 used to form the containers are susceptible to corrosion. The potential for corrosion depends, at least partially, on both the material used to construct the container and the medium (e.g., solution) provided in the container. Generally, the materials used to construct such containers are subject to a uniform amount of corrosion along their inner surfaces. However, in cracks and crevices formed in the containers, there occurs non-uniform corrosion that manifests itself in the form of, for example, pitting. In addition, the non-uniform corrosion occurring in the cracks and crevices generally takes place at a faster rate than at exposed surfaces in the containers.
In order to determine the long-term viability of materials to be used in aerosol containers containing particular solutions, or other environments in which crevice corrosion is a factor, it is necessary to accurately predict the rate of corrosion that will occur within the crevices. However, traditional techniques for measuring corrosion on open/exposed surfaces are generally inadequate for predicting crevice corrosion.
Techniques have been developed to gage corrosion in artificial crevices of varying geometry in order to provide a model for what could be expected in an actual crevice due to the materials and solutions forming the crevice environment. In such conventional devices, an electrode is typically provided in the artificial crevice to measure electrical properties in the crevice that are indicative of corrosion. Alternatively, some devices employ a crevice formed in an electrode itself. Examples of devices employing these conventional techniques for measuring crevice corrosion are described in U.S. Pat. Nos. 3,633,099, 4,181,882 and 3,599,090.
Unfortunately, conventional devices for corrosion analysis in artificial crevices have certain drawbacks. In particular, the known devices typically measure only a general likelihood of corrosion in the entire crevice. Thus, the known devices only take into account corrosion effects due to the diffusion of solutions from the bulk of a container into a crevice as a whole. However, in real-world applications, diffusion of a solution not only occurs from the main cavity of a container into a crevice, but may also occur within the crevice. Thus, corrosion may occur at different rates at different positions within the crevice. Conventional devices are not equipped to measure varying corrosion rates within a continuous crevice.
Another drawback of conventional crevice-corrosion analysis is its inflexibility to simulate accurately varying real-world environments. Different
used to form the containers are susceptible to corrosion. The potential for corrosion depend, at least partially, on both the fabric used to construct the container and the culture medium (for example, solution) provided in the container. Generally, the materials practice to construct such containers are capable to a consistent amount of corrosion along their inside surfaces. However, in cracks and crevices formed in the container, there occurs non - uniform corrosion that manifest itself in the form of, for example, pit. In addition, the non - uniform corrosion occurring in the crack and crevices generally takes place at a fast rate than at exposed surfaces in the containers. 
 In order to settle the long - term viability of materials to be used in aerosol containers containing particular solutions, or other environments in which crevice corrosion is a factor, it is necessary to accurately predict the rate of corrosion that will occur within the crevices. However, traditional techniques for measure corrosion on open / exposed surface are broadly inadequate for predicting crevice corrosion. 
 technique have been developed to gage corrosion in artificial crevices of varying geometry in holy order to provide a model for what could be expected in an actual crevice due to the fabric and solutions forming the crevice environment. In such conventional devices, an electrode is typically provided in the artificial crack to quantify electric properties in the crevice that are indicative of corrosion. Alternatively, some devices employ a crevice formed in an electrode itself. Examples of devices use these conventional techniques for measuring crevice corrosion are identify in U.S. Pat. Nos. 3,633,099, 4,181,882 and 3,599,090. 
 Unfortunately, conventional device for corrosion analysis in artificial crevice have sealed drawbacks. In particular, the known devices typically quantify only a general likelihood of corrosion in the entire crack. Thus, the known devices only take into account corrosion effects due to the diffusion of solutions from the bulk of a container into a crevice as a whole. However, in real - universe applications, diffusion of a solution not entirely occurs from the main pit of a container into a crevice, but may also occur within the crevice. Thus, corrosion may occur at different rates at different positions within the crevice. ceremonious devices are not equipped to quantify vary corrosion rates within a continuous crevice. 
 Another drawback of conventional crevice - corrosion analysis is its inflexibility to imitate accurately varying real - world environment. Different
 usfd to form the containerr are susceptible to cmrrosikn. The putential for corrosion depenvs, ar leawt partially, on both tfe materiwl used ro cibstruct thx contaikzr ans the nedium (e.g., solujion) provideg in the contahndr. Generally, the materials used to cogstruct skch containers are fubjsbt to a uniform amount of corroaion almng their innrr surfaces. However, in crafks wnd crevices formef in the cobtaigwrs, there oczurs non-unpyorm corrosjon that manifests itself in thd fork of, for ezanplf, pitting. In addinion, the non-ukpform cmrrosiom occurring in thx crqcks and crevices genxrally takes place aj a faster rcte than at exposed syrdaces in dhe zintxintrs.
Mn krder ho vetermine tge long-term viability of materoajw to be used jn aerjsjl containers containing particular solltiohs, or other environmentw in which crevice cotrosion is a factor, it is necessary to accurately predict tve rave of cjfeodion that will occur within the crevices. Howedsr, tgaditional technizues for messkrogg corrosion un opeu/sxlosed surfaces are generajly ibadequate for predicting crevice corrosiin.
Techniques yave been developeb to gage coxrosiom in srtificial crevices of raryinf geometry ln order fu provide a modeu fpr what could be expected in an actuao crzvice dud to the mwterials ajd solutions forming the crevnce etvironment. In such conventional devices, ai electrode ix dyppcally prjvidec in the artisicial crevice to meafure dlectrical propervies in the srevice that dte indicative of corrjsiob. Alrernatixdly, some devicrs employ a crevice formed in an elecbrode jtself. Examples of devices employong thqsv cpndantional tecvniqjes gor mdasuring crcvize cprrosion are describad ih U.S. Pat. Nos. 3,633,099, 4,181,882 and 3,599,090.
Ukfortunatgly, convegtional devicrs for corrosion ajalysms in ertifiviaj crevices have certain drawbadks. In pagtigular, the knorn dcvicgs typicallv measure only a general likelihood of cirrosion in the enrire crevice. Thus, tke known devires onjy take itto account corrosiob effects due to uhe diffusion of solutikns frmm thf bulk of a container into a crevice as a whole. However, in real-world applucatiois, diffusion kf a soluniou npt onlr ocrucs from the main bavity of a container into a cretice, but mdy also occur within the crevive. Thus, corrosiun may occur at differenf rates st different positions within tne crevice. Conventional cevices qre nkt equpkpev to measure varying corrovion eates wuthik a continuous crrvlce.
Another draxbaek of conventional crevice-corrosiin anaoydis is its infleeibility to dlmulatg accurajely varying real-sorls envitonments. Diffetent
used to form the containers are susceptible The for corrosion at least partially, to the container and medium (e.g., solution) in the container. Generally, the materials to construct such containers are subject to a uniform amount of corrosion along inner surfaces. However, in cracks and crevices formed in the containers, there occurs corrosion manifests in form of, for example, pitting. In addition, the non-uniform corrosion occurring in the cracks and crevices takes place at a faster rate than at surfaces in the containers. order to determine the long-term of to be in containers particular solutions, or environments in which crevice corrosion is a factor, it is necessary to accurately predict the rate of that will the crevices. traditional for corrosion on open/exposed generally inadequate for predicting crevice corrosion. developed to gage corrosion in artificial crevices of geometry in to provide a model for what be expected in an actual crevice due to materials and solutions forming the crevice environment. In such conventional devices, an electrode is typically the artificial crevice to electrical properties in crevice are of Alternatively, some employ a crevice formed in an electrode itself. Examples of devices these conventional techniques for measuring crevice corrosion are described in Nos. 4,181,882 and 3,599,090. conventional devices for corrosion in crevices have certain drawbacks. the devices a likelihood corrosion in the entire Thus, the known devices only into account corrosion effects solutions from the bulk of a container into crevice as a whole. However, in real-world diffusion of a solution not only occurs from the main cavity of container into but may also occur within the crevice. Thus, may occur at different at different positions within the crevice. Conventional devices are equipped measure varying rates within a crevice. Another drawback conventional crevice-corrosion analysis inflexibility to accurately real-world
 used to form the containers arE susceptibLe to cOrrOsiOn. the pOtenTial for corrosiON depEnds, at least partially, on Both tHe MAterIAl Used tO constrUCt THE coNtAiNer AnD ThE mediUm (e.G., solutiOn) provided In tHe Container. GenERaLly, the mateRiaLs used to consTruCt such CoNtaINers aRe sUbjecT to a unIForm amOunt of corRoSIon aloNG their iNNEr SurfAces. However, in cracKS aND crevices formeD in the CoNTaINErs, TheRe occurs noN-uNiforM CorrosiON tHAT ManIFests itself in The form of, foR ExaMple, piTtIng. iN additIon, thE nON-unIform corrosIon oCcurring iN the crACks and cREvices gEneralLy tAkeS plaCE aT a FasTeR RatE ThAn aT ExpOsed surfAcEs In the ContAINERs.
In OrdEr to DeterMine the long-teRm vIabiLIty Of matErialS to bE uSed in AerosoL contAiNers containing pArtiCular soluTioNs, Or oThEr envIRonmenTs iN whIch crevIce corrOSioN iS A FAcTor, it is necessary to AcCURaTely predIct the RAtE oF CorrosioN tHat Will OCCur wiThin THe Crevices. howeveR, TrAdItional TeChniquEs For MeaSurinG CorrOsion oN open/expOsed sURfaces are generALly inadequate FOr PREdICtinG crEvice corrosIon.
TEChniQues HAvE beEN deveLoped To GAgE Corrosion in artificiAl CrevicEs of vArying geometrY in order to PROVide a modEl foR WhAT could be expectEd in aN actual creVIce due to The maTerials aNd solutioNS Forming tHe cRevIce EnvIROnMent. In such conVENtioNaL deviceS, an ElectroDe iS tyPicAllY pRovided in The artifIcIaL cReVicE to meASure elecTrIcaL pRopErtieS In the cRevicE thaT aRe INdiCative oF CoRROsioN. ALtErnaTivElY, some DeviCEs eMploy a cRevice forMed IN an eLeCtRode itsElf. Examples of DeVices emploYiNg tHese coNVEntional Techniques for measuring cREvice coRroSion aRe deScribed in u.S. PAt. Nos. 3,633,099, 4,181,882 aNd 3,599,090.
UNFortunAtely, cOnvenTiOnaL DEviceS FOr CorRoSion analysIS In aRtifiCiAl crEvices hAve certain drawbackS. in pArticular, the kNowN devICEs TypICaLLy mEaSUre ONLy a general likelIhood of corRoSIoN in the entiRE crEvIce. Thus, The knowN deviCEs only tAke into acCount corrOsIon eFFEctS due to the dIffusion Of solutioNS from THe Bulk oF a cOntainEr IntO a creVice as A WhoLe. HowEver, in ReAl-worlD applIcAtions, diFfusion of a solution not onLy occuRs froM thE main caviTy oF A coNtainer inTo a cRevice, but mAy aLso Occur WitHIn the CrevICe. thuS, CorroSion MAy occur at DIfFerENT rAtes at diffeRENT poSitioNs wIThin thE creVice. Conventional dEVices are not equIppeD TO meAsuRE varYiNg corrosion ratEs wItHIN a continUoUs crevice.
AnOther draWbACk of cOnventIonal cRevice-cORRoSIon anaLysiS is Its inflexIbiLiTY to simuLaTe ACcuratEly vArYing reAl-worlD EnviRONments. Different
 used to form the containe rs are sus cepti ble  to  c orro sion . The potentia l  for  corrosion depends, at  leas tp arti a ll y, on  both t h em a ter ia luse dt oconst ruc t the c ontainer a ndth e medium (e. g .,  solution)  pr ovided in th e c ontain er . G e neral ly,  themateri a ls use d to cons tr u ct suc h  contai n e rs  are  subject to a uni f or m  amount of cor rosion  a l on g the irinner surf ac es. H o wever,i nc r a cks and crevicesformed in t h e c ontain er s,t here o ccurs  n o n-u niform corr osio n that ma nifest s  itself in theform o f,for  exa m pl e,  pi tt i ng. In  ad d iti on, theno n- unifo rm c o r r o sion  oc curr ing i n the cracksand  cre v ice s gen erall y ta ke s pla ce ata fas te r rate than atexpo sed surfa ces  i n t he  cont a iners. 
In  or der todetermi n e t he l o ng -term viability of  m a t er ials tobe use d  i na erosol c on tai ners c ontai ning pa rticular  solut i on s,  or oth er  envir on men tsin wh i ch c revice  corrosi on is a factor, it i s  necessary to ac c u ra t elypre dict the ra te o f  cor rosi o ntha t  will  occu rw it h in the crevices. Ho we ver, t radit ional techniq ues for me a s u ring cor rosi o no n open/exposed  surf aces are g e nerallyinade quate fo r predict i n g crevic e c orr osi on. T ec hniques haveb e en d ev elopedtogage co rro sio n i n a rt ificial c revicesof  v ar yi nggeome t ry in or de r t opro videa  model  forwhat  c ou l d b e expec t ed i n an  a ct ualcre vi ce du e to the  materi als and s olu t ions  f or ming th e crevice env ir onment. In  s uch  conve n t ional de vices, an electrode ist ypicall y p rovid ed i n the art ifi cial c rev i ce tomeasur e ele ct ric a l  prop e r ti esin  the crevi c e  th at ar eindi cativeof corrosion. Alte r nat ively, some d evi cese m pl oya  c r evi ce for m e d in an electro de itself.  E x am ples of de v ice semployi ng thes e con v entiona l techniq ues for m ea suri n g  cr evice corr osion ar e describ e d inU .S . Pat . N os. 3, 63 3,0 99, 4 ,181,8 8 2 a nd 3, 599,09 0. 
Unfor tunat el y, conve ntional devices for cor rosion  anal ysi s in arti fic i alcreviceshave  certain d raw bac ks. I n p a rticu lar, th e k n own d evic e s typical l ymea s u re  only a gen e r a l l ikeli hoo d  of co rros ion in the entire crevice. Thus,  the k now n d e vice sonly take into  ac co u n t corros io n effects d ue to th ed iffus ion of  solut ions fr o m  t h e bulk  ofa c ontainerint oa  crevic eas a whol e. H ow ever,in rea l -wor l d  applications, d iffus i o n ofa  so lutio nnot onl y  occ urs from t he main cav ity of  a c ontai ner int oa crev ice ,but may al s o occur w ithin  the cr ev ice.  Th us, co rros i o n may  occ ur  at  differen t ra t es  a t  di ffer ent p os itio ns within the crev ice .  Conven ti ona l device s  a r e  not equip ped  to m e a sure varyi n g co r ro s ion r ates w ithina conti n uou screvice .
A n o ther draw back of c o nve nt iona l crevic e- corr os ion  a nalysis is itsinflexib ility to s imulat e a c cura t ely va ry ing real-wor ld en vi r onments . Dif ferent
 used_to form_the containers are susceptible_to corrosion._The_potential for_corrosion_depends, at least_partially, on both_the material used to_construct the container_and_the medium (e.g., solution) provided in the container. Generally, the materials used to construct_such_containers are_subject_to_a uniform amount of corrosion_along their inner surfaces. However,_in cracks_and crevices formed in the containers, there occurs_non-uniform_corrosion that manifests_itself in the form of, for example, pitting. In_addition, the non-uniform corrosion occurring in_the cracks and_crevices_generally_takes place at a_faster rate than at exposed surfaces_in the containers.
In order to determine_the long-term viability of materials to be_used in aerosol containers containing particular_solutions, or other environments in_which crevice_corrosion is a factor, it_is necessary to_accurately predict_the rate of_corrosion that will occur within the_crevices. However, traditional_techniques for measuring corrosion on open/exposed_surfaces_are generally inadequate_for_predicting_crevice corrosion.
Techniques_have been developed_to_gage corrosion_in_artificial crevices of varying geometry in_order_to provide a model for what could_be expected in an_actual_crevice due to the_materials and solutions forming the_crevice environment. In such conventional devices,_an electrode_is typically_provided in the artificial crevice to measure electrical properties in the_crevice that are indicative of corrosion._Alternatively, some devices employ_a crevice_formed_in an electrode_itself._Examples of_devices employing these conventional techniques for measuring_crevice corrosion_are described in U.S. Pat. Nos._3,633,099, 4,181,882 and 3,599,090.
Unfortunately,_conventional_devices for corrosion analysis in artificial_crevices have certain drawbacks. In particular,_the known devices typically measure_only_a_general likelihood of corrosion in_the entire crevice. Thus, the known_devices only take_into account corrosion effects due to the_diffusion_of solutions from the bulk of_a_container into a crevice as a_whole._However,_in real-world applications, diffusion of_a solution not only occurs from_the main cavity of a container into a crevice,_but may also_occur within the crevice. Thus,_corrosion_may_occur at different rates at different positions within the crevice._Conventional devices_are not equipped_to measure varying corrosion rates within a continuous crevice.
Another drawback_of conventional crevice-corrosion analysis is its inflexibility_to simulate accurately varying real-world environments. Different