Cov neeg feem coob xav tias stainless hlau yog cov khoom siv hlau uas yuav tsis xeb thiab acid thiab alkali resistant.Tab sis nyob rau hauv lub neej niaj hnub, tib neeg pom tias stainless hlau lauj kaub thiab hluav taws xob kettles siv rau ua noj ua haus feem ntau muaj cov pob zeb los yog xeb.Qhov tseeb yog dab tsi?
Cia peb nkag siab ua ntej, stainless hlau yog dab tsi?
Raws li lub teb chaws tus qauv GB / T20878-2007 "Stainless Steel thiab Heat-Resistant Steel Qib thiab Tshuaj Chemical", lub ntsiab lus ntawm stainless hlau yog: stainless hlau thiab corrosion kuj raws li lub ntsiab yam ntxwv, nrog ib tug chromium ntsiab lus tsawg kawg yog 10.5%. thiab cov ntsiab lus carbon tsis ntau tshaj 1.2%.hlau.Hom uas tiv taus cov tshuaj tiv thaiv corrosion media (acid, alkali, ntsev, thiab lwm yam) yog hu ua acid-resistant steel.
Yog li vim li cas stainless hlau resistant rau corrosion?
Vim tias cov hlau tsis muaj steel, tom qab tsim, yuav dhau los ua kom tiav cov khoom noj thiab kev ua kom tshem tawm txhua yam roj, xeb thiab lwm yam av ntawm qhov chaw.Lub saum npoo yuav dhau los ua cov khoom siv tsis zoo, sib sau ua ke thiab ua rau muaj yeeb yaj kiab passivation, yog li txo qhov tsis kam ntawm cov hlau tsis xeb ntawm oxidizing tshaj tawm.Nruab nrab corrosion tus nqi thiab txhim kho corrosion kuj.
Yog li nrog xws li ib zaj duab xis passivation ntawm stainless hlau, nws puas yuav tsis xeb?
Qhov tseeb, hauv peb lub neej niaj hnub, cov tshuaj chloride ions hauv cov ntsev muaj kev puas tsuaj rau cov yeeb yaj kiab tsis zoo ntawm cov hlau tsis muaj steel, uas tuaj yeem ua rau nag lossis daus ntawm cov hlau.
Tam sim no, theoretically, muaj ob hom kev puas tsuaj rau cov zaj duab xis passivation los ntawm chlorine ions:
1. Theem zaj duab xis txoj kev xav: chloride ions muaj lub vojvoog me me thiab muaj peev xwm nkag mus tau zoo.Lawv tuaj yeem nkag mus tau yooj yim ntawm qhov sib txawv me me hauv oxide zaj duab xis, ncav cuag cov hlau nto, thiab cuam tshuam nrog cov hlau los ua cov sib xyaw ua ke, uas hloov cov qauv ntawm oxide zaj duab xis.
2. Adsorption txoj kev xav: Chloride ions muaj peev xwm ua tau zoo adsorbed los ntawm hlau.Lawv tuaj yeem raug adsorbed los ntawm cov hlau nyiam thiab tshem tawm cov pa oxygen los ntawm cov hlau nto.Chloride ions thiab oxygen ions sib tw rau cov ntsiab lus adsorption ntawm cov hlau nto thiab tsim cov tshuaj chloride nrog cov hlau;Cov adsorption ntawm chloride thiab hlau yog tsis ruaj khov, tsim cov tshuaj soluble, uas ua rau kom ceev corrosion.
Rau kev kuaj xyuas stainless hlau:
Kev tshuaj xyuas stainless hlau tau muab faib ua rau 6 qhov kev xeem ua haujlwm thiab ob txoj haujlwm tsom xam
Kev Ntsuas Kev Ua Haujlwm:
Lub cev muaj zog, tshuaj muaj zog, cov khoom siv kho tshuab, kev ua haujlwm, kev tshuaj xyuas metallographic thiab kev tshuaj xyuas tsis muaj kev puas tsuaj
Qhov project tsom xam:
Kev tsom xam pob txha, kev txheeb xyuas corrosion, thiab lwm yam;
Ntxiv nrog rau cov qauv siv los paub qhov txawv ntawm GB / T20878-2007 "Stainless Steel thiab Heat-Resistant Steel Qib thiab Cov Khoom Siv Tshuaj", kuj tseem muaj:
GB/T 13305
GB/T 13671
GB/T 19228.1, GB/T 19228.2, GB/T 19228.3
GB / T 20878 Stainless hlau thiab kub-resistant steel qib thiab tshuaj muaj pes tsawg leeg
Lub teb chaws tus qauv rau zaub mov-qib stainless hlau tshuaj xyuas yog GB9684-2011 (cov khoom siv stainless hlau).Kev tshuaj xyuas cov zaub mov qib stainless hlau tau muab faib ua ob ntu: cov ntaub ntawv tseem ceeb thiab cov khoom tsis yog cov khoom tseem ceeb.
Yuav ua haujlwm li cas:
1. Kev Kos Npe: Kev ntsuam xyuas stainless hlau yuav tsum tau kos qhov kawg ntawm cov khoom kuaj nrog cov xim sib txawv.
2. Kev luam ntawv: Cov txheej txheem ntawm cov tshuaj tsuag pleev xim rau ntawm qhov chaw (qhov kawg, lub ntsej muag kawg) tau teev tseg hauv kev tshuaj xyuas, qhia txog qib, tus qauv, kev qhia tshwj xeeb, thiab lwm yam ntawm cov khoom siv.
3. Tag: Tom qab kev tshuaj xyuas tiav, cov khoom yuav muab tso rau hauv cov pob khoom, lub thawv, thiab cov ncej los qhia nws qib, qhov loj me, qhov hnyav, tus lej tus qauv, tus neeg muag khoom, thiab lwm yam.
Post lub sij hawm: Dec-27-2023