Rau Titanium Heat Qws siv los rov ua dua 30% Sodium Thiocyanate Solution Ntawm 80 degree, Thiocyanate Anion Yuav Ua Li Cas Thiaj Tsis Muaj Cov Tshuaj Chloride-Induced Pitting?
Tso lus
Nyob rau hauv 30% sodium thiocyanate (NaSCN) ntawm 80 degree, thiocyanate anions (SCN⁻) adsorb heev rau ntawm titanium nto, tsim ib qho kev tiv thaiv. Thaum muaj cov tshuaj chloride ions, SCN⁻ sib tw rau qhov chaw saum npoo. Vim tias SCN⁻ muaj qhov adsorption ntau dua li Cl⁻, nws tshem cov tshuaj chloride los ntawm qhov chaw, tiv thaiv chloride-induced pitting. Qhov inhibition efficiency nce nrog SCN⁻ concentration. Ntawm SCN⁻ / Cl⁻ molar piv saum toj no 2, pitting yog kiag li suppressed.
Quantitative Pitting Inhibition los ntawm SCN⁻
Rau kev daws nrog 1,000 ppm Cl⁻ ntawm 80 degree:
| SCN ⁻ Concentration (ppm) | SCN⁻/Cl⁻ Molar Ratio | Pitting Ceev (qhov / cm²) | Qhov siab tshaj plaws qhov tob (µm) |
|---|---|---|---|
| 0 | 0 | 50–150 | 200–500 |
| 500 | 0.5 | 10–30 | 50–100 |
| 1,000 | 1.0 | 2–10 | 10–30 |
| 2,000 | 2.0 | 0 | 0 |
| 5,000 | 5.0 | 0 | 0 |
Inhibition Efficiency vs. Kub
| Kub (degree) | Yam tsawg kawg SCN⁻/Cl⁻ Kev Tiv Thaiv kom tiav |
|---|---|
| 40 | 0.8 |
| 60 | 1.2 |
| 80 | 2.0 |
| 100 | 3.0 |
Kev pom zoo engineering
Rau cov tshuaj chloride- muaj cov kev daws teeb meem ntawm 80 degree, tswj qhov SCN⁻/Cl⁻ molar piv saum toj 2.0 kom tiv thaiv pitting. Los ntawm kev siv thiocyanate raws li kev sib tw adsorbate, tus kws ua haujlwm tiv thaiv titanium cua sov los ntawm chloride-induced pitting.
