DeslgnatiOn:A12=`123M-02

Standard Specification for

:p Caaneo COttngs on tton and StiThis standard is issued under the fixcd designation A 123/A l23M; the number immediately following the designation indicates the yearoforiginal adoption or, in the case ofrevision, the year of last rcvision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last rcvision or reapproval.This standard has been approved for we by agencies of the Department of Defense.

l. Scope1.1 This specification covers the requirements ior zinc

coating (galvanizing) by the hot-dip process on iron and steelproducts made from rolled pressed and forged shapes, castings,plates, bars, and strips.

1.2 This specification covers both unfabricated products andfabricated prducts, for example, assembled steel products,stuctual steel fabrications, large tubes already bent or weldedbefore galvanizing, and wire work fabricated from uncoatedsteel wire. This specification also covers steel forgings and ironcastings incorporated into pieces fabricated before galvani'ingor which are too large to be centrifuged (or otherwise handledto remove excess galvrnizing bath metal).

Nore l-This spcc.ification covers those products previously addressed-

in Specifications A 123-78 and A 38G7E.

-l f .f fni. specification does not apply to wire, pipe, tube, or, steel sheet which is galvanized on specialized or continuouslines, or to steel less than 22 gage (0.0299 in.) 10.76 mml thick.

1.4 The galvanizing of hardware items that are to becentrifuged or otherwise handled to remove excess zinc (suchas bolts and similar threaded fasteners, castings and rolled,pressed and forged items) shall be in accordance with Speci-fication A 153/A 153M.

1.5 Fabricated reinforcing steel bar assemblies are coveredby the present specification. The galvanizing of separatereinforcing steel bars shall be in accordance with SpecificationA't67tA767M.

1.6 This specification is applicable to orders in eitherinch-pound units (as A 123) or SI units (as A l23M). Inch-pound units and SI units arc not necessarily exact equivalents.Within the text of this specification and where appropriate, SIunits arc shown in parcntheses. Each system shall be usedindependently of the other without combining values in anyway. In the case of mders in SI units, all testing and inspectionshall be done using the metric equivalent of the test or

rnspection method as appropriate. In the case of orders in SIunits, such shall be stated to the galvanizer when the order isplaced.

2. Referenced Documents2.1 ASTM Standards:A47lA 47M Specification for Fenitic Malleable kon Cast-

ingstA 90/A 90M Test Method for Weight Massl of Coating on

Iron and Steel Articles with Zinc or Zinc-Alloy Coatings3A 143 Practice for Safeguarding Against Embrittlement of

Hot-Dip Galvanized Structural Steel Products and hoce-dure for Detecting Embrittlement3

A 153/A l53M Specification for Zinc Coating (HorDip) onIron and Steel Hardware3

A 384/A 384M Practice for Safeguarding Against Warpageand Distonion During Hot-Dip Galvanizing of Steel As-semblies3

A 385 Practics fs1 Preyiding HiCh-Quality Zinc Coatings(Hot-Dip)3

A7671A767M Specification for Zinc-Coated GalvanizedSteel Bars for Concrete Reinforcementa

A 780 Practice for Repair of Damaged and Uncoated Areasof Hot-Dip Galvanized Coatings3

A 902 Terminology Relating to Metallic Coated Steel Prod-ucts3

B 6 Specification for ZincsB 487 Test Method for Measurement of Metal and Oxide

Coating Thicknesses by Microscopic{ ftnminafion of aCross Section6

B 6O2 Test Method for Attribute Sampling of Metallic andInorganic Coatings6

E 376 Practice for Measuring Coating Thickness byMagnetic-Field or Eddy-Currcnt @lectromagnetic) TestMethodsT

I This spccificatioo is un&r thc jurisdictioa of ASTM Comnittcc A05 onMctallic Coatcd Iron and Stccl Products and is the direct rcsponsibility ofSubcommittcc A05.13 on Stsuctural Shapcs and Hardware Speciications.

Cturcnt cdition appmvcd October 10, 20(D. Published Dccembcr 2002. Origi-nally publishcd rs A 123

- 28 T. [,ast previous edition A 123

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???? Copynght OASTM tntomallonal, 1OO Bar Ha6or Driv, PO Box C7m, West Conshohockon, pA 1942&2959. United Statss.

3. Terminologr (See F'ig. 1)3.1 Defnitions:3.1.1 The following terms and definitions are specific to this

specification. Terminology A 902 contains other terms anddefinitions relating to metallic-coated steel products.

3.2 Defuitions of Terms Specific to This Snndard:3.2.1 average coating thickness, n-the average of three

specimen coating thicknesses.3.2.2 blach ddJ-denotes the condition of not galvanized or

otherwise coated. For purposes of this specification the word

{ff I nuAi23M-02

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"black" does not refer to the color or condition of surface, or toa surface deposit or contamination.

3.2.3 coating thiclorcss grade, r*+he numerical value fromTable I at the intersection of a material category and athickness range.

3.2.4 gross dross inclusions, n-the iron/zinc intermetallicspresent in a galvanized coating in a form other than finelydispersed pimples.

3.2.4.1 Discussion-These inclusions would create an ex-posed steel spot if they were removed from the coating. These

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MultlSoecimm ArticlerArticles whose Surface Area is greater than 160 sq.in. (100,000 sq. mm)

Each Specimen (5 or more measurements widelyg]ispersed) must have Minimum Average CoatinjThickness of Cfabb 1) -l gradeEachTest Article in the Sample (3 Specimens each) musthave Minimum Average CoatingThibkness of (Table 1)

3 Test Attcieseach compo3ed OfO Specimen3

Specimen

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Artic:es whose Surface Area is equa:to oriess man 160 sqJn.(loo,000 Sq.mm)

3 Test Articies3 Specimens

Each Specimen (5 or more measurements widely dispersed) musthave Minimum Average Coating Thickness of (Tabte 1) -1 gradeAll Test Articles (Specimens) Together must have MinumumAverage Coating Thickness ol (Table 1)

FlG. 1 Slngle and ilulfpeclmen Ardcteg 0

{ff a 12stA12sr-o2TABLE 1 lllnlmum Averege Coetlng Thlckness Grade by llaterlal Catagory

Material C.tegoryAll Spedmene Tested

Steel ThftJoess Rango (MasuGd), In. (mm)?

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{ft l lnstlr2su-o25.3 Casnngs-The composition and heat treatrnent of iron

and steel castings shall conform o specifications designated bythe purchaser. Some types of castings have been known toshow potential problems with predisposition to being em-brittled during the normal thennal cycle of hot-dip galvanizing.It is the responsibility of the purchaser to heat treat orotherwise allow for the possibility of such embrittling phenom-ena. The requirements for malleable iron castings to begalvanized shall be as stated in Specification A 47.

5.4 Zinc---T\e zinc used in the galvanizing bath shallconform to Specification B 6. If a zinc alloy is used as theprimary feed to the galvanizing bath, then the base materialused to make that alloy shall conform to Specification B 6.

5.5 Bath Composition-The molren metal in the workingvolume of the galvanizing bath shall contain not less than anaverage value of 98.0 Vo zinc by weight.

Nore 3-The galvanizer may choose to add trace amounts of certainelements (for exarnple, alurniaum, nickel, and tin) to the zinc bath to helpin the processing ot certiln reacuve steels or to enhance the cosmeticappearance of fie finished product. The use of these trace elements ispermitted provided that the bulk chemistry of the galvanizing bath is atleast 98.0 % zircby weighr The elements can be added to the galvanizingbath as part of a pre-alloyed zinc feed, or they can be addcd to tbe bath bythe galveniz6x using a master feed alloy.

6. Coating Properties6.1 Coating Thicbtess-T\e average thickness of coating

for all specimens tested shall conform to the rcquirements ofTable I for the categories and thicknesses of the material beinggalvanized. Minimum average thickness of coating for anyindividual specimen is one coating grade less than that requiredin Table l. Where products consisting of various materialthicknesses or categories are galvanized, the coating thicknessgrades for each thickness range and material carcgory ofmaterial shall be as shown in Table 1. In the case of orders inSI units, the values in Table 1, shall be applicable as metricunits in micrometres. In the case of orders in inch-pound units,the measured value shall be converted to coating grade units bythe use of Table 2.1\e specification of coating thicknessesheavier than ttrose required by Table I shall be subject tomutual agreement between the galvanizer and the purchaser.(Frg. 2 is a graphic representation of the sampling andspecimen delineation steps, and Fig. 3 is a graphic representa-tion of the coating thickness inspection steps.)

6.1.1 For articles whose surface area is gteatil than 160in.2 [100 000 --2] (multi-specimen articles), each test article

Nore l-Each specirnen comprises nominally one third of the totalsurface area of the anicle. A minimum of five measurements should bemade within the volume of each specimen, as widely dispersed wiihin thatvolume as is pracrical, so as to represent as much as possibie, the generalcoaring drickness within that specimen volume.

FlG. 2 Artacles Made of llany Components

in the sarupie musi meet the appropriate minimum averagecoating thickness grade requirements of Table l, and eachspecimen coating thickness grade comprising that overallaverage for each test article shall average not less than onecoating grade below that rcquircd in Table 1.

6.1.2 For articles whose surface area is equal !o or less than160 in.2 tlm 000 mm21 lsingte-specimen articles), the averageof all test articles in the sample must meet the appropriateminilnsln average coating thickness grade requirements ofTable l, and for each test article, its specimen coating thicknessshall be not less than one coating grade bclow that required inTable l.

6.1.3 No individual measurement, or cluster of measure-ments at the same general location, on a test specimen shall because for rejection under the coating thickness requirements ofthis specification provided that when those measurements areaveraged with the other dispersed measurements to determinethe specimen coating thickness grade for that specimen, therequirements of 6.1.1 or 6.1.2, as appropriate arc met.

Ncrm zl-The soating thiclmess grades in Table I represent j[6 mini-mum value obtainable with a high level of confidence for the rangestyprcally found in erch matcrial category.While most s6ering thicknesscswill be in excess of those values, some materials in each category may beless reactive (for exarnple, because ofcbemistry or surface conditioa) thanother materials of the stcel category spectrum" Therefore, some articlesmay have a coatirg grade at or close to dre minimrm requircment shownin Table L Ia such cases, the precision and accuracy 6f ths ssaringthickness measuring technique should be taken into consideration when

TABLE 2 Coatlng Thlckne$ Gradc^CoatingGrade gtrf

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^ The values in micromtros (|Jm) aro based on the Coating Grade. The other valuos are based on @nversions using th6 following iormulas: mils =

ym x o.G3{tg7;ozltP =pm x 0.02316; g/m 2 = ;rm x 7.067.

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FlG. 3 Cosilng Thlcknest lmpoctlon St ps

rcjecfing such articles for coati.g thictness 5sl6q/ thet required by thisspocifcation. Purchasers desiring a guarantee of heavier coatiags than theminimrrm thicknesses shown hcrein should use the special requircrcnts(see 4.1.6) to spcify couing thictncss grades higher than those shown inTable l. In addition, the purchaser should anticiparc the need for testbatches or extra prcparation stqrs, or botb, such as blasting bcforegalvrrrizing or othcr mcthods, to attempt to reach the highcr requircments

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with consistcncy. Some higher-thu-srendrrd thicknesses may be imprac_tical or unattainable.

6.2 Finish--T\e coating shall be continuous (except asprovided below), and as reasonably smooth and uniform in

- thickness as the weight, size, shape of the item, and necessaryhandling of the item during the dipping and draining operationsat the galvanizing kettle will permit. Except for local excess

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coating thiclness which would interfere with the use of theproducl or make it dangerous to handle (edge tears or spikes),

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rejection for nonuniform coating shall be made only forplainlyvisible excess coating not rclated to design factors such as

- holes, joints, or special drainage problems (see Note 6). Since

surface smoothness is a relative 0erm, minor roughness thatdoes not interfere with the intended use of the product, orroughness that is related !o the as-rcceived (un-galvanized)surface condition, steel chemisty, tr stel reactivity to zincshall not be grounds for rcjection (see Note 7). Surfaceconditions relarcd to deficiencies related to design, der^iling, orfabrication as addressed by Practice A 385 shall not be groundsfor rejection. The zinc coating on threaded components ofarticles galvanized under this specification shall conform tothat required in Specification A 153/A 153M. Surfaces thatremain uncoated after galvanizing shall be renovated in accor-dance with the methods in Practice A 780 unless directed bythe purchaser to leave the uncoated areas untreated for subse-quent renovation by the purchaser.

6.2.1 Each area subject to renovation shall be I in. [25 mm]or less in its narrowest dimension.

6.2.2 T\e total area subject to renovation on each articleshall be no more than Vz of | 7o of the accessible surface areato bc coated on that article, or 36 in.2 per short ton [256 cm2 permetric ton] of piece weight, whichever is less.

Norr S-Inaccessible surface areas are those which cannot be reachedfor appropriate surface preparation and application of repair materials asdescribed in Practice A 780. Sucb inaccessible arcas, for example, wouldbe the internal surfaces of certain tenks, polcs, pipes, tubes, and so forth.

6.2.3 T\e thickness of renovation shall be that required bythe thickness grade for the appropriate material calegory andthickness range in Table I in accordance with the requirementsof 6.1, except that for renovation using zinc paints, thethickness ofrenovation shall be 50 % higher than that requiredby Table l, but not grcaler than 4.0 mils.

6.2.4 When areas requiring rcnovation exceed the criteriapreviously provided, or are inaccessible for repar, the coatingshall be rcjected.

Ncne 6--The requirements for the fnish of a galvenized productaddress themselves to a visual type of inspection. They do not address tbematter of measured coating thickness variations that can be encounteredbecause of different steels or different thicknesses of a given steel beingused in an assembly.

Nore 7-Ircms which are preparcd for galvaniziag by abrasive clean-ing will generally develop a thicket coating with a moderately roughersurface.

6.3 Threaded Components in Assenblies-The zinc coatingon extemal threads shall not be subjected to a cutting, rolling,or finishing tool operation, unless specifically authorized by thepurchaser. Inernal tkeads are not prohibited from beingtapped or retapped after galvnnizing. Coatings shall conform iothe rcquirements of Specifcation A 153/A 153M.

6.4 Appearance-Upon shipment ftom the galvanizing fa-cility, galvanized articles shall be free from uncoated areas,.blisten, flux deposits, and gross dross inclusions. Lumps,projections, globules, or heavy deposits of zinc which willinterfere with the intended use of the material will not bepermitted. Plain holes of Vz-in. [2.5-mn] diarneter or moreshall be clean and reasonably free from excess zinc. Marks inthe zinc coating caused by ongs or other items used infu6dling the article during the lalvanizing operation shall notbe cause for rejection unless such marks have exposed the basemetal and the bare metal areas exceed allowable maximums

TestArticles Fl

Singio Matena!

Attb:e SurfaceArea)160207100,000m

Subd"ide Each Test e into ThrooSpecimen

Test Each Specimenbr Cornplia0th

Seclion 6.1

Avg.of Al:Specimencomplos wihSeclon 6.1

Avg.cOrnpliesWith Seclion 6 1

{ff I nuA123M-02from 6.2.1 nd 6.2.2. The pieces shall be handled so that aftergalvanizing they will not freeze together on cooling.

Norc 8-Depending upon prodrct design or matcrial thickness, orboth, filning or excess zinc buildup in plain holes of less than %-in.[2.5-mm] diameter may occur tbat requires additional work to make theholes usable as intended.

6.5 Adherence-The zinc coating shall withstand fua1rllingconsistent with the nature and thickness of the coating and thenormal use of the article, without peeling or flaking.

Nore 9-Although some material may be formed after galvanizing, ingeneral the zinc coating on the articles covered by this specification is tooheavy to permit severe bending without damaging the coating.

7. Sampling7.1 Sampling of each lot shall be performed for conform-

ance with the requirements of this specification.7.2 Alot is a unit of production or shipment from which a

sample is taken for testing. Unless otherwise agreed uponbetween the galvanizer and the purchaser, or established withinthis specification, the lot shall be as follows: For testing at agalvanizer's facility, a lot is one or more articles of the sametype and s2g gsmprising a single order or a single deliveryload, whichever is the smaller, or any number of articlesidentified as a lot by the galvanizer, when these [ave beengalvanized within a single production sbift and in the samebath. For test by the purchaser after delivery the lot consists ofthe single order or the single delivery load, whichever is thesmaller, unless the lot identity, established in accordance withthe above, is maintained and clearly indicated in the shipmentby the galvanizer.

7.3 The method of selection and number of test specimensshall be agreed upon between the galvanizgl and the purchaser.Otherwise, the test specimens shall be selected at random fromeach lot. In this case, the minimum number of specimens fromeach lot shall be as follows:

Numbr ol Piecs in Lot

3 or l6ss4to 5(x)

5()1 to 12()O1 201 to 3 2lX)3 201 lo 10 O0O

10 001 and ovr

Numbr ot Specimens

all358

1320

Nsrr l0-Where a number of identical items are to be galvanized, astatistical sampling plan may be desired. Such a plan is contained in TestMethod B 602 which ad&esses sanpling procedures for the inspection ofelecuodeposited 66trlliq coatings and relarcd finishes. If Test MethodB 602 is used, the level of sampting shall be agreed upon bettileen thegalvanizer and the purchascr at the time the coating order is placed.

7.4 A test specimen which fails to conform to a requirementof this specification shall not be used to deterrnine theconformance to other requirements.

t. Ibst Methods8.1 Test Requirements---The following tests shall be con-

ducted to ensure that the zinc coating is being furnished inaccordance with this specification. The specifying of tests foradhesion and embrittlement shall be subject to mutual agree-ment btween the galvanizer and purchaser. Visual inspectionof the coating shall be made for compliance with the require-menB.

8.2 Thiclouss of Coating lesr-The thickness of coating isdetermined by one or more of the three methods described asfollows.

8.2.t Magnetic Thiclorcss Measurements- The thickness ofthe coating shall be determined by magnetic thickness gagemeasurcments in accordance with Practice E 376 unless themethods described n 8.2.2,8.2.3, or 8.2.4 are used. For eachspecimen (as described in 3.2.9) five or more measurementsshall be made at points widely dispersed throughout thevolume occupied by the specimen so ils to represent as much aspractical, the entire surface area of the test specimen. Theaverage of the five or more measurements thus made for eachspecimen is the specimen coating thickness.

8.2.1.1 For articles whose surface area is greater than 160in.21t00000 mn2l (multi-specimen articles as described in3.2.6), the average of the three specimen coating thicknessgrades comprising each &est article is the average coatingthickness for that test article. A specimen must be evaluated foreach steel category and material thickness within the require-ments for each specimen of the test article.

8.2.1.2 For articles whose surface area is equal to or lessthan 160 in.2 [100 000 mm21 (single-specimen articles asdescribed in 3.2.8), the average of all specimen coatingthickness grades is the average coating thickness for thesample.

8.2.1.3 In the case of threaded components, the thickness ofcoating shall be made on a portion of the article that does notinclude any threads.

8.2.1.4 The use of magnetic measurement methods is ap1propriate for larger articles, and is for smallerarticles when there is sufEcient flat surface area for the probetip to sit flat on the surface using Practice E376.

8.2.2 Stripping Method-T\e average weight of coatingshall be determined by stripping a test article, a specimenremoved from a test article, or group of test articles in the caseof very small items such as nails, etc., in accordance with TestMethod A90/A9OM unless the methods described in 8.2.1,8.2.3, or 8.2.4 arc used. The weight of coating per unit areathus determined is converted to equivalent coating thicknessvalues in accordance with Table 2 (rounding up or down asappropriate). The thickness of coating ftu5 efteingd is the testarticle coating thickness, or in the case of a specimen removedfrom a test article, is the specimen average coating thickness.

8.2.2.1 The stripping method is a destructive test and isappropriate for single specimen articles, but is not practical formulti-specimen articles.

8.2.3 Weighing Before andAfrer Galvanizing:fhe averageweight of coating shall be determined by weighing articlesbefore and after galvanizing, subracting the first weight fromthe second and dividing the result by the surface area unless themethods described in 8.2.1, 8.2.2, or 8.2.4 arc used. The firstweight shall be determined after pickling and drying and thesecond after cooling to ambient lemperature. The weight ofcoating per unit area thus determined is converted to equivalentcoating thickness values according to Table 2 (rounding up o{down as appropriate). The thickness of coating thus obtained isthe test article coating thickness.

{ffi e :nsAlnsr-u28.2.3.1 The weighing before and after method is appropriate

for single-specimen articles, but is not p,ractical ior lnulti-;pecimen articles.

Nore ll-Both the stripping method and the weighing before and aftermethod do not take into account the weight ofiron reacted from the articlehat is incorporated into the coating. Thus, the methods may undercstimate:oating weight (and thercfore the calculated thickness) by up to l0 %. Theaccuitcy of both methods will be influenced by the accuftlcy to which thesurface area of the articles tested can be determined.

8.2.4 Microscopy-T\e thickness of coating shall be deter_mined by cross-sectional and optical measurement in accor_dance with Test Method B 487 unless the methods described in3.2.1. 8.2.2, or 8.2.3 are used. The thickness thus determined isr point value. No less than five such measurements shall bemade at locations on the test article which are as widelvlispened as practical, so as to be representative of the wholeiurface ofthe test article. The average ofno less than five suchmeasurements is the specimen coating thickness.

8.2.4.1 The microscopy method is a destructive test and isppropriate for single-specinen articles, but is not practical formulti-specimen articles.

8.2.5 Referee Method-In the event of a dispute overhickness of coating measurements, the dispute shall be re_;olved as follows:

8.2.5.1 For multi-specimen articles, a new sample shall beaken randomly from the lot of material, which has twice the

\ rumber of test articles as the sample which failed to conforrnI to this specification. If the lot size is such that the sample size{ :annot be doubled, then the sample size shall be as previous,

rut the number of widely dispersed sites at which measure_ments were made shall be doubled, and these sites willconstitute the new sample. This new sample shall be measuredrsing magnetic thickness gages which have been catibrated forrccuracy against reference material thickness standards. Ifthelot is found to be nonconforming by the o"* semple, the;alvanizer has the right to sort the lot for conforming articlesry individual test, to rc-galvanize non-conforming articles, or

to renovate the nonconforming articles in accordance with 6.2.8.2.5.2 For single-specimen articles, a new sample shall be

aken randornly from the lot of material, which has twice the.rumber of test articles as the sample which failed to conform

^ to thil specification. The test method for the new sample shallrc selected by mutual agrement between the purchaser and;alvanizer. If the lot is found to be nonconforming by the newsample, the galvanizer ha.s the right to sort the lot for

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:onforming articles by individual 0est, to re_galvanize non_:onforming articles, or to renovate the nonconforming articlesrn accordance with 6.2.

8.3 Adhesion-Determine adhesion of the zinc coating tohe surface of the base metal by cutting or prying wittr the frintrf a stout knife, applied with considerable pressure in a mannertending to remove a portion of the coating. The adhesion shallrc considered inadequate if the coating flakes offin the form oft layer of the coating so as to expose the base metal in advanceof the knife point. Do not use tesring carried out at edges orcorners (points of lowest coating adhesion) to determine

adhesion of the coating. Likewise, do not use removal of smallparticles of the coating by paring or whittling to determinefailure.

8.4 Embrittlemenl-Test for embrittlement shall be made inaccordance with hactice A 143. These tests shall not berequired unless strong evidence of embrittlement is present.9. Inspection, Rejection, and Retest

9.1 Inspection by the Galvanizer-It is the responsibility ofthe galvanizer to ensure compliance with this specification.This shall be achieved by an in-plant inspection progr:rmdesigned to maintain the coating thickness, finish, and appear_ance within the requirements of this specification unless theinspection is performed in accordance with 9.2.

9.2 Inspection By the purchaser---The purchaser shall ac_cept or re.iect material by inspection either through the galva_nizer's inspector, the purchaser's inspector, or anindependentiaspector. The inspector representing the purchaser shall haveaccess at all times to those areas of tJre galvanizer,s facilitywhich concern the application of the zinc coating to ttrlmaterial ordered while work on the contract of the purihaser isbeing performed. The galvanizer shall afford the inspector allreasonable facilities to satisfy him that the zinc coating is beingfurnished in accordance with this specification.

9.3 l-ocation-The material shall be inspected at the galva-nizel's plant prior to shipment. However, by agreement thepurchaser is not prohibited from making tests which govern theacceptance or rejection of the materials in his own laboratoryor elsewhere

9.4 Reinspeuioz-When inspection of materials to deter_mine conformity with the visual requirements of 6.2 warrantsrejection of a lot, the galvanizer is not prohibited from sortingthe lot and submit it once again for acceptance after he hasremoved any nonconforming articles and replaced them withconforming articles.

9.5 The sanpting plan that was used when the lot was 6rstinspected shall be used for rcsampling of a sorted lot. Bymutual agreement, the galvanizer is not prohibited fromsubmitting the lot remaining after sorting and rcmoving non_conforming articles without replacement of the nonconfo-rrningarticles. In such case, the now-smaller lot shall be treated as inew lot for purposes of inspection and acceptance.

9.6 Marcrials that have been rcjected for reasons other thanembrittlement are not prohibited from being stripped andregalvanized and again submifted for inspection and test atwhich time they shall conform to the requirements of thisspecification.

10. Certificetionl0.l When specified in the purchase order or contract, the

purchaser shall be furnished certification that samples repre_senting each lot have been either tested or inspected as directedby this specification and the requirements have been met.When specified in the purchase order or contract, a report ofthe test rcsults shall be furnished.

11. Keywordsll.l coatings-zinc; galvanized coatings; steel products-

metallic coated; zinc coatings-steel products

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