Pretreatment rau Electrostatic Hmoov Txheej Kab: Zinc Phosphating vs. Hlau Phosphating

Zinc-Based phosphating

• Core Advantages:

1. Strong Corrosion Resistance: The dense phosphating film structure, combined with powder coating, provides outstanding corrosion resistance;
2. Cov txheej txheem Mature: Haum rau loj - nplai automated ntau lawm kab, nrog cov yeeb yaj kiab siab ruaj khov, zoo tagnrho rau cov qauv tsim.

• Core Disadvantages:

1. Tus nqi siab: Cov tshuaj phosphating thiab cov tshuaj pleev xim rau saum npoo yog kim; nruab nrab-kub (50-70 degree) kev kho mob yuav tsum tau ua kom sov lub zog.
2. Cov txheej txheem nyuaj: Yuav tsum tau ntxiv "txheej txheej saum npoo av" kauj ruam.
3. High Environmental Pressure: Muaj cov hlau hnyav xws li zinc thiab npib tsib xee; dej khib nyiab yuav tsum tau kho tshwj xeeb.

Hlau-Based Phosphating

• Core Zoo

1. Tsis tshua muaj nqi: Tsawg raw khoom nqi; tsis tas yuav tsum tau deg conditioning agent.
2. Cov txheej txheem yooj yim heev: Tsis muaj qhov yuav tsum tau ua kom txias qhov chaw; Cov txheej txheem yog "degreasing → dej ntxuav → phosphating → dej ntxuav," nrog rau kev ua haujlwm tsis zoo.
3. Ib puag ncig tus phooj ywg thiab yooj yim los tuav: Tsis muaj cov hlau hnyav xws li zinc thiab npib tsib xee; Kev kho dej khib nyiab yog yooj yim.
4. Tsawg kub thiab txuag hluav taws xob: Zaj duab xis tuaj yeem tsim ntawm chav tsev kub (20-35 degree) tsis muaj cua sov, txuag hluav taws xob.

• Core Disadvantages

1. Tsis muaj zog Corrosion Resistance: Cov phosphating zaj duab xis yog ntxeem tau, haum rau qhuav nyob rau hauv ib puag ncig, tab sis nws yuav rusting sab nraum zoov.