Qhov sib txawv tseem ceeb ntawm galvanic series thiab electrochemical series yog cov galvanic series qhia qhov kev txiav txim ntawm cov hlau thiab semi-hlau, whereas electrochemical series qhia qhov kev txiav txim ntawm tus qauv electrode muaj peev xwm ntawm cov tshuaj lom neeg.
Cov galvanic series thiab electrochemical series yog ob daim ntawv sib txawv uas qhia tau hais tias kev npaj ntawm cov tshuaj raws li lawv cov khoom. Galvanic series qhia txog qhov kev txiav txim ntawm nobility, uas yog kev tiv thaiv corrosion thiab oxidation nyob rau hauv cov huab cua noo. Electrochemical cell, ntawm qhov tod tes, qhia cov txheej txheem electrode muaj peev xwm ntawm cov tshuaj hauv kev txiav txim.
Galvanic Series yog dab tsi?
Galvanic series yog ib qho kev npaj ntawm cov hlau thiab ib nrab hlau raws li lawv cov nom tswv. Nobility yog kev tiv thaiv corrosion thiab oxidation nyob rau hauv lub xub ntiag ntawm huab cua noo. Cov npe no suav nrog cov hlau, semi-metals thiab alloys vim tias tsuas yog cov ntaub ntawv no tuaj yeem raug xeb. Daim ntawv teev npe yog npaj raws li qhov muaj peev xwm ntawm cov ntaub ntawv no nyob rau hauv ib puag ncig tshwj xeeb. Feem ntau, ib puag ncig uas peb xav txog yog dej hiav txwv.
Daim duab 01: Galvanic Series ntawm Noble Metals
Lub hauv paus ntsiab lus tom qab kev npaj ntawm daim ntawv teev npe no yog tias, thaum peb muab ob lub electrodes hauv ib qho electrolyte thiab txuas cov electrodes mus rau lwm tus neeg xyuas pib, cov khoom siv tsis tshua muaj txiaj ntsig ntsib galvanic corrosion. Ntawm no, cov electrolyte txiav txim siab tus nqi ntawm corrosion. Cov yam ntxwv ntawm cov koob no yog raws li nram no:
• Nws qhia txog qhov txheeb ze ntawm cov hlau thiab cov hlau tsis muaj peev xwm.
• Kev ntsuas qhov ua tau zoo ntawm qhov muaj peev xwm corrosion ntawm qhov sib npaug yog lub hauv paus ntawm kev npaj cov koob.
• Raws li cov koob no, peb tuaj yeem txuas ob lub alloys tsis muaj corrosion
Txawm li cas los xij, muaj qee qhov kev txwv rau kev siv cov koob no ib yam nkaus.
• Txhua qhov chaw yuav tsum muaj cov galvanic sib txawv vim nws nyob ntawm ib puag ncig
• Ntxiv mus, cov galvanic corrosion nyob ntawm qhov polarization ntawm hlau thiab alloys; Yog li, cov koob yuav tsis muab cov ntaub ntawv txaus ntawm galvanic corrosion.
Electrochemical Series yog dab tsi?
Electrochemical series yog cov npe ntawm cov tshuaj lom neeg uas qhia qhov kev txiav txim ntawm cov qauv electrode muaj peev xwm ntawm lawv. Nws muab cov ntaub ntawv txaus txog cov txheeb ze reactivity ntawm cov hlau nyob rau hauv aqueous daws nyob rau hauv tus qauv tej yam kev mob. Lwm lub npe nrov rau cov koob no yog "kev ua yeeb yam". Tsis tas li ntawd, cov koob no teev cov hlau kom txo qis cov reactivity.
Nyob rau sab saum toj ntawm koob, nws muaj alkali hlau thiab alkaline ntiaj teb hlau. Cov no yog ntau reactive thiab yooj yim undergo oxidation dua cov hlau nyob rau hauv qab. Tsis tas li ntawd, lawv yooj yim hnov mob rau kev sib txuas. Cov hlau no yog li no hu ua "active metals".
Nyob hauv qab ntawm koob, muaj cov hlau hloov pauv. Lawv yog cov ruaj khov heev thiab tsis tsim cov tebchaw yooj yim. Piv txwv xws li tooj liab, kub, nyiaj, thiab lwm yam. Vim lawv cov reactivity tsawg, peb feem ntau siv lawv los ua npib, jewellery, thiab lwm yam.; peb hu lawv tias "noble metals".
Ntxiv mus, cov koob no muab cov khoom siv hluav taws xob ntawm cov khoom siv tshuaj, thiab cov npe tau npaj raws li tus qauv electrode muaj peev xwm. Peb tuaj yeem ntsuas tus nqi no los ntawm kev noj cov hlau tshwj xeeb raws li cathode thiab tus qauv hydrogen electrode raws li anode.
Qhov txawv ntawm Galvanic Series thiab Electrochemical Series yog dab tsi?
Qhov sib txawv tseem ceeb ntawm galvanic series thiab electrochemical series yog cov galvanic series qhia qhov kev txiav txim ntawm cov hlau thiab semi-hlau, whereas electrochemical series qhia qhov kev txiav txim ntawm tus qauv electrode muaj peev xwm ntawm cov tshuaj lom neeg. Thaum xav txog lub hauv paus ntsiab lus ntawm kev tsim txhua daim ntawv teev npe, galvanic series stems los ntawm galvanic corrosion ntawm hlau thiab alloys thaum electrochemical series stems los ntawm tus qauv electrode tej zaum txheeb ze rau tus qauv hydrogen electrode muaj peev xwm.
Ntxiv mus, txoj haujlwm ntawm cov hlau hauv galvanic series yuav txawv raws li ib puag ncig; Txawm li cas los xij, hauv electrochemical series, nws muaj txoj haujlwm ruaj khov. Ib qho ntxiv ntawm qhov sib txawv ntawm galvanic series thiab electrochemical series yog tias galvanic series yog tsim rau kev siv tswv yim thaum lub electrochemical series yog tsim rau kev siv theoretical.
Summary – Galvanic Series vs Electrochemical Series
Qhov sib txawv tseem ceeb ntawm galvanic series thiab electrochemical series yog cov galvanic series qhia qhov kev txiav txim ntawm cov hlau thiab semi-hlau, whereas electrochemical series qhia qhov kev txiav txim ntawm tus qauv electrode muaj peev xwm ntawm cov tshuaj lom neeg.
