Kawm txog Corrosion Resistance ntawm Silver Tungsten thiab Silver Tungsten Carbide Hluav Taws Xob

Ntawm cov khoom siv hluav taws xob tiv tauj, AgW thiab AgWC hluav taws xob tiv tauj tau dav siv los ua kev sib cuag hauv ntau lub voj voog hluav taws xob vim tias lawv cov hluav taws xob zoo, hluav taws xob hluav taws xob, thiab hluav taws xob hnav zoo. AgW hluav taws xob tiv tauj tau yooj yim ua tiav thiab tuaj yeem tiv taus qhov hluav taws xob loj tam sim no, yog li lawv tau siv ntau dua hauv Circuit Court breakers dua AgWC. Txawm li cas los xij, nyob rau hauv xyoo tas los no, nrog rau kev txhim kho txuas ntxiv ntawm cov kev xav tau rau kev siv cov hluav taws xob hluav taws xob, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig hnyav, xws li offshore, kub kub thiab av noo siab, cov kev xav tau siab dua tau muab tso rau ntawm qhov kev tiv thaiv corrosion ntawm.Tungsten Brazed Rivetscov ntaub ntawv. Txhawm rau tiv thaiv kev tiv thaiv hluav taws xob los ntawm kev corroded ua ntej siv, ua rau muaj kev tiv thaiv ntau dua lossis txawm tias tsis siv, kev lag luam tam sim no feem ntau siv cov txheej txheem ntawm electroplating nyiaj tom qab vuam kom cais cov tungsten lossis tungsten carbide los ntawm huab cua. Txawm li cas los xij, txij li cov txheej txheej nyiaj electroplated raug hlawv tawm thaum lub sij hawm tshuaj xyuas ntawm lub Circuit Court breaker ua ntej tawm hauv lub Hoobkas los yog thaum ntxov ntawm kev siv, electroplated nyiaj txheej tsis tuaj yeem daws qhov teeb meem ntawm cov hluav taws xob tiv tauj thaum siv. Ntxiv nrog rau electroplating ib txheej nyiaj rau ntawm qhov chaw ntawm cov hluav taws xob tiv tauj, ncaj qha infiltrating ib txheej ntawm cov nyiaj ntawm qhov chaw thaum lub sij hawm tsim cov txheej txheem ntawm kev sib cuag kuj yog ib txoj kev. Tsis ntev los no, muaj kev tshawb fawb txog kev txhim kho corrosion kuj ntawm AgW los ntawm kev ntxiv additives.

Txog qhov kawg, qhov kev tshawb fawb no tau muab piv rau kev tiv thaiv corrosion ntawm AgW thiab AgWC hluav taws xob tiv tauj nyob rau hauv siab thiab qis kub alternating ntub cua sov thiab ntsev tsuag ib puag ncig los ntawm hmoov metallurgy infiltration txheej txheem kom paub meej lub zog ntawm lawv corrosion kuj.

1.1 Kev npaj ntawm AgW thiab AgWC hluav taws xob tiv tauj
Ag hmoov, W hmoov thiab T hmoov (ntxiv) sib tov sib xyaw nrog cov hmoov sib tov, cov hmoov sib xyaw yog granulated, thiab tom qab ntawd pib nias rau hauv cov duab, thiab tom qab ntawd nias cov ntawv ntsuab thiab cov ntawv infiltrated Ag yog muab tso rau hauv lub qhov cub rau infiltration. kom tau txais AgW hluav taws xob tiv tauj nrog cov khoom sib txawv. AgWC cov hluav taws xob sib txuas nrog cov khoom sib txawv tuaj yeem tau txais los ntawm kev siv WC hmoov tsis yog W hmoov thiab siv tib txoj kev. Lub sij hawm sib tov yog 2 h txog 6 h, thiab qhov kub ntawm infiltration yog 1000 degree txog 1300 degree.

Raws li cov txheej txheem saum toj no, plaub yam khoom, AgW-1 (T: 0-0.5%), AgW-2 (T: 1%-1.5%), AgW -3 (T: 2%-2.5%) thiab AgWC (T: 1%-1.5%), tau npaj raws li (saib Table 1 kom paub meej). Yim nplej ntawm txhua yam khoom raug coj mus, thiab cov txheej txheej nyiaj tau raug tshem tawm kom nthuav tawm cov tungsten thiab tungsten carbide hais. Plaub ntawm lawv tau raug coj mus rau qhov kub thiab tsis kub hloov pauv qhov kub thiab txias, thiab plaub qhov ntxiv tau coj mus kuaj tshuaj ntsev.

1.2 Kev ntsuas kub thiab tsis tshua muaj kev sib hloov damp kub kuaj
Lub tungstenHluav taws xob tiv tauj cov ntsiab lustau muab tso rau hauv qhov kub thiab txias alternating damp heat test chamber. Cov xwm txheej kuaj tau pom hauv daim duab 1. Qhov kub tau nce los ntawm 25 degree mus rau 90 degree rau 1 teev, khaws cia tsis tu ncua ntawm 90 degree rau 9 teev, poob ntawm 90 degree mus rau 25 degree rau 1 teev, khaws cia tsis tu ncua ntawm 25 degree rau 1 teev, poob ntawm 25 degree mus rau -25 degree rau 1 teev, khaws cia ntawm -25 degree rau 9 teev, thiab nce ntawm -25 degree mus rau 25 degree rau 1 teev , ua kom tiav ib lub voj voog. Cov av noo yog 0% ntawm -25 degree, 50% ntawm 25 degree, thiab 90% ntawm 90 degree.

1.3 Tshuaj tsuag ntsev
Plaub hom Tungsten Rivet rau Hluav Taws Xob Horn tau muab tso rau hauv cov tshuaj ntsev tsuag tshuaj tiv thaiv corrosion chamber, thiab cov xwm txheej ntsuas tau ua raws li GB / T 6458-1986. Kev ntsuas tseem ceeb: ntsuas kub 35 degree; sodium chloride tov concentration 5%; pH nqi 6.5-7.2; tshuaj tsuag tas mus li.

Qhov saum npoo oxidation ntawmTungsten ContactsRau Cov Khoom Siv Hluav Taws Xob tau pom tom qab 6th thiab 14th cycles ntawm qhov kub thiab tsis kub alternating damp heat test (test end) thiab ntsev tsuag test rau 72 h thiab 240 h (kuaj kawg). Cov txiaj ntsig tshwj xeeb tau qhia hauv Table 2, thiab cov tsos mob tshwm sim hauv Table 3.

Qhov saum npoo ntawm cov hluav taws xob tiv tauj tom qab qhov kev ntsuam xyuas tau kuaj pom los ntawm kev tshuaj ntsuam xyuas electron microscopy los txheeb xyuas nws cov oxidation degree (txiav txim siab los ntawm kev hloov pauv hauv cov ntsiab lus ntawm Ag, O thiab W ntawm qhov chaw). Daim duab 2 mus rau 5 qhia qhov chaw morphologies ntawm plaub hom hluav taws xob tiv tauj tom qab 14 lub voj voog ntawm qhov kub thiab txias alternating damp heat test.

Los ntawm kev tshuaj ntsuam xyuas electron microscope hauv Table 2 thiab cov duab 2 txog 5, nws tuaj yeem pom tau tias nyob rau hauv qhov kub thiab tsis kub hloov pauv damp kub kuaj, oxidation tsis kam ntawm cov khoom AgW nce nrog qhov nce ntawm cov ntsiab lus ntxiv; Cov khoom lag luam AgWC tsis cuam tshuam los ntawm kev hloov pauv dej kub, thiab cov khoom nto tseem tsis hloov pauv tom qab 14 lub voj voog.

Daim duab 6 txog 9 qhia qhov chaw morphology ntawm plaubTungsten Tiv taujCov ntsiab lus tom qab 240 teev ntawm kev ntsuas ntsev tsuag.

Los ntawm kev tshuaj ntsuam xyuas electron microscope hauv Table 2 thiab daim duab 6 txog 9, nws tuaj yeem pom tau tias hauv kev kuaj ntsev ntsev, AgW hluav taws xob tiv tauj thiab AgWC hluav taws xob tiv tauj tsis tau pom tseeb oxidation tom qab 240 h kuaj.

Cov ntsiab lus ntawm cov hlau corrosion yog cov txheej txheem ntawm kev poob los ntawm oxidation-txo cov tshuaj tiv thaiv ntawm cov hlau los yog alloy thiab cov pa ib puag ncig los yog kua hauv kev sib cuag. Nyob rau hauv txoj kev tshawb no, qhov ntsuas kub ntawm ob qho tib si qhov kub thiab txias hloov qhov kub thiab txias thiab cov tshuaj tsuag ntsev tau qis dua qhov kub ntawm tungsten lossis tungsten carbide hauv huab cua. Nyob rau hauv qhov kub thiab tsis kub alternating damp heat test ib puag ncig, condensation tshwm sim ntawm qhov chaw tiv tauj, thiab cov pa roj xws li CO2 thiab SO2 hauv huab cua yaj hauv dej los tsim cov electrolyte. Cov hlau ntau dua tungsten poob electrons thiab oxidized, ua rau electrochemical corrosion. Ntxiv cov additives uas muaj zog tshaj tungsten rau AgW hluav taws xob tiv tauj kom cov additives oxidize ua ntej yuav ncua lub oxidation ntawm tungsten. AgWC hluav taws xob tiv tauj muaj qhov qeeb electrochemical corrosion vim qhov ua haujlwm tsis zoo ntawm WC, uas yog ze rau cov haujlwm ntawm Ag. Hauv kev sim tshuaj ntsev ntsev, txawm hais tias NaCl tov yog siv los ua cov electrolyte, electrochemical corrosion kuj yuav tshwm sim, tab sis vim qhov ntsuas kub qis, tus nqi corrosion qeeb heev.

(1) Nyob rau hauv qhov kub thiab tsis kub alternating damp heat test, oxidation tus nqi ntawm AgW Electrical Tungsten Contact Rivets tsis muaj additives yog qhov ceev tshaj plaws, thiab oxidation tus nqi ntawm AgW hluav taws xob tiv tauj nrog additives yog qeeb. Raws li cov ntsiab lus ntawm additives nce, tus nqi oxidation qeeb.
(2) Nyob rau hauv qhov kub thiab tsis kub alternating damp heat test, tsis muaj cov cim ntawm oxidation tau pom nyob rau hauv AgWC hluav taws xob tiv tauj tom qab 14 lub voj voog. Kev tiv thaiv corrosion ntawm AgWC hluav taws xob tiv tauj yog qhov zoo dua li ntawm AgW hluav taws xob tiv tauj.
(3) Hauv kev kuaj ntsev ntsev, tsis muaj qhov pom tseeb oxidation tshwm sim hauv AgW hluav taws xob tiv tauj thiab AgWC hluav taws xob tiv tauj tom qab 240 teev ntawm kev sim.

Peb Cov Khoom

Peb Cov Hluav Taws Xob TungstenCov ntsiab lus tiv taujyog ua tib zoo crafted high-quality khoom nrog ntau zoo kawg li nta. Ua ntej, kev siv cov khoom siv high-purity tungsten muaj qhov ua tau zoo heev thiab kev kub siab ua haujlwm, thiab tuaj yeem ua haujlwm ruaj khov nyob rau hauv ib puag ncig nyuaj. Nws cov hardness siab thiab muaj zog hnav tsis kam tuaj yeem tswj kev sib cuag zoo rau lub sijhawm ntev thiab txo qhov ua tsis tiav los ntawm kev hnav. Ntxiv mus, peb cov tungsten hu tau zoo ua tiav nrog qhov siab qhov tseeb thiab cov duab tsis tu ncua, uas zoo kawg nkaus phim ntau yam khoom siv hluav taws xob los xyuas kom muaj kev sib kis tau zoo thiab ruaj khov tam sim no. Tsis tas li ntawd, kev soj ntsuam nruj nruj kom ntseeg tau tias txhua qhov kev sib cuag tungsten ua tau raws li cov qauv siab, yog li koj tsis muaj kev txhawj xeeb.