Thaum lub Titanium Sheath rhaub yog siv los boil ib 5% Sodium Tartrate tov ntawm 103 degree, Vim li cas lub Tartrate Ion Complex Titanium Ions thiab tiv thaiv rov qab, ua rau Uniform Corrosion ntawm 0.2 hli ib xyoo?

The tartrate ion (C4H4O6 2-) is a powerful chelating agent for titanium in 5% sodium tartrate at 103 °C. Tartrate creates soluble titanium tartrate complexes unlike chloride or fluoride (which lead to pitting) Ti4+ + 3C4H4O6 2- ->[Ti(C4H4O6)3] 4- Nyob rau hauv qhov complexation Ti4+ ions yog scavenged los ntawm qhov chaw raws li lawv yog generated kom tsis txhob muaj zog passive zaj duab xis yuav raug tsim. Thaum tsis muaj txheej tiv thaiv, titanium corrodes uniformly ntawm tus nqi ruaj khov ntawm 0.15 mus rau 0.25 hli hauv ib xyoos yam tsis muaj qhov chaw pitting.

Corrosion Rate vs Tartrate Concentration (Quantitative)

103℃(kub)

Sodium Tartrate Concentration (%) Corrosive Rate (mm/yr) Pom ntawm Deg Mechanism
0 (tsuas yog dej) 0.005-0.010Bright Passive 1 0.03-0.06Light etching Mixed light etching 3 0.08–0.15Etching uniform Complexing
5 0.15–0.25 Matte Complexation uniform dominating
10 0.20–0.35 Uniformity of matteness Strong complexation Influence of Temperature and pH

Kub℃pH 5% Tartrate Corrosion Rate mm/xyoo
60 7 0.04–0.08 80 7 0.08–0.15 100 7 0.15–0.25 100 9 0.10–0.18 100 5 0.20–0.35
Engineering tswv yim.

Nco ntsoov tias tsis tu ncua corrosion yog lub luag haujlwm tseem ceeb rau cov tshuaj sodium tartrate ntawm qhov kub thiab txias. Siv cov phab ntsa tuab (2.0-2.5 hli) kom them nyiaj rau corrosion. Tsis muaj txiaj ntsig hauv kev siv qib 7 titanium vim tias palladium tsis cuam tshuam rau kev sib xyaw ntawm tartrate. Tus engineer paub lub complexation mechanism ntawm tartrate thiab xaiv cov phab ntsa thickness kom zoo corrosion.