Nyob rau hauv siab -kawg manufacturing teb xws li aerospace, chemical engineering, thiab cov khoom siv kho mob, titanium alloys tuav ib tug tseem ceeb txoj hauj lwm vim lawv 'ace yam ntxwv' ntawm corrosion kuj, siab zog, thiab tsawg ntom. Txawm li cas los xij, tom qab cov khoom zoo nkauj no, cov oxides, roj, thiab lwm yam kab mob uas nkag mus rau ntawm titanium alloy nto tau dhau los ua 'kev cuam tshuam tsis pom' cuam tshuam rau cov khoom zoo. Cov txheej txheem ntxuav alkali yog qhov tseem ceeb ntawm pretreatment technology los daws qhov teeb meem no. Hnub no, peb yuav coj koj los tshawb txog cov laj thawj kev tshawb fawb thiab kev txiav -ntev tiam sis ntawm alkali tu rau titanium alloys!
1. Lub hauv paus ntsiab lus ntawm Alkali Tu: Lub 'Magic of Cleaning' Tsav los ntawm Oxidizers: Hauv molten alkali cov kev daws teeb meem, oxidizers zoo li sodium nitrate hnov mob nrog cov oxide txheej ntawm cov titanium alloys (tsuas yog TiO₂). Hydroxide ions (OH⁻) ua ntej ua ke nrog titanium oxide los tsim cov khoom nruab nrab (TiO₂ⁿ⁻), uas tom qab ntawd hnov mob nrog sodium ions (Na⁺) los ua sodium titanate (NaTiO₃) uas yog soluble hauv cov tshuaj alkali, yog li ua tiav cov txheej txheem tshem tawm.
2. Lub Synergistic Art ntawm Optimizing Peb Cov Txheej Txheem Txheej Txheem: 1. Kev sib xyaw ntawm cov tshuaj alkali: 'cov txheej txheem sib npaug' ntawm sodium nitrate; 2. Kev tswj qhov kub thiab txias: ' thaj tsam nyab xeeb' ntawm 480-520 degree; 3. Lub Sijhawm Tswjhwm: 'Lub voj voog luv luv rov ua ntau zaus' kom ua tau zoo dua.
3. Kev Lag Luam Trends: Ntsuab thiab txawj ntse, ua rau yav tom ntej ntawm kev ntxuav. Environmentally friendly formulations, qis emissions, thiab ntau sustainability; ntse tswj qhov kub thiab txias, kev tswj xyuas meej ntawm txhua qib; automated ntau lawm kab, hais goodbye rau phau ntawv dependence.
Case Study: Tus Txheej Txheem Txhim Kho ntawm TC4 Alloy
Cov txheej txheem alkaline tu ib txwm siv rau TC4 alloy siv cov qauv ntawm 85% NaOH thiab 15% NaNO₃, ntxuav ntawm 520℃rau 10 feeb. Thaum nws tuaj yeem tshem tawm cov nplais oxide, nws ua rau cov hlau poob siab ntawm 1.234% thiab ua rau muaj kev pheej hmoo ntawm hydrogen embrittlement.
Tom qab kev ua kom zoo, cov mis ntawm 87% NaOH thiab 13% NaNO₃ yog siv, tsuas yog 5 feeb ntawm kev ntxuav ntawm 350 degree. Cov hlau poob poob rau 0.308%, thiab tsis muaj cov oxide seem ntawm qhov chaw. Qhov kev txhim kho no, ua tiav los ntawm kev txo qis ntawm qhov kub thiab txias thiab sodium nitrate concentration, txo cov khoom poob thiab kev pheej hmoo ntawm hydrogen embrittlement thaum tswj kev tu kom zoo, ua rau kev lag luam- lees paub piv txwv ntawm cov txheej txheem optimization.
