Corrosion Resistance ntawm Titanium nyob rau hauv Oxidizing Acid Ib puag ncig

Titanium feem ntau tshwm sim raws li oxide ore thiab nyob qib plaub uas muaj hlau ntau tshaj plaws nyob rau hauv lub ntiaj teb pob zeb. Rutile, los yog Titanium dioxide, thiab ilmenite, los yog Titanium-hlau oxide, yog cov ntaub ntawv ua lag luam, nrog rutile muaj cov ntsiab lus siab tshaj titanium. Thaum xub thawj raug rho tawm hauv daim ntawv tsis huv hauv xyoo 1887, Titanium pom cov ntawv thov tseem ceeb hauv cov dav hlau thiab cov hlab ntsha siab nyob ib ncig ntawm 1952.

Raws li cov hlau reactive, Titanium nthuav tawm qhov zoo tshaj plaws corrosion kuj nyob rau hauv oxidizing acidic ib puag ncig vim nws passive oxide zaj duab xis. Tshaj li ib nrab xyoo dhau los, Titanium tau tsim los ua cov khoom siv tiv thaiv corrosion, nrhiav kev siv thoob plaws hauv kev lag luam. Cov kev tsim tshuaj lom neeg feem ntau siv cov khoom lag luam ntshiab ntawm Titanium, xws li Qib 2, Qib 4, Qib 7, thiab Qib 12. Zoo ib yam li cov hlau tsis muaj steel, Titanium tso siab rau nws cov oxide zaj duab xis rau kev tiv thaiv thiab ua tau zoo tshaj plaws hauv oxidizing tej yam kev mob xws li kub nitric. kua qaub. Cov txheej txheej oxide no muaj kev tiv thaiv zoo dua piv rau Stainless Steel, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas muaj kev cuam tshuam rau pitting thiab crevice corrosion xws li seawater, chlorine raug, thiab organic chlorides.

Txawm hais tias nws tsis kam, Titanium muaj qhov cuam tshuam rau pitting thiab crevice corrosion ntawm qhov kub siab thiab tuaj yeem muaj kev xeb hauv dej hiav txwv yog tias kub tshaj 230 degree F (110 degree).

Titanium muaj kev cuam tshuam rau corrosion inhibition los ntawm cov tshuaj xws li ferric chloride (FeCl3) thiab cupric chloride (CuCl2), uas feem ntau induce pitting nyob rau hauv feem ntau hlau thiab alloys. Thaum tsis tiv taus cov ntshiab sulfuric thiab hydrochloric acids, Titanium ua tau zoo thaum raug cov kua qaub hnyav nrog ferric thiab cupric ions. Tsis tas li ntawd, titanium ua kom pom kev ua haujlwm siab rau chav thiab lwm qhov chaw ua haujlwm caustic. Tom qab lub sijhawm ntev ntawm qhov kub ntawm qhov kub txog li 750 degree F (400 degree), Titanium tseem nyob ruaj khov, ua rau nws zoo tagnrho rau kev siv xws li cov khoom siv hluav taws xob, cov kav dej siab, tubing, thiab fittings siv nyob rau hauv seawater ib puag ncig.

Txawm hais tias nws muaj keeb kwm tseem ceeb hauv kev siv dav hlau, Titanium tseem nrhiav kev nthuav dav siv thoob plaws ntau hom kev lag luam, suav nrog riam phom thiab kev tiv thaiv, roj thiab roj, thiab lwm yam.