Ua rau ntawm dub me me rau lub ci ci galvanized cov txheej tom qab passivation

Cov tsos ntawm cov pob dub ntawm galvanized coating ntawm ci kub-dip galvanized steel kav yog feem ntau yog vim tias tooj liab, thiab arsenic tam sim no hauv cov galvanized. Raws li cov neeg ua haujlwm hla dhau, cov kev cuam tshuam no ua tau pom raws li dub me ntsis. Tsis tas li ntawd, chromium oxide tsim los ntawm kev txo ntawm cov chromic acid tshwm los ntawm cov tshuaj tiv thaiv ntawm cov tshuaj tiv thaiv chromic acid thiab hlau zoo li xim av. Thaum ob lub tebchaw sib xyaw ua ke, lawv tig xim dub (qhia tias qhov kev daws teeb meem tau muaj hnub nyoog). Yog hais tias lub galvanized txheej tsis tau yaug tom qab passivation, thaj ua rau thaj dub yuav nyob hauv nws qhov chaw.