Lub crevice corrosion rhiab heev ntawm titanium kuj muaj feem xyuam rau qhov loj ntawm qhov crevice. Qhov ua tau ntawm crevice corrosion nyob rau hauv qhov sib txawv nqaim yog ntau dua li qhov sib txawv ntawm qhov dav. Thaum titanium nyob rau hauv kev sib cuag nrog cov ntaub ntawv uas tsis yog-hlau, lub crevice corrosion nyiam ntau dua li ntawm Ti Ti hom crevice. Nyob rau hauv qhov tseeb, feem ntau ntawm cov crevice corrosion nyob rau hauv cov khoom kuj tshwm sim nyob rau hauv lub flange sealing nto nyob rau hauv kev sib cuag nrog cov uas tsis yog-metallic gasket. Crevice corrosion kuj tshwm sim hauv titanium raj hauv hydrochloric acid, sulfuric acid, oxalic acid, thiab formic acid daws. Txij li ntau yam titanium cov kav dej thiab cov titanium alloys muaj cov yam ntxwv tshwj xeeb hauv lub cev, tshuaj lom neeg, kev siv tshuab, kev tiv thaiv corrosion thiab cov txheej txheem kev ua haujlwm, cov qauv ntawm cov khoom siv feem ntau ua los ntawm cov hlau ferrous thiab lwm yam hlau tsis muaj hlau tsis tuaj yeem siv rau qhov muag tsis pom kev hauv cov qauv tsim. Raws li kev ua tau zoo ntawm cov khoom siv titanium, cov kev cai dav dav rau kev tsim qauv ntawm cov khoom siv titanium tau thov.
1. Vim tias cov khoom siv hluav taws xob ntawm titanium thiab titanium alloy yog qhov sib txawv ntawm cov hlau, qhov sib piv ntawm cov khoom siv titanium yog siab, cov yas deformation yog nqaim, thiab lub caij nplooj ntoos hlav rov qab yog loj thaum lub sij hawm txias stamping thiab txias dabtsi yog khoov. Yog li ntawd, cov qauv ntawm cov khoom siv titanium yuav tsum tau ua kom yooj yim. Nyob rau tib lub sijhawm, cov qauv zoo kuj tseem yooj yim rau kev ntxuav qhov chaw nyob ze ntawm qhov sib koom ua ke, thiab cov roj siv hluav taws xob siv los tiv thaiv qhov zoo ntawm cov pob qij txha hauv pem hauv ntej thiab nraub qaum.
2. Titanium tuaj yeem welded nrog Cuo, Ni, Dan, thiab cov hlau lead tsis muaj brittleness tom qab vuam vim tias cov hlau no yog soluble hauv titanium heev. Txawm li cas los xij, kev sib koom ua ke ntawm titanium nrog hlau thiab lwm yam hlau tsis zoo, yog li titanium thiab lwm yam hlau tsis tuaj yeem ncaj qha welded. Tsuas yog kev sib txuas, brazing, tawg vuam, thiab bolting tuaj yeem siv rau kev sib txuas.
3. Qhov cuam tshuam toughness thiab tawg toughness ntawm titanium tsis zoo, yog li qhov txuas ntxiv ntawm cov qauv thiab qhov smoothness ntawm cov vuam sib txuas yuav tsum tau tswj xyuas thaum tsim kom tsis txhob muaj kev ntxhov siab ntau li ntau tau.
4. Ntshiab titanium yog nquag rau crevice corrosion nyob rau hauv cov tshuaj chloride, tab sis lub crevice corrosion ntawm titanium yog ze ze rau qhov kub thiab txias, chloride concentration, pH nqi, thiab crevice loj.
5. Cov yas deformation ntau yam ntawm titanium yog nqaim thiab muaj qhov pom tseeb ua haujlwm hardening tshwm sim. Yog li ntawd, qhov dabtsi yog khoov thiab flanging ntawm titanium qhov chaw feem ntau txais yuav ib tug loj dabtsi yog khoov vojvoog, thiab cov yeeb nkab expansion tus nqi yog me me.
Hauv dej hiav txwv thiab NaCl brine, titanium yuav tsis corrode thaum kub qis dua 149 degree. Thaum qhov kub siab tshaj 121 degree, titanium yuav corrode nyob rau hauv qhov sib txawv nqaim heev, tshwj xeeb tshaj yog nyob rau hauv lub tsis-hlau gasket. Txawm li cas los xij, thaum qhov kub siab tshaj 149 degree, titanium yuav corrode nyob rau hauv qhov dav dav, xws li qhov sib txawv ntawm lub raj thiab cov ntawv raj. Thaum muaj cov tshuaj chloride nyuaj rau ntawm cov hlau nto, qhov ua tau zoo ntawm cov tshuaj chloride nyob rau hauv cov deposits yuav sib npaug rau cov tshuaj chloride solubility ntawm cov yeeb nkab phab ntsa kub. Tsis tas li ntawd, vim qhov thermal rwb thaiv tsev ntawm cov crud, qhov kub tuaj yeem nce siab heev. Yog li ntawd, lub crud kuj yog ib qho chaw ua rau crevice corrosion. Qhov siab dua qhov kub thiab chloride concentration, ntau dua qhov crevice corrosion nyiam ntawm titanium
