Lub Tube Phab Ntsa Thickness Measurement Frequency (Txhua Xyoo Vs. Peb Hlis) Yuav Ua Li Cas Rau Ib Lub Titanium Sheath Heater Hauv 50% Phosphoric Acid Ntawm 100℃cuam tshuam qhov tshwm sim ntawm kev kuaj lub qhov ua ntej perforation?
Tso lus
Hauv 50% phosphoric acid ntawm 100 degree, Qib 2 titanium nthuav tawm cov corrosion tsis sib xws ntawm 0.08-0.15 hli hauv ib xyoos tab sis kuj raug kev txom nyem qee zaum pitting ntawm 0.3-0.8 hli hauv ib xyoos. Qhov tshwm sim ntawm kev kuaj xyuas lub qhov ua ntej nws perforates lub raj phab ntsa yog nyob ntawm kev soj ntsuam zaus. Kev tshuaj xyuas ib xyoos tsis nco cov pits uas pib thiab loj hlob mus rau perforation ntawm kev soj ntsuam. Kev tshuaj xyuas peb lub hlis twg nce kev tshawb pom qhov tshwm sim los ntawm 40-60% mus rau 80-95%.
Quantitative Detection Probability vs. Inspection Interval
Rau 1.5 hli phab ntsa nrog qhov propagation tus nqi ntawm 0.5 hli ib xyoo:
| Kev soj ntsuam ncua sij hawm | Qhov loj hlob ntawm kev soj ntsuam (mm) | Kev kuaj pom tshwm sim | Perforation Risk |
|---|---|---|---|
| 12 lub hlis (ib xyoos twg) | 0.5 | 40–60% | Siab |
| 6 hli | 0.25 | 70–85% | Nruab nrab |
| 3 lub hlis (lub hlis twg) | 0.125 | 85–95% | Tsawg |
| 1 hli | 0.04 | >98% | Tsawg heev |
Kev soj ntsuam zaus Guide
| Uniform Corrosion Rate (mm / xyoo) | Pit Propagation Rate (mm/xyoo) | Pom zoo soj ntsuam zaus | Kev kuaj pom tshwm sim |
|---|---|---|---|
| <0.10 | <0.3 | Txhua xyoo | 60–80% |
| 0.10–0.15 | 0.3–0.5 | Peb lub hlis twg | 85–95% |
| 0.15–0.20 | 0.5–0.8 | Txhua hli | >95% |
| >0.20 | >0.8 | Kev soj ntsuam tas li | N/A |
Kev pom zoo engineering
Rau 50% phosphoric acid ntawm 100 degree, qhia meej peb lub hlis twg ultrasonic thickness daim ntawv qhia ntawm cov kab sib txuas ruaj khov. Los ntawm kev tshuaj xyuas ntau zaus los ntawm ib xyoos mus rau peb lub hlis twg, tus kws tshaj lij txhim kho qhov kev tshawb pom qhov tshwm sim los ntawm 60% mus rau 90%, tiv thaiv kev tsis txaus ntseeg.
