Txias galvanizing kuj hu uaelectro-galvanizing. Nws siv cov khoom siv electrolysis degrease thiab pickle cov yeeb nkab fittings thiab muab tso rau hauv cov tshuaj uas muaj zinc ntsev. Qhov tsis zoo electrode ntawm cov khoom siv electrolysis txuas nrog. Lub phaj zinc muab tso rau sab nraud ntawm cov yeeb nkab fittings thiab txuas nrog cov khoom siv electrolysis. Thaum tus ncej zoo txuas nrog lub hwj chim, ib txheej ntawm zinc yuav muab tso rau ntawm cov yeeb nkab fittings los ntawm kev siv cov kev taw qhia ntawm qhov tam sim no los ntawm tus ncej zoo mus rau tus ncej tsis zoo. Cold-plated yeeb nkab fittings yog ua ua ntej thiab ces galvanized.
Txias galvanized txheej feem ntau ua los tiv thaiv corrosion los ntawm electrochemical cov ntsiab lus. Yog li ntawd, nws yog ib qho tsim nyog los xyuas kom meej tag nrho kev sib cuag ntawm zinc hmoov thiab cov hlau los tsim ib qho electrode muaj peev xwm sib txawv, yog li kev kho saum npoo ntawm cov hlau tseem ceeb heev.
Kub-dip galvanizing yog ib txoj kev ntawm immersing steel Cheebtsam nyob rau hauv molten zinc kom tau ib tug hlau txheej. Lub workpiece yog degreased, pickled, dipped, qhuav thiab immersed nyob rau hauv molten zinc.
Steel nto kho
(1) Kev kho deg ntawm cov hlau tshiab
Ua ntej txau txias galvanizing, cov neeg kho tshuab xeb tshem tawm (xuab zeb blasting, tua blasting, thiab lwm yam) yuav tsum tau xaiv los ua kom cov hlau nto huv si ncav cuag ISO 85O1-1 qib Sa 2.5, uas yog sib npaug rau GB 8923 Sa 2.5 qib. Nws cov ntsiab lus txhais yog: "Tom qab kev tshem tawm cov hlau tsis huv, cov hlau yuav tsis muaj roj, xeb, oxide nplai thiab lwm yam av, lossis tsuas yog cov kab me me yuav nyob twj ywm; 95% ntawm cov hlau nto yuav raug cuam tshuam los ntawm cov hlau txhaj tshuaj ( xuab zeb), nthuav tawm Metallic luster. "
Rau lwm qhov taw qhia ntawm kev kho deg zoo - roughness, cov khoom txias galvanized sib txawv muaj cov kev cai sib txawv rau roughness. Nyob rau hauv cov lus qhia kev tsim kho ntawm Zinga, qhov nruab nrab roughness Ra=12.5 yuav tsum, uas yog, qhov roughness Rz=55~ 75 microns. Nyob rau hauv cov lus qhia kev tsim kho ntawm "Zinc Strong" thiab "Robalu", qhov yuav tsum tau rau roughness yog me ntsis qis, Rz=40~ 60 microns.
Yog hais tias txias galvanizing ua ib zaj duab xis ib leeg, thaum siv los tiv thaiv corrosion txheej, lub nto roughness yuav tswj tau me ntsis kom ntseeg tau tias cov txheej thickness ntawm txias galvanizing; Thaum txias galvanizing yog siv los ua cov txheej hauv qab ntawm cov txheej hnyav los tiv thaiv corrosion, tag nrho cov txheej txheej thaum lub thickness yog ntau tshaj 180 microns, thiaj li yuav xyuas kom meej lub adhesion ntawm tag nrho cov txheej, lub nto roughness Rz ntawm cov hlau yuav tsum tau. ntau dua 60 microns.
(2) Kev kho deg ntawm cov hlau qub
Nws kuj yog qhov zoo tshaj plaws los siv cov xuab zeb blasting los tshem tawm cov xim qub thiab cov xim xeb. Tseem yuav muaj qee qhov roughness ntawm cov hlau. Yog tias muaj qee yam txwv, kev sib tsoo phau ntawv thiab pneumatic (hluav taws xob) cuab yeej sib tsoo thiab xeb tshem tawm kuj siv tau. Cov txheej txheem tshem tawm xeb nce mus txog ISO 8501-1 St Theem 3, uas yog, txhais tes zoo heev thiab cov cuab yeej siv hluav taws xob tshem tawm xeb. Nws cov ntsiab lus txhais yog: "Qhov saum npoo yuav tsum tsis pub pom cov roj thiab cov av, thiab yuav luag tsis muaj cov nplai xoob, xeb, cov coatings qub thiab cov khoom txawv teb chaws. Qhov saum npoo yuav tsum muaj cov luster ntawm cov hlau substrate." Cov khoom sib txawv ntawm cov khoom txias galvanized muaj cov kev xav tau sib txawv rau qib kev kho saum npoo. Piv txwv li, Zinga hauv Belgium tso cai txog 5% ntawm cov hlau nto kom muaj qhov xeb me ntsis ua ntej pleev xim; Thaum ROVAL polishes cov hlau nto rau ST qib 3, nws tau raug sim los ntawm Tuam Tshoj Shipbuilding Technology Research Institute tias ROVAL muaj 60 ~ 80 micron (qhuav zaj duab xis tuab) Cov txheej muaj zoo heev adhesion rau hlau thiab tuaj yeem ncav cuag 6.1MPa los ntawm rub tawm. .
(3) Kev kho deg ntawm hluav taws xob welds
Hluav taws xob vuam seam yog qhov yooj yim tshaj plaws ntawm cov khoom siv hlau kom xeb. Kev xyaum tau ua pov thawj tias tom qab vuam thiab txhim kho cov khoom siv hlau nrog arc tsuag zinc (aluminium) thiab kub-dip galvanizing txheej, nws yog ib txoj hauv kev zoo thiab siv tau los kho cov welds nrog txias galvanizing. Txawm li cas los xij, ua ntej kho, qhov chaw vuam yuav tsum tau ua tib zoo tshem tawm ntawm "spatter", "welding slag" thiab "welding pa luam yeeb", tshem tawm cov roj, vuam qhov tsis zoo thiab lwm yam kab mob, thiab txhuam nws mus rau ISO 8501-1 qib 2. . Tom qab kev kho deg tiav lawm, thov thawj zaug txias galvanizing tam sim ntawd.
