Qhov sib txawv tseem ceeb ntawm trivalent thiab hexavalent zinc plating yog tias cov txheej txheem zinc plating trivalent muaj kev ua haujlwm siab nrog kev faib tawm zoo li cov txheej txheem zinc plating hexavalent.
Zinc plating yog txheej txheem kev tiv thaiv ntau yam khoom. Nws tuaj yeem ua raws li lub tsho tiv no. Piv txwv li, yog tias peb ua zinc plating ntawm cov hlau thiab yog tias cov txheej yog khawb rau qhov chaw, ces zinc ua raws li cov khoom siv hluav taws xob los tiv thaiv cov khoom hlau sab hauv. Muaj ob hom txheej txheem zinc plating; trivalent plating thiab hexavalent plating txheej txheem. Ntawm lawv, trivalent zinc plating yog qhov tseeb.
Trivalent Zinc Plating yog dab tsi?
Trivalent zinc plating yog ib hom kev ua tiav uas siv chromium sulfate lossis chromium chloride ua cov khoom tseem ceeb. Yog li ntawd, nws yog heev environmentally friendly. Cov khoom xyaw tseem ceeb tau hais yav dhau los tsis tshua muaj tshuaj lom, thiab peb hu qhov no ua tiav cov hniav chrome plating. Nws muaj feem ntau ntawm cov yam ntxwv ntawm hexavalent zinc plating. Nws muab cov ntaub ntawv nrog rau kev tiv thaiv khawb thiab corrosion. Ntxiv mus, nws muaj ntau yam xim.
Qhov zoo ntawm cov plating no suav nrog lub peev xwm los tsim kev tiv thaiv zoo thiab ci ntsa iab ntawm qhov tam sim no siab heev, tsis tshua muaj kev ntxhov siab thiab tsis muaj qhov tso nyiaj dawb, zoo heev npog lub hwj chim, sib xws, ib puag ncig tus phooj ywg plating, thiab lwm yam.
Txawm li cas los xij, nws nyuaj rau kev tswj cov txheej txheem no thiab cov tshuaj siv tau kim heev. Lwm qhov tsis zoo yog tias cov xim tsis zoo ib yam. Qhov tseem ceeb tshaj, cov txheej yuav tsum tau siv rau ntawm qhov kub thiab txias ib ncig ntawm 30-60 ◦C.
Hexavalent Zinc Plating yog dab tsi?
Hexavalent zinc plating yog cov laus dua ntawm zinc plating. Lub npe nrov tshaj plaws rau txoj kev no yog chrome plating. Peb tuaj yeem siv cov txheej txheem no rau kev kho kom zoo nkauj thiab ua haujlwm tiav. Peb tuaj yeem ua tiav qhov tiav no los ntawm kev muab cov khoom siv substrate hauv da dej ntawm chromium trioxide (CrO3). Cov da dej no muaj sulfuric acid thiab. Cov plating no muab cov ntaub ntawv nrog corrosion thiab hnav tsis kam.
Txawm li cas los xij, txoj kev no tam sim no tau hloov los ntawm txoj kev trivalent vim nws qhov tsis zoo. Qhov tseem ceeb tshaj, cov txheej txheem no ua rau qee cov khoom pov tseg pov tseg. Piv txwv li: lead chromate, barium sulfate. Ntxiv mus, hexavalent chromium yog carcinogen. Yog li ntawd, cov txheej txheem no yog teeb meem rau ib puag ncig ib yam nkaus.
Qhov txawv ntawm Trivalent thiab Hexavalent Zinc Plating yog dab tsi?
Trivalent zinc plating yog qhov tseeb ntawm zinc plating. Cov khoom xyaw uas peb siv rau cov txheej txheem no yog chromium sulfate lossis chromium chloride. Qhov tseem ceeb, nws tsim lub tsho tiv no ntau dua thiab yog txheej txheem eco-phooj ywg. Qhov no yog qhov sib txawv tseem ceeb ntawm trivalent thiab hexavalent zinc plating. Ntawm qhov tod tes, hexavalent zinc plating yog cov laus dua ntawm zinc plating. Cov khoom xyaw uas peb siv rau cov txheej txheem no yog chromium trioxide thiab sulfuric acid. Nws tsim lub tsho tiv no tsawg dua thiab muaj kev phom sij rau ib puag ncig. Txawm li cas los xij, cov txheej txheem no tsis tshua kim, piv rau.
Summary – Trivalent vs Hexavalent Zinc Plating
Ob qhov kev ua tiav ntawm zinc plating yog trivalent thiab hexavalent zinc plating. Qhov sib txawv tseem ceeb ntawm trivalent thiab hexavalent zinc plating yog tias cov txheej txheem zinc plating trivalent muaj kev ua haujlwm siab nrog kev faib tawm zoo li cov txheej txheem hexavalent zinc plating.
