Corrosion yog kev puas tsuaj los yog deterioration ntawmcov ntaub ntawvlos yog lawv cov khoom tsim los ntawm ib puag ncig.

1. Feem ntau corrosion tshwm sim vim muaj cov khoom tshwj xeeb hauvthaj chaw atmospheric.Cov huab cua yog tsim los ntawm corrosive Cheebtsam thiab corrosive yam xws li oxygen, av noo, kub hloov pauv thiab cov pa phem.

Cov ntsev tsuag tshuaj tiv thaiv corrosion yog ib qho qauv thiab siv dav hauv ntau yam kev lag luam.Cov tshuaj tsuag ntsev hais ntawm no yog hais txog qhov chaw tsim khoom ntawm chloride.Nws lub ntsiab corrosive tivthaiv yog chloride ntsev xws li uas muaj nyob rau hauv sodium chloride, uas yog los ntawm dej hiav txwv thiab inland saline-alkali cheeb tsam.

Kev xeb uas tshwm sim ntawm cov hlau saum npoo yog qhov tshwm sim ntawm cov tshuaj tiv thaiv electrochemical ntawm cov tshuaj chloride ion uas muaj nyob rau hauv oxide txheej ntawm cov hlau nto thiab cov txheej tiv thaiv thiab cov hlau sab hauv.Nyob rau tib lub sijhawm, chloride ions muaj qee qhov dej ntawm lub zog, uas tuaj yeem nqus tau yooj yim los ntawm lub qhov hws thiab cov kab nrib pleb ntawm cov hlau kom tshem tawm thiab / lossis hloov cov pa oxygen hauv txheej chlorinated, tig insoluble oxides rau hauv cov chlorides soluble, thiab converting lub passivated nto mus rau hauv ib tug active nto.Lub hom phiaj ntawm qhov kev sim no yog kom nkag siab ntev npaum li cas cov khoom nws tus kheej tuaj yeem tiv taus cov kev tsis zoo no thaum siv dav dav.

2. Cov tshuaj ntsev tsuag tshuaj tiv thaiv corrosion thiab nws daim ntawv thov tiag tiag

Cov tshuaj tsuag ntsev yog ib qho kev sim ib puag ncig uas feem ntau siv cov tshuaj tua kab mob ntsev tsuag ib puag ncig los ntsuas qhov kev tiv thaiv corrosion ntawm cov khoom lossis cov khoom siv hlau.

Nws muab faib ua ob pawg;ib qho yog qhov kev ntsuam xyuas ib puag ncig ntuj, thiab lwm qhov yog qhov simulated ntsev tsuag ib puag ncig kuaj.Kev simulated ntsev tsuag ib puag ncig kev sim siv cov tshuaj ntsev tsuag tshuaj ntsuam xyuas cov khoom muaj peev xwm tiv thaiv corrosion.

Piv nrog rau cov khoom uas feem ntau pom nyob rau hauv ib puag ncig ntuj, cov tshuaj chloride concentration ntawm cov ntsev tsuag tuaj yeem ua rau ntau mus rau ob zaug siab dua.Qhov no zoo heev accelerates tus nqi corrosion.Piv txwv li, yog tias cov qauv khoom raug kuaj nyob rau hauv ib puag ncig raug, nws yuav siv sij hawm ntev txog ib xyoos kom corrode, whereas cov khoom simulated tuaj yeem tsim cov teebmeem zoo sib xws hauv 24 teev xwb.

Cov kev sim simulated ntsev tsuag tshuaj muaj xws li qhov nruab nrab ntsev tsuag tshuaj ntsuam, acetic acid ntsev tshuaj tsuag, tooj liab ntsev accelerated acetic acid ntsev tshuaj tsuag, thiab ib qho alternating ntsev tshuaj tsuag.

A. Qhov nruab nrab ntsev tsuag tshuaj ntsuam (NSS test) yog ib qho ntawm txoj kev qub tshaj plaws rau kev ntsuam xyuas corrosion thiab txaus siab rau daim ntawv thov dav tshaj plaws.Nws siv 5% sodium chloride ntsev aqueous tov, nrog tus nqi pH hloov mus rau qhov nruab nrab (6-7).Qhov ntsuas kub yog 35 ℃, thiab tus nqi sedimentation ntawm cov ntsev tsuag yuav tsum nyob nruab nrab ntawm 1 ~ 2ml / 80cm².h.

B. Kev kuaj tshuaj acetic acid ntsev (ASS test) yog tsim los ntawm kev kuaj tshuaj ntsev nruab nrab.Nws ntxiv ib co glacial acetic acid rau 5% sodium chloride tov kom txo cov pH nqi ntawm cov tshuaj mus txog 3. Thaum ua li ntawd cov tshuaj yuav acidic, thiab ntsev pos uas tau tsim lem ntawm nruab nrab ntsev pos huab mus acid.Nws tus nqi corrosion yog kwv yees li 3 npaug sai dua qhov kev sim NSS.

C. Cov ntsev tooj liab nrawm nrawm acetic acid ntsev tshuaj ntsuam (CASS test) yog cov ntsev ntsev ntsev sai sai tau tsim tawm txawv teb chaws.Qhov ntsuas kub yog 50 ℃.Ib qho me me ntawm tooj liab ntsev, tooj liab chloride yog ntxiv rau cov ntsev ntsev kom muaj zog ua kom muaj kev xeb.Nws tus nqi corrosion yog kwv yees li 8 npaug ntawm NSS xeem.

D. Kev ntsuas tshuaj ntsev alternating yog ib qho kev ntsuam xyuas ntsev tsuag.Nws yog tsim los ntawm qhov nruab nrab ntsev tsuag tshuaj ntsuam nyob rau hauv ib tug ntsev tsuag corrosion kuaj chamber ntxiv rau ib tug tas li damp cua sov kuaj.Nws yog tsuas yog siv rau kab noj hniav hom ua tiav cov khoom.Raws li qhov tshwm sim ntawm qhov chaw ntub dej tsim thoob plaws qhov kev sim, cov tshuaj tsuag ntsev tuaj yeem nkag mus los ntawm qhov chaw mus rau hauv cov txheej txheem tob ntawm cov khoom.Lub hom phiaj ntawm kev sib hloov ntawm ob qhov kev sim ib puag ncig (cov tshuaj tsuag ntsev thiab dej kub) yog txhawm rau txhim kho qhov tseeb uas ib tus tuaj yeem txiav txim siab txog hluav taws xob thiab khoom siv hluav taws xob ntawm ib qho khoom muab.

Peb cov tshuaj tsuag ntsev yog ua raws li tus qauv GJB548B, txoj kev 1009, thiab nws cov khoom tseem ceeb yog: qhov concentration ntawm cov ntsev ntsev yuav tsum yog 0.5% ~ 3.0% (feem pua ​​​​ntawm qhov hnyav) ntawm cov dej deionized lossis dej distilled.Cov ntsev siv yuav tsum yog sodium chloride.Thaum ntsuas ntawm (35 ± 3) ℃, pH tus nqi ntawm cov ntsev ntsev yuav tsum nyob nruab nrab ntawm 6.5 thiab 7.2.Tsuas yog cov tshuaj ntshiab hydrochloric acid lossis sodium hydroxide (dilute tov) tuaj yeem siv los kho pH.Txhawm rau simulate txoj kev nrawm nrawm ntawm qhov chaw dej hiav txwv, qhov ntev ntawm nws lub sijhawm ua haujlwm txiav txim siab nws lub peev xwm los tiv thaiv corrosion.

3. Cov lus xaus

Nrog txoj kev loj hlob ntawmintegrated circuit hlau pob, cov kev ntsuam xyuas ntawm ib puag ncig adaptability tau dhau los ua ntau dua thiab meej.Cov ntsev tsuag tshuaj tiv thaiv corrosion yog cov txheej txheem tseem ceeb rau kev soj ntsuam ib puag ncig corrosion ntawm cov khoom.Yog li ntawd, kev txhim kho corrosive kuj ntawm hlau ntim tau dhau los ua ib qho tseem ceeb ntawm txoj kev tsim khoom.Los ntawm kev tshawb fawb, peb lub tuam txhab siv zog los daws qhov teeb meem ntawm corrosion los ntawm cov txheej txheem ntawm kev kho cua sov, kub sealing txheej txheem, electroplating txheej txheem thiab lwm yam txheej txheem ntawm kev ua hlau cov ntaub ntawv.Txoj kev no peb tuaj yeem txhim kho kev txhim kho corrosion tag nrho ntawm cov pob hlau thiab ua tau raws li qhov xav tau ntawm cov neeg siv khoom siv rau cov khoom siv no.