Muaj pes tsawg leeg ntawm antifreeze thiab nws cov khoom
Txheem
General piav qhia thiab cov khoom
Qhov zoo muaj pes tsawg leeg ntawm antifreeze tsis txawv los ntawm txawv teb chaws analogues. Qhov sib txawv tsuas yog nyob rau hauv feem pua ntawm cov khoom. Lub hauv paus coolant muaj cov dej distilled los yog deionized, ethanediol los yog propanediol alcohols, anti-corrosion additives thiab dye. Tsis tas li ntawd, ib qho tsis muaj reagent (sodium hydroxide, benzotriazole) thiab defoamer, polymethylsiloxane, ntxiv.
Zoo li lwm yam coolants, antifreeze txo cov crystallization kub ntawm dej thiab txo qhov expansion ntawm dej khov thaum lub sij hawm khov. Qhov no tiv thaiv kev puas tsuaj rau lub tsho ntawm lub cav txias hauv lub caij ntuj no. Nws muaj lubricating thiab anti-corrosion zog.
Dab tsi yog muaj nyob rau hauv antifreeze?
Ob peb lub kaum os "daim ntawv qhia" ntawm cov tshuaj tiv thaiv kab mob yog paub - ob qho tib si ntawm inorganic inhibitors thiab ntawm carboxylate lossis lobrid analogues. Cov classic muaj pes tsawg leeg ntawm antifreeze tau piav qhia hauv qab no, nrog rau feem pua thiab lub luag haujlwm ntawm cov tshuaj lom neeg.
- Glycols
Monohydric lossis polyhydric cawv - ethylene glycol, propanediol, glycerin. Thaum sib cuam tshuam nrog dej, qhov chaw khov ntawm qhov kawg ntawm kev daws yog txo qis, thiab qhov kub ntawm cov kua kuj nce ntxiv. Cov ntsiab lus: 25-75%.
- Dej
Deionized dej yog siv. Main coolant. Tshem tawm cov cua sov los ntawm cov chaw ua haujlwm rhuab. Feem pua - los ntawm 10 mus rau 45%.
- Dyes
Tosol A-40 yog xim xiav, uas qhia tias qhov chaw khov (-40 ° C) thiab qhov kub ntawm 115 ° C. Kuj tseem muaj cov xim liab analogue nrog crystallization point ntawm -65 ° C. Uranine, sodium ntsev ntawm fluorescein, yog siv los ua xim. Feem pua: tsawg dua 0,01%. Lub hom phiaj ntawm cov dyeing yog visually txiav txim siab npaum li cas ntawm coolant nyob rau hauv lub expansion tank, thiab kuj ua hauj lwm los mus txiav txim cov leaks.
Additives - corrosion inhibitors thiab defoamers
Vim yog tus nqi qis, inorganic modifiers feem ntau yog siv. Kuj tseem muaj cov khoom ua kom txias raws li cov organic, silicate thiab polymer composite inhibitors.
| Tshuaj Ntxiv | Класс | Txheem |
| Nitrites, nitrates, phosphates thiab sodium borates. Alkali hlau silicates
| Inorganic | 0,01 - 4% |
| Ob-, peb-basic carboxylic acids thiab lawv cov ntsev. Feem ntau siv succinic, adipic thiab decandioic acids. | Organic | 2 - 6% |
| Silicone polymers, polymethylsiloxane | Polymer composite (lobrid) defoamers | 0,0006 - 0,02% |
Defoamers tau qhia kom txo cov foaming ntawm antifreeze. Foaming tiv thaiv tshav kub dissipation thiab tsim kom muaj kev pheej hmoo ntawm kev kis kab mob ntawm cov kabmob thiab lwm yam khoom siv nrog cov khoom siv corrosion.
Qhov zoo ntawm antifreeze thiab kev pab cuam lub neej
Los ntawm kev hloov xim ntawm antifreeze, ib tug yuav txiav txim lub xeev ntawm lub coolant. Fresh antifreeze muaj xim xiav ci. Thaum lub sijhawm ua haujlwm, cov kua tau txais cov xim daj daj, thiab tom qab ntawd cov xim ploj tag nrho. Qhov no tshwm sim vim qhov degradation ntawm corrosion inhibitors, uas qhia tias yuav tsum tau hloov cov coolant. Hauv kev xyaum, kev pab cuam lub neej ntawm antifreeze yog 2-5 xyoo.
