Qhov sib txawv ntawm Galvanizing, Cadmium Plating, Chromium Plating, thiab Nickel Plating ntawm Hlau Yeeb Nkab Round Steel

Dab tsi yog qhov sib txawv ntawm zinc plating, cadmium plating, chromium plating, thiab npib tsib xee plating ntawm cov yeeb nkab steel thiabsteel ibr?

1.Galvanizing

Cov yam ntxwv: Zinc kuj ruaj khov nyob rau hauv cov huab cua qhuav thiab tsis yooj yim discolored.Nyob rau hauv cov dej thiab cov huab cua ntub, nws hnov ​​​​mob nrog oxygen los yog carbon dioxide los tsim oxides lossis alkaline zinc carbonate zaj duab xis, uas tuaj yeem tiv thaiv zinc los ntawm kev txuas ntxiv mus rau oxidize thiab ua lub luag haujlwm tiv thaiv.Zinc yog qhov cuam tshuam rau corrosion hauv acids, alkalis, thiab sulfides.Galvanized txheej feem ntau raug kev kho mob passivation.Tom qab passivation nyob rau hauv chromic acid los yog chromate tov, cov tsim passivation zaj duab xis tsis yooj yim cuam tshuam los ntawm huab cua ntub, zoo heev txhim kho nws lub peev xwm los tiv thaiv corrosion.Rau qhov chaw caij nplooj ntoos hlav, nyias-walled qhov chaw (phab ntsa thickness <0.5m), thiab steel qhov chaw uas yuav tsum tau muaj zog txhua yam, yuav tsum tau muab tshem tawm hydrogen, thaum tooj liab thiab tooj liab alloy qhov chaw yuav tsis xav tau hydrogen tshem tawm.Zinc plating muaj tus nqi qis, ua haujlwm yooj yim, thiab tau txais txiaj ntsig zoo.Tus qauv peev xwm ntawm zinc yog qhov tsis zoo, yog li zinc plating yog txheej anodic ntawm ntau cov hlau.Daim ntawv thov: Galvanizing yog dav siv nyob rau hauv atmospheric tej yam kev mob thiab lwm yam dej siab ib puag ncig.Tab sis nws yuav tsum tsis txhob siv los ua ib qho kev sib txhuam

2.Cadmium plating

Cov yam ntxwv: Rau qhov chaw uas nkag mus rau hauv cov huab cua hauv hiav txwv lossis dej hiav txwv, thiab hauv dej kub siab tshaj 70 ℃, cadmium plating yog qhov ruaj khov, muaj zog corrosion kuj, zoo lubrication, thiab dissolves maj mam hauv dilute hydrochloric acid.Txawm li cas los xij, nws yog ib qho yooj yim soluble hauv nitric acid, insoluble hauv alkali, thiab nws cov oxides kuj insoluble hauv dej.Cadmium txheej yog softer dua zinc txheej, nrog tsawg hydrogen brittleness thiab muaj zog adhesion.Ntxiv mus, nyob rau hauv tej yam kev mob ntawm electrolysis, lub tau txais cadmium txheej yog zoo nkauj dua li zinc txheej.Tab sis cov roj uas tsim los ntawm cadmium thaum lub sij hawm melting yog tshuaj lom, thiab soluble cadmium ntsev kuj yog tshuaj lom.Nyob rau hauv tej yam kev mob, cadmium yog ib tug cathodic txheej ntawm hlau, thiab ib tug anodic txheej nyob rau hauv marine thiab high-temperature atmospheres.Daim ntawv thov: Nws yog tsuas yog siv los tiv thaiv qhov chaw ntawm atmospheric corrosion los ntawm seawater los yog zoo li ntsev tov thiab saturated seawater vapor.Ntau qhov chaw hauv aviation, navigation, thiab hluav taws xob kev lag luam, cov dej ntws, thiab cov xov xov yog plated nrog cadmium.Nws tuaj yeem polished, phosphated, thiab siv los ua xim substrate, tab sis tsis tuaj yeem siv los ua cov tais diav.

3.Chrome plating

Cov yam ntxwv: Chromium ruaj khov heev hauv cov huab cua ntub, alkaline, nitric acid, sulfide, carbonate cov ntsiab lus, thiab cov organic acids, thiab yooj yim soluble hauv hydrochloric acid thiab kub concentrated sulfuric acid.Nyob rau hauv qhov kev txiav txim ntawm ncaj qha tam sim no, yog tias cov chromium txheej siv los ua anode, nws yooj yim soluble hauv caustic soda tov.Cov txheej chromium muaj zog adhesion, siab hardness, 800-1000V, zoo hnav tsis kam, muaj zog lub teeb pom kev zoo, thiab kub kub kuj.Nws tsis hloov xim hauv qab 480 ℃, pib oxidize saum 500 ℃, thiab txo hardness ntawm 700 ℃.Nws qhov tsis zoo yog tias chromium yog ib qho nyuaj, nkig, thiab nws yooj yim rau detachment, uas yog ntau pronounced thaum raug alternating cuam tshuam loads.Thiab nws muaj porosity.Hlau chromium yog yooj yim passivated nyob rau hauv huab cua los ua ib tug passivation zaj duab xis, yog li hloov lub peev xwm ntawm chromium.Yog li ntawd, chromium dhau los ua cathodic txheej ntawm hlau.Daim ntawv thov: ncaj qha plating chromium rau saum npoo ntawm cov hlau raws li cov txheej txheem tiv thaiv corrosion tsis zoo, thiab feem ntau ua tiav los ntawm ntau txheej electroplating (xws li tooj liab plating → nickel → chromium) kom ua tiav lub hom phiaj ntawm kev tiv thaiv xeb thiab kho kom zoo nkauj.Tam sim no, nws tau siv dav hauv kev txhim kho qhov hnav tsis kam ntawm qhov chaw, kho qhov ntev, lub teeb pom kev, thiab cov teeb pom kev zoo nkauj.

npib tsib xee plating

Cov yam ntxwv: Nickel muaj cov tshuaj lom neeg ruaj khov zoo hauv cov huab cua thiab cov tshuaj alkaline, tsis yooj yim discolored, thiab tsuas yog oxidized ntawm qhov kub siab tshaj 600 ° C. Nws dissolves qeeb hauv sulfuric acid thiab hydrochloric acid, tab sis yooj yim soluble hauv dilute nitric acid.Nws yog ib qho yooj yim rau passivate nyob rau hauv concentrated nitric acid thiab yog li ntawd muaj zoo corrosion kuj.Nickel txheej muaj siab hardness thiab yooj yim rau siv.

New Gapower Metal Lub tuam txhab tshwj xeeb hauv kev muab chrome plated, galvanized, npib tsib xee plated steel kav thiab round steels.Lub tuam txhab muaj Tshuag ntawm 20000 tons ntawm round steel kav.Peb tuaj yeem muab ntau yam kev qhia tshwj xeeb ntawm cov kav hlau, cov kav dej puag ncig, cov kav hlau polished, thiab polished shafts, suav nrog Asmeskas, German, Japanese, thiab European qauv.Txais tos nug.