I. Cov nyhuv Corrosion ntawm Acetic Acid ntawm Ntshiab Titanium
Ntshiab titanium yog cov khoom siv hlau uas muaj zog heev uas ua rau muaj ntau yam acidic, nrog rau acetic acid. Hydrogen ions hauv acetic acid tuaj yeem ua ke nrog oxygen atoms ntawm qhov chaw ntawm titanium ntshiab los tsim cov yeeb yaj kiab titanium oxide tiv thaiv. Txawm li cas los xij, thaum cov acetic acid concentration siab dhau lawm, cov yeeb yaj kiab tiv thaiv no raug rhuav tshem, nthuav tawm cov ntshiab titanium rau acetic acid thiab ua rau corrosion.
II. Yog vim li cas rau Acetic Acid Corrosion ntawm Ntshiab Titanium
Lub ntsiab yog vim li cas rau acetic acid corrosion ntawm ntshiab titanium yog kev puas tsuaj ntawm titanium oxide tiv thaiv zaj duab xis. Hydrogen ions hauv acetic acid tuaj yeem cuam tshuam nrog titanium oxide los tsim dej thiab acetate ions, tso tawm electrons. Cov electrons no tuaj yeem tsim ib txheej hydrogen ion rau ntawm cov titanium ntshiab, ua rau corrosion.
III. Yuav ua li cas tiv thaiv Acetic Acid Corrosion ntawm Ntshiab Titanium
Txhawm rau tiv thaiv acetic acid corrosion ntawm ntshiab titanium, peb tuaj yeem siv cov kev ntsuas hauv qab no:
1. Tswj cov acetic acid concentration. Tsim nyog tswj cov concentration ntawm acetic acid, tsis txhob muaj ntau ntau, tuaj yeem txo qhov kev puas tsuaj rau titanium oxide tiv thaiv zaj duab xis.
2. Xaiv qhov purity tsim nyog. Xaiv qib siab -purity titanium txo cov impurities thiab txhim kho nws cov corrosion kuj.
3. Ntxiv kev kho deg. Ntxiv cov yeeb yaj kiab tiv thaiv, xws li plating lossis electrochemical oxidation, rau saum npoo ntawm titanium ntshiab tuaj yeem txhim kho nws cov corrosion kuj.
Hais txog kev xaiv cov khoom siv, ASTM B265 tus qauv qhia tau hais tias kev lag luam ntshiab titanium (Gr2) yog tsim rau acetic acid ib puag ncig nrog kub qis dua 150℃thiab concentrations hauv qab 40%. Rau qhov xav tau ntau dua, titanium-palladium alloys (xws li Gr7 thiab Gr11) yuav tsum tau siv. Qhov sib ntxiv ntawm palladium hloov tus kheej -corrosion peev xwm ntawm cov hlau los ntawm 200-300 mV, txhim kho qhov ruaj khov ntawm cov yeeb yaj kiab passivation.
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