Pogo Pin Salt Spray Corrosion Txoj Cai
Koj puas paub ntev npaum li cas cov tshuaj tsuag ntsev sib npaug rau ib puag ncig ntuj rau ib teev?
Feem ntau ntawm corrosion ntawm cov ntaub ntawv hlau tshwm sim nyob rau hauv atmospheric ib puag ncig vim hais tias cov huab cua muaj corrosive Cheebtsam xws li oxygen thiab pa phem, raws li zoo raws li corrosive yam xws li av noo thiab kub hloov. Ntsev tshuaj tsuag corrosion yog ib qho tshwm sim thiab feem ntau puas atmospheric corrosion.
Txoj cai ntawm ntsev tsuag corrosion
Kev xeb ntawm cov ntaub ntawv hlau los ntawm cov tshuaj tsuag ntsev yog feem ntau yog vim kev nkag mus ntawm cov tshuaj ntsev ntsev rau hauv cov hlau kom nkag mus rau cov tshuaj tiv thaiv electrochemical, ua rau "tsis muaj peev xwm hlau-electrolyte tov-siab muaj peev xwm impurity" micro- roj teeb system, hloov hluav taws xob tshwm sim, thiab hlau raws li lub anode dissolves. Tsim cov khoom sib txuas tshiab hu ua cov khoom siv corrosion. chloride ions ua lub luag haujlwm tseem ceeb hauv cov txheej txheem ntawm cov ntsev tsuag tshuaj tiv thaiv kev puas tsuaj, uas muaj peev xwm nkag mus tau yooj yim thiab tuaj yeem nkag mus rau hauv cov hlau oxide txheej hauv cov hlau sab hauv, rhuav tshem lub xeev passive ntawm cov hlau; Nyob rau tib lub sijhawm, chloride ions muaj lub zog me me hydration, Nws yog ib qho yooj yim rau adsorbed ntawm cov hlau nto, hloov cov pa oxygen hauv txheej oxide uas tiv thaiv cov hlau, thiab ua rau cov hlau puas.
Ntsev tshuaj tsuag corrosion xeem txoj kev thiab kev faib tawm
Kev ntsuas ntsev ntsev yog ib qho kev ntsuam xyuas kev tiv thaiv kev tiv thaiv kom nrawm ntawm qhov chaw tsim khoom. Nws atomizes ib qho concentration ntawm ntsev dej; tom qab ntawd muab tshuaj tsuag rau hauv lub thawv kaw thermostatic, thiab qhia txog kev tiv thaiv corrosion ntawm cov qauv kuaj los ntawm kev soj ntsuam cov kev hloov ntawm cov qauv kuaj tom qab nws muab tso rau hauv lub thawv rau ib lub sijhawm. Nws yog ib txoj kev sim ceev ceev, ntsev concentration ntawm chloride nyob rau hauv lub ntsev tsuag ib puag ncig yog ob peb zaug los yog kaum ob lub sij hawm ntawm lub ntuj puag ncig ntsev tsuag cov ntsiab lus, uas zoo heev tsub kom tus nqi corrosion, thiab ntsev tsuag tshuaj ntsuam ntawm cov khoom shortens. lub sijhawm kom tau txais qhov tshwm sim.
Tej zaum nws yuav siv sij hawm ib xyoos lossis ntau xyoo los sim cov qauv khoom hauv ib puag ncig ntuj, tab sis cov txiaj ntsig zoo sib xws tuaj yeem tau txais ob peb hnub lossis txawm tias teev nyob rau hauv ib qho chaw simulated ntsev tsuag ib puag ncig.
Muaj plaub yam tseem ceeb ntawm kev ntsuam xyuas ntsev tsuag:
① Neutral ntsev tsuag tshuaj ntsuam (NSS)
② Acetic ntsev tsuag tshuaj ntsuam (AASS)
③ Copper Accelerated Acetic Salt Spray Test (CASS)
④ Alternating ntsev tsuag kuaj
Cov khoom siv ntsev tsuag tshuaj tiv thaiv corrosion
Ntev npaum li cas yog ib teev ntawm cov tshuaj tsuag ntsev sib npaug rau ib puag ncig ntuj?
Cov tshuaj tsuag ntsev tau muab faib ua ob pawg: kev sim tshuaj ib puag ncig ntuj thiab cov khoom siv hluav taws xob nrawm nrawm simulated ntsev tsuag ib puag ncig kuaj.
Kev simulation ntsev tsuag ib puag ncig kev sim yog siv cov cuab yeej ntsuas nrog qee qhov chaw ntim - cov ntsev tsuag tshuaj tua kab, thiab siv cov txuj ci dag hauv nws qhov chaw ntim los tsim cov ntsev tsuag ib puag ncig los ntsuas qhov zoo ntawm cov khoom siv ntsev tsuag corrosion kuj. . Piv nrog rau tej yam ntuj tso ib puag ncig, ntsev concentration ntawm chloride nyob rau hauv lub ntsev tsuag ib puag ncig yuav ua tau ob peb zaug los yog kaum ob lub sij hawm ntawm lub ntuj puag ncig ntsev tshuaj tsuag cov ntsiab lus, uas zoo heev tsub kom tus nqi corrosion. Kev kuaj ntsev ntsev yog ua tiav ntawm cov khoom thiab cov txiaj ntsig tau txais. Lub sij hawm kuj luv heev. Piv txwv li, yog tias cov qauv khoom raug kuaj nyob rau hauv ib puag ncig raug, nws yuav siv sij hawm 1 xyoos rau nws kom corrode, tab sis nws tsuas yog siv 24 teev kom tau txais cov txiaj ntsig zoo sib xws hauv ib puag ncig kev simulated ntsev tsuag.
Qhov kev sim simulated ntsev tsuag tshuaj muaj xws li kev sim tshuaj ntsev nruab nrab, acetic acid ntsev tshuaj tsuag, tooj liab ntsev nrawm nrawm acetic acid ntsev tshuaj tsuag, thiab alternating ntsev tshuaj tsuag.
(1) Neutral ntsev tsuag tshuaj ntsuam (NSS test) yog qhov ntxov tshaj plaws thiab feem ntau dav siv ceev kev kuaj corrosion. Nws siv 5 feem pua sodium chloride saline tov, thiab pH tus nqi ntawm cov tshuaj yog kho nyob rau hauv nruab nrab ntau yam (6-7) raws li ib tug tov rau tshuaj tsuag. Qhov ntsuas kub yog 35 degree, thiab qhov sedimentation ntawm ntsev pos huab yuav tsum nyob nruab nrab ntawm 1 thiab 2ml / 80cm².h.
(2) Kev kuaj tshuaj acetic acid ntsev (ASS test) yog tsim los ntawm kev kuaj tshuaj ntsev nruab nrab. Nws yog ntxiv ib co glacial acetic acid rau 5 feem pua sodium chloride tov kom cov pH nqi ntawm cov tshuaj txo mus txog 3, cov tshuaj yuav acidic, thiab cov ntsev zaum kawg kuj hloov los ntawm nruab nrab ntsev tsuag rau acidic. Nws tus nqi corrosion yog kwv yees li 3 zaug sai dua li ntawm NSS xeem.
(3) Copper ntsev accelerated acetic acid ntsev tsuag tshuaj ntsuam (CASS test) yog ib tug ceev ceev ntsev tsuag corrosion test nyuam qhuav tsim tawm txawv teb chaws. Qhov ntsuas kub yog 50 degree. corrosion. Nws tus nqi corrosion yog li ntawm 8 npaug ntawm NSS xeem.
Nyob rau hauv ib puag ncig ib puag ncig, koj tuaj yeem hais txog lub sijhawm hloov pauv cov qauv hauv qab no:
Neutral ntsev tsuag tshuaj ntsuam 24h ⇌ ib puag ncig ntuj 1 xyoo
Acetate ntsev tsuag kuaj 24h ⇌ ib puag ncig ntuj rau 3 xyoos
Copper ntsev accelerated acetate ntsev tsuag tshuaj ntsuam 24h ⇌ ib puag ncig ntuj rau 8 xyoo
