Cov yam tseem ceeb uas cuam tshuam rau cov txiaj ntsig ntawm kev ntsuas ntsev ntsev muaj xws li: ntsuas kub thiab av noo, ntsev tov concentration, coj mus kuaj lub kaum sab xis, pH tus nqi ntawm ntsev tov, ntsev tsuag tshuaj tsw qab thiab txoj kev tshuaj tsuag.
- Ntsuas kub thiab av noo
Kub thiab txheeb ze humidity cuam tshuam rau corrosion ntawm ntsev tsuag. Qhov tseem ceeb txheeb ze av noo rau hlau corrosion yog li ntawm 70%. Thaum tus txheeb ze av noo mus txog los yog tshaj qhov tseem ceeb humidity, cov ntsev yuav deliquesce los ua ib tug electrolyte nrog zoo hluav taws xob conductivity. Thaum tus txheeb ze cov av qis, qhov concentration ntawm ntsev tov yuav nce mus txog rau thaum crystalline ntsev yog precipitated, thiab tus nqi corrosion yuav txo raws li.
Qhov siab dua qhov ntsuas kub, qhov nrawm dua qhov corrosion ntawm ntsev tsuag. Lub koom haum thoob ntiaj teb electrotechnical Commission IEC60355: 1971 "Kev APPRAISALOFTHE cov teeb meem ntawm Kev Tshawb Fawb Kev Tshawb Fawb Txog Kev Tshawb Fawb" tus qauv taw qhia: "Rau txhua txhua 10 degree qhov kub thiab txias, tus nqi corrosion yog nce los ntawm 2 mus rau 3 zaug, thiab cov conductivity ntawm electrolyte yog nce ntxiv. 10 mus rau 20%. " Qhov no yog vim qhov kub thiab txias nce, lub zog molecular nce, thiab cov tshuaj lom neeg cov tshuaj tiv thaiv nrawm dua li qhov tshwm sim. Rau qhov ntsuas nruab nrab ntsev tsuag, feem ntau cov kws tshawb fawb ntseeg tias qhov ntsuas kub yog qhov tsim nyog dua ntawm 35 degree. Yog tias qhov ntsuas kub siab dhau lawm, cov ntsev tsuag tshuaj tiv thaiv corrosion txawv ntawm qhov xwm txheej tiag tiag.
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Qhov concentration ntawm ntsev tov
Cov nyhuv ntawm qhov concentration ntawm ntsev tov ntawm tus nqi corrosion yog cuam tshuam nrog rau hom khoom thiab txheej. Thaum cov concentration qis dua 5%, qhov corrosion ntawm cov hlau, npib tsib xee thiab tooj dag nce nrog kev nce siab. Thaum cov concentration ntau dua 5%, tus nqi corrosion ntawm cov hlau no txo qis nrog qhov nce ntawm cov concentration. Qhov tshwm sim saum toj no tuaj yeem piav qhia los ntawm cov ntsiab lus oxygen hauv cov ntsev ntsev, uas cuam tshuam nrog cov concentration ntawm ntsev. Nyob rau hauv qhov tsawg concentration ntau, cov ntsiab lus oxygen nce nrog ntsev concentration, tab sis thaum cov ntsev concentration nce mus rau 5%, cov pa oxygen mus txog qhov txheeb ze saturation, thiab yog hais tias cov ntsev concentration tseem nce ntxiv, cov ntsiab lus oxygen txo raws li. Nrog rau qhov txo qis ntawm cov ntsiab lus oxygen, lub peev xwm depolarization ntawm oxygen kuj txo qis, uas yog, cov nyhuv corrosion tsis muaj zog. Txawm li cas los xij, rau zinc, cadmium, tooj liab thiab lwm yam hlau, tus nqi corrosion ib txwm nce nrog qhov nce ntawm qhov concentration ntawm ntsev tov.
- Sample placement Angle
Lub kaum sab xis ntawm tus qauv muaj qhov cuam tshuam rau qhov tshwm sim ntawm kev ntsuas ntsev tsuag. Cov kev taw qhia sedimentation ntawm cov tshuaj tsuag ntsev yog ze rau txoj kev ntsug. Thaum cov qauv muab tso rau kab rov tav, nws qhov projection cheeb tsam yog qhov loj tshaj plaws, thiab cov tshuaj ntsev ntsev ntawm cov qauv saum npoo kuj yog qhov loj tshaj plaws, yog li qhov corrosion yog qhov loj tshaj plaws. Cov txiaj ntsig tau pom tias qhov kev poob qis hauv ib square meter yog 250g thaum lub phaj hlau yog nyob ntawm 45 degree Lub kaum sab xis rau kab rov tav, thiab 140g ib square meter thaum lub phaj hlau yog sib npaug rau kab ntsug. GB/T2423.17-93 tus qauv tau hais tias "txoj kev tso cov qauv tiaj tus yuav tsum zoo li qhov kev sim saum npoo yuav tsum nyob ntawm 30 degree Lub kaum sab xis mus rau ntsug."
- Lub pH ntawm ntsev tov
Tus nqi pH ntawm cov ntsev ntsev yog ib qho ntawm cov ntsiab lus tseem ceeb cuam tshuam rau qhov tshwm sim ntawm kev ntsuas ntsev ntsev. Qhov qis dua tus nqi pH, qhov siab dua qhov concentration ntawm hydrogen ions hauv cov tshuaj, qhov muaj zog acidity thiab muaj zog corrosion. Kev ntsuam xyuas ntsev ntsev ntawm electroplated qhov chaw xws li Fe/Zn, Fe/Cd, Fe/Cu/Ni/Cr qhia tias corrosion ntawm acetate spray test (ASS) nrog rau ntsev pH ntawm 3.0 yog 1.5 txog 2. Vim yog qhov cuam tshuam ntawm ib puag ncig, pH tus nqi ntawm cov ntsev ntsev yuav hloov.
- Ntsev tshuaj tsuag qhov nyiaj thiab txau txoj kev
Qhov zoo dua cov tshuaj tsuag ntsev yog, qhov loj dua ntawm thaj chaw lawv tsim, cov pa oxygen ntau dua lawv adsorb, thiab ntau corrosive lawv. Ntau tshaj 90% ntawm cov tshuaj tsuag ntsev hauv cov xwm txheej tsawg dua 1 micron inch. Cov txiaj ntsig kev tshawb fawb pom tau hais tias cov pa oxygen adsorbed rau ntawm qhov chaw ntawm cov tshuaj ntsev ntsev nrog ib txoj kab uas hla ntawm 1 micron yog qhov sib npaug nrog cov pa oxygen hauv cov khoom. Txawm hais tias me me npaum li cas cov tshuaj tsuag ntsev me me, cov pa oxygen adsorbed yuav tsis nce ntxiv lawm.
Qhov tsis zoo tshaj plaws ntawm txoj kev tshuaj tsuag ib txwm muaj, suav nrog txoj kev txhaj tshuaj pneumatic thiab txoj kev tshuaj tsuag ntauwd, yog qhov tsis zoo ntawm cov ntsev tsuag tshuaj tsw qab thiab qhov loj ntawm cov ntsev tsuag cov khoom. Txoj kev ultrasonic atomization siv lub hauv paus ntsiab lus ntawm ultrasonic atomization rau atomize ntsev tov ncaj qha mus rau hauv cov ntsev tsuag thiab diffuses nws mus rau hauv lub xeem cheeb tsam, uas yuav daws tau qhov teeb meem ntawm cov tsis zoo uniformity ntawm ntsev tsuag daws, thiab cov ntsev tsuag particle txoj kab uas hla yog me me. Cov txheej txheem tshuaj tsuag sib txawv kuj muaj qhov cuam tshuam rau pH ntawm cov tshuaj ntsev.
Txoj kev ultrasonic atomization yam tsis muaj cua compressed muaj me ntsis cuam tshuam rau pH nqi ntawm ntsev tov, tab sis lub siab txhaj tshuaj thiab tshuaj tsuag ntauwd txoj kev ntawm compressed cua tsuag muaj kev hloov pauv hauv pH nqi ntawm ntsev tov.
