1.Yog Qib 2 corrosion resistant nyob rau hauv seawater?
Yog lawm, Qib 2 (Unalloyed Titanium, Ti-CP Qib 2) pom zoo corrosion kuj nyob rau hauv seawater. Nws tsim ib qho ruaj khov, tiv thaiv oxide zaj duab xis (TiO₂) ntawm nws qhov chaw thaum raug cov pa oxygen, uas zoo tiv thaiv corrosion nyob rau hauv tej yam ntuj tso seawater ib puag ncig, xws li marine splash zones, tidal zones, thiab submerged tej yam kev mob. Nws muaj kev tiv thaiv zoo rau kev xeb, pitting, crevice corrosion, thiab kev nyuaj siab corrosion cracking (SCC) nyob rau hauv dej hiav txwv ntawm ambient kub. Txawm li cas los xij, ntawm qhov kub siab (feem ntau siab dua 120 degree) los yog hauv cov crevices nrog stagnant, qis - oxygen seawater, localized corrosion yuav tshwm sim nyob rau hauv tej yam kev mob.
2. Puas yog Qib 2 tiv taus cov kua qaub thiab alkalis?
Cov kua qaub: Qib 2 muaj qhov zoo corrosion kuj hauv oxidizing acids xws li nitric acid, chromic acid, thiab concentrated sulfuric acid (ntawm qhov kub qis). Nws kuj yog resistant rau feem ntau cov organic acids (xws li, acetic acid, citric acid) thiab dilute non-oxidizing acids (xws li, dilute hydrochloric acid, dilute sulfuric acid) nyob rau hauv chav tsev kub. Txawm li cas los xij, nws cov corrosion kuj txo qis hauv cov concentrated, kub tsis yog -oxidizing acids (xws li, kub concentrated HCl, H₂SO₄) thiab hydrofluoric acid (HF), uas tawm tsam cov oxide zaj duab xis.
Alkalis: Qib 2 qhia tau tias muaj kev tiv thaiv zoo rau feem ntau cov tshuaj alkaline, suav nrog sodium hydroxide (NaOH), potassium hydroxide (KOH), thiab calcium hydroxide (Ca(OH) ₂), thoob plaws ntau qhov ntau thiab qhov kub thiab txias. Nws yog ruaj khov nyob rau hauv ob qho tib si dilute thiab concentrated alkalis, tsis muaj qhov tseem ceeb corrosion pom nyob rau hauv tej yam kev mob.
3. Puas yog Qib 2 tiv taus pitting thiab crevice corrosion?
Qib 2 muaj kev tiv thaiv zoo rau pitting corrosion nyob rau hauv feem ntau ntuj puag ncig, nrog rau cov seawater, vim nws ruaj khov passive oxide txheej. Nws tsis yooj yim rau pitting ntau dua stainless hlau hauv chloride - muaj ib puag ncig.
Rau crevice corrosion, Qib 2 ua tau zoo nyob rau hauv ib puag ncig ib puag ncig -kub dej hiav txwv thiab ntau qhov chaw tshuaj lom neeg. Txawm li cas los xij, nws muaj kev cuam tshuam rau kev xeb nyob rau hauv qhov mob hnyav heev (piv txwv li, qhov khoob khoob, cov kev daws teeb meem, cov tshuaj chloride siab, thiab qhov kub siab, feem ntau siab dua 70-80 degree). Nyob rau hauv tas li ntawd, nyob rau hauv lub zos kev puas tsuaj ntawm passive zaj duab xis nyob rau hauv crevices yuav ua rau kom ceev corrosion. Siab dua -qib titanium alloys (piv txwv li, Qib 7, Qib 12) muab kev txhim kho crevice corrosion tsis kam rau ntau qhov kev sib cav sib ceg.
