熱鍍鋅也稱熱浸鍍鋅，是鋼鐵構件浸入熔融的鋅液中獲得金屬覆蓋層的一種方法。近年來隨高壓輸電、交通、通訊事業迅速發展，對鋼鐵件防護要求越來越高，熱鍍鋅需求量也不斷增加。
Hot dip galvanizing is also known as hot dip galvanizing, is a method to obtain metal coating liquid zinc immersion in molten steel component. In recent years, with the high voltage power transmission, transportation, communication cause of the rapid development, on the iron and steel protection requirements more and more high, hot dip galvanized demand will continue to increase.
     濟南熱鍍鋅層防護性能，通常電鍍鋅層厚度5～15μm，而熱鍍鋅層一般在35μm以上，甚至高達200μm。熱鍍鋅覆蓋能力好，鍍層致密，無有機物夾雜。眾所周知，鋅的抗大氣腐蝕的機理有機械保護及電化學保護，在大氣腐蝕條件下鋅層表面有ZnO、Zn(OH)2及堿式碳酸鋅保護膜，一定程度上減緩鋅的腐蝕，這層保護膜(也稱白銹)受到破壞又會形成新的膜層。
Ji'nan hot dip galvanizing layer protection performance, usually galvanized layer thickness of 5 to 15 mu m, and galvanizing layer is generally more than 35 mu m, and even up to 200 m. Hot dip galvanized coverage capability, compact coating, no organic inclusions. It is well known that the mechanism of atmospheric corrosion resistance of zinc mechanical protection and electrochemical protection, in the atmospheric corrosion of zinc layer surface under the condition of ZnO, Zn (OH) 2 and basic zinc carbonate protective film, to a certain extent slow down the corrosion of zinc, the protective film (also known as the white rust) is damaged and the formation of the new film.
     當鋅層破壞嚴重，危及到鐵基體時，鋅對基體產生電化學保護，鋅的標準電位-0.76V，鐵的標準電位-0.44V，鋅與鐵形成微電池時鋅作為陽極被溶解，鐵作為陰極受到保護，顯然熱鍍鋅對基體金屬鐵的抗大氣腐蝕能力優于電鍍鋅。
When the zinc layer is damaged seriously, endanger the iron matrix, zinc to produce electrochemical protection to the substrate, the standard potential -0.76V standard potential -0.44V zinc, iron, zinc and iron to form micro battery zinc as the anode is dissolved, iron as cathode is protected, apparently of hot galvanizing on matrix metal atmospheric corrosion resistance ability of iron is better than that of electro galvanized.
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