Hauv thaj tsam ntawm kev sim ib puag ncig, kev ntsuas ntsev pos huab yog ib txoj hauv kev tseem ceeb rau kev ntsuas qhov kev tiv thaiv corrosion ntawm cov khoom thiab cov khoom. Cov lus qhia dav dav no delves rau hauv cov qauv ntsuas rau kev ntsuas ntsev pos huab sivntsev pos test Chambers, tshawb txog nws qhov tseem ceeb, txheej txheem, thiab kev siv thoob plaws ntau yam kev lag luam. Txawm hais tias koj yog cov chaw tsim khoom, tus kws tshaj lij, lossis tus kws tshaj lij tswj kev ua haujlwm zoo, kev nkag siab qhov tsis sib xws ntawm kev ntsuas ntsev pos huab yog qhov tseem ceeb rau kev ua kom cov khoom ruaj khov thiab kev ntseeg tau.
Dab tsi yog Kev Ntsuas Ntsev Fog?
Ntsev pos testing, tseem hu ua ntsev tsuag tshuaj ntsuam, yog txheej txheem txheej txheem tsim los ntsuas qhov kev tiv thaiv corrosion ntawm cov ntaub ntawv thiab txheej txheej. Qhov kev ntsuas ceev nrawm no simulates qhov hnyav ntawm ntug dej hiav txwv ib puag ncig lossis dej hiav txwv uas cov khoom yuav ntsib thaum lawv lub neej. Los ntawm kev nthuav tawm cov qauv mus rau qhov chaw tswj hwm ntsev-laden, cov kws tshawb fawb, thiab cov tuam txhab lag luam tuaj yeem kwv yees seb cov ntaub ntawv yuav ua li cas hauv qhov chaw muaj corrosive tiag tiag.
Qhov tseem ceeb ntawm Kev Ntsuas Ntsev Fog
Corrosion ua rau muaj kev hem thawj rau ntau yam kev lag luam, ua rau cov khoom siv degradation, kev ua haujlwm tsis zoo, thiab kev poob nyiaj txiag ntau. Kev ntsuam xyuas ntsev pos huab yog ib qho kev ntsuas ntsuas los txheeb xyuas qhov muaj peev xwm tsis zoo hauv cov ntaub ntawv thiab cov txheej txheem ua ntej lawv raug xa mus rau hauv ib puag ncig corrosive. Txoj kev ntsuas no yog qhov tseem ceeb tshwj xeeb rau kev lag luam xws li tsheb, aerospace, marine, thiab electronics, qhov twg muaj ntsev ntau hauv huab cua.
Daim ntawv thov thoob plaws kev lag luam
Lub versatility ntawm ntsev pos huab xeem ua rau nws muaj feem xyuam nyob rau hauv ib tug ntau yam ntawm sectors. Hauv kev lag luam tsheb, nws tau siv los ntsuas qhov kev tiv thaiv corrosion ntawm lub tsheb, suav nrog lub cev vaj huam sib luag, fasteners, thiab hluav taws xob txuas. Aerospace cov tuam txhab cia siab rau kev ntsuas ntsev pos kom ntseeg tau tias kev ncaj ncees ntawm cov khoom siv dav hlau raug cuam tshuam rau thaj chaw maritime. Cov cuab yeej siv dej hiav txwv, cov qauv hauv ntug dej hiav txwv, thiab cov chaw hauv ntug dej hiav txwv kuj tau txais txiaj ntsig los ntawm qhov kev sim no los kwv yees thiab txo cov teeb meem cuam tshuam txog corrosion.
Evolution of Salt Fog Test Standards
Tau ntau xyoo, cov qauv ntsuas ntsuas ntsev ntsev tau hloov zuj zus los ua kom tau raws li qhov kev hloov pauv ntawm kev lag luam thiab kev ua haujlwm thev naus laus zis. Los ntawm cov hnub thaum ntxov ntawm rudimentary ntsev tsuag txee rau niaj hnub, sophisticatedntsev pos test Chambers, cov txheej txheem tau ua kom zoo dua los muab cov txiaj ntsig zoo dua thiab rov ua dua tshiab. Qhov kev hloov pauv no tau coj mus rau kev tsim cov qauv kev lees paub thoob ntiaj teb uas coj kev coj ua ntawm kev ntsuas ntsev pos thoob plaws ntiaj teb.
Standard Salt Fog Test Procedure
Cov qauv ntsuas rau ntsev pos ua raws li cov txheej txheem tshwj xeeb uas tau teev tseg hauv cov qauv kev lees paub thoob ntiaj teb xws li ASTM B117, ISO 9227, thiab JIS Z 2371. Cov qauv no muab cov lus qhia ntxaws ntxaws rau kev kuaj ntsev pos huab, kom ntseeg tau tias muaj kev sib luag thiab rov tsim cov txiaj ntsig thoob plaws cov chaw sim sib txawv. Cia peb tshawb txog cov ntsiab lus tseem ceeb thiab cov kauj ruam uas muaj feem xyuam nrog cov txheej txheem ntsev pos huab.
Test Chamber Teeb
Nyob rau hauv lub plawv ntawm cov ntsev pos huab xeem yog ntsev pos huab kuaj chamber, ib tug tshwj xeeb enclosure tsim los tsim thiab tswj ib tug tswj corrosive ib puag ncig. Cov chav no tau nruab nrog kev tswj qhov kub thiab txias, cov tshuaj ntsev atomizers, thiab cov tshuab cua tshuab kom ntseeg tau tias muaj kev sib faib ntawm cov ntsev pos huab thoob plaws hauv cheeb tsam sim. Lub chamber cov ntaub ntawv tsim kho yuav tsum tiv taus cov corrosive los ntawm cov ntsev ntsev kom tsis txhob muaj kab mob ntawm qhov chaw kuaj.
Kev npaj ntsev ntsev
Cov tshuaj ntsev uas siv rau hauv qhov kev sim no feem ntau yog 5% sodium chloride (NaCl) tov, npaj siv cov dej ntshiab huv thiab reagent-qib sodium chloride. Cov tshuaj pH yog ua tib zoo saib xyuas thiab kho kom poob rau hauv qhov kev teev tseg, feem ntau ntawm 6.5 thiab 7.2. Qhov kev tswj xyuas meej ntawm cov ntsev ntsev muaj pes tsawg leeg ua kom muaj kev sib haum xeeb hauv ib puag ncig corrosive thoob plaws cov kev sim thiab cov chaw sib txawv.
Kev Npaj thiab Kev Tso Cai
Cov qauv kuaj tau raug npaj ua raws li cov qauv tsim nyog thiab cov kev cai tshwj xeeb ntawm kev xeem. Qhov no yuav suav nrog kev tu, degreasing, thiab qee zaum siv cov txheej tiv thaiv lossis kev kho mob. Tom qab ntawd cov qauv yog muab tso rau hauv lubntsev fog test chamber, feem ntau ntawm kaum ntawm 15-30 degrees los ntawm ntsug. Qhov kev taw qhia no tso cai rau kom raug rau cov ntsev pos huab thiab tiv thaiv kev sib sau ntawm cov ntsev tso rau ntawm qhov chaw seem.
Ua Kev Ntsuas Ntsev Fog
Nrog lub chamber teeb tsa thiab cov qauv hauv qhov chaw, qhov ntsuas ntsev pos huab pib. Lub sijhawm ntawm qhov kev xeem tuaj yeem sib txawv heev nyob ntawm tus qauv tshwj xeeb tau ua raws thiab cov kev xav tau ntawm cov khoom lossis cov khoom raug kuaj. Qee qhov kev ntsuam xyuas yuav khiav tsawg li 24 teev, thaum lwm tus tuaj yeem txuas mus rau ob peb lub lis piam lossis ntau lub hlis rau kev ntsuas kev tiv thaiv corrosion mus ntev.
Kev soj ntsuam kuaj mob
Thoob plaws lub sijhawm xeem, ntau qhov ntsuas tau raug saib xyuas kom ntseeg tau qhov kev ntseeg siab ntawm qhov chaw sim. Cov no suav nrog:
- Kub: Feem ntau tuav ntawm 35 degree (95 degree F) ± 2 degree
- Ntsev pos huab ntom: ntsuas siv cov khoom sib sau tso rau ntawm qhov chaw tshwj xeeb hauv chav
- pH ntawm cov kua ntsev uas tau sau tseg: Tshawb xyuas tsis tu ncua kom paub tseeb tias nws nyob hauv qhov chaw teev tseg
- Cua siab: Saib xyuas kom muaj kev sib haum xeeb atomization ntawm ntsev tov
Kev soj ntsuam raws sij hawm
Nyob ntawm lub sijhawm xeem thiab cov kev cai tshwj xeeb, kev tshuaj xyuas ib ntus ntawm cov qauv kuaj yuav raug ua. Cov kev soj ntsuam no tso cai rau cov ntaub ntawv ntawm kev txhim kho corrosion thiab tuaj yeem muab kev pom zoo rau kev ua haujlwm corrosion ntawm cov ntaub ntawv lossis cov coatings raug kuaj.
Test Conclusion thiab Specimen Evaluation
Tom qab ua tiav ntawm lub sijhawm xeem, cov qauv raug ua tib zoo tshem tawm ntawm qhovntsev fog test chamber. Tom qab ntawd lawv maj mam muab yaug kom tshem tawm cov ntsev deposits thiab qhuav ua ntej kev soj ntsuam zoo. Qhov kev ntsuam xyuas yuav suav nrog kev tshuaj xyuas qhov muag, ntsuas qhov tob ntawm corrosion los yog cheeb tsam, thiab ntau yam kev tshuaj ntsuam xyuas kom muaj nuj nqis ntawm corrosion thiab nws qhov cuam tshuam rau cov khoom siv.
Txhais lus ntsev Fog Test Results
Kev txhais cov ntsiab lus ntawm ntsev pos huab yuav tsum muaj kev txawj ntse thiab kev nkag siab zoo ntawm ob qho tib si kev sim thiab cov yam ntxwv ntawm cov khoom siv. Cov txiaj ntsig feem ntau yog ntsuas raws li ntau yam, suav nrog:
Kev ntsuam xyuas pom
Kev kuaj pom ntawm cov qauv tuaj yeem pom qhov hloov pauv ntawm qhov chaw, xws li pitting, discoloration, lossis tsim cov khoom siv corrosion. Qhov kev ntsuam xyuas zoo no muab kev nkag siab tam sim rau hauv cov khoom siv tiv thaiv corrosion thiab tuaj yeem hais txog qhov kev txhawj xeeb lossis kev ua haujlwm tsis tau xav txog.
Kev ntsuas qhov ntsuas
Kev txheeb xyuas ntau yuav suav nrog kev ntsuas qhov hnyav, qhov tob ntawm corrosion, lossis thaj chaw cuam tshuam los ntawm corrosion. Cov kev ntsuas no muab lub hom phiaj kev ntsuas ntau dua ntawm kev tiv thaiv corrosion thiab tuaj yeem siv los sib piv cov khoom sib txawv lossis kev kho mob ncaj qha.
Cov txheej txheem ua haujlwm
Cov txheej txheem kev lees paub rau kev ntsuas ntsuas huab cua sib txawv nyob ntawm kev lag luam, daim ntawv thov, thiab cov khoom siv tshwj xeeb. Qee cov qauv muab cov lus qhia rau kev txhais cov txiaj ntsig, thaum lwm tus tawm mus rau qhov kev txiav txim siab ntawm cov chaw tsim khoom lossis cov neeg siv kawg txhawm rau txheeb xyuas qhov ua tau zoo.
Xaus
Cov qauv ntsuas rau ntsev pos tseem yog lub hauv paus ntawm kev ntsuas kev tiv thaiv corrosion thoob plaws ntau qhov kev lag luam. Nws lub peev xwm los simulate hnyav, ntsev-nplua nuj ib puag ncig hauv lub sijhawm nrawm ua rau nws muaj txiaj ntsig zoo rau cov tuam txhab, cov kws tsim khoom, thiab cov kws tshawb fawb tib yam. Los ntawm kev nkag siab txog cov hauv paus ntsiab lus, cov txheej txheem, thiab kev txhais lus ntawm kev ntsuas ntsev pos huab, cov kws tshaj lij tuaj yeem txiav txim siab txog kev xaiv cov khoom siv, cov tswv yim tiv thaiv corrosion, thiab cov khoom tsim.
Xav paub ntau ntxiv txog pebntsev pos test Chambersthiab yuav ua li cas lawv tuaj yeem tau txais txiaj ntsig zoo rau koj cov txheej txheem kuaj corrosion, thov tsis txhob yig tiv tauj. Tiv tauj peb ntawminfo@libtestchamber.comrau kev pabcuam tus kheej thiab nrhiav seb peb tuaj yeem pab txhawb koj li cas rau kev kuaj ib puag ncig.
Cov ntaub ntawv
1. ASTM International. (2019). ASTM B117-19 Tus Qauv Ua Haujlwm rau Kev Ua Haujlwm Ntsej Muag (Fog) Apparatus. West Conshohocken, PA: ASTM International.
2. Lub koom haum International rau Standardization. (2017). TS EN ISO 9227: 2017 Kev ntsuas Corrosion nyob rau hauv cov huab cua tsim - Kev ntsuas ntsev tsuag. Geneva: ISO.
3. Japanese Standards Association. (2000). JIS Z 2371: 2000 Kev kuaj ntsev ntsev. Tokyo: JSA.
4. Corrosion Testing Laboratories, Inc. (2018). Phau Ntawv Qhia Txog Kev Ntsuas Corrosion thiab Kev Ntsuas. New York: Wiley-Interscience.
5. National Association of Corrosion Engineers. (2020). NACE Corrosion Engineer's Reference Book. Houston: NACE International.
6. American Society for Metals. (2021). ASM Phau Ntawv Qhia, Volume 13A: Corrosion: Fundamentals, Testing, and Protection. Materials Park, OH: ASM International.
