Electroplating yog ib txoj hauv kev uas cov hlau yog precipitated los ntawm electrolyte los ntawm qhov kev txiav txim ntawm ib tug thov tam sim no thiab tso rau saum npoo ntawm cov khoom kom tau ib tug hlau npog txheej.
Galvanized:
Zinc yog yooj yim corroded nyob rau hauv acids, alkalis, thiab sulfides.Zinc txheej feem ntau yog passivated.Tom qab passivation hauv cov tshuaj chromate, cov zaj duab xis passivation tsim tsis yooj yim rau kev cuam tshuam nrog huab cua noo, thiab muaj peev xwm tiv thaiv corrosion zoo heev.Hauv huab cua qhuav, zinc yog qhov ruaj khov thiab tsis yooj yim hloov xim.Nyob rau hauv dej thiab av noo, nws reacts nrog oxygen los yog carbon dioxide los tsim oxide lossis alkaline carbonic acid zaj duab xis, uas tuaj yeem tiv thaiv zinc los ntawm kev txuas ntxiv mus rau oxidize thiab ua lub luag haujlwm tiv thaiv.
Cov khoom siv: steel, hlau qhov chaw
chrome:
Chromium yog ruaj khov heev nyob rau hauv huab cua ntub, alkali, nitric acid, sulfide, carbonate daws thiab organic acids, thiab yog yooj yim soluble nyob rau hauv hydrochloric acid thiab kub concentrated sulfuric acid.Qhov tsis zoo yog qhov nyuaj, nkig, thiab yooj yim poob tawm.Direct chromium plating rau saum npoo ntawm cov hlau raws li cov txheej txheem tiv thaiv corrosion tsis zoo tagnrho.Feem ntau, ntau txheej electroplating (xws li tooj liab plating → nickel → chromium) tuaj yeem ua tiav lub hom phiaj ntawm kev tiv thaiv xeb thiab kho kom zoo nkauj.Tam sim no, nws yog dav siv los txhim kho qhov hnav tsis kam ntawm qhov chaw, kho qhov loj me, lub teeb pom kev zoo thiab kho kom zoo nkauj.
Cov ntaub ntawv siv tau: ferrous hlau, tooj liab thiab tooj liab alloy xoom hniav chrome plating, hnav-resistant chrome plating
Tooj plating:
Tooj liab tsis ruaj khov hauv huab cua, thiab tib lub sijhawm, nws muaj peev xwm zoo thiab tsis tuaj yeem tiv thaiv lwm cov hlau los ntawm corrosion.Txawm li cas los xij, tooj liab muaj cov hluav taws xob hluav taws xob zoo, cov txheej tooj hlau plating yog nruj thiab zoo, nws tau ruaj khov ua ke nrog cov hlau yooj yim, thiab nws muaj kev ua haujlwm zoo polishing. lwm yam electroplating, ua ib txheej tiv thaiv kom tsis txhob carburization, thiab kom txo tau kev sib txhuam los yog kho kom zoo nkauj ntawm cov kabmob.
Cov ntaub ntawv siv tau: dub hlau, tooj liab thiab tooj liab alloy nickel-plated, chrome-plated hauv qab txheej.
Nickel plating:
Nickel muaj tshuaj lom neeg ruaj khov nyob rau hauv cov huab cua thiab lye, thiab tsis yooj yim los hloov xim, tab sis nws yooj yim soluble hauv dilute nitric acid.Nws yog ib qho yooj yim rau passivate hauv concentrated nitric acid, thiab nws qhov tsis zoo yog porosity.Txhawm rau kov yeej qhov tsis zoo no, siv ntau txheej hlau plating, thiab npib tsib xee yog txheej nruab nrab.Cov nickel plating txheej muaj siab hardness, yooj yim rau polish, muaj lub teeb pom kev zoo thiab tuaj yeem ua rau kom pom thiab ua haujlwm, thiab muaj kev tiv thaiv corrosion zoo.
Cov ntaub ntawv siv tau: tuaj yeem tso rau saum npoo ntawm ntau yam ntaub ntawv, xws li: steel-nickel-based alloys, zinc-based alloys, aluminium alloys, iav, ceramics, plastics, semiconductors thiab lwm yam ntaub ntawv
Tin plating:
Tin muaj tshuaj lom neeg ruaj khov.Nws tsis yooj yim rau yaj hauv dilute daws ntawm sulfuric acid, nitric acid thiab hydrochloric acid.Sulfides tsis cuam tshuam rau tin.Tin kuj tseem ruaj khov hauv cov organic acids, thiab nws cov tebchaw tsis muaj tshuaj lom.Nws yog dav siv hauv kev lag luam ntim khoom noj khoom haus thiab cov khoom siv hauv aviation, navigation thiab xov tooj cua.Nws tuaj yeem siv los tiv thaiv cov xov tooj hlau los ntawm kev cuam tshuam los ntawm leej faj hauv cov roj hmab thiab ua cov txheej txheem tiv thaiv rau qhov chaw tsis muaj nitriding.
Cov ntaub ntawv siv tau: hlau, tooj liab, aluminium thiab lawv cov alloys
Tooj liab tin alloy:
Copper-tin alloy electroplating yog rau phaj tooj liab-tin alloy ntawm qhov chaw tsis muaj npib tsib xee plating, tab sis ncaj qha chromium plating.Nickel yog cov hlau tsis tshua muaj nqi thiab muaj nuj nqis.Tam sim no, tooj liab-tin alloy electroplating yog dav siv hauv kev lag luam electroplating los hloov cov nickel plating, uas muaj peev xwm tiv thaiv corrosion zoo.
Cov khoom siv: steel qhov chaw, tooj liab thiab tooj liab alloy qhov chaw.
Post lub sij hawm: Apr-03-2023