Khoom Description
Kev xaiv cov khoom siv rau cov twj slurry tsis yog ib qho kev tshawb fawb tseeb; nws nyob ntawm cov ntaub ntawv empirical thiab kev paub ntawm engineers. Feem ntau hais lus, cov txheej txheem xaiv cov khoom yuav tsum tau coj mus rau hauv tus account tag nrho cov yam ntxwv sib txawv ntawm cov slurry tshwj xeeb thiab raug txwv los ntawm cov hauv qab no:
Hom twj tso kua mis;
Ntsis ceev ntawm lub impeller (lub voj voog ceev);
Cov qauv ntawm cov khoom nyob rau hauv qhov ntau ntawm cov qauv twj tso kua mis muaj.
Cov ntaub ntawv yooj yim xav tau los xaiv cov ntaub ntawv yog raws li hauv qab no:
Qhov loj me me ntawm cov khoom tawg hauv nruab nrab;
Cov duab thiab hardness ntawm cov khoom.
Corrosivity ntawm cov kua tivthaiv;
Ua haujlwm kub.
Kev xaiv ntawm cov ntaub ntawv rau lub puab liner ntawm lub twj tso kua mis thiab lub impeller feem ntau ntog nyob rau hauv ob theem pib:
Elastomer;
Hnav-resistant/Corrosion-resistant casting alloy;
Ceramics.
Taw qhia
II. Elastomer
Feem ntau siv elastomers hauv slurry twj tuaj yeem muab faib ua peb pawg: roj hmab ntuj, polyurethane thiab hluavtaws elastomers.
Ntuj roj hmab
Thaum cov roj hmab ntuj siv los ua cov khoom siv hauv ob sab phlu, nws nthuav tawm kev yaig zoo heev rau cov khoom siv nrog txoj kab uas hla ntawm 12 hli (1/2 nti). Txawm li cas los xij, thaum ua ntawv thov rau impellers, nws tsis kam mus rau cov khoom uas muaj txoj kab uas hla tshaj 6 hli (1/4 nti) txo qis. Tsis tas li ntawd, cov roj hmab ntuj tau txwv tsis pub hloov mus rau cov xov xwm uas muaj cov khoom ntse. Txawm li cas los xij, qhov kev tiv thaiv tshiab - txiav formulation yuav tsum tau txhim kho qhov tsis zoo no. Vim nws qhov kev ntxhib los mos zoo nkauj, cov roj hmab ntuj yuav raug txiav los yog torn los ntawm loj - cov khib nyiab loj lossis cov khib nyiab. Thaum siv nyob rau hauv kev sib tsoo circuits (xws li pob zeb, semi{13}}autogenous sib tsoo zeb nruas, thiab sib tsoo tshuab dej sau pits vibrating npo), cov kev cai ntawm qhov screen qhov loj thiab cov xwm txheej ntawm lub vijtsam xov xwm yog qhov tseem ceeb los xyuas kom meej tias nws ruaj khov.
Cov roj hmab ntuj muaj qhov tshwj xeeb lagging rov ua haujlwm tsis ua haujlwm, qhov chaw sib sau ntawm cov cua sov sab hauv tuaj yeem ua rau thermal decomposition thiab desulfurization tshwm sim, ua rau muaj kev poob qis hauv cov khoom siv kho tshuab. Txhawm rau zam qhov kev pheej hmoo no, qhov nrawm nrawm ntawm lub impeller feem ntau tswj qis dua 27.5 m / s (5400 ft / min) txhawm rau tiv thaiv thermal degradation hauv thaj tsam ntawm lub tshuab nqus tsev ze ntawm ntug sab nrauv ntawm lub impeller.
Cov roj hmab ntuj muaj qhov tsis zoo rau cov roj, cov kuab tshuaj thiab cov kua qaub uas muaj zog. Tom qab kev sib cuag, nws yooj yim rau qhov loj ntim nthuav dav, txo qis hnav tsis kam thiab txo qis zog ntawm txhua yam. Tsis tas li ntawd, nws tsis tsim nyog rau kev siv qhov twg cov kua dej kub tshaj 75 degree. Rau cov khoom siv tshuaj lom neeg lossis siab - ib puag ncig kub, cov khoom siv hluavtaws yuav tsum tau siv, thiab cov hom tshwj xeeb yuav tsum raug xaiv raws li kev sib xyaw ntawm cov tshuaj nruab nrab thiab kev ua haujlwm kub.
2. Polyurethane
Polyurethane, uas yog ib hom hluavtaws elastomer, yog tsim los ntawm kev sib xyaw ob cov tshuaj ua kua thiab tom qab ntawd kho tom qab nchuav. Cov khoom no nthuav tawm zoo heev tiv thaiv cov khoom zoo thiab ua tau zoo dua li cov roj hmab ntuj hauv qee qhov kev thov.
Txawm hais tias tsis yog cov khoom siv uas tiv taus tshuaj lom neeg corrosion, polyurethane tseem tuaj yeem nthuav tawm cov tshuaj lom neeg zoo dua li cov roj hmab ntuj. Nyob rau hauv cov xwm txheej xws li flotation circuits uas muaj ntau yam tshuaj, nws cov kev pab cuam lub neej yuav ntev npaum li cas ntawm cov roj hmab ntuj. Ntxiv mus, polyurethane tuaj yeem siv los ua lub twj tso kua mis liner rau impellers nrog kev sib hloov ceev ntawm ntau tshaj 27.5 m / s (5400 ft / min) (nyob rau hauv cov xwm txheej no, cov roj hmab ntuj tsis siv ntxiv lawm), thiab nws kuj tseem tsim nyog rau qee qhov xwm txheej uas cov khib nyiab tuaj yeem ua rau cov roj hmab impeller puas.
Vim qhov tseeb tias Shore hardness ntawm polyurethane feem ntau yog siab dua li cov roj hmab ntuj, nws qhov kev ua tau zoo yuav raug txwv thaum cuam tshuam nrog cov khoom ntxhib thiab ntse. Xws li hais yog nquag ua rau peeling ntawm nws nto. Tsis tas li ntawd, cov qauv tshuaj ntawm polyurethane ua rau nws raug rau "hydrolysis" (ib hom tsis ua hauj lwm ntawm elastomers), tshwj xeeb tshaj yog thaum raug cov acids muaj zog lossis muaj zog hauv paus; Txawm li cas los xij, los ntawm kev txhim kho tshwj xeeb, nws qhov kev tiv thaiv rau hydrolysis tuaj yeem txhim kho tau zoo. Lub siab txwv ntawm polyurethane qhov ntsuas kub yog 70 degree, thiab nws yuav degraded los ntawm hydrocarbons.
3. Synthetic Elastomer
Nyob rau hauv lub synthesis ntawm elastomer tebchaw, lub polymer tivthaiv ntawm ntuj roj hmab yog hloov los ntawm tshwj xeeb formulations polymers. Cov polymers tshwj xeeb uas tsim los no tuaj yeem tiv taus cov tshuaj lom neeg ib puag ncig lossis kev ua haujlwm kub. Cov txheej txheem kev hloov kho no feem ntau yuav tsum tau siv cov tshuaj tiv thaiv tshiab, cov tshuaj tua kab mob, thiab lwm yam khoom siv tshwj xeeb uas tau sib xws nrog cov roj hmab uas tau xaiv.
Txawm hais tias hluavtaws elastomers outperform ntuj roj hmab nyob rau hauv cov nqe lus ntawm chemical resistance thiab tshav kub kuj, muaj ib tug tseem ceeb kev lag luam tawm -tawm: lawv hnav tsis kam yog feem ntau qis dua li ntawm cov roj hmab ib txwm nrog optimized formulation. Cov yam ntxwv sib txawv no tshwm sim los ntawm qhov kev txiav txim siab ua ntej hauv cov khoom tsim - hluavtaws elastomers txhim kho lawv cov kev hloov pauv ib puag ncig los ntawm kev tswj hwm cov qauv molecular, tab sis kev cuam tshuam hauv lawv cov khoom sib txhuam. Qhov no muab lub hauv paus tseem ceeb rau kev xaiv cov khoom siv hauv kev ua haujlwm tshwj xeeb, uas yog, qhov sib npaug ntawm cov phiaj xwm yuav tsum raug ntaus ntawm ib puag ncig kev kam rau siab thiab hnav tsis kam.
III. Hnav-resistant/Erosion-resistant Casting Alloys
Cov hnav-cov hlau tsis muaj zog yog tsim rau cov khoom siv sab hauv thiab lub impeller ntawm cov twj slurry thiab tuaj yeem ua haujlwm nyob rau hauv cov xwm txheej uas cov khoom siv roj hmab tsis txaus, suav nrog cov khoom loj lossis ntse, lub taub hau siab (siab impeller rotational ceev), siab ua haujlwm kub, thiab cov nplua nuj nyob hauv hydrocarbons.
Nyob rau hauv daim ntawv thov ntawm centrifugal twj slurry, siab -chromium dawb hlau yog cov feem ntau siv alloy series. Hom alloy no yog ua los ntawm hlau, nrog cov hlau carbides accounting rau 15% mus rau 55% ntawm lub ntim, uniformly dispersed nyob rau hauv nws. Cov carbides tuaj yeem muaj qhov hardness tshaj 1200HV, muab cov alloy zoo heev yaig kuj. Txawm li cas los xij, qhov muaj cov carbide nyuaj ua rau txo qis ntawm cov khoom siv tawv thiab cov khoom siv kho tshuab dav dav - siab -chromium dawb hlau yog qhov ua rau tawg tawg thaum raug cuam tshuam. Tam sim no, dhau los ntawm - kev tshawb fawb tob ntawm cov khoom siv no thiab kev txhim kho txuas ntxiv ntawm kev tsim cov twj slurry, qhov ua tsis tiav los ntawm cov pob txha tawg tuaj yeem kho tau zoo.
High -chromium cam khwb cia hlau dawb tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm feem ntau cov kev ua haujlwm thiab muaj kev ua siab ntev rau ntau yam tshuaj. Txawm li cas los xij, vim nws cov kua qaub tsis txaus, cov khoom lag luam feem ntau tsuas yog tsim nyog rau ib puag ncig nrog pH ntau dua 4. Rau cov kua qaub acidic uas muaj pH ntawm 1 lossis tsawg dua, txawm hais tias muaj kev siab siab siab -chromium cam khwb cia hlau hlau xaiv muaj, lawv hnav tsis kam yog qis dua li cov qauv ib txwm muaj.
Rau cov xwm txheej uas muaj cov kab mob corrosive ntshiab lossis cov uas xav tau kev cuam tshuam tshwj xeeb, cam khwb cia hlau thiab npib tsib xee alloy series tuaj yeem xaiv. Nyob rau hauv lub teeb heev slurry qhov nruab nrab yog heev corrosive, duplex stainless hlau los yog austenitic stainless hlau yuav siv tau; rau cov slurry uas muaj zog corrosiveness, npib tsib xee-raws li alloys yuav tsum tau xaiv. Nws yuav tsum tau hais tias cov hlau thiab npib tsib xee alloys tsis yog tsim los rau kev hnav tsis kam. Lawv qhov kev txhim kho corrosion kuj feem ntau yog nyob ntawm tus nqi ntawm kev hnav tsis kam, yog li lawv feem ntau tsis pom zoo rau cov xwm txheej cuam tshuam nrog cov khib nyiab erosive.
IV. Ceramics
Cov khoom siv feem ntau siv hauv cov twj slurry tuaj yeem muab faib ua peb pawg: polymer-raws li ceramics, ua haujlwm ceramics. Cov ntaub ntawv ceramic muaj kev tiv thaiv corrosion zoo heev thiab hnav tsis kam, tab sis lawv muaj lub voj voog ntau lawm thiab kev ua haujlwm siab, uas ua rau cov nqi tsim khoom kuj siab.
Polymer{0}}raws li ceramics
Epoxy composite ceramics: Raws li epoxy resin, lawv muaj cov adhesion zoo, corrosion kuj, thiab qhov ntev stability. Oxide aluminium thiab silicon carbide hais, nrog rau luv - txiav fibers, yog siv los ua cov txheej txheem ceramic. Tom qab kho, lawv tsim cov khoom sib xyaw nrog lub zog siab thiab tawv, muaj cov tshuaj tiv thaiv corrosion zoo dua li polyurethane- cov khoom siv, thiab muaj kev cuam tshuam tsis zoo. Lawv feem ntau yog siv rau sab hauv txheej txheej ntawm slurry twj los yog hauv zos hnav- cov khoom tiv thaiv (xws li cov hauv ob sab hauv ntawm cov twj tso kua mis thiab cov npoo ntawm impellers), tshwj xeeb tshaj yog nyob rau hauv slurry ib puag ncig nrog nruab nrab concentration ntawm acidic los yog alkaline chemical media.
Vinyl composite ceramics: Vinyl resin ua ke nrog cov tawv tawv thiab tshuaj tiv thaiv ntawm epoxy resin, nrog rau kev kho cov khoom ntawm unsaturated polyester. Nrog alumina, silicon carbide, thiab lwm yam raws li cov theem kev txhawb zog, ua ke nrog ceramic fibers / whiskers, cov khoom siv cuam tshuam thiab tsim kua muag kuj tau txhim kho. Haum rau slag slurry kev kho mob scenarios nrog nruab nrab particle loj thiab complex tshuaj ib puag ncig.
Polyurethane-raws li kev sib xyaw ceramics: Siv polyurethane (PU) ua cov matrix, cov khoom siv tawv tawv xws li txhuas oxide (Al₂O₃), silicon carbide (SiC), thiab zirconia (ZrO₂) yog siv los ua cov txheej txheem ceramic. Los ntawm kev ua kom muaj zog ntawm cov khoom siv ceramic, kev hnav tsis kam thiab kev cuam tshuam ntawm polyurethane tau txhim kho zoo, thaum qhov hloov pauv ntawm polyurethane khaws cia, ua kom nws tiv taus yaig thiab hnav los ntawm nplua rau nruab nrab - cov khoom loj. Nws yog qhov tsim nyog rau cov xwm txheej uas cuam tshuam nrog cov khoom siv tshuaj lom neeg lossis cov khoom siv nruab nrab slurry, xws li flotation circuits thiab tailings kev thauj mus los. Tshwj xeeb tshaj yog thaum hloov cov roj hmab ib txwm muaj, nws tuaj yeem sib npaug ntawm cov tshuaj tiv thaiv thiab hnav tsis kam.
2. Muaj nuj nqi Ceramics
Alumina ceramic (Al₂O₃ ceramic): Alumina ceramic yog thawj zaug ua haujlwm ceramic siv hauv slurry twj. Qhov siab dua nws cov tawv tawv thiab hnav tsis kam, thiab nws cov tshuaj lom neeg ua haujlwm ruaj khov (tshwj tsis yog muaj zog alkaline daws thiab hydrofluoric acid), tus nqi qis dua. Nws yog feem ntau siv rau hauv ob sab hauv, lub tes tsho tiv thaiv, thiab hnav hauv zos -cov txheej txheem tiv thaiv ntawm lub impeller ntawm slurry twj, tshwj xeeb tshaj yog tsim rau tuav nruab nrab hnav siv slurry, tab sis nws muaj lub brittleness ntau dua thiab tsis zoo cuam tshuam.
Silicon carbide ceramics (SiC ceramics): Silicon carbide ceramics (tshwj xeeb tshaj yog cov tshuaj tiv thaiv-sintered SiC thiab siab- dawb sintered SiC) muaj qhov hnav tsis zoo, zoo corrosion kuj (tsis resistant hydrofluoric acid thiab muaj zog oxidizing acids), thermal conductivity zoo, kub tsis kam, thiab superior thermal shock resistance piv rau alumina ceramics. Lawv tsim nyog rau siab -kev tu, muaj zog- xeb lossis siab- qhov kub thiab txias slurry, xws li siab -slurry uas muaj cov khoom ntse (xws li quartz xuab zeb, hlau slag), los yog acid / alkali- muaj cov tshuaj slurry. Lawv feem ntau yog siv los ua cov tub ntxhais hnav- cov khoom tiv thaiv xws li impellers, cov phaj tiv thaiv pem hauv ntej, thiab hnav cov nplhaib ntawm cov twj slurry.
Zirconia toughened ceramics (ZrO₂ ceramics): Cov ceramics yog toughened los ntawm stabilizers xws li yttrium oxide (Y₂O₃), thiab muaj tsis tshua muaj siab tawg toughness (3-5 npaug ntawm alumina ceramics) thiab hnav tsis kam. Lawv muaj hardness siab (Mohs hardness li ntawm 8.5 mus rau 9 qib) thiab zoo heev corrosion kuj (tshwj tsis yog rau hydrofluoric acid): Lawv yog haum rau cov ntaub ntawv uas hais tias nyob rau hauv lub slurry muaj ib tug tej yam kev cuam tshuam (xws li coarse particle slag, xuab zeb, thiab gravel), thiab yuav siv tau rau cov khoom xws li impellers thiab hnav- cov khoom siv rau cov khoom siv sib xyaw ua kom zoo dua qub. nyob rau hauv nruab nrab hnav siv thiab cuam tshuam-resistant tej yam kev mob.
V. Kev Taw Qhia rau Kev Siv Warman Material System
Code
Khoom npe
Hom
Function Description
A04
ULTRACHROME® 24% Chromium Corrosion-Resistant Grey Hlau
Dawb cam khwb cia hlau
A04 alloy yog hom hlau dawb tshwj xeeb uas tsim los rau kev ua haujlwm drilling thiab tapping. Kev tiv thaiv corrosion ntawm A04 tsis zoo li ntawm A05 thiab feem ntau nws tsis yog corrosion-resistant. A04 yog siv rau sealing adapters, cov thawv ntim khoom thiab cov khoom tso tawm.
A05
ULTRACHROME® 27% Chromium Corrosion-Resistant Grey Hlau
Dawb cam khwb cia hlau
A05 alloy yog ib hom kev hnav- tiv taus dawb cam khwb cia hlau, uas ua tau zoo heev nyob rau hauv ntau yam kev yaig nrog rau qhov chaw me me corrosive. Lub siab hnav tsis kam ntawm A05 yog vim muaj cov carbide nyuaj hauv nws cov microstructure.
A25
Ni-Cr-Mo steel
Cam khwb cia hlau
A25 alloy yog ib hom hlau alloy nrog nruab nrab hnav tsis kam thiab siab ua haujlwm siab. Qhov no alloy yog siv rau loj castings qhov twg toughness yog qhov tseem ceeb tshaj plaws, xws li lub twj tso kua mis casing rau gravel.
A49
ULTRACHROME® 28% Chromium Tsawg Carbon Siab -Chromium Tsawg- Carbon Dawb Hlau
Dawb cam khwb cia hlau
A49 alloy yog ib qho corrosion-resistant dawb cam khwb cia hlau uas haum rau tsawg pH corrosive tej yam kev mob. Txawm li cas los xij, nws kuj muaj qhov teeb meem ntawm kev yaig hnav. Qhov no alloy yog tshwj xeeb tshaj yog haum rau flue gas desulfurization (FGD) thiab lwm yam corrosive slurry daim ntaub ntawv.
A53
ULTRACHROME® Austenitic Stainless Steel High -Chromium Dawb Hlau
Dawb cam khwb cia hlau
A53 alloy yog siab corrosion-resistant alloy nrog nruab nrab corrosion kuj. A53 tuaj yeem siv rau hauv cov ntawv thov pH qis, xws li cov xwm txheej phosphate lossis qee cov ntawv thov tshem tawm sulfur dioxide, qhov twg muaj teeb meem yaig.
A61
HYPERCHROME® 30% Cr High Chromium Dawb Hlau
Dawb cam khwb cia hlau
Lub A61 alloy yog ib tug hypereutectic dawb cam khwb cia hlau. Vim tias muaj cov khoom ntim ntau ntawm cov tawv thiab hnav- tiv taus chromium carbides nyob rau hauv cov hlau matrix, nws muaj qhov tsis zoo corrosion kuj.
A68
HYPERCHROME® 30% Cr High Chromium Dawb Hlau
Dawb cam khwb cia hlau
A68 alloy yog cov hlau dawb hypereutectic. Nws yog qhov tsim nyog rau kev hnav khaub ncaws siab thiab muaj kev tiv thaiv me me. Nws yuav tsum tau siv nyob rau hauv daim ntawv thov qhov zoo sib xws corrosion kuj rau Ultrachrome A05 alloy thiab zoo hnav tsis kam tshaj li Hyperchrome® A61 alloy yuav tsum tau.
A241
ULTRACHROME® 32% Chromium High Chromium Dawb Hlau
Dawb cam khwb cia hlau
A241 alloy yog hnav-tiv taus thiab cuam tshuam- tiv taus dawb cam khwb cia hlau. Nws tau raug kho kom zoo rau cov ntawv thov uas cuam tshuam ua rau cov khoom poob. Piv nrog A61, A241 muaj kev cuam tshuam zoo heev, thiab piv nrog A05, nws muaj kev tiv thaiv corrosion zoo heev.
C21
13% chrome hlau
Martensitic stainless hlau
C21 alloy yog tag nrho hardened 420C stainless hlau.
C23
CF-8M stainless hlau
Austenitic stainless hlau
C23 alloy yog CF-8M stainless hlau. C23 muaj kev tiv thaiv corrosion zoo heev, tab sis nws cov kev tiv thaiv corrosion tsis zoo. Nws yog qhov sib npaug ntawm 316SS.
C26
CD-4MCuN Stainless hlau
Duplex stainless hlau
C26 alloy yog CD-4M CuN duplex stainless hlau. Nws yog corrosion-resistant ntau dua li C23, tab sis feem ntau muaj cov tsis zoo corrosion kuj. Qhov no yog qhov sib npaug ntawm 2205SS.
D21
Spheroidal graphite cam khwb cia hlau (SG hlau)
Cam khwb cia hlau
D21 alloy yog qib ntawm cov hlau uas muaj xim greyish, thiab yog siv los ua cov khoom siv rau cov twj tso kua mis thiab cov thav ntawv.
D25
Siab -lub zog hlau nplaum (SG hlau)
Cam khwb cia hlau
D25 alloy yog cov khoom siv hlau, siv rau siab - cov hlab ntsha uas xav tau lub zog siab tshaj plaws.
N02
63% Ni 30% Cu alloy
Corrosion{0}}resistant npib tsib xee alloy
N02 alloy yog npib tsib xee- tooj liab alloy uas haum rau corrosive ib puag ncig tab sis muaj kev hnav tsis zoo. N02 tseem hu ua Monel alloy.
N22
58N 22Cr 12Mo alloy
Corrosion{0}}resistant npib tsib xee alloy
N22 yog ib qho corrosion tsis tshua muaj zog-cov hlau tsis muaj zog, siv rau hauv cov ntawv siv hnyav heev uas txawm tias austenitic thiab austenitic superalloy tsis tuaj yeem tiv taus. N22 tseem hu ua Hastelloy® C-22®.
J32
70% tungsten carbide txheej 420SS
Ceramic{0}}coated stainless hlau
J32 yog hlau -ceramic composite txheej, muaj li ntawm 70% tungsten carbide thiab 420 stainless hlau substrate. Nws yog siv rau lub tes tsho ncej hauv corrosive tej yam kev mob.
J37
70% tungsten carbide txheej CD4-MCUN
Ceramic{0}}coated duplex stainless hlau
J37 yog hlau -ceramic composite txheej, muaj li ntawm 70% tungsten carbide thiab duplex stainless hlau substrate. Nws yog siv rau lub tes tsho ncej hauv corrosive thiab abrasive tej yam kev mob.
J39
80% tungsten carbide txheej 420SS
Ceramic{0}}coated stainless hlau
J39 yog hlau -ceramic composite txheej, muaj li ntawm 80% zoo-grained tungsten carbide thiab 420 stainless hlau substrate. Nws yog siv rau lub tes tsho ncej nyob rau hauv tsis tshua muaj abrasive tej yam kev mob thiab muaj siab hnav tsis kam piv rau J32.
R35
Linatex® Premium Roj Hmab
Ntuj roj hmab
R35 Linatex hwm yog cov roj hmab mos thiab elastic heev uas tau ua kom zoo rau cov khoom siv slurry puas.
R55
Lub qhov tso tawm ntawm lub zeb yog ua los ntawm cov roj hmab ntuj.
Ntuj roj hmab
R55 ntuj roj hmab yog ib qho kev sib txuas tshwj xeeb tsim los hais txog qhov dav dav slurry faib hauv cov ntawv tso tawm ntawm cov tshuab sib tsoo.
R508
Lub qhov tso tawm ntawm lub zeb yog ua los ntawm cov roj hmab ntuj.
Ntuj roj hmab
R508 ntuj roj hmab yog ib qho sib xyaw tshwj xeeb uas tsim los rau cov ntawv thov uas xav tau tshaj plaws, muaj lub zog tsim kua muag thiab lub zog tensile.
S01
EPDM roj hmab
Synthetic elastomer
S01 yog ib qho hluavtaws elastomer nrog cov kua qaub zoo heev thiab ozone tsis kam. Nws yog tsuas yog siv nyob rau hauv sealing daim ntawv thov vim nws tsis tshua muaj compressive mus tas li deformation khoom.
S12
Nitrile roj hmab
Synthetic elastomer
S12 yog ib hom roj hmab hluavtaws feem ntau siv rau hauv daim ntawv thov uas muaj roj, roj thiab siv quav ciab. S12 muaj nruab nrab corrosion kuj.
S21
Butyl (IIR) roj hmab
Synthetic elastomer
Cov roj hmab hluavtaws S21 nthuav tawm cov tshuaj lom neeg ruaj khov zoo, ua haujlwm zoo thaum tshav kub kub thiab oxidation tsis kam, tab sis tsis zoo corrosion kuj. S21 yog siv nyob rau hauv acidic ib puag ncig.
S31
Chlorosulfonated polyethylene
Synthetic elastomer
S31 yog ib qho tshuaj tiv thaiv kab mob thiab tshav kub- tiv taus elastomer. Nws muaj kev ruaj ntseg zoo heev rau cov kua qaub thiab hydrocarbons.
S42
Polybutadiene
Synthetic elastomer
S42 yog qhov siab -lub zog hluavtaws elastomer nrog kev ua haujlwm zoo tsuas yog qis dua li ntawm cov roj hmab ntuj. S42 muaj qhov kub thiab txias tsis kam thiab roj tsis kam. Nws feem ntau yog siv nyob rau hauv cov xwm txheej uas hydrocarbon -raws li ntuj roj hmab degrades.
S51
Fluorosilicon polymer
Synthetic elastomer
S51 hluavtaws elastomer nthuav tawm zoo heev tiv thaiv cov roj thiab tshuaj nyob rau hauv qhov kub thiab txias, tab sis muaj tsis zoo corrosion kuj.
U38
Hnav-resistant polyurethane
Polyurethane elastomer
U38 yog ib qho kev yaig- cov khoom siv tiv taus uas ua tau zoo hauv cov ntawv thov elastomer thiab tsim nyog rau cov teeb meem " impurity". Qhov no yog ntaus nqi rau U38 lub siab tsim kua muag thiab lub zog tensile. Txawm li cas los xij, nws cov erosion kuj tsis zoo li cov roj hmab ntuj (R55ª roj hmab).
Y08
Silicon nitride ua ke nrog silicon carbide
Ceramics
Y08 yog ib qho hnav-cov khoom siv tiv thaiv ceramic uas ua tau zoo hauv cov khoom siv hnav zoo, tab sis muaj kev tiv thaiv tsis zoo rau cov khoom cuam tshuam thiab yaig ntau dua -1 hli.
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