Corrosion Resistance Sib piv ntawm Titanium thiab lwm yam hlau

Titanium nthuav tawm kev ua haujlwm zoo heev rau ob qho tib si dav dav thiab hauv cheeb tsam corrosion nyob rau hauv nruab nrab, oxidizing atmospheres, thiab nyob rau hauv txo qhov chaw uas muaj corrosion inhibitors. Txawm hais tias titanium tuaj yeem corroded los ntawm muaj zog txo cov kua qaub los yog chromates, nws tseem nyob ruaj khov hauv cov xov xwm tsis muaj zog. Ntxiv mus, titanium tuav zoo corrosion kuj txawm nyob rau hauv siab kub. Yog li ntawd, titanium yog dav siv nyob rau hauv corrosive ib puag ncig xws li siab -kub ntsev, ntub chlorine gas, nitric acid, thiab acetic acid. Lub superior corrosion kuj ntawm titanium yog ntaus nqi los ntawm tsim ib tug ruaj khov passive zaj duab xis ntawm nws nto, uas yuav yooj yim regenerated nyob rau hauv oxidizing ib puag ncig txawm tias nws puas. Titanium tseem nyob rau hauv lub xeev passive nyob rau hauv ob qho tib si tseem thiab ceev - dej hiav txwv ntws, txawm tias thaum nws muaj ib tug loj npaum li cas ntawm sediment. Tom qab tsib xyoos ntawm kev sim hauv dej hiav txwv ntws ntawm 1 m / s, qhov corrosion ntawm titanium tsuas yog 0.00076 μm / a; Txawm hais tias tus nqi ntws ntawm 20 m / s, qhov corrosion ntawm titanium hauv dej hiav txwv yog negligible. Qhov zoo tshaj plaws seawater corrosion kuj ntawm titanium thiab nws cov alloys, nrog rau lawv cov kev muaj zog tshwj xeeb thiab zoo tshwj xeeb toughness, ua rau lawv cov ntaub ntawv tseem ceeb nyob rau hauv lub teb ntawm shipbuilding thiab marine engineering. Qhov zoo corrosion kuj ntawm titanium alloys ua rau lawv tswj tau ib txwm siv nyob rau hauv ntau yam corrosive tej yam kev mob, tso cai rau co-tsim nrog tag nrho cov qauv rau tib lub neej kev pab cuam, txo nqi txij nkawm, thiab txhawb kev pab cuam. Nyob rau tib lub sijhawm, nws tuaj yeem txo qhov tsim qauv pub rau corrosion, txo qhov hnyav ntawm cov khoom siv. Tsis tas yuav tsum muaj kev tiv thaiv txheej, ua kom yooj yim rau cov txheej txheem tsim khoom thiab txo cov nqi tsim khoom.

Piv nrog rau lwm yam hlau, titanium alloys muaj superior seawater corrosion kuj. Raws li pom nyob rau hauv Table 1, tus nqi txhua xyoo corrosion ntawm titanium alloys nyob rau hauv marine atmospheres yog 0, thaum txhuas alloys thiab stainless hlau, thiab lwm yam, qhia txawv degrees ntawm corrosion.

Table 1 Txhua xyoo Corrosion tus nqi ntawm cov khoom hlau sib txawv hauv Marine Atmosphere