Upda t er e s ul t s0 fMCPVTasat e s tme t ho df ♭ rS t ud yi ng t hede e o mpo S i t i o no fS e l f ‑ r e a c t i vemat e r i a l s

Ar ti Gl O l 川‖ ‖ 州l ‖= 川I l l

Upda t er e s ul t s0 fMCPVTasat e s tme t ho df ♭ rS t ud yi ng t hede e o mpo S i t i o no fS e l f ‑ r e a c t i vemat e r i a l s

Xi nr uiLi l , Dabi nLi u ● ● . Yu8 akul wAt a ● ,Hi r os hiKo s e k i ● ,Ke n j iMaS ug 1, ● ● ● ●

8mdFumi oSamuki … ●

I no r de rt oe val uat et her el i abi l i t yo fm i nic l o s e dpr e s s ur eVe S S e lt e s t ( MCPVT) , ar o undr o bi n pr ogr amamongNRI FD,NKKRandKayat e c hCo.Lt d.wa白c onduc t e di nJapan,u8 1 ngt hr e e t ypi c alo r gani cp er o x i de 8 , St andar dt es tc ondi t i onsWa叩 r O p OS e dAnd( dP/ dt ) . M Wasadapt edf o r t he 8 et e 卓 t s . Ther e s ul t si mpl yt h8日hes amede s i p o ft e s tde v ic eyi e l ds8g o o dr epe at abi l i t yf o r t hr e emat e r i 81 8 .

1 . l ntr odu￠ti on

l nt heManual o f Tb 8 t SandCr it er iao ft heU ni t e d Nat i or L 8( UN) Re c ommendat i o nsont heT hns po r t orDange r ousGo o ds ,8 0C al l e dOr ang eBo ok,t es t 8 e r i e8Ec ompr 1 8 e Sl abo r at or yt e 8 t 8 ,S uc hASt he Koene nt es t .t heDut c hpr e8 8 ur eVe 8 8 e lt e 8 tand t heUSA pr eSSur eVeB8 elt e8t ,andc ri t eri a c onc e r nl ngt heB e n8 i t i ve ne8 80 f8 ub8 t anC e 8t Ot he e We c to fi nt en8 ehe at i ngunde rde f i ne dc o nf i neme nt l 1 】 .cur r e nt l yamongt he s emet ho ds ,t her e l at i ve de gr e eo fB e n8 i t i vi t yo f88 ubO t anC C t Obehe at e di n apr e8 8 ur eVes s eli 8eXpr e8 8 edbyt hel i m i t i ng di ame t e rO ft hebur s t i ngdi s cWhi c hi 8br o k enwhe r L i tc annotendur et hevi ol enc eorde c ompos i t i on.

Thee E r e c tofhe at i ngunde rc on6meme nto fo r g ar L i c pe r oxi dec anber oug h l yder l nedbyt hec r it er ia

̀

Vi o l e n r

Me di um " , " Lo w"andd No " , bas e do nt he S t at eO fbur s t i ngdi s cbe i ngbr o ken.

Howevert her ear eS ever aldi 8 advant ageBi n us i ngt hes et e s tdevi c es .Fi r s t l yt het e S t 8Al l ow o nl yr el at i v ec ompar iS On80 fhaZ Z L r d8qual i t at i v e l y , butt he ydonotpr ovi dequant i t at i vee v al uat i on.

Se c o ndl yr epr oduc i bi l i t yo ft e s tr eS ul t 8i 8no tg o od.

Forexampl e,undert he8 8meC Ondi t i on,t hedi s c ma yb ebr okeni n8 0meC a S e8butno ti not he rc a8 e 8 ,

Re c e i v e d: Ma y l 7 , 2 0 0 2 Ac c e p t e d: Jul y2 . 2 0 0 2

' NRI FD( Nat i o na lRe s e a r c hl nB t i t u t eo f Fi r eand Di 8 88 t e r ) , J8p8 n( e ･ mA i ll i @f r i . g o . j p)

● ● sc ho o l o fChe m ic alEng ine e r ing , Na n j i ngUni v e r ･ 8 i t yo r Sc i e nc ea ndTe c hno l o g y , Chi na

MNKKK( Ni pp onh i j iKe nt e iKy o ka i ) , J叩a n ' ' ' ' KA ya t e C hCo. I . t

. , Ja pan

s ot ode t e r mi neonedi ame t erO ft hedi s cne edsat l e as tr I Vet i mesofr un.Meanwhi l et her anki ng r e s ul t sf ort hes ame8 ubB t anC e 8O f t endi f f erf r om t h r e eki ndso fS t anda r dt e 8 t 8 .Thi r dl yal lt e 8 t 8Ar e l ab or io us . Tbde f i neone8 ub8 t an C e . a8 e r ie 8 0rt r i81 8 w

it hdi f f e r entr e s ear c hi nS t i t ut e8ar er e qui r ed.

Four t hl yduet oanon‑ uni f or m he at i ng,whe nAn o ns e tt e mpe r at ur eOfde c o mpoB i t i o nl i e 8C l o s et Oa boi l i ngpoi nt ,t he8 Ampl ei nt het 88tVe88 el o c c a8 i onal l ye vapo r at e8andc onde n8 e BOnaC o ol e r partOft heveB8elagai n,l eadi ng t o t he de t e r m i nat i ono ft hehal ; ar °unc e r t ai nl 2, 3 】 .The f i f t hi st hatt he s et e B t Bne e dmor et hanhundr e ds g r amor de rs ampl e.whi c hi Bdi f r I C ul tt of ul r l l li n mos tl abo r at or yduet oS pe C i 81S pa c er e qul r ement and8 8f e t yc ons i de r at i on.

I twa島hopedt hati nt hes mal l ･ s c al ec l os ed pr es s ur eve s s e lt e8 t 8w it hel e c t r i c alhe at i ngand pr es s ur eandt emper at ur ehi s t or yr e c or dsC Oul d S ho wt hatt he ywoul dg i vequant i t at i ve,r e l i abl e andr e pr o duc i bl ee s t i mat e s0 ft het he r mal e x pl o s i on e L r e c t 80 rS e l f ‑ r e a c t i v emat e r ial o ror g ani cp e r o xi de.

I nJapan.ami nic l o8 Cdpr e8 8ur eVe8 8 elt es t ( MCPVT)wasde ve l o pe dwhi c hw88bas e donAdo l f Kuehner' 8mi ni ･ aut ocl aVe.The maxi mum pr e8 8 ur er i s er at eme A8 ur emC ntc ou ldbeus e daS as c r e enf o rs omec l a8 8 i f i c at i ont e 8 t 8 .

TheS er e 8 ul t 8O bt ai nedf r om t hec o l l abor at i on wi t ht her e c o gni t i o nb yEur o pe anr es e ar c hgr oup8 t oi nves t i gat et hem i ni ‑ auL o c l aVe88agener al 8Cr eenf orexpl osi vepr opert i e 8 ,i ncl udi ng det onat i onpr o pe r t i es( 4 】 ,enc our ag edaut ho r s t O

Ka y a k uGa k k a i s h i .Vo 1 . 6 3 .No . 6 .2 0 0 2 ‑36/ ‑‑

i nt r o duc eonehar moni z e dpr e s s ur eV e s s elt e s ti nt o t heUNManualorTe 8 t SandCr i t e r i a.Sor apt he devel opmentofaharmoni z edPVT h88been i nc l ude di nt heUNwo r ki ngpr o g r amt hr e epe r i ods asf ol l ows:( ) )f r om 1 997t o1 998Ahar moni z ed UNPVTwasde ve l ope d;( 2 )f r om 1 99 9t o2 0 00 ,t e s t pr o c e dur e s , c o ndi t i onsandc r i t e r i Af ort heMCPVT we r edef i ne d,andMCPVT r oundr obi nwoul dhe c onduc t ed,wher eMCPVT wL l Si nc l udedaSa S c r eeni ngt e8 tandpo8 8 i bl er epl ac ementOrt e s t s e r i e sEbyMCPVTwasS t udi e d;( 3 )f r om2 0 01t o 20 04.MCPVTr oundr obi nt es tWi l lbec ont i nued f o ras c r e eni ngt es t .B88 e donmanyf undament al wor ks【 2 , 3 1 , r oundr o bi nt e 8 t 8Wer er t r 8 t l yi ni t i at e d i nJapanw it ht hr e eor g F l ni cpe r o xi de si nor dert o o bt ai nt hat( 1 )Repr oduc i bi l i t yofMCPVTunder t hes amec ondi t i ons ;( 2 )Val uabl ebenc hmar kf or f ur t herdes i gni mpr o vementandval i dat i on;( 3 ) Ext e ns i v eut i l i z at i o no rt hi 8appar at usi nr unawa y haz ar de val uat i onf oruns t abl e8 ubS t anC e SL 5 1 . 2.R oun d‑r obi n ex peri ments

Cl o8 e dves s elmeas ur eme nt 8Wer emadeus l ng aJapane 8 emO di r L e dt ypeMCPVTv e8 8 e lwhi c hi 8 i l l us t r at eddi agr ammat i c al l yi nFi g.L .MCPVT

Fi g.IMCPVTve s s el i saki ndoft hel ar g

er8 C f I ) eDTAS y如em Whi c h al l owst hemeas

ur ementOrpr eS S ur eA8Wel las t empe r at ur e.Ther e

F I r et hr eehol est hr ought he l i do ft heve 8 8 e l , one

f o raS t r ai nt ypeS e nS O rw it ha

v i br at i o nf r e quenc yorlMHzt hr oughAC api l l ar y t ubeor3 0mml en

gt ht ome nS ur epr e s s ur e.S e c ond oner oraK･ t ypet he

rmoc oupl et omeasur e t empe r at ur eandt hi r donef orA

r upt ur edi s c( Ni l Moal l o y .ac L i v f I L i onpr e 8 8 ur ei

83 5MPaE l k45 0 ℃) f orvent i ng.Toavoi dc l l t nJ

yz i I ngef f ectont he de c ompo s i t i onort he印mp] e,

f lgl as st ubewa sus e d aS8S ampl ec ont f t i ne ri n

E S i det heS t e elve 8 8 e land t het he r mo c oupl ewL t 8Pr o t

e c t e di naFl f I S SS he at h.

TheE L ut O C I F L Vehf l daT r

e ev ol umeor6. 0×J

6m ･ 1 . TheaS B embl e dve 8 S e lwi

t h細mpl eands ens or sf or t empe r at ur eandpr e 8 B ur emef

I B ur ementWasput i nanel e c t r i c f L thef l t i ngr ur n爪C e

Whos ehe at i ng c ondi t i onc oul dbec o nt r o l l e

db yt ldi g i t alpr o g r am.

Di g i t aldAt 爪Wi t ht heS

ampl

ngr at eor O. 2kf l zwer e o bt ai ne dandt hemaxi

mum r at eorpr es E S ur er i s e , ( dP/ dt ) m . . .wF I 8C 81 c ul aL e dP r omt wopoi r

l t SS mo ot h ort her l r 8 tde r i vat i veort hepr e 8 8 ur e･ t

i mec ur ve.

Thr eeor 印ni cper oxi de spr ovi de d

byKaynku Akz oCo.Lt d.S hown

i nTabl eJ .wer ec hos enaS s ampl es .Fol l owi ngX.L

i uandK,Ha8 e gaWt LL 5 , 6 】 , t e s tc ondi t i o nsWe r eR el e c t e

daShe ] o w:

Ve He . q at s elvol i ng ume: 6. 0

巾ml r at e: 9･ 1 0 ℃/ mi n SamPl emas s : l ( ±0. ) )拷

MeaSur l ngi t em B : pr e 8 8 ur eandt empe r at ur e DF L t aS ampl i ngr a

t e:0. 2KHz Thr e er e s e ar c hg r o upspar t i c i p at

e di r L t her ound‑

r o bi nt e 8 t 8 , t hati 8 , t heNat i onA

l Re 8 e f l r C hI ns t i t ut e orFi r eandDi s as t er( NRl F D ) . To

k yo.Ni pponXAi j i Kent aiKy okai( NKKK) . Vokohama.

andKayat e c h Co.Lt d. . Yamaguc hipr e f e c t ur e.

3

Res ul t san d di s cussi on r l bmf l keS ur eOrnOI enk叩e

.t heMCPVTmus t bec l o s e dw iL haVe r y8 t r Ongt or q

ueandal lt hr e ads mus tbel ubr ic at e dve r ywel t .t

nFi g. 2 ,i ti ndi c at e s t hatr e 8 ul t 80rme n8 ur ement 80rVapOrPr e 8 8 1 1

r eOf wat erdur i ngbei ngheat edE L r eV er yC l os

eval ues w

it ht hos ei nt her ef er enc el 7 ) .Thev e8

8 elhast O beheat edunt . i lat . ) e as t25 0 ℃. J t

meansMCPVT

gl V e Sg o o ddat aWheni ti sdop e dqui t eweuandno

Ta bl e1Sampl e sus e di nt het es t

Co de Sampl ename st ab e Pur i t y BPB t ‑ But ylpe r ox ybenz oat e lqu

d 99. 9%

DBTO ² , 5 ‑ Di ‑ met hyl ² , 5 ‑ di ‑ ( i ‑ but ylpe r o x y)hexane l i

qud 85. 5%

BPO Be nz o ylpe r o xi

de s o l i d 74. 3%

Sampl e su陀dher ewer epr ov i dedbyK ay aku AkzoCo.Ltd

. 4 3

2 ‑ ( d C

言 d O L ⁿ S S 巴 ●

^{‑ E x p e r i me n t}

ー Re f e r e r I C eV a l L J e S

O

●

㌔

=

== ノ

5 0 1 0 0 1 5 0 2 0 0

Te mp e r a t u r e( ℃) 2 5 0

Fi g. oo tE>

2Vapo Btemperature l71 rpr e 8 8 ur eOrW8t erVe r B u

2 0

王 )

d Tern pe ra tU re (.C) 仙 20 00 80 印 仰

2 2 2 1 ‑

■t

Tim o(S) Fig.3(a)Pre 8 8 ur eandt emp erat urebehavio rs or BPBf ort hr eer

unsi nMCPVT

□: Pr e8 8 ur e ●:Tempe r at ur e

(

J

t

d

M )

P J d

一

S ○

n d s

Ti me ( S )

Fi g . 3( b ) R at e s0 fpr e 8 8 ur er is eo fBPBf ort

hr e e r un8

Ka y a k uGa k bi s h i .Vo l . 6 3 .No ･ 6 ,2002 i mpl yt hatr e pe at 8bi l i t yoft e s tr e B ul t

8Obt ai ne dby t hes ameope r at ori 8Ac c

ept abl e.The8 8mpl eat f i r s ti she at e dby

t her at eOf 1 0 ℃/m i nunder8 m mp mode.Att heonset

t emper at ur eOf decomposi t i onoft he88mpl e.p

r e88ur eand t empe r at ur eg OupS t e e pl ya8g 8 8a

ndhe atr e l eas e.

Her eons ett emper at ur e( Tn )i 8def i

neda8t he t empe r at ur eatWhi c hdP/ dti 8t h

emaxi mumand T,i St hehi g he s tt empe r at ur eatw

hi c ht her e a c t i on canpr oc eed.Themaj orpr oduc

t sOfBPBar e t ol ue ne, be nz ene ,pr opanO ne,me t han

eandc ar bo n di oxi deL 81 .Theexper i ment alr es e

ar c hL 9Jh88 r e ve al e dt hataVe r yB hor t ･ t er mwaveO f

g a8 e 80f bot h" dr y "And" wet ' 'pr oduc t Sw it h

i nt ens eheat r e l e as ear i8 e 8f r omt hev e 8 8 e li nt

oat mo s phe r e , and vent sdi r ec t l yt hr ought heduc t

t opr e8 8ur e t r anB duc er8 en8 0r ,Whi c hbui l dupA

qui t ehi gh o ver pr e 8 8 ur eS har pl yatt hepos i t i onor

pr e 8 8 ur e t r ans duc e r .Sot he r eappe ar saS har p

pe akont he pr e s s ur eC ur veatWhi c hpr e 8 8 ur er i 8 e

At t ai nBt he maxi mumval ue.Thent hepr e 8 8 ur ede c r e

aB eSt O ac on8 t 8mtl o we rl e v e l . The r ear et wor

e a8 0 n8 . The f i r s ti St hatt hef or me rhi g h･ B Pe e dg88

nowl e ads t oAPr e8 8 ur ei mbal anc ebe t weent hev

eB S eland t heduc t .t hati 8 .t hepr es s ur ei nveS S

eli 8l o wer t hant hati nduc t .Thei mbal anc ei nt

ur nc aus es ani nv er s eg asno wf r omt hedu

c ti nt ot hev es s el S oonaf t ert hepr e s s ur e

at t ai nst hehi g hes t .The 8eCOndr eason

i St hatduet ot hebi ggest t emper at ur edi f f er enceb

et weeni nsi deand S ur r oundi ngwhent he88mpl edecom

po8 e8 v

io l ent l y .heatg ene r at e df r omt her e a

c t i oni Bl os t t ot heambi entqui c kl yandASar

e s ul tt e mp e r at ur e oft heS ampl et endst OgOdown

agai nt ot he ambi ent .Es pe c i al l yt he" wet "f r aC t i o

n8i nt he pr oduc t s ,8 uC haSt Ol ueneandben乙 e ne,C

o ndens e ag a l n,Whi c hl e adt hepr e 8 6 ur et Ode c

r e as eunt i la

ne wbal anc ei 8e s t abl i s he d. The8 i m i1 8rp

Tabl e2Repe at abi l i t yi nMCPVT

Sampl e

MPa) PR A T ( dP/ ( MPa d t l J n S ) … ( ℃) T o あ Ko nen Du上 t : h USA PVT P∀T

BPB 1 0. 1 0. 3

3★★ 0. 6★ 1 221 83. 5 .

8●★ 5. 6★ 1 33. 8 232. 3 Vi de

nt Vi o l e nt Medi um DBTO 1 2. 7

0. 3★ 2 01

4 士1 8. 5★ 1 72. 8

299. 2 Me di um Vi ol ent ★★★

BPO 8. 8. 1 士0. 6★★ 7★ 3 98. 333. 2

2★★ 21 . 7★ 1 01 .

6 1 93. 2 Ⅵo l e nt Me di um Vi ol ent ★

*Ther ang es

me ant heval ueo fs t andar dde vi at i on.

'

'DAt aWe r eO bt a inedbydi f f e r e ntope r at o r s .( Sampl e sWe

r ef r o mNi ppo nO i l& Fat 8Co.Lt d. 日5 】

***Di B Cr upt ur e dat

o r i f i c edi amet ero f9. 0J nm i nUSA･ PVT

****Di s cr upt ur Cdato r

if i c edi TAbl amet e3Repr ero f1 8. oduc 0mm i i bi l i nUSAI t yo fr o PVT

undr o bi nt e s t

NRⅠ FD NKKK Ka y8t e C h

Sampl e P, R . , ( dP/ dt ) m a t P… ( dP/ dt )

P

( dP/

dt ) … ( 班pa) ( 班pa / ら ) ( MPa) ( MPa / S )

( 班pa) ( Mph/ S ) BPB 1 0. 3 1 8

3. 5 ③ ( +1 1 0 . % 4 1 07. 3③ 8. 7 1 74. 0@

) ( ‑ 41 %) ( ‑ 1 5 %) ( ‑ 5 %) DBTO 1 2. 7 201 . 4 ② 8. 8 11 8. 6 ② 1 2 . 4 1 8

7. 5 @ ( ‑ 3 0 %) ( ‑ 41 %) ( ‑ 2 %)

( ‑ 6 %) BPO 8. 1 398. 2 ① ( 5. 2 1 41 . 3 ( 》 8. 3 357. 1 ①

‑ 35. 8%) ( ‑ 6 4 %) ( +2%) ( ‑ 1 0%) Dat aWe r eO bt a ine dbyea c ho pe r at o ratl e a

s tt hr e er uns . Theper c ent ag e8i npar e nt he s e sme ant hemean

de vi at i o nf r omdet ao fNRI FD

①〜 ③ ar er anki ng8f o

rv io l enc eo fdec ompo s i t i o n.

di ox T i del 8 】 .

abl e2c o r npa r e St hedat ao bt a ine df r o mNRI FD us

i ng8 8mpl e8f r om KayakuAkz oCo.Lt d.by aut ho r sand

Ni ppo nOi l& Fat 8Co.Lt d.b yot he r o pe r 8t Or 8 . 1 ts

ho wsVe r yC l os er e s ul t spr o v ide dt hat t hev e8 8 e li 8t he8 8me, r e ga r dl e s sO ft he8 uppl i er B ofS ampl es .I nTabl e2,t hedat af rOmMCPVTar e al Re s c oc omme ompar edwi t ht estr es ul t si nt heUN

ndat i onus i ngt heEo ne nTe s t , t heDut c h t e s tand

t heUSAt e s t l 1 ] .I ti Bnot edt hAtt he S e t hr e eme t ho

dsOn lypr o v ider oug h c l a8 8 i f i c At i on , andevent od0 6 0 , r e s ul t so fr anki ngt hr e eS

Ampl e S by t hr eet estmet hodsShown i n t heUN r

ec ommendat i onsar equi t ei nc ons i s t ent .For e xampl e

,BPBde c o mpos i t i oni sc onc l ude dt obe vi o l e nt

i nt heEone nAndt heDut c ht e 8 t S ,Whi l ei t i 8me d

i umi nt heUSAt e 8 LDBTOi sc onc l ude dt o bemedi u

m i nt heXonent e s tbutvi ol ent , i nt he USAt es t .

BPOi 8V i o l e nti nt heKo nenandi nt he USAt es t sb

utme d i umi nt heDut c ht e s t .I tc anbe S e e nt

hatt her ei SnOe v i de ntc o r r e l at i onbe t we en

ei t hert wooft hem ata ll .Howe ve r ,i nMCPVT , when( dPI dt )… i sadopt edaSapar amet e r ,t he decomposi t i on ranki ng i 8 COnCl uded aB BP

O>DBTO>BPB.Thei r( dP/ dt ) m n xde c r e aS e 8i n t he

S ameOr de rast hos ef r om or i f i c edi amet er i nc r

eas ef o rdi S Cr upt ur ei nt heUSAP∀Tt es t . Fo ri ns t ance,BPO,DBTOAndBPBdecompo8i t i

onB c aus edi s cr upt u r eato r ir l C edi Ane t e r 80 f

1 8. 0mm , 9. 0mm and8. To 0mm,r e s pe c t i vel y .

l ookt hr ought her epr oduc i bi l i t y ,r e s ul t s obt ai r L ed

bydi f f er entoper at orsi ndi f f er ent l abo r at o r i

e s . Tabl t !3l i s t st hedat af r omt heo t he r t wo

par t i c i pant s ,NKKKandKa yat e C hCo.Lt d. , and(

dP/ dt ) … ,val ue sO bt ai ne dbyEAyAt ec hCo.

Lt d.ar

ei na c c o r da nc ewe l lw it ht hos eofNRI FD , t ho ug h

NKE K dat ai 8S t i l lno t8 0g oo d.I tS ho ul d beno t i c e d

t

hato no nehand, whe nMCPVTi Sus e d f o rc l as s i f yi n

gt hee xt e nto fhaz ar dsi nl aws0 ri n r e g ul at i o ns

,t hes i z eo fve s 8 e l ,t hema8 80 fs ampl e andhe

at i ngr at eS ho ul dbei dent i c alanddef i ned c l e ar

l y .Ont heot he rh nd.meas ur ementofP, M

ma ys t i l lhav eB O m

l abo r at o r yt ol abo r at o r y , anT e c t e db yva r io usf a c t o r s , s uc hast hes i 2 : eO fve s s e l , t hemas so fs ampl e,t he r e s o l ut i o no fampl i f i e r , he atr at eande v e nt het ype ofr ec o r der .Compar edt oP. n a t ,( dP/ dt ) m a ti smor e i mpo r t antpar ame t e rt ode t e r m inet her anki ngf o r s ubs t anc es ' de c ompo s i t i o n.I nt abl e3 ,Pm A tO fBPO i sI . hel owes tamongt het hr e es ampl es ,whi l ei ti s kno wnt hati t sde c o mpo s i t i o ns ho ul dbemuc hmo r e vi g or oust hanBPBandDBTO,be c aus eoft hei r c har ac t . e r i s t i c sofc hemi c als t r uc t ur e.Wi t ht he dat a O f ( dP/ dt )

a tf r omt het hr e el abor at o r i e s ,i ti 8 mor epr ef er abl et ogl Vego odagr e ementi nt he r anki ngo fBPB, DBTOandBPO. The r e f o r e ,i f( dP/

dt ) m a tC anbeado pt e dasac r it e r i o n,MCPVThasa g r e a tpo t e nt i alt obeAne wquant i t at i veandr e l i abl e t es tmet hod,S ubs t i t ut i ngf ort hepr es entUN s t anda r dt e s t s .

Fur t he r mor e,f orext ens i veut i l i z at i on,Ot he r f ac t si nvo l vesi nade vi c edes i gnar e: ( 1 ) agl as s ‑ s hez l t hedt her moc oupl e,whi c hi ns er t si nt ot he s ampl e,C andi r e c t l yme as ur et het e mpe r at ur eof s ampl e.I ti 8f oundt hatt her ei sdi ve r genc ef o r t empe r at ur esamongS ampl eandf ur nac eand t emper at ur edi 白 t r ibut i oni naves s e l .See i ngal l c ur vesi nr e c ente xper i ment sandc al c ul at i ngt he he at i ngr at e s , t hee xi s t i ngc o ndi t i o nc ang uar ant e e t hatS ampl ei she at edbyt her at eof9‑ 1 0℃/ m i n.

( 2 )Al um i nums pac e rands i l i c o no i ls ho u ldf i l lt he c api l l a r yt ubet opr e ve ntc o r r o s i on.ButB Of arwe di dnotus eal umi num s pac e randS i l i c o noi lf or s ubs t i t . ut i o no f t e ns i nc ec o r r o s i o ndo e sno ti nnue nc e o nt heI , e s tr es u lts omuc h.

4.Con cl usi ons

Theround robi n t estdat 8 0rMCPVT demons t r at edg o o dr e pe at a bi l i t yf ort hr e es ampl es And good reproduci bi l i t y amongdi f f erent l abo r at o r i espr o v i dedwhe nt heS amet y peVe S S e l s wer eus edi nt hes et es t s .I ti sS ugges t edt hati f ( dP/ d

a tC anbeadopt e dasac r it e r i on, MCPVTi 8 us e df o rc l as s i f yi ngt heext e ntofhaz a r dsi nl aW8 0 ri nr e g ul at i ons , butonl ywhe nt hes i z eo fves s e l , t

hema 8 80fs ampl e ,he at i ngr at eandot he rde t a il s S ho ul dbei de nt i c alandde f i nedc l e ar l y .Thedat a

i nt hi spaperS uppo r tt hee xt ens i veut i l i E at i ono f MCPVT f orc l as Si f i cat . i onofmat er i al swi t h uns t abl ede c ompo 8 i t i o n.Fu rt he r mo r e,t he s edat a a r ea bl et os e r veaBbe nc hmar kdat af orwo r l dwi de r oundr o bi nt e s t s .

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