1. Cov yam ntxwv yam ntxwv ntawm cov lus luv luv ua tsis tau ua tiav?
Tam sim ntawd kev tawg nrog nyias-edged, ntses-lub qhov ncauj qhib qhia minimal nplai tsim. Feem ntau cov khoom ua kom haum nrog cov phab ntsa tseem ceeb uas nyob ze qhov tawg. Cov ntsuas kub ntau tshaj qhov tseem ceeb hloov pauv hloov pauv, ua rau cog qoob loo. Feem ntau tshwm sim los ntawm kev thaiv kev txaus lossis dej qis. Kev kaw tam sim ntawd yuav tsum tau los tiv thaiv kev puas tsuajcading kev puas tsuaj rau txoj hlab uas nyob ib sab.
2. Npaum li cas hydrogen embrittlement manifest hauv tub boiles?
Nyab pob txha lov nrog minimal yas deformation, feem ntau nyob ze Welds lossis khoov. Cov ntawv kuaj me me qhia pom cov qauv sib txuas. Cuam tshuam nrog cov pher dej tsis txaus (hauv qab 7) thiab nquag corrosion. Tuaj yeem pom txog kev npau taws ntawm cov chaw sab hauv uas atomic hydrogen nkag mus. Kev tiv thaiv yuav tsum tau tswj kev tswj hwm ntawm cov tshuaj lom roj ntsha thiab cov pa oxygen.
3. Dab tsi ua rau muaj kev ntxhov siab corrosion tawg hauv ustenitic stainless hlau leeg?
Chloride-induced cracking occurs at temperatures above 60°C with tensile stress. Cracks propagate perpendicular to applied stresses, often branching. Sensitized material (from welding) is particularly vulnerable. Requires both chlorides (>10 ppm) thiab oxygen los pib. Mitigation suav nrog kev tswj cov tshuaj chloride ntau qib thiab siv cov qhab nia ruaj khov (piv txwv li 321, 347).
4. Koj tuaj yeem paub qhov txawv ntawm kev yaig thiab corrosion puas tsuaj?
Yaig ua kom du, tapered nyias qauv tom qab ntws kev taw qhia. Corrosion tsim ntau yam tsis xwm yeem, pitted cov chaw nrog oxide txheej. Yaig feem ntau qhia qhov tshwj xeeb grooves los ntawm particle cuam tshuam. Kev tsom xam metallurgical qhia tawm cov kos npe sib txawv. Ua ke Yutosion-corrosion cov khoom pov thawj cov yam ntxwv ntawm ob qho kev siv tshuab.
5. Dab tsi yog cov theem ntawm kev nkag tsis ua tiav hauv cov tub thuv boiles?
Theem 1: Pib deformation nrog tus nqi tuab me ntsis. Theem 2: Lub xeev ruaj khov nrog kev tawm tsam tas li. Theem 3: Txav nrawm nrawm ua kom tawg. Macroscopic Voids daim foos ntawm cov ciaj ciam av hauv theem kawg. Kev hloov pauv micrivenural suav nrog carbide coarsening thiab subgrains tsim.
