Puas yog Corrosion Resistance ntawm Qib 2 Titanium Superior rau Qib 1?
1. Chemical Composition Foundation
2. Corrosion Resistance Performance Comparison
a. General Corrosion Resistance
Ob qib ua pov thawj zoo heev rau nruab nrab / tsis muaj zog acidic / hauv paus ntsiab lus (xws li, dej tshiab, dej hiav txwv, organic acids xws li acetic acid). Txawm li cas los xij, Qib 2's thicker thiab ruaj khov dua zaj duab xis ua kom ntev dua - tiv thaiv corrosion tsis zoo, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig nrog cov tshuaj oxidizing nruab nrab (xws li, dilute chlorides, qis -concentration sulfuric acid).
Corrosion rate data (ASTM G31, dej ntsev immersion test):
Qib 1: ~ 0.002 hli / xyoo
Qib 2: ~ 0.001 hli / xyoo
Tus nqi qis dua ntawm Qib 2 qhia tau hais tias ntev dua - lub sij hawm durability.
b. Pitting thiab Crevice Corrosion Resistance
Pitting corrosion (feem ntau nyob rau hauv chloride- tej thaj chaw nplua nuj xws li dej hiav txwv los yog brine) yog tawm tsam los ntawm ob qib, tab sis Qib 2 cov ntsiab lus oxygen siab dua tuaj yeem txhim kho cov zaj duab xis passive tiv thaiv hauv zos tawg. NwsPitting peev xwm (Eₚ)yog ~ 200 mV siab dua Qib 1 ( ntsuas los ntawm kev ntsuam xyuas potentiodynamic polarization ib ASTM G5), txhais tau tias nws yuav tsum muaj qhov chaw oxidizing ntau dua los pib pitting.
Crevice corrosion (ib qho kev pheej hmoo ntawm qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khawm
c. Stress Corrosion Cracking (SCC) Resistance
Ob qib no muaj zog heev rau SCC nyob rau hauv feem ntau ib puag ncig, nrog rau chloride, hydrogen sulfide, thiab caustic daws. Txawm li cas los xij, Qib 2 lub zog siab dua me ntsis (yield zog: 275 MPa vs. Qib 1's 170 MPa) muab qhov kev tiv thaiv zoo dua rau SCC thaum nyob rau hauv kev ntxhov siab, vim cov khoom tsis tshua muaj kev cuam tshuam rau cov yas deformation uas tuaj yeem cuam tshuam cov zaj duab xis passive.
d. Kev txwv (qhov txawv yog qhov tsis txaus ntseeg)
Nyob rau hauv ib puag ncig uas txo qis heev (xws li, concentrated hydrochloric acid, hydrofluoric acid) los yog muaj zog oxidizing ib puag ncig (xws li, concentrated nitric acid> 60%), ob qib yuav corrode, thiab qhov sib txawv ntawm cov pa oxygen muaj kev cuam tshuam me ntsis -titanium alloys (piv txwv li, Qib 5 Ti-6Al-4V) lossis cov khoom tshwj xeeb (xws li tantalum)
Nyob rau hauv ultra- ib puag ncig ntshiab (xws li, dej deionized, siab - cov tshuaj purity), qhov corrosion tsis kam ntawm Qib 1 thiab Qib 2 yog ze li qhov zoo tib yam, vim tias tsis muaj cov kab mob ua rau txo qis cov yeeb yaj kiab tsis zoo.
3. Kev cuam tshuam rau kev siv
Marine Cheebtsam (hull fasteners, heat exchangers, seawater pipelines)
Cov khoom siv tshuaj ua haujlwm (reactors, li qub, fittings tuav cov kua dej corrosive)
Cov khoom siv kho mob (cov khoom cog, cov cuab yeej phais mob -qhov twg biocompatibility thiab corrosion kuj tseem ceeb heev)
Aerospace Cheebtsam (hydraulic systems, roj kab)
Ultra-cov ntawv nyias lossis foils (vim nws cov ductility ntau dua)
Tsawg- cov ntawv thov kev ntxhov siab hauv qhov chaw me me (xws li, cov khoom siv ua zaub mov, cov kav dej tshiab)
Cov ntawv thov uas xav tau ntau tshaj formability (xws li, kos duab sib sib zog nqus, complex fabrications)
4. Cov qauv siv
ASTM B265 (Standard Specification for Titanium thiab Titanium Alloy Sheet, Sawb, thiab Phaj): Qhia meej meej tias Qib 2 muaj "kev txhim kho corrosion kuj piv rau Qib 1 nyob rau hauv ib puag ncig hnyav hnyav."
TS EN ISO 5832-2 (Titanium thiab titanium alloys-Cov khoom siv ua haujlwm): faib qib 2 raws li "cov hom phiaj dav dav nrog kev txhim kho corrosion thiab lub zog dua qib 1."
