Pre-plating txheej txheem:
Alkali: Rau cov roj muaj kuab paug nyob rau saum npoo ntawm qee cov kav hlau, kev kho alkaline yog ua tiav.
Purmium: Purmake nrog hydrochloric acid lossis lwm cov kua qaub kom tshem tawm cov oxide ntawm cov yeeb nkab steel.
Yaug: Yaug ob zaug kom tshem tawm cov kua qaub seem thiab hlau ntsev txuas rau saum npoo ntawm cov yeeb nkab steel.
Immersion tus neeg saib xyuas: Siv tus neeg sawv cev melting kom tshem tawm tag nrho cov impurities ntawm cov yeeb nkab steel los xyuas kom meej tias cov yeeb nkab steel thiab zinc kua tuaj yeem raug ntxuav thiab tiv tauj, tsim cov txheej txheem zoo.
