Poukisa yon aparèy chofaj Immersion Titàn ak yon zòtèy poli soude (faktè konsantrasyon estrès)<1.2) Outlast An As-Welded Joint (SCF >3) Pa yon faktè 5 nan yon sistèm pwoteksyon katodik dlo lanmè 90 degre?
Kite yon mesaj
Nan yon sistèm pwoteksyon katodik dlo lanmè 90 degre, aparèy chofaj Titàn yo sijè a tou de atak korozivite ak frajilman idwojèn. Zòtèy soude a se yon rejyon ki gen gwo konsantrasyon estrès. Kòm-jinti soude yo gen yon faktè konsantrasyon estrès (SCF) nan 3-5, pandan y ap zòtèy soude poli diminye SCF a<1.2. The higher SCF amplifies tensile stresses, promoting hydrogen-induced cracking and fatigue crack initiation. Reducing SCF by polishing extends service life by a factor of 5.
Lavi Fatig Kantitatif vs Faktè Konsantrasyon Estrès
Pou Klas 2 Titàn nan dlo lanmè 90 degre ak pwoteksyon katodik (-0.85 V vs Ag/AgCl):
| Kondisyon zòtèy soude | SCF | Cycles pou krak Inisyasyon | Lavi ki gen rapò ak jan-soude |
|---|---|---|---|
| Kòm-soude, antay byen file | 4–5 | 10,000–30,000 | 1× |
| Kòm-soude, mwayèn | 3–4 | 20,000–50,000 | 1.5× |
| Tè lis | 1.5–2 | 50,000–150,000 | 3× |
| Poli (mekanik) | 1.2–1.5 | 80,000–200,000 | 4× |
| Elektwopolis (SCF<1.2) | <1.2 | 150,000–300,000 | 5–7× |
Efè Potansyèl Pwoteksyon Katodik sou Enpak SCF
| Potansyèl CP (V vs Ag/AgCl) | Kòm-Lavi soude (sik) | Poli lavi (sik) | Rapò lavi |
|---|---|---|---|
| -0.80 | 100,000–200,000 | 500,000–1,000,000 | 5× |
| -0.85 | 30,000–60,000 | 150,000–300,000 | 5× |
| -0.90 | 10,000–20,000 | 50,000–100,000 | 5× |
| -0.95 | 5,000–10,000 | 25,000–50,000 | 5× |
Soude zòtèy Gid fini
| Severite Sèvis | Egzije Weld Toe Fini | Sib SCF | Te espere amelyore lavi fatig |
|---|---|---|---|
| sik ki ba (<10,000 total) | Kòm-soude | <4 | 1× |
| Sik modere (10,000-50,000) | Tè lis | <2 | 3× |
| Sik segondè (50,000-200,000) | Poli | <1.5 | 4× |
| Very high cycle (>200,000) | Electropolished | <1.2 | 5–7× |
Rekòmandasyon Jeni
Pou aparèy chofaj Titàn nan dlo lanmè katodik pwoteje nan 90 degre, presize ke tout zòtèy soude yo dwe tè lis ak electropolished pou reyalize SCF.<1.2. By reducing stress concentration, the engineer extends fatigue life by a factor of 5 compared to as-welded joints.
