Yuav ua li cas tshem tawm rusted ntws plug
Nyob rau hauv lub neej niaj hnub, peb feem ntau ntsib qhov teeb meem uas cov roj ntws plug yog xeb, tej zaum vim hais tias lub threaded lub qhov yog xeb thiab tag nrho cov tivthaiv yog tuag, nws yog heev teeb meem rau tshem tawm cov roj ntws plug thiab unscrew nws. Yog li, koj puas paub dab tsi ua rau nws xeb? Peb yuav tsum daws qhov teeb meem no li cas?
Muaj ib zaug ib rooj plaub ntawm xeb tsis ua hauj lwm tsom xam ntawm threaded qhov, thiab yog vim li cas rau xeb ntawm threaded qhov tau soj ntsuam los ntawm ib tug kws tshaj lij pom. Qhov no threaded qhov yog machined los ntawm tapping. Thaum lub sij hawm machining, cov ntaub ntawv workpiece raug tshem tawm los ntawm kev txiav tsis tu ncua. Tom qab cov khoom tau muab khaws cia rau 20 hnub, cov threaded qhov pib xeb, pom tau tias muaj ib yam dab tsi tsis ncaj ncees lawm nrog cov qauv. Tom qab kev soj ntsuam ntawm cov ntu ntawm qhov threaded, nws tau pom tias yog vim li cas rau xeb yog tias cov txheej txheem tapping roj muaj cov ntsiab lus S thiab Cl. Cov qhov no tso cai rau lub substrate raug ncaj qha rau huab cua. Thaum Cl absorbs dej, nws tsim ib qho electrolyte, ua rau autocatalytic electrochemical corrosion ntawm Cl-ions. Tsis tas li ntawd, Cl- yuav tsis noj tag nrho cov tshuaj tiv thaiv corrosion, uas ntxiv txhawb kev txhim kho corrosion hauv qhov tob.
Hauv qhov no, cov txheej txheem tsim khoom ua rau xeb, thiab lwm yam tuaj yeem ua rau xeb. Yog li yuav tiv thaiv thiab ua li cas nrog nws?
1. Derusting: Cov txheej txheem derusting tsis yog tsuas yog ib txoj hauv kev ua ntej ua ntej pleev xim, tab sis kuj yog tsom. Qhov no yog vim hais tias qee qhov workpieces yog lub zog siab bolts thiab txiv ntseej thiab lub zog siab stamping qhov chaw, thiab hydrogen embrittlement yuav tshwm sim tom qab pickling, uas cuam tshuam rau cov khoom zoo. (Faj seeb: Nyob rau hauv cov ntaub ntawv ntawm disregarding hydrogen embrittlement, pickling yuav siv tau rau xeb tshem tawm pretreatment, tshwj xeeb tshaj yog rau cov txee thiab tswj txee panels, thiab lwm yam. Tab sis nyob rau hauv tus txheej txheem, tshwj xeeb yuav tsum tau saib xyuas kom tsis txhob nqa lub pickling residue rau hauv lub plating tank. , thiaj li tsis ua kom cov zinc chrome plating tov.)
2. Txheej: yog hais txog txoj kev siv cov txheej txheem sib npaug ntawm qhov chaw ntawm lub workpiece. Raws li cov kev xav tau zoo sib txawv ntawm cov khoom ua haujlwm thiab cov khoom, cov txheej txheem sib txawv yog siv. Feem ntau, muaj peb txoj kev: dip txheej, tshuaj tsuag txheej, thiab txhuam txheej.
