Singleton Salt Spray Chamber

Thaum peb tham txog kev kuaj ntsev ntsev, peb yuav xav txogSingleton Salt Spray Chamber, uas tuaj yeem simulate corrosive ib puag ncig thiab kuaj qhov corrosion kuj thiab kev ntseeg siab ntawm cov khoom.

Kev ntsuam xyuas ntsev tsuag yog muab faib ua 4 hom:
● Neutral ntsev tsuag tshuaj ntsuam (NSS);
● Acetic acid ntsev tshuaj tsuag (AASS);
● Copper accelerated acetic acid ntsev tshuaj tsuag (CASS);
● Alternating ntsev tsuag tshuaj ntsuam.

Thiab Artificial simulated ntsev tsuag kuaj muaj xws li:
Neutral salt spray test (NSS), acetate spray test (ASS), copper salt accelerated acetate spray test (CASS), alternating salt spray test.

Feem ntau corrosion ntawm cov ntaub ntawv hlau tshwm sim nyob rau hauv atmospheric ib puag ncig, uas muaj corrosive Cheebtsam thiab yam xws li oxygen, av noo, kub hloov thiab pa phem.

Ntsev tshuaj tsuag corrosion yog ib qho tshwm sim thiab feem ntau puas atmospheric corrosion.

Kev xeb ntawm cov khoom siv hlau los ntawm cov tshuaj tsuag ntsev feem ntau yog tshwm sim los ntawm cov tshuaj tiv thaiv electrochemical ntawm cov tshuaj ntsev ntsev nkag mus rau hauv cov hlau, ua rau "tsawg muaj peev xwm hlau-electrolyte tov-siab muaj peev xwm impurity" micro-battery system, electron hloov tshwm sim, thiab cov hlau. raws li lub anode dissolves los tsim ib tug tshiab compound, piv txwv li, cov khoom corrosive.
Lub luag haujlwm tseem ceeb hauv cov txheej txheem ntsev tsuag corrosion yog ua los ntawm chloride ions, uas muaj peev xwm nkag mus tau yooj yim thiab tuaj yeem nkag mus tau yooj yim ntawm cov hlau oxide txheej rau hauv cov hlau, rhuav tshem lub xeev passive ntawm cov hlau. Nyob rau tib lub sijhawm, chloride ions muaj lub zog me me hydration thiab yooj yim adsorbed ntawm cov hlau nto, hloov cov pa oxygen hauv txheej oxide uas tiv thaiv cov hlau, ua rau cov hlau puas.

Cov tshuaj tsuag ntsev ntsev yog ib qho kev ntsuas kev tiv thaiv kev tiv thaiv kom nrawm dua hauv cov cua. Nws yog atomize dej ntsev ntawm ib tug tej yam concentration; Tom qab ntawd muab tshuaj tsuag rau hauv lub thawv kaw qhov kub tsis tu ncua, thiab cuam tshuam txog kev tiv thaiv corrosion ntawm cov qauv kuaj los ntawm kev soj ntsuam cov kev hloov pauv ntawm cov qauv kuaj tom qab muab tso rau hauv lub thawv rau lub sijhawm. Nws yog ib txoj kev xeem ceev. Cov ntsev concentration ntawm chloride nyob rau hauv cov tshuaj tsuag ntsev ib puag ncig yuav ua tau ob peb zaug los yog kaum ob lub sij hawm ntawm cov ntsev tsuag cov ntsiab lus nyob rau hauv lub ntuj puag ncig, uas zoo heev tsub kom tus nqi corrosion. Lub sijhawm kom tau txais cov txiaj ntsig ntawm kev ntsuas ntsev ntsev ntawm cov khoom kuj tseem luv heev.

Kev ntsuam xyuas cov khoom lag luam hauv ib puag ncig ntuj yuav siv sijhawm ib xyoos lossis ntau xyoo txhawm rau txhawm rau corrode, tab sis kev sim nyob rau hauv ib qho kev simulated ntsev tsuag ib puag ncig tsuas yog siv ob peb hnub lossis ntau teev kom tau txais cov txiaj ntsig zoo sib xws.

1. ntsuas kub thiab av noo
Qhov tseem ceeb txheeb ze av noo rau hlau corrosion yog li ntawm 70%. Thaum tus txheeb ze av humidity mus txog los yog tshaj qhov tseem ceeb humidity, cov ntsev yuav deliquesce thiab tsim ib tug electrolyte nrog zoo conductivity.
Thaum cov txheeb ze av qis, qhov concentration ntawm cov ntsev ntsev yuav nce mus txog thaum crystalline ntsev yog precipitated, thiab tus nqi corrosion yuav txo raws li. Raws li qhov kub thiab txias, cov molecular motion intensifies, thiab corrosion tus nqi ntawm high ntsev tsuag nce.
Lub International Electrotechnical Commission taw qhia tias rau txhua txhua 10 degree nce nyob rau hauv qhov kub thiab txias, tus nqi corrosion nce 2 mus rau 3 zaug, thiab cov conductivity ntawm electrolyte nce 10 mus rau 20%. Rau kev ntsuas nruab nrab ntsev tsuag, feem ntau ntseeg tau tias qhov ntsuas kub yog qhov tsim nyog ntawm 35 degree.

2. Tshuaj concentration
● Thaum cov concentration qis dua 5%, qhov corrosion ntawm cov hlau, npib tsib xee, thiab tooj dag nce nrog kev nce hauv concentration;
● Thaum cov concentration ntau dua 5%, qhov corrosion ntawm cov hlau no txo ​​qis nrog qhov nce hauv concentration.
Qhov no yog vim hais tias, nyob rau hauv tsawg concentration ntau, cov ntsiab lus ntawm cov pa oxygen nce nrog nce nyob rau hauv ntsev concentration; Thaum cov ntsev concentration nce mus rau 5%, cov ntsiab lus ntawm cov pa oxygen mus txog qhov txheeb ze saturation, thiab yog tias cov ntsev concentration tseem nce ntxiv, cov ntsiab lus ntawm cov pa oxygen yuav txo qis.
Raws li cov ntsiab lus ntawm cov pa oxygen txo, lub peev xwm depolarization ntawm oxygen kuj txo, uas yog, cov nyhuv corrosion tsis muaj zog.
Rau cov hlau xws li zinc, cadmium, thiab tooj liab, tus nqi corrosion ib txwm nce nrog kev nce siab ntawm cov ntsev ntsev.

3. Qauv tso lub kaum sab xis
Cov kev taw qhia ntawm ntsev tsuag tshuaj tsw qab yog nyob ze rau ntawm 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 yog qhov loj tshaj plaws, yog li qhov corrosion yog qhov loj tshaj plaws.
Cov txiaj ntsig kev tshawb fawb pom tau tias thaum lub phaj hlau nyob ntawm 45-degree kaum rau kab kab rov tav, qhov corrosion poob ntawm ib square meter yog 250g, thiab thaum lub dav hlau phaj steel yog sib npaug rau kab ntsug, qhov hnyav corrosion. poob yog 140g ib square meter.
GB/T 2423.

4. tus nqi pH
Qhov qis dua tus nqi pH, qhov siab dua cov hydrogen ion concentration hauv cov tshuaj, thiab cov acidity muaj zog dua, qhov muaj zog corrosion.
Tus nqi pH ntawm qhov nruab nrab ntsev tsuag tshuaj ntsuam (NSS) yog 6.5 ~ 7.2. Vim muaj kev cuam tshuam ntawm ib puag ncig, pH tus nqi ntawm cov ntsev tov yuav hloov.
Vim li no, cov qauv ntsuas tshuaj ntsev hauv tsev thiab txawv teb chaws tau teev cov pH nqi ntau ntawm cov tshuaj ntsev ntsev, thiab tau npaj txoj hauv kev los txhim kho pH tus nqi ntawm cov ntsev ntsev thaum lub sij hawm sim los txhim kho qhov rov ua dua ntawm cov ntsev tsuag tshuaj ntsuam xyuas.

5. Cov tshuaj tsuag ntsev tso tawm thiab txau txoj kev
Qhov zoo dua cov ntsev tsuag cov khoom, qhov loj ntawm qhov chaw tsim, cov pa oxygen ntau dua, thiab qhov corrosive ntau dua.
Cov txheej txheem tshuaj tsuag ib txwm muaj xws li kev siv cua siab txau thiab txau ntau txoj hauv kev. Qhov tsis zoo tshaj plaws yog qhov sib xws ntawm cov tshuaj tsuag ntsev tso tawm tsis zoo thiab txoj kab uas hla ntawm cov tshuaj ntsev ntsev yog qhov loj.
Cov txheej txheem txau sib txawv kuj tseem yuav cuam tshuam rau pH tus nqi ntawm cov tshuaj ntsev.

Kev ntsuam xyuas ntsevtau muab faib ua ob pawg: ib qho yog qhov kev ntsuam xyuas ib puag ncig ntuj, thiab lwm qhov yog cov khoom siv hluav taws xob nrawm simulated ntsev tsuag ib puag ncig kuaj.
Kev simulated ntsev tsuag ib puag ncig kev sim siv cov cuab yeej sim nrog qee qhov chaw ntim - Singleton Salt Spray Chamber, los tsim kom muaj ntsev tsuag ib puag ncig hauv nws qhov chaw ntim los ntawm cov txuj ci dag los ntsuas cov ntsev tsuag tshuaj tiv thaiv ntawm cov khoom.
Piv nrog rau tej yam ntuj tso ib puag ncig, ntsev concentration ntawm chloride nyob rau hauv nws cov 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 thiab heev shortens lub sij hawm kom tau txais cov txiaj ntsig ntawm cov khoom ntsev tsuag tshuaj ntsuam.
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 nyob rau hauv ib qho kev simulated ntsev tsuag ib puag ncig, nws tsuas yog siv sijhawm 24 teev kom tau txais cov txiaj ntsig zoo sib xws.
Kev simulated ntsev tsuag tshuaj muaj xws li: nruab nrab ntsev tsuag tshuaj ntsuam, acetate spray test, tooj liab ntsev accelerated acetate spray test, thiab alternating ntsev tshuaj tsuag.

(1) Neutral ntsev tsuag test (NSS test)
Nws yog qhov ntxov tshaj plaws kev ntsuas kev tiv thaiv corrosion nrog rau daim ntawv thov dav tshaj plaws. Nws siv 5% sodium chloride ntsev tov nrog tus nqi pH hloov mus rau qhov nruab nrab (6-7) ua tshuaj tsuag. Qhov ntsuas kub yog 35 degree, thiab cov ntsev tsuag cov tshuaj tsw qab yuav tsum nyob nruab nrab ntawm 1 thiab 2 ml / 80 cm².h.

(2) Acetic acid ntsev tshuaj tsuag (ASS test)
Nws yog tsim los ntawm lub hauv paus ntawm nruab nrab ntsev tsuag tshuaj ntsuam. Nws yog ntxiv ib co glacial acetic acid rau 5% sodium chloride tov kom txo cov pH nqi ntawm cov tshuaj mus txog 3, kom cov tshuaj ua acidic, thiab cov ntsev tsuag tsim thaum kawg kuj hloov los ntawm nruab nrab ntsev tsuag rau acidic. Nws tus nqi corrosion yog kwv yees li 3 npaug sai dua li ntawm NSS xeem.

(3) Copper ntsev accelerated acetic acid ntsev tshuaj tsuag (CASS test)
Nws yog ib qho kev ntsuas ceev ntsev tsuag corrosion tsis ntev los no tau tsim tawm txawv teb chaws. Qhov ntsuas kub yog 50 degree. Ib qho me me ntawm tooj liab ntsev-tooj ​​liab chloride yog ntxiv rau cov ntsev ntsev kom muaj zog ua kom muaj zog. Nws tus nqi corrosion yog li ntawm 8 npaug ntawm NSS xeem.

Hauv kev xaus, lub sijhawm hloov pauv tshwj xeeb yog:

Neutral ntsev tsuag tshuaj ntsuam 24h ⇌ ib puag ncig ntuj 1 xyoo

Acetic acid ntsev tsuag kuaj 24h ⇌ ib puag ncig ntuj 3 xyoos

Copper ntsev accelerated acetic acid ntsev tsuag tshuaj ntsuam 24h ⇌ ib puag ncig ntuj 8 xyoo

Cim npe nrov: Singleton Salt Spray Chamber, Tuam Tshoj, lwm tus neeg, manufacturers, hoobkas, yuav, pheej yig