Muaj ntau yam tshuaj uas ua rau lub neej yooj yim dua rau cov txiv neej niaj hnub. Ib tug ntawm lawv yog sodium formate. Cov mis rau cov tshuaj no yog HCOONa. Nws kuj tseem hu ua sodium formic acid.
cov ntaub ntawv dav dav
Sodium formate yog cov khoom lag luam tau txais thaum lub sijhawm tsim cov pentaerythritol. Cov tshuaj no feem ntau yog siv los ua tus neeg sawv cev txo qis hauv cov tshuaj organic synthesis. Kev npaj ntawm sodium formate yog txuam nrog qee yam teeb meem hauv kev ua kom huv ntawm cov tshuaj no. Yog li, nyob rau hauv cov khoom kawg yeej ib txwm ib tug me ntsis admixture ntawm pentaerythritol thiab nws derivatives. Sodium formate yog dawb los yog me ntsis greyish crystalline hmoov. Sodium formate nrog me ntsis ntsuab tint yog qee zaum pom ntawm muag. Cov impurities tam sim no tsis pom ntawm qhov muag liab qab. Nyob rau hauv cov hmoov uas mus muag, qhov loj feem ntawm cov khoom tseem ceeb yuav tsum yog tsawg kawg yog 92%. Nyob rau hauv high-zoo sodium formate, qhov tshwj xeeb nqus dej yuav tsum tsis txhob ntau tshaj 3%. Kuj tseem muaj cov piam thaj hauv cov tshuaj no. Hais txog cov piam thaj, lawv cov ntsiab lus tsis tuaj yeemtshaj 1%.
Hnub no, tsis muaj kev lag luam sib cais ntawm cov tshuaj no. Txij li thaum sodium formate yog tsim los ntawm cov khoom lag luam, nws yuav tsum tau ua tshwj xeeb ntxiv. Qee lub tuam txhab tab tom sim tsim cov tshuaj no, tab sis cov khoom lag luam zoo li no kim heev thiab tsis haum rau nws cov khoom loj.
Cov mis rau sodium formate yog HCOONa. Txij li cov tshuaj no muaj formic acid, uas yog ib tug zoo heev anti-icing neeg sawv cev, nws yog feem ntau siv raws li ib tug anti-freeze additive.
Khoom ntawm sodium formate
Tsim cov txheej txheem sodium formate yog siv hauv ntau qhov kev lag luam. Nws txoj kev siv dav yog vim nws cov khoom. Cov tshuaj no yog heev soluble nyob rau hauv dej. Nws yog me ntsis soluble hauv cawv thiab insoluble hauv ether. Sodium formate tsis hlawv thiab tawg tag. Txawm li cas los xij, nyob rau hauv qhov chaw ntawm nws qhov chaw khaws cia thiab siv, kev siv cov nplaim taws qhib tsis raug tso cai thiab txwv tsis pub haus luam yeeb.
Kev siv cov tshuaj no
Nws yog siv los ua ib qho tshuaj tiv thaiv kab mob hauv kev tsim khoom ntawm ntau lub tsev. Nws kuj tseem siv rau hauv kev lag luam tawv. Nws yog siv rau hauv ntau yam kev ua haujlwm ua ntej tanning.
Raws li cov khoom siv raw, sodium formate yog qhov tseem ceeb hauv kev tsim cov tshuaj xws li formic acid. Nws kuj yog siv rau hauv kev lag luam roj thiab ua ib feem ntawm cov tshuaj tiv thaiv icing.
Impact ontib neeg lub cev
Sodium formate, raws li nws cov qib ntawm kev cuam tshuam rau tib neeg, raug cais raws li kev phom sij 4. Nws tuaj yeem ua rau muaj mob hnyav rau lub cev hauv cov ntsiab lus siab. Sodium formate feem ntau ua rau khaus ntawm daim tawv nqaij thiab ua pa sab sauv. Thaum ua haujlwm nrog cov tshuaj no, nws yog ib qho tsim nyog yuav tsum siv cov cuab yeej tiv thaiv tus kheej: lub tshuab ua pa, lub tsho, hnab looj tes roj hmab. Thaum muaj xwm txheej nrog kev tso tawm ntau ntawm sodium formate, kev siv lub npog ntsej muag roj yog qhov yuav tsum tau ua. Txhawm rau khaws cov tshuaj no, cov tsev khaws khoom qhuav qhuav tau nruab, qhov chaw nws khaws cia rau hauv lub hnab ntawm cov pallets tshwj xeeb.
Sodium formate - antifreeze additive
Ntxiv rau kev siv hauv kev lag luam thiab kev tsim kho, cov tshuaj no nquag siv los ua cov tshuaj tiv thaiv kab mob uas muaj cov nyhuv sparing. Nws, tsis zoo li lwm hom tshuaj tiv thaiv icing, tsis muaj kev puas tsuaj rau ib puag ncig. Tsis tas li ntawd, cov hlau seem ntawm kev thauj mus los tsis raug kev txom nyem ntau dhau los ntawm nws. Nws kuj tseem tuaj yeem siv dawb rau kev kho cov qauv tsim ntawm txoj hauv kev raws li kev tiv thaiv corrosion.
Sodium formate hauv kev tsim kho
Cov tshuaj no yog qhov tseem ceeb hauv kev tsim kho cov pob zeb ua pob zeb thiab pob zeb ua vaj tse nyob rau lub caij txias. Tsis tas li ntawd, nws raug nquahu kom siv nws nyob rau ntawm huab cua kub ntawm -5˚С. Nws kuj yog siv raukev tsim cov monoliths hauv prefabricated qauv rau sealing pob qij txha, rau precast qhob khoom. Sodium formate yog nkag mus rau hauv cov pob zeb sib xyaw ua ke hauv qab no:
• 2% ntawm qhov hnyav ntawm cov cement siv, xam raws li cov tshuaj qhuav ntawm qhov chaw kub txog -5 ° C (dosage 8 kg / 7 l);
• 3% - txog -10 °C (12 kg / 10.5 l);
• 4% - txog -15 °C (16 kg / 14 l).
Thaum lub sijhawm npaj ntawm pob zeb, sodium formate yog yaj hauv dej sov. Txawm li cas los xij, muaj kev pom zoo tshwj xeeb rau kev sib tov xws li kev daws teeb meem. Yog li, nws yog ntxiv ua ke nrog sib tov dej los ntawm ib tug tshwj xeeb dispenser ntawm tshuaj additives. Koj tseem tuaj yeem siv lub tshuab nqus dej. Nyob rau hauv rooj plaub tom kawg, rau kev sib tov nws yog tsim nyog los txo nws cov kev noj los ntawm 8-13%. Ua tsaug rau sodium formate, qhob hardening yog ceev, uas yog tshwj xeeb tshaj yog tseem ceeb nyob rau hauv kev tsim kho ntawm high-sawv vaj tse.
Kev Tiv Thaiv
Cov tshuaj no yuav tsum tsis txhob siv rau hauv cov txheej txheem prestressed qhov twg steel qib AT-VI, AT-IV, A-V tau siv los txhawb. Nws kuj tseem tsis haum rau cov pob zeb thiab cov khoom siv ntxiv dag zog uas tau npaj los siv rau hauv cov pa roj thiab dej ib puag ncig nrog cov av noo ntau dua 60% thiab hauv cov qauv tsim rau kev lag luam thiab cov tsheb hluav taws xob uas siv tam sim no.
Thaum siv cov tshuaj no, nws yuav tsum nco ntsoov tias nws tseem tsis tau "kaw" ua cov tshuaj tiv thaiv kab mob, yog li tsuas yog cov ntaub ntawv hais txog nws siv,uas yog nyob rau hauv pej xeem sau thiab "Cov lus pom zoo rau kev siv ntawm kev siv sodium formate". Cov tom kawg tau pom zoo los ntawm cov kws tshaj lij commission ntawm Scientific thiab Technical Council ntawm NIISK. Ntau lub tuam txhab ntawm cov tshuaj no tsim nws raws li specifications (TS). Niaj hnub no, muaj cov khoom lag luam hauv Suav teb muag, qhov zoo ntawm qhov tsis yooj yim los kuaj xyuas, vim feem ntau tsis muaj ntawv pov thawj rau nws. Tias yog vim li cas nws yog qhov zoo dua los yuav cov tshuaj no los ntawm cov tuam txhab lag luam ntseeg siab.
