1. Hydrogen sulfide yog dab tsi
Hydrogen sulfide yog cov roj tsis muaj xim nrog lub qe rotten tsw. Nws tuaj yeem pom hauv ntau qhov chaw ntuj xws li roob hluav taws, swamps thiab qhov dej kub.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias qhov siab ntawm hydrogen sulfide tuaj yeem ua rau muaj kev phom sij. Kev raug cov roj ntau ntau tuaj yeem ua rau muaj mob ua pa thiab tuag taus. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tsum tau ceev faj txog kev nyab xeeb thaum ua haujlwm nrog lossis ib puag ncig hydrogen sulfide.
Qhuav hydrogen sulfide roj tsis muaj corrosive nyhuv, thaum ntub hydrogen sulfide roj los yog tov muaj ib tug muaj zog cracking corrosion nyhuv. Lub siab ib nrab ntawm cov nyhuv corrosion ntawm ntub hydrogen sulfide yog tsawg heev, tsuas yog 350Pa. Qhov concentration ntawm chlorine sulfide nyob rau hauv cov txheej txheem ntawm cov roj thiab roj kev loj hlob yog deb tshaj li qhov no tus nqi, yog li cov corrosion thiab puas phenomenon ntawm hlau nyob rau hauv lub hydrogen sulfide nruab nrab yog pom tseeb heev.
2. Nws corrode li cas-Hydrogen sulfide electrochemical corrosion txheej txheem
H2S muaj cov dej solubility siab, thiab sai li sai tau thaum nws yaj hauv dej, nws tam sim ntawd ionizes, ua rau cov dej acidic. Lub hydrogen ion generated los ntawm ionization yog ib tug muaj zog depolarizing tus neeg sawv cev, uas yog ib qho yooj yim mus ntes electrons nyob rau hauv lub cathode thiab txhawb lub dissolution cov tshuaj tiv thaiv ntawm cov anode hlau, uas ua rau muaj kev corrosion ntawm hlau. FeS ua los ntawm cov tshuaj tiv thaiv anode feem ntau yog txheej tiv thaiv nrog cov qauv tsis zoo, tsis zoo adhesion rau saum npoo ntawm cov hlau, yooj yim poob tawm, yooj yim rau oxidize, yooj yim rau permeated los ntawm chloride ions, thiab lub peev xwm kuj zoo. Yog li raws li cathode thiab steel matrix los ua ib qho kev ua haujlwm microbattery mus txuas ntxiv corrode lub matrix.
3. Cov khoom twg muaj kev cuam tshuam rau corrosion los ntawm hydrogen sulfide
Ib qho ntawm cov khoom siv tshaj plaws uas tuaj yeem cuam tshuam los ntawm hydrogen sulfide yog hlau. Cov hlau uas ua rau corrosion los ntawm hydrogen sulfide muaj xws li tooj liab, tooj dag, txhuas, thiab hlau. Thaum raug hydrogen sulfide, cov hlau no tuaj yeem hnov mob thiab tsim cov tebchaw uas ua rau lawv cov qauv tsis muaj zog thiab thaum kawg ua rau lwj.
Cov yas kuj tuaj yeem cuam tshuam los ntawm hydrogen sulfide. Qee hom yas, xws li PVC thiab polycarbonate, tuaj yeem ua nkig thiab tawg thaum raug hydrogen sulfide. Qhov no tuaj yeem ua rau xau thiab lwm yam kev puas tsuaj uas tuaj yeem raug nqi kho.
Ntxiv nrog rau cov hlau thiab yas, pob zeb yuav raug cuam tshuam rau corrosion los ntawm hydrogen sulfide. Cov roj tuaj yeem ua rau tsim cov sulfuric acid thaum nws reacts nrog dej uas tau permeated cov pob zeb. Qhov no tuaj yeem ua rau kev puas tsuaj ntawm cov pob zeb thiab poob ntawm cov qauv kev ncaj ncees.
4. Txiav txim siab cov nyhuv ntawm hydrogen sulfide ntawm cov khoom-hydrogen sulfide corrosion test
Hydrogen sulfide test yog ib txoj hauv kev rau kev ntsuam xyuas corrosion ntawm txheej los ntawm kev tsim cov cua nruab nrab uas muaj H2s.
Qhov kev kuaj hydrogen sulfide feem ntau yog ua nyob rau hauv chav kuaj. Cov roj H2s yog tsim ncaj qha nrog kev tswj qhov kub thiab txias, thiab tom qab ntawd sib xyaw nrog huab cua, kom cov txheej txheem ntawm cov qauv yuav ua rau cov tshuaj tiv thaiv corrosion ntawm qee qhov kub, siab, thiab concentration. Yog li, qhov corrosion kuj ntawm txheej rau hydrogen sulfide industrial cua tuaj yeem raug soj ntsuam.
Kev kuaj mob ntawm hydrogen sulfide kuaj yuav tsum tau tswj raws li hauv qab no:
Kub: 25 ° ± 2 ° C
Cov av noo: 75% ± 5%
H2s concentration: (10 ~ 15) x 10-6 (Volume ratio)
5. Hydrogen sulfide corrosion test khoom
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Qhov kub thiab txias 15 degree - 80 degree Kub Fluctuation ± 0.5 degree Kub Deviation ± 2 0 degree Humidity Range 30% ~ 98% RH Humidity Deviation ± 1% RH SO2 Concentration 25 ± 5 ppm Huab cua hloov tus nqi 3~5 /h |
LIB Noxious Gas Flow Chamber chav ua haujlwm muaj ob txheej txheej tsim. Sab hauv txheej ntawm lub studio ntawm cov khoom no yog SUS304 steel phaj, thiab txheej txheej yog ua los ntawm corrosion-resistant FRP. Qhov no tsis tsuas yog ua kom lub zog ntawm lub thawv, tab sis kuj tseem txhim kho corrosion kuj ntawm lub studio, yog li ua rau lub neej ntawm lub tshuab.
