Consultant Electroplating & Formulator Finishing since 1968 · 4y ·
You can clean galvanized metal with mild alkaline chemicals . Caustic soda should not be in excess or almost negligible .
Na metasilicate , Tri sodium polyphosphate ,Sada ash , sodium bicarbonate can be used . Nonionic surfactant with ethylene oxide - 8 are good .
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