external anti corrosion layer 外防腐层
layer corrosion 层状腐蚀 ; [化工] 层间腐蚀
corrosion product layer 腐蚀产物层
corrosion prevention layer 防腐层
Metallic coatings, eg. Zinc electrical plating surface: Anti-Corrosion layer.
金螺丝属表层、和表面，如电镀锌金属表面的防腐层。
NG pipeline needs to be covered with anti-corrosion layer and plus cathode protect, to delay its corrosion.
敷设的天然气管道表面除做防腐层外还需加入阴极保护，以延缓腐蚀速度。
The anticorrosive project process give the handling method of concrete surface, the construction method of waterproof filtering layer and anti-corrosion layer, etc.
防腐施工工艺介绍了混凝土表面的处理方法、防水过渡层的施工方法、防腐层的施工方法等。
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