Rau Titanium Tshav Kub Kub Siv los rov ua kom sov 30% Sodium Thiocyanate Solution ntawm 80 degree, Thiocyanate Anion Yuav Ua Li Cas Thiaj Li Tiv Thaiv Chloride-Induced Pitting?

Thiocyanate anions (SCN⁻) tam sim no nyob rau hauv 30% sodium thiocyanate (NaSCN) ntawm 80℃muaj zog adsorb rau titanium nto thiab tsim muaj kev tiv thaiv thaiv. SCN- sib tw rau qhov chaw saum npoo av uas muaj chloride ions. SCN- muaj adsorption affinity ntau dua li Cl- thiab yog li nws tshem cov tshuaj chloride ntawm qhov chaw thiab yog li tiv thaiv cov chloride tsim pitting. Qhov inhibitory efficiency nce nrog qhov concentration ntawm SCN- ions. Rau SCN⁻ / Cl⁻ molar piv saum toj 2, lub pitting yog tag nrho suppressed.

Quantitative Inhibition of Pitting los ntawm SCN-

Rau kev daws ntawm 1000 ppm Cl - ntawm 80 C:

SCN- Concentration (ppm) SCN-/Cl- Molar Ratio Pitting Density (pits/cm2) Maximum Pit Depth (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 nrog kub

Kub (degree) Yam tsawg kawg SCN- / Cl- Qhov sib piv rau kev tiv thaiv tiav
Kev pom zoo engineering 40 0.8 60 1.2 80 2.0 100 3.0

Txhawm rau kom tsis txhob pitting hauv cov tshuaj chloride uas muaj cov tshuaj, SCN-/Cl- molar ratio yuav tsum khaws cia siab tshaj 2.0 ntawm 80 degree. Tus engineer tiv thaiv pitting ntawm titanium heaters los ntawm chlorides los ntawm kev siv thiocyanate raws li kev sib tw adsorbate.