Kev lag luam tshuaj yog ib qho tseem ceeb tshaj plaws ntawm daim ntawv thov kev lag luam ntawm 316 stainless hlau hluav taws xob cua sov raj. Kev tsim tshuaj lom neeg muaj ntau yam kev tshaj tawm corrosive thiab kev ua haujlwm nyuaj, uas muab cov kev xav tau siab rau kev tiv thaiv corrosion thiab kev ntseeg siab ntawm cov khoom siv cua sov. Raws li kev xeb dav dav- cov khoom siv tiv taus, 316 stainless hlau tuaj yeem ua tau raws li cov kev xav tau cua sov ntawm cov txheej txheem tshuaj lom neeg me thiab nruab nrab, thiab siv dav hauv cov tshuaj zoo, tshuaj tshuaj, dej kho thiab lwm yam haujlwm.
Lub corrosion ib puag ncig ntawm kev lag luam tshuaj muaj cov yam ntxwv ntawm ntau haiv neeg thiab complexity. Cov tshuaj lom neeg sib txawv muaj cov txheej txheem sib txawv kiag li rau cov hlau tsis muaj steel. Oxidizing acids xws li nitric acid thiab sulfuric acid muaj txiaj ntsig los tswj cov yeeb yaj kiab tsis zoo ntawm cov hlau tsis zoo ntawm qhov tsim nyog; txo cov kua qaub xws li hydrochloric acid thiab hydrofluoric acid yog corrosive heev rau 316; alkaline cov kev daws teeb meem feem ntau tsis tshua muaj corrosive nyob rau hauv chav tsev kub, tab sis tus nqi corrosion yuav nce ho nyob rau hauv high kub; ntsev tov uas muaj chloride ions yog feem ntau ua rau pitting corrosion ntawm 316 stainless hlau. Tsis tas li ntawd, yam xws li kub, siab, ntws tus nqi thiab impurities yuav cuam tshuam qhov tseeb corrosion tus nqi.
Nyob rau hauv cov txheej txheem tshuaj raug siv, 316 stainless hlau cua sov tubs qhia txawv adaptability. Rau dilute nitric acid, dilute sulfuric acid thiab lwm yam oxidizing acid ib puag ncig hauv qab 50 degree, 316 muaj corrosion kuj zoo thiab tuaj yeem siv tau ntev. Rau feem ntau cov kuab tshuaj organic thiab cov organic acid daws xws li acetic acid thiab citric acid, 316 cov khoom muaj peev xwm. Nyob rau hauv alkaline kua cua sov txheej txheem xws li sodium hydroxide thiab poov tshuaj hydroxide, 316 yuav siv tau rau lub sij hawm ntev hauv qab no 80 degree, tab sis siab dua kub yuav tsum tau xyuam xim rau kev nyuaj siab corrosion. Hauv brine thiab ntsev tov cua sov tshuab, 316 tsuas yog siv tau rau qis-kev sib zog thiab qis- qhov kub thiab txias, thiab siab dua- cov ntaub ntawv qib siab yuav tsum raug xaiv rau siab -concentration brine.
Rau cov kev cai tshwj xeeb ntawm kev lag luam tshuaj, 316 cua sov raj xav tau cov qauv tsim. Ua ntej, lub siab thiab sealing yuav tsum tau - chemical ntau lawm feem ntau muaj cov hlab ntsha siab, thiab cov cua kub yuav tsum tau ua kom tau raws li cov qauv ntawm cov hlab ntsha siab thiab siv cov qauv sealing txhim khu kev qha. Thib ob, tawg-cov ntaub ntawv pov thawj - rau cov cua kub uas muaj hluav taws xob thiab cov xov xwm tawg, tawg- cov ntaub ntawv pov thawj cua sov thiab cov qauv hluav taws xob yuav tsum raug xaiv. Thib peb, kev kho deg - rau kev ua hauj lwm tej yam kev mob uas yooj yim rau scale thiab crystallize, electrolytic polishing kev kho mob yuav raug xaiv los txo scaling thiab pab tu. Plaub, cov khoom siv qib - rau lub sijhawm uas muaj ntau qhov sib txuas thiab cov kev xav tau corrosion siab, 316L qis-carbon version yuav tsum nyiam dua.
Nyob rau hauv cov nqe lus ntawm kev saib xyuas thiab kev tswj lub neej, tshuaj cua sov tshuab yuav tsum tsim kom muaj kev soj ntsuam xyuas cov txheej txheem. Tsis tu ncua ntsuas cov phab ntsa tuab ntawm cov cua sov raj kom taug qab tus nqi corrosion; tsis tu ncua ntxuav thiab passivate kom muaj kev ncaj ncees ntawm cov zaj duab xis passive; hloov qhov chaw tsis zoo nyob rau lub sijhawm raws li qhov xav tau ntawm kev pabcuam lub neej kom tsis txhob muaj kev kaw haujlwm uas tsis tau npaj los ntawm kev ua tsis tiav tam sim ntawd. Rau kev ua haujlwm hnyav, lub tshuab ua haujlwm seem tuaj yeem tsim kho kom ruaj khov.
Table 1 Kev Siv tau ntawm 316 Stainless Steel Heating Tubes nyob rau hauv Hom Tshuaj Media
表格
| Chemical Medium | Concentration Range | Qhov kub thiab txias | 316 Kev siv tau | Kev xaiv tswv yim |
|---|---|---|---|---|
| Dilute Nitric Acid | <50% | <60°C | Zoo heev | Standard 316 yog txaus |
| Dilute sulfuric acid | <30% | <50°C | Zoo | Ua tib zoo saib xyuas cov kev hloov pauv |
| Hydrochloric acid | <5% | Chav kub | pluag | Tsis pom zoo, siv PFA / titanium |
| Sodium hydroxide | <30% | <80°C | Zoo | 316L pom zoo rau cov qauv vuam |
| Acetic Acid / Organic Acid | Feem ntau cov concentration | <80°C | Zoo heev | Ntau yam kev siv |
| Brine / NaCl Solution | <3% | <40°C | Nruab nrab | 316L + electrolytic polishing |
| Organic Solvents | Feem ntau hom | <150°C | Zoo heev | Kev ua haujlwm ruaj khov heev |
Kev xaiv tsim nyog thiab kev saib xyuas tus qauv raws li cov yam ntxwv ntawm cov tshuaj lom neeg tuaj yeem ua rau lub neej ua haujlwm siab tshaj plaws ntawm 316 stainless hlau cua sov raj.
