Equipment built for hot-dip galvanizing surface processing covers enclosed pretreatment units, flux recycling devices and centrifuges to handle steel rust, grease and residual zinc. Closed pretreatment setups integrate pickling, cleaning and fluxing steps to eliminate surface contaminants and strengthen zinc coating adhesion, cutting harmful volatile emissions. Flux reprocessing units adopt circulation treatment with hydrogen peroxide and ammonia to separate iron hydroxide sludge through oxidation, neutralization and filter pressing, restoring flux liquid for repeated use and lowering waste discharge. Centrifugal gear removes excess zinc evenly to deliver consistent coating thickness and smooth finished surfaces. All machinery follows eco-friendly production standards, supporting customized processing capacity to match different galvanizing line throughput and environmental protection demands.