2024年5月9日发(作者：)

Designation:D130–94(Reapproved2000)

e1

(21262°F),orboth,andhavingsuitablesupportstoholdthe

testtubesinaverticalpositionandimmersedtoadepthof

about100mm(4in.).Eitherwater,oil,oraluminumblock

bathsaresuitable.

5.2CopperStripCorrosionTestBomb,constructedof

stainlesssteelaccordingtothedimensionsasgiveninFig.1,

andcapableofwithstandingatestpressureof100psi(689

kPa).Alternativedesignsforthebombcapandsynthetic

rubbergasketmaybeusedprovidedthattheinternaldimen-

sionsofthebombarethesameasthoseshowninFig.1.

Providea25by150-mmtesttubeasalinerforholdingthe

sample.

5.2.1Provideliquidbathscapableofbeingmaintainedat40

61°C(10462°F)or10061°C(21262°F),orboth,and

havingsuitablesupportstoholdthetestbombinavertical

hmustbedeepenoughsothattheentirebomb

athmedium,use

wateroranyotherliquidwhichcanbesatisfactorilycontrolled

atthespecifiedtesttemperature.

5.3Thermometers,totalimmersion,forindicatingthere-

quiredtesttemperature,withsmallestgraduationsof1°C(2°F)

than25mm(1in.)ofthemercurythread

shouldextendabovethesurfaceofthebathatthetest

M12C(12F)orIP64C(64F)thermom-

eterissuitable.

5.4PolishingVise,forholdingthecopperstripfirmly

venient

typeofholder(seeAppendix)maybeusedprovidedthatthe

stripisheldtightlyandthatthesurfaceofthestripbeing

polishedissupportedabovethesurfaceoftheholder.

5.5ViewingTestTubes,flatglasstesttubes,areconvenient

forprotectingcorrodedstripforcloseinspectionorstorage(see

Appendix).

als

6.1WashSolvent—Anyvolatile,sulfur-freehydrocarbon

solventmaybeusedprovidedthatitshowsnotarnishatall

FIG.1CopperStripCorrosionTestBomb

whentestedat50°C(122°F).Knocktestgradeisooctaneisa

suitablesolventandshouldbeusedincaseofdispute.

(Warning—Extremelyflammable,seeA2.1.)

6.2PolishingMaterials—Siliconcarbidegritpaperofvary-

ingdegreesoffinenessincluding65-µm(240-grit)paperor

cloth;alsoasupplyof105-µm(150-mesh)siliconcarbidegrain

andpharmaceuticalgradeabsorbentcotton(cottonwool).

6.3CopperStrips:

6.3.1Specification—Usestrips12.5mm(

1

⁄

2

in.)wide,1.5to

3.0mm(

1

⁄

16

to

1

⁄

8

in.)thick,cut75mm(3in.)longfrom

smooth-surfaced,hard-temper,cold-finishedcopperof

99.9+%purity;electricalbusbarstockisgenerallysuitable

(seeAppendix).Thestripsmaybeusedrepeatedlybutshould

bediscardedwhenthesurfacesbecomedeformedonhandling.

6.3.2SurfacePreparation—Removeallsurfaceblemishes

fromallsixsidesofthestripwithsiliconcarbidepaperofsuch

degreesoffinenessasareneededtoaccomplishthedesired

with65-µm(240-grit)siliconcarbide

paperorcloth,removingallmarksthatmayhavebeenmadeby

ethestripin

washsolventfromwhichitcanbewithdrawnimmediatelyfor

finalpreparation(polishing)orinwhichitcanbestoredfor

futureuse.

6.3.2.1Asapracticalmanualprocedureforsurfaceprepa-

ration,placeasheetofthepaperonaflatsurface,moistenit

withkerosineorwashsolvent,andrubthestripagainstthe

paperwitharotarymotion,protectingthestripfromcontact

withthefingerswithanashlessfiatively,the

surfaceofthestripcanbepreparedbyuseofmotor-driven

machinesusingappropriategradesofdrypaperorcloth.

6.3.3FinalPreparation—Removeastripfromthewash

gitinthefingersprotectedwithashlessfilter

paper,polishfirsttheendsandthenthesideswiththe105-µm

(150-mesh)siliconcarbidegrainspickedupfromacleanglass

platewithapadofcotton(cottonwool)moistenedwithadrop

gorouslywithfreshpadsofcotton

(cottonwool)andsubsequentlyhandleonlywithstainlesssteel

forceps;donottouchwiththefinaviseand

polishthemainsurfaceswithsilicon-carbidegrainsonabsor-

he

directionofthelongaxisofthestrip,carryingthestroke

beyondtheendofthestripbeforereversingthedirection.

Cleanallmetaldustfromthestripbyrubbingvigorouslywith

cleanpadsofabsorbentcottonuntilafreshpadremains

estripisclean,immediatelyimmerseitin

thepreparedsample.

6.3.3.1Itisimportanttopolishthewholesurfaceofthestrip

dgesshow

wear(surfaceelliptical)theywilllikelyshowmorecorrosion

ofavise(seeAppendix)willfacilitate

uniformpolishing.

6.3.3.2Itisimportanttofollowtheorderofpreparation

withthecorrectlysizedsiliconcarbidematerialasdescribedin

finalpreparationiswith105-µmsilicon

alargergrainsizethanthe65micron

sonforthis

useoflargersiliconcarbidegrainsinthefinalpreparationisto

produceasperities(controlledroughness)onthesurfaceofthe