MIL-STD-202-215A-2020美國(guó)美軍標(biāo)準(zhǔn)

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INCH-POUNDMIL-STD-202-215A

15December2020

SUPERSEDINGMIL-STD-202-215w/CHANGE1

4May2018

DEPARTMENTOFDEFENSETESTMETHODSTANDARD

METHOD215,RESISTANCETOSOLVENTS

AMSCN/A FSC59GP

MIL-STD-202-215A

FOREWORD

ThisstandardisapprovedforusebyallDepartmentsandAgenciesoftheDepartmentofDefense.

Thisentirestandardhasbeenrevised.Thisrevisionhasresultedinmanychangestotheformat,butthemostsignificantoneisthesplittingthedocumentintotestmethods.SeeMIL-STD-202forthechangesummary.

Comments,suggestions,orquestionsonthisdocumentshouldbeemailedto

std202@

oraddressedto:Commander,DefenseLogisticsAgency,DLALandandMaritime,ATTN:VAT,P.O.Box3990,Columbus,OH43218–3990.Sincecontactinformationcanchange,youmaywanttoverifythecurrencyofthisaddressinformationusingtheASSISTOnlinedatabaseat

.

ii

SUMMARYOFREVISIONAMODIFICATIONS

Modifiedparagraph1.1.b,added“terminations”.

Modifiedparagraph4.2.1correctedreferenceparagraphs.

Modifiedparagraph4.2.2correctedreferenceparagraph.

Modifiedparagraph4.2.3correctedreferenceparagraph.

Modifiedparagraph4.2.4correctedreferenceparagraph.

iii

CONTENTS

PARAGRAPH PAGE

FOREWORD…………. ii

SCOPE 1

1.1 Purpose………….……..…………. 1

1.2 Formulationofsolvents….…….……..…………. 1

1.3 Checksforconflicts………………..……………. 1

APPLICABLEDOCUMENTS 1

2.1 Specifications,standards,andhandbooks…… 1

DEFINITIONS 1

GENERALREQUIREMENTS 2

4.1 Materials……………….…….…….……….2

4.1.1 Solventsolutions 2

Solventsolutions,safetyaspects……..……….24.1.2 Vessel….……….…….………….………….………...………….24.1.3 Brush..…………..…….………………..………….24.2. Procedure…………….………..….….…………..34.2.1 Groups………..……..…………….3

Optionalexposureprocedureforthethirdgroup……………..4

Immersiontestforcomponentswithmarkingprotected

byasleevematerial…………..……..……….…. 4

Openconstructionpartsandpartsnotintended

forPCBmounting………………... 4

DETAILEDREQUIREMENTS 6

5.1 Summary…………..…..…………. 6

Examinationandmeasurements……………. 6

Markingresistancetosolvents…….……………..……………. 6

Componentprotectivecoating,encapsulationmaterial

andsleevematerialresistance….……………..………………. 6

NOTES 6

6.1 Supersessiondata………………. 6

TABLES PAGE

Summarytableforresistancetosolvents…..……….…… 5

iv

METHOD215RESISTANCETOSOLVENTS

SCOPE

1.1Purpose.Thepurposeofthistestisasfollows:

Toverifythatmarkingsorcolorcodingwillnotbecomeillegibleordiscoloredontheparts(includingprintedwiringboards)whensubjectedtosolventsandprocessesnormallyusedtocleansolderflux,fingerprints,andothercontaminantsfromprinted-wiringandterminal-boardassemblies,etc.

Toverifythatcomponentprotectivecoating,encapsulationmaterialandsleevematerialresistancearenotdegradedtothepointwhereelectricalormechanicalintegrityisdisturbedwhensubjectedtosolventsandprocessesnormallyusedtocleansolderflux,fingerprints,andothercontaminantsfromprintedwiringandterminalboardassemblies,etc.

Formulationofsolvents.Theformulationofsolventsisconsideredtypicalandrepresentativeofthesolventsusedinprintedwiringassemblyprocessingofelectroniccomponents.Processingconditionsarerepresentativeofprocessesusedforprintedwiringassembly.

Checksforconflicts.Whenthistestisreferenced,careshouldbeexercisedtoassurethatconflictingrequirements,asfarasthepropertiesofthespecifiedfinishesandmarkingsareconcerned,arenotinvoked.

APPLICABLEDOCUMENTS

2.1Specifications,standards,andhandbooks.Thefollowingspecifications,standards,andhandbooksformapartofthisdocumenttotheextentspecifiedherein.Unlessotherwisespecified,theissuesofthesedocumentsarethosecitedinthesolicitationorcontract.

FEDERALSPECIFICATIONS

TT-I-735

- IsopropylAlcoholDEPARTMENTOFDEFENSESPECIFICATIONS

MIL-PRF-680

- DegreasingSolvent

(Copiesofthesedocumentsareavailableonlineat

)

DEFINITIONS

Thissectionisnotapplicabletothisstandard.

1

GENERALREQUIREMENTS

Materials

Solventsolutions.Thesolventsolutionsusedinthistestshallconsistofthefollowing(seetableIforsummary).

Amixtureconsistingofthefollowing:

Onepartbyvolumeofisopropylalcohol,AmericanChemicalSociety(ACS)reagentgrade,orisopropylalcoholinaccordancewith

TT-I-735,

gradeAorB,and

Threepartsbyvolumeofmineralspiritsinaccordancewith

MIL-PRF-680,

typeI,orthreepartsbyvolumeofamixtureof80percentbyvolumeofkeroseneand20percentbyvolumeethylbenzene.

Aterpenedefluxerconsistingofaminimumof90percentd-limoneneand10percentsurfactant.1/

Amixtureconsistingofthefollowing:

Forty-twopartsbyvolumewater,1megohm-cmminimumresistivity.

Onepartbyvolumeofpropyleneglycolmonomethylether(glycoletherPM,1-methoxy-2-propanol).

Onepartbyvolumeofmonoethanolamine.2/

Isopropylalcohol,AmericanChemicalSociety(ACS)reagentgrade,orisopropylalcoholinaccordancewith

TT-I-735,

gradeAorB.

Solventsolutions,safetyaspects.Solventsolutionslistedin4.1.1athrough4.1.1dexhibitsomepotentialforhealthandsafetyhazards.Safetyprecautionsaslistedintheappropriatemanufacturersmaterialsafetydatasheetshallbeobserved.

Vessel.Thevesselforsolventimmersionshallbeacontainermadeofnon-reactivematerialandofsufficientsizetopermitcompleteimmersionofthespecimensinthesolventsolutionsspecifiedin4.1.1.

Brush.Thebrushshallbeabrushwithahandlemadeofanonreactivematerial.Thebrushshallhavethreelongrowsofhardbristles,thefreeendsofwhichshallliesubstantiallyinthesameplane.Thebrushshallbeusedexclusivelywithasinglesolventandwhenthereisanyevidenceofsoftening,bending,wear,orlossofbristles,itshallbediscarded.

1/AcommonlyusedterpenedefluxerisBIOACTEC-7R."BIOACT"isaregisteredTrademarkofPetrofermINC;"EC-7andEC-7R"aretrademarksofPetrofermINC.

2/Normalsafetyprecautionforhandlingthissolution(e.g.,sameasthosefordilutedammoniumhydroxide)basedonO.S.H.A.rulesformonoethanolamine.

2

MIL-STD-202-215A

Procedure

Groups.Thespecimenssubjectedtothistestshallbedividedintofourgroupsofapproximatelyequalsize.

Thefirstgroupshallbeexposedtothesolutionspecifiedin4.1.1a.

Thesolutionshallbemaintainedatatemperatureof25C±5C.Thespecimensshallbecompletelyimmersedfor3minutes+0.5,-0minutesinthespecifiedsolutioncontainedinthevesselspecifiedin4.1.2.Immediatelyfollowingimmersion,eachspecimenshallbetestedasfollows:Thebristleportionofthebrush,specifiedin4.1.3,shallbedippedinthesolutionuntilwettedandthespecimenshallbebrushedwithnormalhandpressure(approximately2to3ounceforceappliednormaltothesurface)fortenstrokesontheportionofthespecimenwheremarkinghasbeenapplied.Thebrushstrokeshallbedirectedinaforwarddirectionacrossthesurfaceofthespecimenbeingtested.Immediatelyafterbrushing,theprocedureshallberepeatedtwomoretimes,foratotalofthreeimmersions,followedbybrushing.Aftercompletionofthethirdimmersionandbrushing,thespecimensshallbeair-blowndry.Thespecimensshallbeinspectedinaccordancewith5.2.1and

5.2.2todeterminetheextent,ifany,ofdeteriorationthathasoccurred.

Thesecondgroupshallbeexposedtothesolutionspecifiedin4.1.1b.

Thesolutionshallbemaintainedatatemperatureof25C±5C.Thespecimensshallbecompletelyimmersedfor3minutes+0.5,-0minutesinthespecifiedsolutioncontainedinthevesselspecifiedin4.1.2.Immediatelyfollowingimmersion,eachspecimenshallbetestedasfollows:Thebristleportionofthebrush,specifiedin4.1.3,shallbedippedinthesolutionuntilwettedandthespecimenshallbebrushedwithnormalhandpressure(approximately2to3ounceforceappliednormaltothesurface)fortenstrokesontheportionofthespecimenwheremarkinghasbeenapplied.Thebrushstrokeshallbedirectedinaforwarddirectionacrossthesurfaceofthespecimenbeingtested.Immediatelyafterbrushing,theprocedureshallberepeatedtwomoretimes,foratotalofthreeimmersions,followedbybrushing.Aftercompletionofthethirdimmersionandbrushing,thespecimensshallberinsedinapproximately25Cwaterandallsurfacesair-blowndry.Thespecimensshallbeinspectedinaccordancewith5.2.1and5.2.2todeterminetheextent,ifany,ofdeteriorationthathasoccurred.

Thethirdgroupshallbeexposedtothesolutionspecifiedin4.1.1c.

Thesolutionshallbemaintainedatatemperatureof63Cto70C.Thespecimensshallbecompletelyimmersedfor3minutes+0.5,-0minutesinthespecifiedsolutioncontainedinthevesselspecifiedin4.1.2.Immediatelyfollowingimmersion,eachspecimenshallbetestedasfollows:Thebristleportionofthebrush,specifiedin4.1.3,shallbedippedinthesolutionuntilwettedandthespecimenshallbebrushedwithnormalhandpressure(approximately2to3ounceforceappliednormaltothesurface)fortenstrokesontheportionofthespecimenwheremarkinghasbeenapplied.Thebrushstrokeshallbedirectedinaforwarddirectionacrossthesurfaceofthespecimenbeingtested.Immediatelyafterbrushing,theprocedureshallberepeatedtwomoretimes,foratotalofthreeimmersions,followedbybrushing.Aftercompletionofthethirdimmersionandbrushing,thespecimensshallberinsedinapproximately25Cwaterandallsurfacesair-blowndry.Thespecimensshallbeinspectedinaccordancewith5.2.1and5.2.2todeterminetheextent,ifany,ofdeteriorationthathasoccurred.

3

MIL-STD-202-215A

Thefourthgroupshallbeexposedtothesolutionspecifiedin4.1.1d.

Thesolutionshallbemaintainedatatemperatureof25C±5C.Thespecimensshallbecompletelyimmersedfor3minutes+0.5,-0minutesinthespecifiedsolutioncontainedinthevesselspecifiedin4.1.2.Immediatelyfollowingimmersion,eachspecimenshallbetestedasfollows:Thebristleportionofthebrush,specifiedin4.1.3,shallbedippedinthesolutionuntilwettedandthespecimenshallbebrushedwithnormalhandpressure(approximately2to3ounceforceappliednormaltothesurface)fortenstrokesontheportionofthespecimenwheremarkinghasbeenapplied.Thebrushstrokeshallbedirectedinaforwarddirectionacrossthesurfaceofthespecimenbeingtested.Immediatelyafterbrushing,theprocedureshallberepeatedtwomoretimes,foratotalofthreeimmersions,followedbybrushing.Aftercompletionofthethirdimmersionandbrushing,thespecimensshallbeair-blowndry.Thespecimensshallbeinspectedinaccordancewith5.2.1and

5.2.2todeterminetheextent,ifany,ofdeteriorationthathasoccurred.

Optionalexposureprocedureforthethirdgroup.Thetestspecimensshallbelocatedonatestsurfaceofknownareawhichislocated6±1inches(15±2.5centimeters)belowaspraynozzlewhichdischarges.16±.005gpm(0.62±0.02litersperminute)ofsolutionperin2(6.5squarecentimeters)ofsurfaceareaatapressureof20±5lbs/in2(138±34kilopascal).Thesolventshallbeheldatatemperaturerangeof63Cto70C.Thespecimensshallbesubjectedtothissprayforaperiodof10minutes.Aftercompletionofthesprayexposure,thespecimensshallbethoroughlyrinsedinwaterandallsurfacesair-blowndryandinspectedinaccordancewith5.2.1and5.2.2todeterminetheextent,ifany,ofdeteriorationthathasoccurred.Ifthisoptionalprocedureisspecified,brushingofthesamplesinthethirdgroupisnotrequired.Ifaconflictarisesfromtheuseofthesprayoption,thebrushmethodof4.2.1dshallbeusedastherefereeprocedure.Themeasurementsshowninparenthesesarenotexactequivalentsandareshownforconvenienceonly.

Immersiontestforcomponentswithmarkingprotectedbyasleevematerial.Componentswithaprotectivesleeveshallbedividedintofourgroupsasspecifiedin4.2.1,andeachgroupshallbesubjectedtotestingusingthesolutiondefinedforthatgroup.Eachsolutionshallbemaintainedatatemperatureof25C±5C,exceptthesolutionin4.1.1cshallbemaintainedatatemperatureof63Cto70C.Thespecimensshallbecompletelyimmersedfor3minutes+.5,-0minutesinthespecifiedsolutioncontainedinthevesselspecifiedin4.1.2.Immediatelyfollowingimmersion,eachspecimenshallbetestedasfollows:Thebristleportionofthebrushspecifiedin4.1.3shallbedippedinthesolutionuntilwettedandthespecimenshallbebrushedwithnormalhandpressure(approximately2to3ounceforceappliednormaltothesurface)fortenstrokesonthesleevedirectlyabovetheareaofthemarking.Immediatelyafterbrushing,theprocedureshallberepeatedtwomoretimesforatotalofthreeimmersionsfollowedbybrushing.Thebrushstrokeshallbedirectedinaforwarddirectionacrossthesleeveareaabovethemarking.Aftercompletionofthethirdimmersionandbrushing,thespecimensshallbeair-blowndry.Thespecimensshallbeinspectedinaccordancewith5.2.1and5.2.2todeterminetheextent,ifany,ofdeteriorationthathasoccurred,includingthesleeve.

OpenconstructionpartsandpartsnotintendedforPCBmounting.Partsofopenconstructionwhicharesusceptibletointernaldamagebyimmersioninsolventsandpartsnotintendedformountingonprintedcircuitboards,shallbedividedintofourgroupsasspecifiedin4.2.1,andeachgroupshallbesubjectedtotestingusingthesolutiondefinedforthatgroup.Eachsolutionshallbemaintainedatatemperatureof25C±5C,exceptforthesolutionin4.1.1c,whichshallbemaintainedatatemperaturerangeof63Cto70C,andshallbecontainedinthevesselspecifiedin4.1.2.Eachgroupshallbetestedasfollows:Thebristleportionofthebrushspecifiedin4.1.3shallbeimmersedintherespectivesolutionforeachgroupuntilwetted.Themarkingareaofthespecimentobetestedshallthenbeimmediatelybrushedwithnormalhandpressure(approximately2to3ounceforceappliednormaltothesurface)fortenstrokesontheportionofthespecimenwheremarkinghasbeenapplied(testareanottoexceedone-halfinchsquare).Thebrushstrokeshallbedirectedinaforwarddirectionacrossthemarkedsurface.Thistestshallberepeatedtwiceforatotalofthreetimesforeachspecimen.Thespecimensshallthenbeinspectedinaccordancewith5.2.1and5.2.2todeterminetheextentofdeterioration,ifany.

4

TABLEI.Summarytableforresistancetosolvents.

Solvent1

Solvent2

Solvent3

Solvent4

1part(byvolume)ofisopropylalcohol(ACS)

reagentgradeor

TT-I-735,

gradeAorBand3parts(byvolume)ofmineralspiritsper

MIL-PRF-680,

typeI,

orthreeparts(byvolume)ofamixtureof80%(byvolume)ofkeroseneand20%

(byvolume)ethylbenzene.

Terpenedefluxer

42parts(byvolume)ofwater

1part(byvolume)ofpropyleneglycolmonomethylether

1part(byvolume)ofmonoethanolamine

Isopropylalcohol(ACS)reagentgradeor

TT-I-

735,

gradeAorB..

Immersion3+.5,-0minutes,25C±5C

Immersion3+.5,-0minutes,25C,±5C

Immersion3+.5,-0minutes,63Cto70C

Immersion3+.5,-0minutes,25C±5C

Brush10strokes(wetbristle)2to3oz.

Brush10strokes

(wetbristle)2to3oz.

Brush10strokes(wetbristle)2to3oz.

Brush10strokes(wetbristle)2to3oz.

Immersion3+.5,-0minutes,25C±5C.

Immersion3+.5,-0minutes,25C±5C.

Immersion3+.5,-0minutes,63Cto70C.

Immersion3+.5,-0minutes,25C±5C.

Brush10strokes(wetbristle)2to3oz.

Brush10strokes

(wetbristle)2to3oz.

Brush10strokes(wetbristle)2to3oz.

Brush10strokes(wetbristle)2to3oz.

Immersion3+.5,-0minutes,25C±5C.

Immersion3+.5,-0minutes,25C±5C.

Immersion3+.5,-0minutes,63Cto70C.

Immersion3+.5,-0minutes,25C±5C.

Brush10strokes(wetbristle)2to3oz.

Brush10strokes

(wetbristle)2to3oz.

Brush10strokes(wetbristle)2to3oz.

Brush10strokes(wetbristle)2to3oz.

Rinseinwater

Rinseinwater.

Airblowdry.

Airblowdry

Airblowdry.

Airblowdry.

Inspectat3Xmaximumformarking.

Inspectat10Xmaximumforpartdamage.

Inspectat3Xmaximumformarking.

Inspectat10Xmaximumforpartdamage.

Inspectat3Xmaximumformarking.

Inspectat10Xmaximumforpartdamage.

Inspectat3Xmaximumformarking.

Inspectat10Xmaximumforpartdamage.

5

DETAILEDREQUIREMENTS

Summary.Thefollowingdetailsaretobespecifiedintheindividualspecification:

Thenumberofspecimenstobetested.

Optionalprocedureforthethirdgroupallowed(see4.2.2).

Examinationandmeasurements

Markingresistancetosolvents.Aftersubjectiontothetest,anyspecifiedmarkingswhich