Sodium hydroxide, feem ntau yog hu ua caustic dej qab zib, hluav taws xob dej qab zib, thiab caustic dej qab zib, yog cov flakes ya ri, granules, lossis block. Nws yog yooj yim soluble hauv dej (nws tso tawm thaum tshav kub kub thaum yaj hauv dej) thiab tsim cov tshuaj alkaline. Nws yog Deliquescent thiab tuaj yeem yooj yim nqus dej dej vapor (duraliqueescence) thiab carbon dioxide (detheration) hauv huab cua. Hydrochloric acid tuaj yeem raug ntxiv los xyuas seb nws puas muaj qhov tsis zoo. Yooj yim soluble hauv dej, ethanol, thiab glycerol, tab sis insoluble hauv acetone thiab ether. Cov khoom ntshiab yog qhov tsis muaj kob thiab pob tshab siv lead ua. Ntom ntom ntom ntom 2.13g / cm3. Melting point 318 ℃. Hnnaub taw tes 1388 ℃. Muaj cov khoom lag luam muaj me me ntawm sodium chloride thiab sodium carbonate, uas yog cov muaju dawb opaque muaju. Cia peb tham txog cov kev siv ntawm sodium hydrochode hauv cov txheej txheem hlau ua kom zoo.
1. Rau cov roj tshem tawm, siv sodium hydroxide kom hnov mob nrog cov roj ntsha sab hauv cov tsiaj thiab cov kua dej los tsim cov dej-solub spearate (xab npum) thiab glycerin). Thaum cov concentration ntawm sodium hydroxide txo qis thiab lub p yog tsawg dua 10.5, sodium stearate yuav raug txo cov nyhuv hydrolyzed yuav raug txo; Yog hais tias kev hais txog siab dhau lawm, lub solubility ntawm sodium stearate thiab surfactant yuav raug txo, ua rau cov dej tsis zoo thiab hydrogen oxidation. Cov sodium ntau npaum li cas tsis tshaj 100g / l. Sodium hydroxide yog siv dav hauv cov hlau, xws li muaj ntau tus hlau, nab, tooj liab, thiab cov khoom siv hlau, rau ntau yam ua ntej plating. Txawm li cas los xij, sodium hydroxide yuav tsum tsis txhob siv rau degreati-soluble hlau seem xws li txhuas thiab zinc. Alkaline Degreasing ntawm cov khoom yas yog tsim rau ABS, cov PYSULFONE, thiab lwm yam xws li cov kev daws teeb meem zoo nkauj uas tsis haum rau Alkaline Degreeze.
2. Hlau etching daim ntawv thov ①. Nyob rau hauv kev kho ntawm txhuas alloy ua ntej oxidation, muaj ntau ntau ntawm sodium hydroxide yog siv rau alkali etching. Txoj kev no yog txoj kev kho ua ntej cov txheej txheem txhuas alloy oxidation. Qhov ntau ntawm sodium hydrocide tseem siv rau txhuas alloy kev ntxhib los mos etching. ②. Sodium hydroxide yog qhov tseem ceeb etching cov khoom nyob rau hauv cov tshuaj etching txheej txheem ntawm txhuas thiab alloys. Nws tseem yog ib txoj kev coj ua thiab niaj hnub no. Hauv cov txheej txheem etching ntawm txhuas thiab alloys, cov ntsiab lus ntawm sodium hydroxide feem ntau tswj hwm ntawm 100 ~ 200g / l. , thiab raws li cov concentration ntawm sodium hydroxide nce ntxiv, qhov etching ceev accelerates. Txawm li cas los xij, yog hais tias kev hais txog siab dhau, nws yuav ua rau tus nqi. Qhov etching zoo ntawm qee cov ntaub ntawv txhuas cov ntaub ntawv tsis txaus ntseeg. Cov tshuaj tiv thaiv yog li hauv qab no Ai + Naoh + h2o = naaio2 + h2 ↑
3. Hauv cov ntawv thov elecoplating thiab tshuaj lom neeg cov ntaub ntawv sib xyaw, ntau npaum li cas ntawm sodium hydroxide yog siv nyob rau hauv Alkaline Tin Plating thiab Alkaline Zinc Plating. Tshwj xeeb tshaj yog nyob rau hauv alkaline zinc plating, ib qho txaus ntawm sodium hydroxide yog qhov xwm txheej los tswj kev daws teeb meem; Hauv Electroless plating Nws yog siv rau pH kho ntawm electroless tooj liab tooj liab liab plating plating; Siv rau kev npaj ntawm zinc immerch tov ua ntej txhuas alloy electroless plating / Electroplating, thiab lwm yam. Daim ntawv thov hauv cyanide zinc plating. Sodium hydroxide yog lwm tus neeg sawv cev hauv lub plating da dej. Nws nyuaj nrog zinc ions los tsim zincate ions, uas ua rau lub plating da dej ntau ruaj khov thiab txhim kho qhov kev tshaj lij ntawm cov plating da dej. Yog li ntawd, lub cathode tam sim no ua tau zoo thiab rho tawm muaj peev xwm los disating cov kev daws teeb meem tau txhim kho. Thaum sodium hydroxide cov ntsiab lus yog siab, tus ande Dissolves sai dua, ua rau cov lus qhia zinc nyob rau hauv cov kev daws teeb meem kom nce thiab ua kom ntxhib. Yog hais tias sodium hydroxide yog tsawg dhau, qhov kev ua tau zoo ntawm cov plating tov yog pluag, txoj kev siv ua tau zoo tam sim no, thiab cov txheej txheej yuav ua tau zoo. Hauv kev daws teeb meem uas tsis muaj sodium hydroxide, cathode efficiency yog tsawg heev. Raws li cov concentration ntawm sodium hydroxide nce, cathode effectage maj mam nce. Thaum cov concentration ntawm sodium hydroxide ncav ib yam dab tsi (xws li 80g / l), cathoe efficiency mus txog tus nqi siab tshaj plaws thiab tseem ceeb tas li tom qab ntawd. ②. Daim ntawv thov nyob rau hauv Zincate Electroplating: sodium hydroxide yog ib tug neeg sawv cev ua nyuaj thiab cov ntsev ua haujlwm. Ib me ntsis dhau ntawm sodium hydrochode tuaj yeem ua rau lub zog ua kom ruaj khov thiab muaj cov txiaj ntsig zoo dua qub, uas muaj peev xwm ua tau zoo dua los txhim kho lub peev xwm los ntawm cov plating daws. , thiab cia lub anode kom yaj ib txwm. Qhov sib piv loj ntawm zinc oxide rau sodium hydroxide nyob rau hauv zincate plating cov tshuaj yog qhov uas tsis pub tshaj rau 1: (nrog rau qhov chaw qis dua rau kev tso plating plating. Thaum sodium hydroxide cov ntsiab lus dhau lawm, lub anode dissolves sai dhau, kev pom zoo ntawm zinc ions hauv lub plating da dej dhau lawm, thiab cov crystallization ntawm txheej yog ntxhib. Yog tias cov ntsiab lus tsawg dhau, qhov kev coj ua ntawm cov dej da dej yog txo qis, thiab zinc hydroxide cov nag lossis cov generated yooj yim, uas cuam tshuam qhov zoo ntawm txheej. ③. Daim ntawv thov hauv Alkaline Tin plating. Hauv cov kev ua tiav alkaline plating, lub ntsiab muaj nuj nqi ntawm sodium hydroxide yog los ua cov neeg ruaj khov nrog cov lus sib luag, thiab pab txhawb qhov kev tsis sib xws ntawm anode. Raws li cov concentration ntawm sodium hydroxide nce, lub polarization ua kom muaj zog thiab muaj peev xwm dispersion muaj txiaj ntsig, tab sis tam sim no efficiency txo. Yog hais tias sodium hydroxide yog dhau lawm, nws yog qhov nyuaj rau lub anode kom muaj lub xeev ib nrab passivated ib nrab, ua rau muaj cov khoom tsis zoo. Yog li ntawd, tswj tau lub concentration ntawm sodium hydroxide yog qhov tseem ceeb tshaj qhov tswj cov lus ntsev ntsev. Feem ntau sodium hydroxide yog tswj hwm ntawm 7 ~ 15G / l, thiab yog tias potassium hydrocide siv, nws yog tswj ntawm 10 ~ 20g / l. Nyob rau hauv Alkaline Electroless Copper plating txheej txheem, sodium hydroxide feem ntau yog siv los kho tus nqi ntawm cov kev daws teeb meem thiab muab ib qho chaw alkaline rau formaldehyde txo. Nyob rau hauv qee qhov kev mob, nce kev xav txog sodium hydroxide tuaj yeem ua rau cov ceev ntawm tooj hluav taws xob depigition, tab sis yuav hloov kom txo qis ntawm electroless ntawm electroless plating. Sodium hydroxide tseem muaj dav siv nyob rau hauv oxidation ntawm hlau. Cov concentration ntawm sodium hydroxide ncaj qha cuam tshuam rau oxidation ceev ntawm cov hlau. High-steel hlau muaj cov oxidation oxidation ceev thiab qis dua siab (550 ~ 650g / l) tuaj yeem siv. Cov hlau roj carbon hlau oxidation qhov nrawm yog qeeb thiab siab dua (600 ~ 00G / l) tuaj yeem siv. Thaum cov concentration ntawm sodium hydroxide yog qhov siab, tab sis cov duab yeeb yaj kiab txheej xoob xoob xoob, tab sis cov duab ua yeeb yaj kiab xoob xoob xoob, tab sis cov hmoov av, thiab cov hmoov av liab. Yog hais tias cov concentration ntawm sodium hydroxide tshaj 1100G / L, cov hlau hlau sib nqus oxide yog yaj thiab tsis tuaj yeem ua ib zaj duab xis. Cov concentration ntawm sodium hydroxide yog tias nws tsawg dhau, cov oxide zaj duab xis yuav yuag thiab cov npoo yuav ci ntsa iab, thiab kev tiv thaiv yuav ua tsis tau zoo.
4. Thov hauv dej phwj tuaj: Sodium hydroxide yog ib qho uas siv neutraling tus neeg sawv cev ntawm electroplating los ntawm electroplating, anodizing, thiab lwm yam.
Lub Sijhawm Post: Sep-04-2024
