Rau Titanium Sheath rhaub siv los rhaub A 5% Sodium Tartrate tov ntawm 103 degree, Vim li cas Lub Tartrate Ion Complex Titanium Ions Thiab Tiv Thaiv Repassivation, Ua Rau Cov Txheej Txheem Corrosion Ntawm 0.2 hli Ib Xyoo?
Tso lus
Hauv 5% sodium tartrate ntawm 103 degree, tartrate ion (C₄H₄O₆²⁻) yog ib qho muaj zog chelating tus neeg sawv cev rau titanium. Tsis zoo li chloride lossis fluoride uas ua rau pitting, tartrate forms soluble titanium-tartrate complexes: Ti⁴⁺ + 3C₄H₄O₆²⁻ → [Ti(C₄H₄O₆)₃]⁴⁻. Qhov complexation no tshem tawm Ti⁴⁺ ions los ntawm qhov chaw raws li lawv tau tsim, tiv thaiv kev tsim ntawm cov yeeb yaj kiab ruaj khov. Yog tsis muaj kev tiv thaiv zaj duab xis, titanium corrodes uniformly ntawm tus nqi tsis tu ncua ntawm 0.15-0.25 hli hauv ib xyoos, tsis muaj pitting hauv zos.
Quantitative Corrosion Rate vs. Tartrate Concentration
Ntawm 103℃(boiling):
| Sodium Tartrate Concentration (%) | Corrosion Rate (mm / xyoo) | Nto Zoo | Mechanism |
|---|---|---|---|
| 0 (tsuas yog dej) | 0.005–0.010 | Ci ntsa iab | Passive |
| 1 | 0.03–0.06 | Lub teeb etching | Mixed |
| 3 | 0.08–0.15 | Uniform etching | Kev nyuaj siab |
| 5 | 0.15–0.25 | Uniform matte | Complexation tseem ceeb |
| 10 | 0.20–0.35 | Uniform matte | Kev nyuaj siab heev |
Qhov cuam tshuam ntawm Kub thiab pH
| Kub (degree) | 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 |
Kev pom zoo engineering
Rau sodium tartrate cov kev daws teeb meem ntawm qhov kub thiab txias, txais kev txhim kho corrosion raws li cov txheej txheem tseem ceeb. Siv cov phab ntsa tuab (2.0-2.5 hli) los muab kev tiv thaiv corrosion. Qib 7 titanium tsis muaj qhov zoo dua vim tias tartrate complexation tsis cuam tshuam los ntawm palladium. Los ntawm kev nkag siab txog tartrate's complexation mechanism, tus engineer xaiv cov phab ntsa tuab tsim nyog rau kev sib xyaw corrosion.
