Phosphating yog cov txheej txheem ntawm kev tsim cov tshuaj phosphate hloov dua siab tshiab los ntawm cov tshuaj lom neeg thiab cov tshuaj electrochemical, thiab cov phosphate conversion film hu ua phosphating film. Lub hom phiaj tseem ceeb ntawm phosphating yog los tiv thaiv lub hauv paus hlau thiab tiv thaiv cov hlau los ntawm corroded mus rau ib qho twg; Siv rau priming ua ntej painting los txhim kho cov adhesion thiab corrosion kuj ntawm cov xim zaj duab xis; Siv los txo cov roj zaj duab xis lubrication thaum lub sij hawm hlau txias ua hauj lwm txheej txheem.
Phosphating yog ib hom kev kho mob uas feem ntau siv ua ntej. Nyob rau hauv txoj cai, nws yuav tsum tau mus rau chemical conversion membrane kev kho mob. Tsuav nws tau siv rau phosphating ntawm cov hlau, cov hlau tsis muaj hlau xws li txhuas thiab zinc kuj tuaj yeem siv rau phosphating. Cov txheej txheem ntawm immersing ib tug workpiece (steel, aluminium, los yog zinc) nyob rau hauv ib tug phosphating tov (qee acidic phosphate raws li kev daws teeb meem) thiab tso ib txheej ntawm insoluble crystalline phosphate hloov dua siab tshiab zaj duab xis rau saum npoo yog hu ua phosphating.
Blackening yog ib hom kev kho cua sov hlau. Lub hauv paus ntsiab lus yog los tsim ib txheej ntawm oxide zaj duab xis ntawm cov hlau nto kom cais cov huab cua thiab ua tiav lub hom phiaj ntawm kev tiv thaiv xeb. Thaum cov tsos mob yuav tsum tsis siab, kev kho blackening tuaj yeem siv tau. Qhov saum npoo ntawm cov hlau yog xim dub, qee qhov hu ua xiav. Bluing kev kho mob yog ib qho tshuaj kho qhov chaw. Nws lub luag haujlwm tseem ceeb yog los ua cov yeeb yaj kiab dense oxide nyob rau ntawm qhov chaw ua haujlwm thiab xeb, thiab txhim kho cov coj tsis kam ntawm lub workpiece. Tsuas yog kev kho saum npoo yuav tsis cuam tshuam rau cov qauv sab hauv. Nws tsis yog kev kho cua sov, nws yog qhov txawv ntawm quenching.
Lub zog muaj zog bolts siv phosphating, uas tuaj yeem zam cov teeb meem hydrogen embrittlement. Yog li ntawd, bolts saum qib 10.9 hauv kev lag luam feem ntau siv phosphating nto kho. Blackening + oiling yog txheej nrov rau kev lag luam fasteners vim nws yog qhov pheej yig tshaj plaws thiab zoo li ua ntej siv roj. Vim nws blackening, nws yuav luag tsis muaj peev xwm tiv thaiv xeb, yog li nws yuav xeb sai sai yam tsis muaj roj.
Yog xav paub ntxiv txog cov ntsia hlau drywall, thov hu rau peb.
Post lub sij hawm: Jun-19-2023