Corrosion Resistance Rating thiab Kev Pabcuam Ib puag ncig kev sib raug zoo xaiv cov txheej txheem fastening
Dab tsi yog qhov sib txawv ntawm C5 thiab C2 los tiv thaiv- qib corrosion ntawm fastening systems, thiab qhov chaw twg lawv tsim nyog rau?
C5 anti- qib corrosion muaj txheej thickness ntau dua los yog sib npaug rau 400μm, siv peb zaug kev tiv thaiv "kub-dip galvanizing + zinc-nplua nuj epoxy + polyurethane topcoat", nrog rau ntsev tsuag tshuaj ntsuam lub neej ntawm ntau dua los yog sib npaug rau 5000 teev. Qib C2 muaj txheej tuab ntawm tsuas yog 120-160μm, feem ntau kub-dip galvanizing lossis electro{16}}galvanizing, nrog rau kev ntsuas ntsev ntsev lub neej tsawg dua lossis sib npaug li 1000 teev. Qib C5 yog haum rau hnyav- cov kab hauv ntug hiav txwv, siab - ntsev tsuag thiab siab - qhov chaw noo noo, uas tuaj yeem tiv taus corrosion los ntawm hiav txwv cua thiab nag acid. Qib C2 yog qhov tsim nyog rau qhov zoo tib yam - kab nrawm hauv qhuav, ntsev- thaj chaw hauv av dawb, uas tuaj yeem ua tau raws li qhov xav tau los tiv thaiv corrosion. Cov qib sib txawv ncaj qha txiav txim siab lub neej kev pab cuam ntawm lub kaw lus fastening; Lub neej kev pab cuam ntawm C5 bolts nyob rau hauv ntug dej hiav txwv ib puag ncig yog ntau tshaj 3 npaug ntawm C2 bolts.
Vim li cas thiaj yuav tsum tau C5 tiv thaiv-corrosion bolts raug xaiv rau ntug hiav txwv hnyav- cov kab es tsis txhob C3 qib?
Cov tshuaj tsuag ntsev ntsev ntawm ntug hiav txwv hnyav- cov kab tsheb loj dua lossis sib npaug li 0.5mg / m³, thiab cov av noo txhua xyoo yog ntau dua lossis sib npaug li 85%. C3 tiv thaiv-corrosion txheej muaj qhov tuab ntawm 200-250μm, nrog rau kev ntsuas ntsev ntsev lub neej ntawm 2000-3000 teev. Nyob rau hauv ib puag ncig no, cov txheej yuav tev tawm thiab cov bolts yuav xeb hauv 1-2 xyoos. Kev tiv thaiv triple ntawm C5 qib tuaj yeem cais cov tshuaj ntsev thiab dej kom zoo, txo qhov xeb ntawm cov bolts los ntawm 90%. Nyob rau tib lub sijhawm, cov bolts ntawm cov kab hnyav hnyav hnyav hnyav ua ntej, thiab xeb yuav ua rau lub zog poob ntawm bolts. C3 qib bolts muaj kev ntxhov siab corrosion tawg nyob rau hauv hnyav load, thaum C5 qib tuaj yeem ua kom lub zog ruaj khov mus ntev ntawm bolts, uas tsuas yog xaiv rau cov ntug hiav txwv hnyav-haul kab.
Dab tsi cuam tshuam rau txheej thickness sib txawv ntawm ntau tshaj ± 50μm muaj nyob rau ntawm kev tiv thaiv -corrosion kev ua tau zoo ntawm lub fastening system?
Ib txheej thickness sib txawv ntawm ± 50μm yuav ua rau kev tiv thaiv kev ncaj ncees. Cov cheeb tsam uas tsis txaus thickness yog feem ntau pitting, thiab xeb tus nqi nce 50%. Piv txwv li, yog hais tias tus tsim thickness ntawm C5 qib bolts yog 400μm, tab sis lub zos thickness tsuas yog 300μm, ntsev tsuag yuav sai sai nkag mus rau lub matrix, thiab liab xeb yuav tshwm sim tom qab 1000 teev ntawm ntsev tsuag tshuaj ntsuam. Cov thickness ntau dhau yuav ua rau txheej txheej tawg thiab tev, txo cov nyhuv tiv thaiv. Tsis tas li ntawd, qhov sib txawv yuav hloov lub torque coefficient ntawm lub ntsia liaj qhov rooj, uas ua rau preload sib txawv ntawm ntau tshaj 10%, cuam tshuam rau kev ruaj ntseg. Yog li ntawd, lub anti{12}}corrosion txheej thickness yuav tsum nruj me ntsis tswj nyob rau hauv ± 20μm ntawm tus tsim nqi.
Yuav ua li cas txhawm rau txhawm rau txhawm rau tiv thaiv - qib corrosion ntawm lub fastening system ntawm qhov chaw los txiav txim seb nws puas haum rau qhov chaw pabcuam?
Nyob rau ntawm qhov chaw, txheej txheej thickness gauge siv tau los xyuas cov txheej thickness: C5 qib yuav tsum siab tshaj los yog sib npaug zos rau 400μm, C3 qib yuav tsum yog 200-250μm, thiab C2 qib yuav tsum yog 120-160μm. Tom qab ntawd, los ntawm txoj kev tshawb nrhiav ntsev sai sai, cov qauv yog immersed hauv 5% sodium chloride tov. Qib C5 tsis muaj xeb liab rau 240 teev, C3 qib tsis muaj xeb liab rau 120 teev, thiab qib C2 tsis muaj xeb liab rau 72 teev. Nyob rau tib lub sijhawm, saib seb cov txheej txheej saum npoo puas tau tev thiab blistering; cov khoom uas muaj qhov tsis xws luag yuav tsum tau hloov. Rau cov bolts, cov txheej txheem kev ncaj ncees ntawm cov xov tuaj yeem kuaj pom, vim tias cov xov yog qhov chaw muaj kev pheej hmoo siab rau corrosion, thiab txheej yuav tsum tsis muaj kev puas tsuaj.
Dab tsi cuam tshuam cov saw hlau yuav ua tsis tiav los tiv thaiv -corrosion ntawm lub fastening system muaj nyob rau tag nrho cov kev nyab xeeb ntawm khiav?
Ua tsis tiav los tiv thaiv- corrosion yuav ua rau xeb ntawm cov ntsia hlau thiab elastic clips, nrog lub zog txo los ntawm 20%-30%. Nyob rau hauv lub tsheb ciav hlau vibration, lawv yog feem ntau ua rau tawg, ua rau rail loosening. Rust ntawm bolts yuav ua rau kom cov xov sib txhuam coefficient, accelerating preload poob thiab expanding gauge deviation. Xeb kuj tseem yuav ua rau kev ua tau zoo ntawm elastic clips, txo lawv cov clamping quab yuam thiab ua rau sab nraud ntawm txoj kev tsheb ciav hlau. Nyob rau hauv cov xwm txheej hnyav, kev tawg ntawm cov ntses phaj bolts yuav ua rau txoj kev tsheb ciav hlau sib cais, ua rau lub tsheb ciav hlau tsis sib haum xeeb. Tsis tas li ntawd, cov khoom siv xeb yuav ua rau cov pa phem rau hauv qab-rail ncoo, ua kom nws cov kev laus thiab txo qis kev vibration txo kev ua haujlwm, ua rau muaj kev nyab xeeb ntawm cov saw hlau.