Electroplated Galvanized Chromium Zaj duab xis ntawm Hluav Taws Xob Hluav Taws Xob: Ib Lub Tshuab Kho Nto Tshiab los hloov Electroplating

Electroplated Galvanized Chromium Zaj duab xis ntawm Hluav Taws Xob Hluav Taws Xob: Ib Lub Tshuab Kho Nto Tshiab los hloov Electroplating

Corrosion tiv thaiv mechanism

Zinc chromium zaj duab xis yog ib zaj duab xis tiv thaiv peb sab uas ua ke nrog kev tiv thaiv, passivation, thiab tiv thaiv electrochemical, raws li pom hauv daim duab 1:

1) Cov nyhuv shielding: Ib qho kev sib xyaw ua ke ntawm chromium oxide thiab zinc thiab aluminium oxide nyob nruab nrab ntawm cov hlau thiab raug rau sab nraud ntawm cov hlau. Cov oxide no muaj kev ruaj ntseg zoo nyob rau hauv nruab nrab corrosive media thiab tuaj yeem ua haujlwm raws li kev tiv thaiv kev sib cais.

2) Passivation: Feem ntau, passivation tsuas yog tsim ib zaj duab xis nyias nyias ntawm qhov chaw yuav tsum tau kho. Hauv kev kho Dacromet, zinc hmoov, txhuas hmoov thiab chromic acid react passively. Tom qab txheej thiab ci, zinc hmoov, txhuas hmoov thiab amorphous khoom chromic acid complex yog superimposed txheej los ntawm txheej los ua ib tug multilayer passivation zaj duab xis. Qhov no passivation yog ib qho kev passivation ntawm zinc, aluminium thiab puag hlau nyob rau hauv tag nrho cov txheej.

3) Kev tiv thaiv Cathodic: Lub peev xwm electrode ntawm zinc thiab txhuas yog qis dua li ntawm cov hlau. Thaum cov txheej hauv zos puas los yog raus hauv corrosive media, zinc aluminium poob electrons raws li lub anode ntawm corrosive micro roj teeb thiab yog corroded, thaum lub hauv paus hlau yog tag nrho tiv thaiv raws li cathode.

2.2 Kev ua tau zoo ntawm zinc chromium zaj duab xis

1) Txheej nyias: Lub thickness ntawm zinc chromium zaj duab xis txheej yog feem ntau ntawm lO thiab 14 microns.

2) Tsis muaj hydrogen embrittlement: txheej txheej txheej tsis siv cov kua qaub ntxuav kom tsis txhob muaj qhov tshwm sim ntawm hydrogen embrittlement.

3) Cov cua kub zoo, tuaj yeem siv txog 300 degree.

4) Nws tsis muaj kuab paug rau ib puag ncig thiab muaj kev huv huv ntawm cov khoom ua haujlwm, ua rau nws muaj cov txheej txheem ntsuab thiab ib puag ncig zoo.

5) Kev tiv thaiv corrosion zoo heev, feem ntau yog 7-10 zaus ntawm cov tsoos electroplating.

6) Composite txheej tuaj yeem siv tau.

7) Zoo permeability thiab sib sib zog nqus plating muaj peev xwm.

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