Corrosion ua rau cov yeeb nkab steel
Yog tias corrosion tshwm sim nyob rau hauv cov yeeb nkab steel, nws yuav cuam tshuam rau daim ntawv thov ntawm cov yeeb nkab steel thiab nce tus nqi ntawm kev lag luam. Corrosion ntawm cov yeeb nkab steel tuaj yeem muab faib ua plaub yam, thiab cov hauv qab no yuav yog cov lus qhia tshwj xeeb rau koj.
1. Intergranular corrosion. Nws hais txog corrosion raws qhov dislocation, uas rhuav tshem cov kev sib txuas ntawm cov muaju. Qhov zoo ntawm corrosion no muaj teeb meem heev, nws yuav ua rau cov yeeb nkab steel nkig los yog poob lub zog compressive, yooj yim heev ua rau muaj kev nyab xeeb. Intergranular corrosion yog qhov tseem ceeb corrosion hom ntawm martensitic steel yeeb nkab. Nws yog vim qhov sib txawv ntawm cov muaj pes tsawg leeg los yog nyob rau hauv-situ kev nyuaj siab ntawm lub dislocation cheeb tsam thiab crystallization, uas ua rau kom pom tseeb txo cov electrode muaj peev xwm nyob rau hauv lub dislocation cheeb tsam thiab qhov sib txawv ntawm electrode muaj peev xwm.
2. Symmetrical corrosion. Qhov no txhais tau hais tias tag nrho cov kav hlau uas raug corrosive ntuj ib puag ncig yuav muaj tshuaj hloov pauv thiab raug kev txom nyem symmetrical corrosion. Hom corrosion no tuaj yeem ntsuas qhov ntsuas qhov corrosion thiab kwv yees qib corrosion. Raws li kev ntsuas qhov tseeb, qhov kev nyab xeeb thiab kev pabcuam lub neej tuaj yeem raug teeb tsa. Yog li ntawd, nyob rau hauv ntau hom corrosion, symmetrical corrosion tsis yog ib qho kev pheej hmoo, qhov corrosion ntawm symmetrical corrosion feem ntau yog raws li qhov zoo ntawm cov yeeb nkab steel thiab txo cov thickness ntawm cov yeeb nkab steel kom raug ntsuas thiab kwv yees qhov kev soj ntsuam. Nyob rau hauv ib puag ncig ib puag ncig tshwj xeeb, steel yeeb nkab symmetrical corrosion tus nqi qis heev, kev pab cuam lub neej ntev, tsis tshua muaj nqi tu.
3. Pom corrosion. Nws yog ib hom kev puas tsuaj uas tshwm sim hauv qee qhov chaw ntawm cov hlau nto ntawm cov yeeb nkab steel. Tom qab crevice corrosion tshwm sim, nws muaj peev xwm sai sai tsim ib tug nyiam mus tob los ntawm cov yeeb nkab steel. Point corrosion yog qhov teeb meem heev, tshwj xeeb tshaj yog rau ntau cov hlab ntsha siab. Tom qab corrosion, nws yuav tsum tau polished los yog pleev xim tam sim ntawd kom tsis txhob muaj corrosion ntxiv.
