galvanized highway guardrail - 0 views
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stguradrail on 25 May 18A principle of hot dipped galvanized: galvanized iron to clean clean, then solvent treatment, drying after immersed in liquid zinc, iron and zinc layer of molten zinc reaction produce an alloying, the process for degreasing, washing, pickling, helps the plating - drying - hot dip galvanized, separation, cooling passivation.