Passivation Kev Kho Mob Ntawm Flange
Jun 27, 2022
Kev kho mob ntawm flange yog hais txog qhov corrosion ntawm steel phaj thiab lwm yam hlau ua flanges yuav txo qis tom qab tau kho nrog oxidizing nruab nrab, uas yog kev kho mob ntawm flanges. Vim qhov no feature, ntau flange buyers yuav xav tau flanges passivated. Lub hauv paus ntsiab lus passivation ntawm flange tuaj yeem piav qhia tsuas yog los ntawm zaj duab xis txoj kev xav, uas yog, nws tau txiav txim siab tias passivation yog vim muaj kev cuam tshuam ntawm cov khoom siv raw ntawm flange thiab oxidizing nruab nrab, uas ua rau nyias nyias, ntom, zoo them passivation zaj duab xis uas tuaj yeem ua tau. yuav ruaj khov rau saum npoo hlau. Cov yeeb yaj kiab no tshwm sim raws li theem kev ywj pheej, feem ntau yog qhov sib xyaw ntawm oxygen thiab hlau. Nws ua lub luag haujlwm ntawm kev sib cais ntawm cov hlau los ntawm qhov nruab nrab corrosive, tiv thaiv kev sib cuag ncaj qha ntawm cov hlau thiab corrosive nruab nrab, yog li cov hlau yeej tsis yaj thiab ua rau lub xeev passive kom ua tiav cov txiaj ntsig ntawm kev tiv thaiv corrosion. Passivation txheej txheem ntawm flange loj tuaj yeem muab faib ua cov txheej txheem ntub dej thiab cov txheej txheem qhuav. Nws tuaj yeem muab faib ua ntau hom. Cov nyhuv passivation ntawm flanges loj nyob ntawm ob qho tib si cov txheej txheem passivation thiab cov khoom flange loj nws tus kheej. Cov kev cuam tshuam tshwj xeeb muaj xws li cov ntsiab lus muaj nyob hauv cov flanges loj, cov qauv metallographic ntawm stainless hlau, kev ua haujlwm ntawm stainless hlau, thiab lwm yam. Ntawm cov ntsiab lus, chromium thiab npib tsib xee yog cov ntsiab lus muaj zog passivation, ua raws li cov hlau. Yog li ntawd, qhov siab dua cov ntsiab lus ntawm chromium thiab npib tsib xee, lub zog muaj zog ntawm cov hlau tsis muaj zog. Austenitic thiab ferritic loj flanges muaj cov qauv zoo ib yam thiab zoo passivation. Martensitic stainless hlau yog ntxiv dag zog los ntawm kev kho cua sov, thiab nws cov qauv metallographic yog multiphase qauv, yog li cov passivation tsis muaj zog.
