flowchart TD A[钢铁工件] --> B["预处理
(清洗,酸洗,助镀)"] B --> C["浸泡于450°C
熔融锌液"] C --> D[取出冷却] D --> E["形成多层结构的
致密镀锌层"] E --> F subgraph F[核心防腐蚀原理] direction LR G[屏障保护] --> H["致密的锌层
物理隔离钢铁与腐蚀环境"] I[阴极保护] --> J["锌作为"牺牲阳极"
优先腐蚀以保护钢铁基体"] end
Hot dip galvanizing (HDG) is the process of immersing steel workpieces that have undergone pre-treatment (cleaning, pickling, and plating assistance) into a molten zinc solution at approximately 450 ° C, and forming a dense zinc iron alloy coating on the surface of the workpiece through iron zinc reaction and diffusion.
