Passive Oxide Txheej
Copper rods ib txwm tsim ib txheej oxide nyias ntawm lawv qhov chaw thaum raug huab cua. Cov txheej oxide no, feem ntau yog tsim los ntawm cuprous oxide thiab cupric oxide, ua raws li kev tiv thaiv kev tiv thaiv ntxiv oxidation thiab corrosion. Cov oxide txheej inhibits qhov diffusion ntawm corrosive agents, xws li dej thiab oxygen, mus rau hauv qab tooj liab, yog li txo tus nqi ntawm corrosion.
Tus kheej -Kev Muaj Peev Xwm Kho Mob
Nyob rau hauv lub xub ntiag ntawm oxygen thiab noo noo, txheej oxide ntawm tooj liab rods tuaj yeem raug tshuaj lom neeg tsis tu ncua, tso cai rau nws tus kheej - kho yog tias puas. Thaum muaj kev khawb los yog qhov chaw xeb tshwm sim, cov tooj liab raug cuam tshuam nrog oxygen thiab noo noo kom rov tsim cov txheej txheem oxide tiv thaiv. Txoj kev kho tus kheej no - kho tus kheej pab tswj kev tiv thaiv corrosion ntawm tooj liab pas nrig thaum lub sijhawm.
Tsawg Reactivity
Tooj liab muaj qhov tsis tshua muaj kev cuam tshuam nrog ntau cov kab mob corrosive xws li dej, huab cua hauv huab cua, thiab feem ntau cov organic tebchaw. Qhov no tsis tshua muaj reactivity yog vim tooj liab txoj hauj lwm nyob rau hauv lub electrochemical series, ua rau nws tsis tshua muaj corrosion piv nrog rau lwm yam hlau. Tooj liab tsis tshua muaj reactivity xyuas kom meej tias nws nyob ruaj khov thiab tiv taus degradation nyob rau hauv ntau qhov chaw.
pH stability
Copper rods pom zoo tiv thaiv corrosion nyob rau hauv ob qho tib si acidic thiab alkaline ib puag ncig. Corrosion kuj tseem ceeb tshwj xeeb tshaj yog nyob rau hauv me ntsis acidic tej yam kev mob, raws li tooj liab cov ntaub ntawv ruaj khov complexes nrog acid ions, rendering lawv tsawg corrosive. Txawm li cas los xij, nyob rau hauv cov kua qaub los yog alkaline heev, qhov corrosion kuj ntawm tooj liab tuaj yeem cuam tshuam.
Alloying teebmeem
Qhov sib ntxiv ntawm qee cov ntsiab lus alloying tuaj yeem txhim kho corrosion kuj ntawm tooj liab rods. Copper alloys xws li tooj liab, tooj liab-tin, thiab tooj dag, tooj liab-zinc, muab kev txhim kho corrosion piv nrog cov tooj liab ntshiab. Cov ntsiab lus alloying tsim cov theem tiv thaiv lossis txo cov reactivity ntawm tooj liab, txhim kho nws cov kev tiv thaiv rau corrosive ib puag ncig.
Environmental Factors thiab Kev Tiv Thaiv
Thaum tooj liab rods pom zoo heev corrosion kuj, qhov tshwj xeeb ib puag ncig cuam tshuam kev ua tau zoo. Cov yam ntxwv xws li cov av noo, qhov kub thiab txias, muaj cov tshuaj aggressively, thiab raug rau marine los yog industrial atmospheres yuav cuam tshuam rau corrosion. Kev xaiv zoo ntawm cov tooj liab alloys lossis cov txheej tiv thaiv tuaj yeem txo cov kev pheej hmoo corrosion hauv cov cheeb tsam nyuaj. Nws yog ib qho tseem ceeb rau kev ntsuam xyuas cov kev thov tshwj xeeb thiab sab laj cov qauv tsim nyog kom ntseeg tau tias kev tiv thaiv corrosion tsim nyog raug siv.
Cov lus nug nquag
Q: Vim li cas tooj liab tiv thaiv corrosion?
A: Kev tiv thaiv cuprous thiab cupric oxide txheej ua rau ntawm qhov chaw.
Q: Cov oxide txheej puas tuaj yeem kho nws tus kheej?
A: Yog lawm, cov tooj liab raug rov tsim dua cov oxide txheej nrog oxygen thiab noo noo.
Q: Puas yog tooj liab ruaj khov hauv cov kua qaub thiab alkalis?
A: Yog, nyob rau hauv me ntsis acidic thiab alkaline tej yam kev mob, tab sis tsis nyob rau hauv huab pH.
Q: Puas alloys txhim kho corrosion kuj?
A: Yog, bronze thiab tooj dag tsim cov theem tiv thaiv nrog txo qis reactivity.
Q: Dab tsi ib puag ncig hem tooj liab rods?
A: High humidity, aggressive chemicals, thiab marine los yog industrial atmospheres.
Q: Cov tooj liab tiv thaiv li cas hauv kev pabcuam hnyav?
A: Los ntawm kev xaiv cov hlau zoo lossis siv cov txheej txheem tiv thaiv.
Tiv tauj peb rau tooj liab rods thiab tooj liab alloy tuav nrog corrosion cov ntaub ntawv thiab daim ntawv thov kev taw qhia.
