Feem ntau hais lus, corrosion kuj ntawm titanium kuj zoo nyob rau hauv oxidizing nruab nrab xws li nitric acid, chromic acid, hypochlorous acid thiab perchloric acid. Hauv cov nruab nrab no, titanium tuaj yeem tsim cov txheej txheem oxidation zaj duab xis uas tuaj yeem tiv thaiv corrosion ntxiv. Txawm li cas los xij, nyob rau hauv cov kua qaub txo qis xws li dilute sulfuric acid tov thiab hydrochloric acid thiab lwm yam, vim lub passivity rhuav tshem ntawm oxidation zaj duab xis, lub corrosion ceev ntawm titanium yog ceev thiab yuav ceev raws li qhov nce ntawm qhov kub thiab txias.
Hauv qhov txo qis acid, ntxiv cov ntsev hnyav hlau tuaj yeem ua lub luag haujlwm pom tseeb hauv kev tiv thaiv corrosion. Piv txwv li, titanium palladium alloy thiab titanium npib tsib xee molybdenum alloy, los ntawm kev ntxiv qee cov hlau hnyav, yuav muaj kev txhim kho tseem ceeb hauv kev tiv thaiv corrosion piv nrog cov ntshiab titanium. Yog li ntawd, cov alloys no tuaj yeem muaj kev ua tau zoo nyob rau hauv ib puag ncig corrosion tshwj xeeb.
Titanium yog ib qho ntawm cov khoom siv hlau zoo tshaj plaws rau nitric acid tov khoom cua sov. Thaum raug 60% nitric acid nyob ib ncig ntawm 193 degree, titanium tshav kub exchanger tsis tau pom qhov pom tseeb corrosion tom qab siv ntau xyoo. Txawm tias nyob rau hauv boiling 40% thiab 68% nitric acid, corrosion ceev ntawm titanium tej zaum yuav ceev, tab sis tom qab ib tug luv luv lub sij hawm, lub passivity ntawm titanium yuav rov qab sai sai thiab corrosion ceev yuav txo tau obviously. Nws tuaj yeem cuam tshuam nrog kev tiv thaiv corrosion ua los ntawm titanium ions hauv cov txheej txheem corrosion.
Nyob rau hauv nitric acid ntawm qhov kub thiab txias, titanium corrosion kuj nyob ntawm purity ntawm nitric acid. Thaum cov concentration ntawm nitric acid nyob nruab nrab ntawm 20% thiab 60%, corrosion phenomena tej zaum yuav pom tseeb. Txawm li cas los xij, txawm tias nyob rau hauv cov ntsiab lus nitric nrog cov kab hlau ions xws li Si, Cr, Fe, thiab Ti, cov ions tuaj yeem ua lub luag haujlwm hauv kev txo cov corrosion ntawm titanium. Piv rau stainless hlau, titanium qhia ntau dua corrosion kuj nyob rau hauv nitric acid daws nyob rau hauv high kub. Dhau li ntawd, cov khoom titanium corrosion (Ti4+) nws tus kheej yog ib qho zoo meej nitric acid corrosion inhibitor.
Nyob rau hauv sulfuric acid ventilated nrog huab cua ntawm chav tsev kub, cov ntshiab titanium tsuas tuaj yeem tiv taus cov tshuaj sulfuric acid tsawg dua 5%. Nrog rau qhov kub thiab txias, qhov concentration ntawm sulfuric acid tov uas titanium tuaj yeem tiv taus yuav zoo dua. Txawm li cas los xij, thaum qhov kub thiab txias tau nce mus rau qhov kub ntawm cov tshuaj, titanium tseem tuaj yeem ua rau corrosive txawm xav tias qhov concentration ntawm sulfuric acid tov poob rau 0.5%. Nyob rau tib qhov ntsuas kub, yog tias qhov cua nrog nitrogen, qhov corrosion ceev ntawm titanium sai dua li nrog huab cua. Txoj cai corrosion no yeej ib txwm zoo ib yam nyob rau hauv lwm yam txo inorganic acids.
Nyob rau hauv chav tsev kub, cov ntshiab titanium muaj peev xwm tiv taus cov hydrochloric acid tsawg dua 7%. Txawm li cas los xij, nws qhov kev tiv thaiv corrosion yuav raug txo kom pom tseeb nrog qhov nce ntawm qhov kub thiab txias. Los ntawm qhov sib piv, titanium nickel molybdenum alloy tuaj yeem tiv taus 9% hydrochloric acid tov thiab Titanium palladium alloy tuaj yeem tiv taus txog 27% hydrochloric acid. Qhov sib ntxiv ntawm cov valence hnyav hlau ions (xws li hlau, npib tsib xee, tooj liab, molybdenum, thiab lwm yam) tuaj yeem txhim kho corrosion kuj ntawm titanium uas yog ib qho ntawm cov laj thawj uas titanium tuaj yeem ua tiav rau hydrochloric acid system hauv hydrometallurgical kev lag luam.
Tsis tas li ntawd, nyob rau hauv chav tsev kub, cov ntshiab titanium tuaj yeem tiv taus qis dua 30% phosphoric acid tov. Txawm li cas los xij, qhov concentration ntawm phosphoric acid nws tuaj yeem zam tau yuav raug txo qis. Thaum qhov kub nce mus txog 100 degree, qhov concentration ntawm phosphoric acid tsuas yog tuaj yeem tswj tau ntawm li 2%, tab sis thaum kub nce mus txog lub xeev kub, nws tsis tuaj yeem ua kom lub zog ntawm titanium.
Nyob rau hauv xaus, lub corrosion kuj ntawm titanium nyob rau hauv sib txawv nruab nrab yuav muaj ib tug tseem ceeb sib txawv vim hais tias ntawm nws tshwj xeeb tshuaj zog thiab alloying txoj kev. Hauv daim ntawv thov, nws yuav tsum xaiv cov khoom siv titanium kom ua tau raws li cov kev cai siv raws li qhov tshwj xeeb corrosive ib puag ncig thiab xav tau.
