Hauv dilute hydrochloric acid, sulfuric acid, thiab phosphoric acid, titanium dissolves qeeb dua li hlau. Raws li cov concentration nce, tshwj xeeb tshaj yog thaum kub nce, tus nqi ntawm titanium dissolution yog ceev ceev, thiab titanium dissolves sai heev nyob rau hauv sib tov ntawm hydrofluoric acid thiab nitric acid. Txawm li cas los xij, tshwj tsis yog rau formic acid, oxalic acid, thiab ntau ntau ntawm citric acid ntawm cov organic acids,titaniumyuav tsis corroded. Piv txwv li, nyob rau hauv cov organic acids xws li oxalic acid, butyric acid, lactic acid, maleic acid, hydroxysuccinic acid (benzene txiv hmab txiv ntoo acid), tannic acid, thiab tartaric acid, titanium muaj zog corrosion kuj.
Nitric acid yog oxidizing acid. Titanium nyob rau hauv nitric acid tuaj yeem tuav cov oxide zaj duab xis ntom ntom ntawm nws qhov chaw. Raws li qhov concentration ntawm nitric acid nce, cov zaj duab xis saum npoo zoo li daj, lub teeb daj, lub ntiaj teb daj, thiab xim av daj mus rau xiav. Ntau yam cuam tshuam xim. Kev ncaj ncees ntawm oxide zaj duab xis yog qhov tsim nyog rau kev tswj xyuas qhov corrosion ntawm titanium. Yog li ntawd, titanium muaj corrosion kuj zoo heev rau nitric acid, thiab tus nqi corrosion ntawm titanium nce nrog qhov kub ntawm nitric acid tov, qhov kub ntawm 19 0 thiab 230. C, qhov concentration ntawm 20 feem pua thiab 70 feem pua, thiab nws tus nqi corrosion tuaj yeem ncav cuag ze li 10mm / a. Daim duab 2-12 qhia qhov corrosion ntawm titanium nyob rau hauv high-temperature nitric acid. Txawm li cas los xij, ntxiv me me ntawm silicon-muaj cov tebchaw rau cov tshuaj nitric acid tuaj yeem tiv thaiv corrosion ntawm titanium los ntawm high-temperature nitric acid. Piv txwv li, tom qab ntxiv cov roj polysiloxane rau 40 feem pua siab kub nitric acid tov, tus nqi corrosion yuav raug txo kom tsawg. Kuj tseem muaj cov ntaub ntawv nthuav tawm ntawm 500. Hauv qab C, titanium muaj qhov siab ntawm corrosion kuj nyob rau hauv 40 feem pua rau 80 feem pua nitric acid tov thiab chav. Ntawm qhov tsis sib xws, ntxiv phosphide rau nitric acid yuav ua kom lub corrosion ntawm titanium, thiab cov yam ntxwv ntawm titanium no tuaj yeem siv los npaj nws cov tshuaj pickling. Hauv fuming nitric acid, thaum cov ntsiab lus carbon dioxide ntau dua 2 feem pua, cov dej tsis txaus ua rau cov tshuaj tiv thaiv exothermic, ua rau volatilization. Qhov muaj peev xwm ntawm volatilization ntawm titanium thiab nitric acid muaj feem xyuam rau cov ntsiab lus ntawm N02 thiab dej hauv nitric acid. Raws li pom hauv daim duab 2-13. Txawm li cas los xij, titanium yuav tsis volatilize nyob rau hauv nitric acid nrog ib tug concentration ntawm 80 feem pua los yog qis dua. Qhov kev sim hauv 170q2, (20 feem pua -80 feem pua) HN0, tau lees paub qhov kev txiav txim siab no. Qhov ua tau ntawm titanium siv nyob rau hauv high-temperature nitric acid saum 80 feem pua tseem xav tau kev tshawb fawb ntxiv rau kev saib xyuas kev nyab xeeb. Ntawm qhov kub siab tshaj 500 degree, titanium yog nyob rau hauv ib tug molten sib tov ntawm nitrates (50 feem pua KN03 ntxiv rau 50 feem pua NaN02 thiab 40 feem pua NaN03 ntxiv rau 7 feem pua KN03 ntxiv rau 53 feem pua NaN02) yuav tsis muaj ib tug nyiam ntawm cov tshuaj tiv thaiv combustion.
Sulfuric acid yog ib qho muaj zog txo cov kua qaub. Titanium muaj qee yam kev tiv thaiv corrosion rau qhov kub thiab txias thiab tsis tshua muaj siab sulfuric acid daws. Ntawm 0 degree, nws tuaj yeem tiv taus qhov corrosion ntawm sulfuric acid nrog ib qho concentration ntawm 20 feem pua. Nce. Yog li ntawd, kev ruaj ntseg ntawm titanium hauv sulfuric acid tsis zoo. Txawm nyob rau hauv chav tsev kub ntawm yaj oxygen, titanium tsuas tuaj yeem tiv taus 5 feem pua sulfuric acid corrosion. Ntawm 100 degree, titanium tuaj yeem tiv taus 0.2 feem pua sulfuric acid corrosion. inhibition. Tab sis ntawm 90 degree, thaum cov concentration ntawm sulfuric acid yog 50 feem pua, cov tshuaj chlorine yuav ua rau kom ceev corrosion ntawm titanium, thiab txawm ua rau hluav taws. Kev tiv thaiv corrosion ntawm titanium hauv sulfuric acid tuaj yeem txhim kho los ntawm kev dhau huab cua, nitrogen, lossis ntxiv oxidants thiab cov nqi siab hnyav hlau ions rau hauv cov tshuaj. Cov additives tseem ceeb uas tuaj yeem ua lub luag haujlwm qeeb yog cov hlau uas muaj txiaj ntsig zoo, muaj txiaj ntsig zoo tooj liab, Ti4 ntxiv, nyiaj chromate, manganese dioxide, nitric acid, chlorine, thiab cov organic corrosion inhibitors, tsuas yog nitroso compounds, quinones thiab anthraquinone derivatives, thiab qee yam. complexes. Composite corrosion inhibitor. Feem ntau hais lus, titanium tsis tshua muaj nqi hauv sulfuric acid.
Hydrochloric acid yog ib qho kev txo cov kua qaub, thiab titanium tsis ruaj khov nyob rau hauv hydrochloric acid txawm nyob rau hauv chav tsev kub. Tus nqi corrosion nce maj mam nrog cov concentration thiab kub ntawm cov kua qaub. Yog li, titanium feem ntau haum rau kev ua haujlwm hauv 3 feem pua thiab 100 degree , 0.5 feem pua hydrochloric acid daws ntawm chav tsev kub. Txawm hais tias titanium tsis tiv taus corrosion ntawm hydrochloric acid daws, nws tuaj yeem ua alloyed, anode passivated, thiab ntxiv corrosion inhibitors. Txhawm rau txhim kho corrosion kuj ntawm titanium. Qhov zoo tshaj plaws corrosion inhibitors uas muaj zog oxidizing inorganic compound titanium yog nitric acid, poov tshuaj dichromate, sodium hypochlorite, chlorine gas, oxygen, thiab cov nqi siab hnyav hlau ions (feem ntau yog Fe¨, Cu'2 ntxiv, tsawg tus nqi. hlau); Organic corrosion inhibitors Muaj oxidizing organic compounds, dichloro compounds, quinone thiab anthraquinone derivatives, heterocyclic compounds, thiab complex corrosion inhibitors, yog li lawv tseem muaj nqis siv hauv kev xyaum ntau lawm.
Cov kua qaub kuj txo cov acids. Tus nqi corrosion ntawm titanium hauv phosphoric acid yog qis dua li ntawm hydrochloric acid lossis sulfuric acid, tab sis siab dua li ntawm nitric acid. Titanium feem ntau haum rau 20. C, 30 feem pua los yog 35 degree , 20 feem pua aerated los yog non-aerated phosphoric acid. Kev tiv thaiv corrosion ntawm titanium hauv phosphoric acid nce maj mam nrog qhov nce ntawm acid concentration thiab kub, uas zoo ib yam li cov xwm txheej hauv titanium hydrochloric acid.
Titanium tau txais cov tshuaj tiv thaiv corrosion hauv qab no hauv phosphoric acid, uas yog 2Ti ntxiv rau 2H, P04=2TiP04 ntxiv rau 2H.
Zoo ib yam li cov xwm txheej ntawm titanium hauv sulfuric acid thiab hydrochloric acid, qhov sib ntxiv ntawm oxidants los yog lwm yam corrosion inhibitors rau phosphoric acid yog qhov zoo los txhim kho corrosion kuj ntawm titanium hauv phosphoric acid. Nyiaj thiab mercury kuj muaj txiaj ntsig zoo los txhim kho corrosion kuj ntawm titanium hauv phosphoric acid, thiab nitric acid kuj yog ib qho zoo oxidant. Hydrofluoric acid thiab fluorosilicic acid yog cov xov xwm corrosive tshaj plaws, txawm tias nyob rau hauv cov kua qaub hydrofluoric acid heev ntawm chav tsev kub, titanium yuav raug corroded hnyav heev. Yog li, titanium tsis tuaj yeem siv tag nrho hauv hydrofluoric acid. Titanium tsis yog tsuas yog corroded sai nyob rau hauv hydrofluoric acid tab sis kuj corroded muaj zog nyob rau hauv acidic nruab nrab uas muaj fluorine (xws li fluorosilicate thiab fluoroboric acid). Cov tshuaj tiv thaiv corrosion ntawm titanium thiab hydrofluoric acid yog Ti ntxiv 6HF=TiF, ntxiv rau 3H. Nws yog cov khoom lag luam corrosion tsis muaj kev tiv thaiv zoo, yog li cov corrosion tsim sai heev. Titanium yog ntau soluble hauv cov kua qaub sib xyaw ntawm hydrofluoric acid, hydrochloric acid, lossis sulfuric acid. Ntxiv rau qhov corrosion ntawm titanium vim yog kev sib cuam tshuam ntawm cov kua qaub thiab cov hlau, lub complexation ntawm F- thiab Ti4 ntxiv rau accelerates cov titanium dissolution. Cov tshuaj tiv thaiv no yog
Ti plus 6HF=TiF64 plus 2H plus plus 2H2 Ntxiv me me ntawm cov tshuaj fluoride soluble rau lwm cov kua qaub, xws li hydrobromic acid, perchloric acid, formic acid, thiab acetic acid, ua rau kom cov corrosion ntawm titanium ntau zaus. Acidic fluoride daws, xws li NaF, thiab KHF: kuj ua rau corrosion hnyav ntawm titanium. Tsis muaj qhov zoo tshaj plaws corrosion inhibitor tau pom nyob rau hauv hydrochloric acid.
