sampling of these fasteners can be found in F2329/F2329M F2329/F2329M.. 1.4 This sp 1.4 speci ecific ficati ation on is ap appl plica icabl blee to or orde ders rs in ei eith ther er inch in ch-p -pou ound nd un units its (a (ass A1 A153 53)) or in SI un unit itss (a (ass A1 A153 53M) M).. Inch In ch-p -pou ound nd un units its an and d SI un units its ar aree no nott ne nece cess ssar arily ily ex exact act equiva equ ivalen lents. ts. Wi Withi thin n the tex textt of thi thiss spe specifi cificati cation on and whe where re appropriate, SI units are shown in brackets. Each system shall be used independently of the other without combining values in any an y wa way y. In th thee ca case se of orders orders in SI un units its,, all testin testing g an and d inspection shall be done using the metric equivalent of the test or inspection method method as appro appropriate. priate. In the case of orders in SI units, such shall be stated to the galvanizer when the order is placed. 1.5 This standar standard d doe doess not purport purport to add addre ress ss all of the safet sa fetyy co conc ncer erns ns,, if an anyy, as asso socia ciate ted d wi with th its us use. e. It is th thee responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2.1 ASTM Standards:2 A90/A90M Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings A143/A143M Practice for Safeguarding Against Embrittlement of Hot-Dip Galvanized Structural Steel Products and Procedure Proced ure for Detectin Detecting g Embri Embrittlement ttlement A780 Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings A902 Terminology Relating to Metallic Coated Steel Products B6 Specification for Zinc B487 Test Meth Method od for Mea Measur suremen ementt of Met Metal al and Oxi Oxide de Coating Coat ing Thi Thickn ckness ess by Micr Microsc oscopi opical cal Exa Examin minatio ation n of Cross Sectio Section n B960 Spe Specific cificatio ation n for Pri Prime me Weste estern rn Gra Gradede-Recy Recycled cled (PWG-R) (PWGR) Zinc E376 Pr Pract actice ice fo forr Mea Measur surin ing g Coa Coatin ting g Th Thick ickne ness ss by Magnetic-Field or Eddy-Current (Electromagnetic) Testing Methods F1470 Pra Practic cticee for Fas Fasten tener er Sam Sampli pling ng for Spe Specifie cified d Mechanicall Prope chanica Properties rties and Perfo Performance rmance Inspection F1789 Terminology for F16 Mechanical Fasteners F2329/F2329M Spe Specific cificatio ation n for Zin Zincc Coa Coating ting,, Hot Hot-Di -Dip, p, Requirements for Application to Carbon and Alloy Steel Bolt Bolts, s, Scr Screws ews,, Wash ashers ers,, Nut Nuts, s, and Spe Special cial Thr Thread eaded ed Fasteners 3. Terminology 3.1 Definitions: 3.1.1 The following following terms and definitions definitions are specific specific to this specification. Termino Terminology logy A902 con contain tainss oth other er term termss and definitions relating to metallic-coated steel products. Terminology F1789 cont contain ainss oth other er ter terms ms and defi definit nition ionss rela relatin ting g to mechanical fasteners. 3.2 Definitions of Terms Specific to This Standard: 1 This specification specification is under the jurisd jurisdiction iction of ASTM Committee Committee A05 on MetallicMetall ic-Coa Coated ted Iron and Ste Steel el Pro Produc ducts ts and is the dire direct ct res respon ponsib sibili ility ty of Subcommittee A05.13 on Structural Shapes and Hardware Specifications. Current edition approved . Published November 2016. Originally approved in 1933. Last previous edition approved in 2016 as A153/A153M - 16. DOI: 10.1520/ For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on A0153_A0153M-16A. the ASTM website. 2 *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 Copyright ASTM International Provided by IHS Markit under license with ASTM No reproduction or networking permitted without license from IHS 1Licensee=SNC Lavalin Inc - Montreal - Main/5938179019, User=Ben ayed, rached Not for Resale, 11/23/2018 07:27:07 MST ` , , ` , ` , , ` , , ` ` , ` ` ` , ` , , ` ` , ` , , , ` , , , ` , , , , ` ` , ` , ` - A153/A153M − 16a thee av aver erag agee of th thee 3.2.1 a aver verage age coa coating ting thi thickn ckness ess,, n—th spec sp ecime imen n co coati ating ng th thick ickne ness ss va valu lues es fo forr the the sam sampl ples es in an inspection lot. 4. Mate Material rialss and Manufacture Manufacture 4.1 Steel or Iron—Ferrous articles to be hot-dip zinc coated shall conform to specifications designated by the purchaser. 3.2.2 bare spots, n—uncoated areas on the surface of the steel part that contain no measurable zinc coating. 4.2 Zinc—The zinc used for the coating shall conform to Specification B6 B6,, or Specification B960 B960,, or both, and shall be at least equal to the grade designated as “Prime Western.” 4.2. 4. 2.1 1 If a zi zinc nc alloy alloy is us used ed as th thee pr prim imar ary y fe feed ed for the galvanizing bath, then the base material used to make that alloy shall conform to Specification B6 or Specifi Specification cation B960 B960,, or both. 4.2. 4. 2.2 2 The mo molte lten n me meta tall in th thee wo work rkin ing g vo volu lume me of th thee galvanizing bath shall contain not less than an average value of 98.0 % zinc by weight [mass]. 3.2.3 dross inclusions, n—the iron/zinc intermetallics present in a ga ent galv lvan anize ized d co coat atin ing g in a fo form rm ot othe herr th than an th thee lay layer er growth of the coating. 3.2.4 individual measurement, n—the reading from a magnetic thickness gauge of a single coating spot thickness, or the microscopic reading of a coating thickness as seen in an optical microscope at one spot. 3.2.5 iins nspec pectio tion n lot lot,, n—th thee qu quant antity ity of ide identi ntical cal par parts ts clean cle aned ed,, flu fluxe xed d an and d ga galv lvan anize ized d to toge geth ther er at on onee tim timee in an appropriate appro priate container container that is being submitted submitted for accepta acceptance nce as a group. NOTE 1—The galvanizer may choose to add trace amounts of certain elements (for example, aluminum, nickel, bismuth, or tin) to the zinc bath to hel help p in the processi processing ng of cer certai tain n rea reacti ctive ve ste steels els or to enhance enhance the cosmetic appearance of the finished product. The elements can be added to the galvanizing bath as a master feed alloy, or they can be added to the bath by the galvanizer as individual feeds. 3.2.6 mall steel eel ar arti ticle cle th that at ha hass be been en malleab eable le cas castin ting, g, n—a st subjected to a prolonged anneal to decarburize or graphitize the part to remove as much of the carbon as possible or to convert the carbon to graphite, which permits plastic deformation in compression without rupture. 4.3 Minimum Coating Weight [Mass] or Minimum Coating Thickness—The minimum coating weight [mass] or the minimum coa coating ting thic thickne kness ss sha shall ll con confor form m to the req requir uireme ements nts prescribed in Table 1 for the material category and thickness of material in which the article belongs. 3.2.7 sample, n—a collection of individual units of product from a single inspection lot selected in accordance with Section ` , ` , ` ` , , , , ` , , , ` , , , ` , ` ` , , ` , ` ` ` , ` ` , , ` , , ` , ` , , ` - 6 and intended to represent that inspection lot for acceptance. 3.2.8 specim specimen, en, n—an ind indivi ividua duall test article upon whi which ch thickne thic kness ss mea measur suremen ements ts or wei weight ght det determ ermina ination tionss are per per-formed. 4.4 Threade Threaded d Articles Articles— —The zin zincc coa coating ting on thr thread eadss sha shall ll nott be su no subj bjec ecte ted d to a cu cutti tting ng,, ro roll llin ing, g, or fin finis ishi hing ng-t -too ooll operation, unless specifically authorized by the purchaser. In order to meet overtapping allowances, tapping the threads of nuts or tapped holes after galvanizing is not prohibited. 3.2.9 specimen coating thickness, n—the average thickness from no less than five test measurements on a specimen, when each measurement location is selected to provide the widest dispersion disper sion (in all applic applicable able directions) directions) of locations within the specimen volume. 4.5 T Touchouch-up up and Repai Repair— r—Bar Baree sp spot otss th that at ar aree fo foun und d on parts after galvanizing shall be renovated by use of the methods found in Practice A780 if the following criteria are met. The bare spots shall have an area totalling not more than 1 % of the surface area to be coated excluding threaded areas of the piece and the bare spots shall not include any threaded areas of the 3.2.10 thread threaded ed are areas, as, n—the sections of a steel part that have threads formed before hot-dip galvanizing. TABLE 1 Thickness or Weight [Mass] of Zinc Coating for Various Classes of Material NOTE 1— Length of the piece, stated in Classes B-1, B-2, and B-3, refers to the finished dimension of the piece after fabrication. Weightt [Mass Weigh [Mass]] of Zinc Coatin Coating, g, oz/ft 2 [g/m2 ] of Surface, Minimum Coating Thickness, mils [microns], Minimum Class of Material Average of Specimens Tested Any Individual Specimen Average of Specimens Tested Any Individual Specimen Class A— A—Castings—Malleable Iron, Steel Class B—Rolle —Rolled, d, presse pressed, d, and forged articl articles es (except those which would be included under Classes C and D): B-1—5⁄8 in. [15.88 mm] and over in thickness and over 15 in. [381 mm] in length B-2—under 5⁄8 in. [15.88 mm] in thickness and over 15 in. [381 mm] in length B-3—any thickness and 15 in. [381 mm] and under in length Class C—Fasteners over 3⁄8 in. [9.52 mm] in diameter and similar articles. Washers 3⁄16 in. and greater [4.76 mm and greater] in thickness Class D—Fasteners 3⁄8 in. [9.52 mm] and under in diameter, rivets,, nails and simila rivets similarr articl articles. es. Washers under 3⁄16 in. [4.76 mm] in thickness 2.00 [610] 1.80 [550] 3.4 [86] 3.1 [79] 2.00 [610] 1.80 [550] 3.4 [86] 3.1 [79] 1.50 [458] 1.25 [381] 2.6 [66] 2.1 [53] 1.30 [397] 1.25 [381] 1.10 [336] 1.00 [305] 2.2 [56] 2.1 [53] 1.9 [48] 1.7 [43] 1.00 [305] 0.85 [259] 1.7 [43] 1.4 [36] Copyright ASTM International Provided by IHS Markit under license with ASTM No reproduction or networking permitted without license from IHS 2Licensee=SNC Lavalin Inc - Montreal - Main/5938179019, User=Ben ayed, rached Not for Resale, 11/23/2018 07:27:07 MST A153/A153M − 16a piec ece. e. Th Thee th thic ickn knes esss of th thee re repa pair ir sh shal alll be eq equa uall to th thee pi surrou sur roundi nding ng gal galvan vanized ized coat coating ing exc except ept for rep repairs airs mad madee by paints containing zinc dust in which case the thickness of the repair shall be 50 % greater than the thickness of the galvanized coating required for the class of material, but shall not be greater than 4.0 mils [100 µm]. Repair thickness measurements shall be made in accordance with Practice A780 A780.. The galvanizer shall make repairs unless directed by the purchaser to deliver deli ver item itemss unr unrepa epaire ired d for sub subseq sequen uentt ren renova ovatio tion n by the purchaser. 5. Wo Workmanship, rkmanship, Finish, and Appearance Appearance 5.1 The zin zinc-c c-coate oated d art article icless sha shall ll be fre freee fro from m unc uncoat oated ed areas, blisters, flux deposits, dross inclusions, and other types of projections that would interfere with the intended use of the articles, or other defects not consistent with good galvanizing practice. 5.2 The zinc coa coatin ting g sha shall ll be rea reason sonabl ably y smo smooth oth and uni uni-form in thickness. NOTE 2—Smoothness of surface is a relative term. Minor roughness that does not interfere with the intended use of the part, or roughness that is related to the as-received (ungalvanized) surface condition of the part, shall not be grounds for rejection. NOTE 3— 3—Sin Since ce thi thiss spe specifi cificati cation on is app applic licabl ablee to item itemss tha thatt are centrifuged or otherwise handled to remove excess bath metal (see 1.2 1.2)), irregu irr egular lar coa coatin ting g dis distri tribut bution ion is not nor normal mally ly enc encoun ounter tered. ed. Dra Draina inage ge problems, which manifest themselves as local excess coating thickness that would interfere with function or as edge tears or spikes that present a safety hazard because of their sharpness, are grounds for rejection under the terms of 5.1 5.1.. 5.3 Emb Embritt rittleme lement nt is a pot potenti ential al con condit dition ion of ste steel el tha thatt is cold-wo cold -worke rked, d, dep depend ending ing on suc such h fac factor torss as the stee steell typ typee (strength level, aging characteristics), thickness, degree of cold work, and galvanizing process. The galvanizer, the designer and the fabricator shall take precautions against embrittlement. The precautions to fabricate properly and prepare the material for gal galvan vanizin izing g to pre preven ventt emb embrit rittlem tlement ent are des descri cribed bed in Practice A143/A143M A143/A143M.. NOTE 4—Low service temperatures increase the risk of brittle failure of all plain carbon steels including those which have been galvanized. This temperature temper ature embrittling embrittling ef effect fect varies with type of steel. The expec expected ted servicee tempe servic temperature rature should thus be taken into accoun accountt when selecting steels for galvanizing. 5.4 Malleab Malleable le castings shall be of such composition as will preclude preclu de the pos possib sibilit ility y that the they y bec become ome emb embritt rittled led by the galvanizing process, or they shall be either cooled from the anneal, or subsequently heat-treated so as to immunize them against embrittlement. 5.5 The zinc coating shall adhere adhere tenaciously tenaciously to the surface of the base metal. 5.6 If the galvanized material material covered by this specification specification is bent or otherwise fabricated to the degree that causes the zinc coatings to stretch or compress beyond the limit of elasticity, an any y cr crac acki king ng or fla flaki king ng ofnot theebeco th coat atin ing g for resu re sulti lting ng fr from om th thee bending or fabricating shall cause rejection. 5.7 High strength strength bolts, typically over 150,000 150,000 lb/in.2 ultimate tensile strength, may be subject to hydrogen embrittleCopyright ASTM International Provided by IHS Markit under license with ASTM No reproduction or networking permitted without license from IHS ment. Practices to safeguard against hydrogen embrittlement are described in Specification A143/A143M A143/A143M.. 6. Sampl Sampling ing 6.1 Test specimens specimens shall be sel selecte ected d at ran random dom from eac each h inspection lot. 6.2 The method of selection selection and sample sample size shall be agreed upon between the galvanizer and the purchaser. Otherwise, the sample size selected from each lot shall be as follows: Number of Pieces in Lot 3 or less 4 to 500 501 to 1200 1201 to 3200 3201 to 10 000 10 001 and over Sample Size all 3 5 8 13 20 6.3 A specim specimen en that fails to confor conform m to a requirement requirement of this specification shall not be used to determine the conformance to other requirements. 6.4 The method of sampling for fasteners fasteners that are required to meet the standards of the Fastener Quality Act is described in Guide F1470 F1470.. Sample quantities and definitions of terminology are included in the referenced specification. 7. Test Methods Methods 7.1 Test estss sha shall ll be mad madee to ensure ensure tha thatt the zinc coating coating is being furnished in accordance with this specification and as specified for the following: 7.1.1 Minimu Minimum m coating weight [mass] or minimum coating thickness in 4.3 4.3.. 7.1.2 Finish and appearanc appearancee in 5.1 aand nd 5.2 5.2.. 7.1.3 Embrit Embrittlement tlement in 5.3 and 5.4 5.4.. 7.1.4 Adher Adherence ence in 5.5 5.5.. 7.2 Average Weight [Mass] of Coating: 7.2.1 The average average weight [mass] of the zinc coating shall shall be determined by weighing specimens after pickling and drying and aga again in aft after er gal galvan vanizin izing g unl unless ess the met method hod des descri cribed bed in 7.2.2 is us used ed.. Th Thee nu numb mber er of sp spec ecime imens ns th that at ar aree us used ed to det determ ermine ine the averag ragee of an ins inspec pectio tion n lot shall be der derive ived d from Section Sectio n6 6..ave NOTE 5—This method does not take into account the weight [mass] of iron reacted from the article that is incorporated into the coating. It will thus underestimate coating weight [mass] by up to approximately 10 %. Base metal reactivity will affect the extent of underestimation. 7.2.2 In the case of mate 7.2.2 materia rials ls ins inspec pected ted aft after er gal galvan vanizin izing, g, the average weight [mass] of coating shall be determined by stripp str ipping ing the num number ber of spe specim cimens ens der derive ived d in Sect Section ion 6 in accordance with Test Method A90/A90M A90/A90M,, and averaging the result res ultss of the ind indivi ividua duall spe specime cimens, ns, unl unless ess the meth method od described in 7.2.1 is used. 7.3 Average Thickness of Coating: 7.3.1 In the case of fasteners fasteners such as bolts, nuts, and screws, screws, the determination of the thickness of coating shall be made on a portion of the article that does not include any threads. 7.3.2 The average thickness thickness of coating shall be determined by magnetic thickness gage in accordance with Practice E376 unless the method described in 7.3.3 is used. The thickness 3Licensee=SNC Lavalin Inc - Montreal - Main/5938179019, User=Ben ayed, rached Not for Resale, 11/23/2018 07:27:07 MST ` , , ` , ` , , ` , , ` ` , ` ` ` , ` , , ` ` , ` , , , ` , , , ` , , , , ` ` , ` , ` - A153/A153M − 16a shall be measured on at least five widely separated spots on a specimen. No individual spot measurement shall be cause for rejectio reje ction. n. If an ind individ ividual ual spo spott doe doess not provide provide a coa coating ting thickne thic kness ss rea readin ding, g, thi thiss spo spott mus mustt be rep repair aired ed in acc accord ordanc ancee with 4.5 4.5.. Th Thee fiv fivee or mo more re in indi divi vidu dual al co coati ating ng th thick ickne ness ss measurements on a specimen must be averaged to determine the specimen average coating thickness. The average coating thickness for the inspection lot is determined by averaging the specimen average coating thickness values for the number of specimens derived from Section 6. 7.3.3 The thickness thickness of coating shall be determined by cross cross section sect ion and opt optical ical meas measure uremen mentt in acco accorda rdance nce with Test Method B487 B487,, unless the method described in 7.3.2 is used. The thickness thus determined is a point value. No less than fivee su fiv such ch me measu asure reme ment ntss sh shall all be ma made de at lo loca catio tions ns on th thee specimen, which are as widely dispersed as practical, so as to be representative of the whole surface of the specimen. The average of no less than five such measurements is the specimen average coating thickness. The average coating thickness for the ins inspec pection tion lot is det determ ermine ined d by ave averag raging ing the spe specim cimen en average coating thickness values for the number of specimens derived from Section 6. prior to shipments, unless otherwise specified, and shall be so conducted as not to interfere unnecessarily with the operation of the works. 7.4 Finish and Appearance—The test for finish and appearancee sha anc shall ll be con conduc ducted ted thr throug ough h vis visual ual ins inspec pection tion wit withou houtt 9.5 Materia Materials ls that have been rejected for reasons other than embrittlem embrit tlement ent are not pro prohib hibited ited fro from m bei being ng str stripp ipped, ed, additional magnification. 7.5 Embrittlement—Ha Hard rdwa ware re th that at is su susc scep eptib tible le to em em-brittlement shall be tested in accordance with Practice A143/ A143M.. Th A143M Thee te tests sts sh shall all be pe perf rfor orme med d th thro roug ugh h ag agre reem emen entt between the galvanizer and the purchaser. regalv regalvanized anized, , and resubmitted for test of and inspection. tion. They shall then conform to the requirements thisinspec specification. 7.6 Adherence—Determine adherence of the zinc coating to the surface of the base metal by cutting or prying with the point of a stout knife, applied with considerable pressure in a manner tending to remove a portion of the coating. The adherence shall be considered inadequate if the coating delaminates in the form of a layer of skin so as to expose the base metal in advance of thee kn th knif ifee po poin int. t. Do no nott us usee tes testin ting g ca carr rried ied out at ed edge gess or corner cor nerss (po (points ints of low lowest est coa coating ting adh adhere erence nce)) to det determ ermine ine adherence of coating. Likewise, do not use removal of small particl par ticles es of the coa coatin ting g by par paring ing or whi whittli ttling ng to det determ ermine ine failure. 8. Inspe Inspectio ction n 8.1 The ins inspec pector tor rep repres resent enting ing the pur purcha chaser ser sha shall ll hav havee access at all times while work on the contract of the purchaser is being performed, to those areas of the manufacturer’s work whic wh ich h co conc ncer ern n th thee ap appl plica icatio tion n of th thee zin zincc co coat atin ing g to th thee material ordered. The manufacturer shall afford the inspector all reasonable facilities to satisfy him that the zinc coating is being bein g fur furnis nished hed in acco accorda rdance nce wit with h thi thiss spe specifi cificati cation. on. All inspection and tests shall be made at the place of manufacture 9. Reje Rejectio ction n and Retest 9.1 For all gal galvan vanize ized d arti articles cles except tho those se fas fasten teners ers tha thatt must meet the requirements of the Fastener Quality Act, the following sections are used to determine rejection and retesting. 9.2 When partial inspection inspection of materials to determine conformity with visual requirements of Section 5 warrants rejection of a lot, the galvanizer is not prohibited from sorting the lot and submitting it once again for inspection. 9.3 The number number of specimens in a sample of a lot permitted to fail to conformance tests shall be agreed upon between the galvanizer and the purchaser. 9.4 If a se 9.4 sett of te test st sp spec ecim imen enss fa fail ilss to co conf nfor orm m to th thee requirements of this specification, two additional sets shall be tested, test ed, bot both h of whi which ch sha shall ll con confor form m to the req requir uireme ements nts in ever ev ery y re resp spec ect, t, or th thee lo lott of ma mate teri rial al re repr pres esen ente ted d by th thee specimens shall be rejected. NOTE 6—Conformance to this specification does not guarantee “zero defects.” defect s.” Dep Depend ending ing on the siz sizee and con configu figurati ration on of the par parts ts (sm (small all diameter threaded parts and small washers as examples), a small amount of “fall out” may exist in an inspection lot that is not detected during a sample inspection. Issues include, but are not limited to, zinc build up in the threads or bonded washers. Handling of these types of issues need to be negot negotiated iated between the purch purchaser aser and suppl supplier ier.. 10. Pack Packagin aging g 10.1 The supplier supplier shall employ such methods of packaging packaging zinc-coated articles as shall be required to ensure their receipt by the purchaser in satisfactory condition, with the use to be made of the article being taken into consideration. 11. Certificatio Certification n 11.1 When specified 11.1 specified in the purchase purchase order or contract, the purchaser shall be furnished certification that samples representing sentin g each inspection inspection lot have been either tested or inspec inspected ted as directed by this specification and the requirements have been met. When specified in the purchase order or contract, a report of the test results shall be furnished. 12. Keyw Keywords ords 12.1 coa 12.1 coatin tings, gs, zin zinc; c; gal galvan vanized ized coa coatin tings; gs; stee steell har hardwa dware, re, zinc coated; steel products, metallic coated; zinc coatings, steel products --`,`,``,,,,`,,,`,,,`,``,,`,```,-`-`,,`,,`,`,,`--- Copyright ASTM International Provided by IHS Markit under license with ASTM No reproduction or networking permitted without license from IHS 4Licensee=SNC Lavalin Inc - Montreal - Main/5938179019, User=Ben ayed, rached Not for Resale, 11/23/2018 07:27:07 MST A153/A153M − 16a SUMMARY OF CHANGES Committ Comm ittee ee A0 A05 5 ha hass id iden entifi tified ed th thee lo locat catio ion n of se selec lected ted ch chan ange gess to th this is st stan anda dard rd si sinc ncee th thee las lastt iss issue ue,, A153/A153M-16, that may impact the use of this standard. 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