, Dual kev puas tsuaj ntawm cov tshuaj corrosion
1. Oxidative yaig erosion cuam tshuam ntawm cov tshuaj ua kom dawb
Sodium Hyprochlorite (Naclo), raws li ib tug muaj zog oxidant, muaj dual corrosion mechanism:
DIRECK Oxidation: clo ⁻ Eons tuaj yeem nkag mus rau cov xim av ntawm cov hlau thiab kev ua rau cov hlau ua kom tsim kom muaj kev sib cais ntawm cov hlau nplaim. Cov kev sim tau qhia tias immersing 440c stainless hlau nyob rau hauv ib 5% Sodium hypochlorite kev daws nyob rau hauv 0.02G / m ² h h hauv ib puag ncig ib puag ncig.
Chloride ion pervation: cl ion ions muaj lub vojvoog me me (181pm) thiab muaj peev xwm nkag mus rau hauv thaj tsam passion, ua pitting corrosion pits. Rau lub Damascus steel nrog cov qauv fawm kib, qhov muaj peev xwm sib txawv ntawm cov txheej txheem hlau sib txawv yuav ua rau muaj kev sib txawv hauv nroog, ua rau nyiam ua tsis tiav ntawm kev cuam tshuam ntawm kev sib cuam tshuam ntawm kev cuam tshuam ntawm kev qhia.
2. Cov tshuaj tiv thaiv corrosion ntawm acidic
Cov txheej txheem pickling yog ib qho tseem ceeb ntawm kev tsim ntawm Damascus riam, tab sis tsis raug kev siv tau tuaj yeem ua rau kev puas tsuaj loj
Cov txheej txheem roj av tsis muaj zog (xws li cov txheej txheem redox) Tab sis yog tias cov acid concentration tshaj li tus qauv (xws li cov txheej txheem hydrocoric tseem yuav ua rau cov txheej txheem tawv nqaij, ntau dua 30 feeb), ua rau cov txheej txheem plooj plooj lossis txawm tias cov txheej txheem txheej txheem tev.
Cov kua qaub muaj zog (xws li sulfuric acid thiab nitric acid): muaj cov kua qaub muaj zog nrog lub ntsej muag ntau tshaj 50% tuaj yeem ua rau kev puas tsuaj metallurgical ntawm cov txheej txheem hlau. Cov kev sim tau qhia tias cov ntsiab lus Damascus Steel hauv 65% nitric acid rau 5 feeb txo tus interlayer sib txuas lus sib txuam ua ke ciam ciam av sib tsoo.
2, kev ua kom tau tuag taus ntawm cov qauv txheej txheem qib
1. Collapse ntawm kev ntxhib los mos
Tus tseem ceeb ntawm lub Damascus riam nyob rau hauv nws peb - Dag nrho cov qauv khoom:
Forging kev ntxhib los mos: lub wosted crystal qauv tsim los ntawm folding thiab forging (feem ntau} 32 txheej txheem sib txawv), nrog lub hardness), nrog lub hardness} 32 hrc units. Qhov no me me tsis muaj kev sib raug zoo yog lub hauv paus ntawm kev ntxuav cov kua thiab kev loj hlob, tab sis nws tseem yog qhov kis ntawm corrosion.
Corrosion diffusion: Thaum muaj cov kua qaub los yog muaj zog acid interades tus interades, nws μ m) hauv cov steel txheej, ua cov txheej txheem microcrack, kev sib sau microcack cov ntaub ntawv. Electron tsom iav tsom iav pom tau tias qhov ceev ceev ntawm lub interface ntawm cov steel txheej kho nrog sodium hypochlorite nce los ntawm 40 zaug.
2. Kev ua raws li cov khoom siv mechanical
Qhov cuam tshuam ntawm corrosion ntawm cov cuab yeej kev ua tau zoo:
Hardness poob: corrosion khoom (xws li fe-₂ o ₂ o ₂, fecl α )-3 zaug uas yog cov thawj hlau, uas tuaj yeem ua rau muaj kev ntxhov siab ntawm txheej. Lub vickers hardness ntawm Damascus Steel corroctred los ntawm hydrochloric acid poob los ntawm HV620 rau HV620 rau HV620, ib qho tsawg ntawm 22.6%.
Txo nruj heev: qhov muaj zog ntawm cov ciaj ciam av tshwm sim los ntawm corrosion ua rau qhov txo qis hauv kev cuam tshuam. Tus qauv Charpy v - tsis tshua muaj kev cuam tshuam ntawm lub zog corroded ntawm 45J, thiab lub pob txha mos uas tau hloov los ntawm corrile backure rau cleavage pob txha lov.
3, Kev Lag Luam Kev Lag Luam Kev Lag Luam Txheej Txheem
1. Kev tu thiab tu cov qauv
Nutric tu tus neeg saib xyuas: nws raug nquahu kom siv rab ntaj tshwj xeeb tu cov neeg sawv cev nrog pH 5.5-7.5, thiab ua kom huv cov neeg sawv cev.
So cov ntaub ntawv: ultra nplua fiberle phuam (xaim inter tsawg dua los yog sib npaug ntawm 0.1denier) lossis wool hnov (tej zaum yuav tsum tau zam
Cov txheej txheem kom qhuav: Tom qab tu, nws xav tau cua ua kom qhuav nrog 0.2mpa kom qhuav (cov av noo tsawg dua los yog sib npaug rau 30 teev.
2. Kev tswj ib puag ncig ib puag ncig
Kev tswj kom sov noo: Cov txheeb ze cov av noo yuav tsum tau tswj cov av noo nyob rau hauv thaj tsam 40% -60 -60 -60 -60-%, thiab hluav taws xob maub los siv tau los txuas rau dehumidifier.
Cov khoom siv rho tawm cov khoom siv: Cov ntaub qhwv ntsej muag yuav tsum tau ua los ntawm polytetrosraethylene (nrog cov ntaub ntub dej, uas yuav muaj cov kua qaub ua kua qaub).
Technology Ntim: Rau ntev - sij hawm cia, nws raug nquahu kom siv cov yeeb yaj kiab nanoscale tiv thaiv ntawm cov hlau nto.
3. Kev kho cov qauv txheej txheem
Kev kho ib nrab: rau kev xeb me, siv tshuaj electrolytic polishing muaj hluav taws xob ultrasonic), voltage tswj hwm ntawm 5v, thiab sijhawm tsis tshaj 3 feeb.
Zuag qhia tag nrho kev ua dua: Kev tiv thaiv loj heev uas yuav tsum tau tsim kho ntawm lub nqaj hluav taws xob siv tshuab hluav taws xob 10 ⁶ w / cm ²) kom paub tseeb tias tus qauv me me ntawm cov tshiab thiab qub hlau txheej.
Kev tsim kho me nyuam me nyuam: Tom qab kho, cov kev ntsuas cov ntsiab lus yuav tsum tau kuaj pom ntawm lub tshuab tsom nyiaj ntawm lub tshuab hluav taws xob (ua kom muaj kev sib luag tsawg dua lossis sib npaug ntawm cov qauv tsim.
4, cov qauv txheej txheem kev qhia kom paub tseeb
Feem ntau cov Damascus ntawm kev ua lag luam yog feem ntau forged los ntawm cov kua qaub etching thiab tuaj yeem txheeb tau los ntawm cov hauv qab no:
Metallographic Kev Ntsuam Xyuas: Clear Forging Cov Kab Flow tuaj yeem pom ntawm cov txheej txheem ntawm cov khoom lag luam, thiab tsuas yog corrosion cov cim yog tam sim no nyob rau ntawm cov duab acid etched khoom.
Hardness Gradient: lub hardness ntawm cov khoom lag luam tiag tiag raws li txheej txheej zoo dua (Δ hrc ntau dua li 1.5), thiab lub hardness ntawm cov acid etched khoom yog ib yam nkaus.
Corrosion tus cwj pwm: Cov khoom lag luam uas muaj cov khoom siv ncaj ncees hauv 5% NaCl yog tsawg dua los yog sib npaug rau 0.05G / m ²² · H, thaum acid A, thaum cov acid acid corrosion cov khoom tuaj yeem ncav 0.3g / m ²².
