本页关键词：耐候板
耐候板在大气中的生锈原理[中英文对照]
The principle of weathering in the atmosphere
耐候板在腐蚀初期，表面生成的锈层较碳钢致密，裂纹和孔洞相对较少;25d后碳钢和耐候钢局部都出现了分层现象，腐蚀产物没有区别，差别主要是锈层中合金元素的作用。耐候板锈层中有Cu、Cr合金元素的析出，聚集在裂纹处可抵御大气中水气及其有害离子的侵入，防止基体金属进一步腐蚀。从而达到耐大气腐蚀的作用！
Weathering steel in the early period of corrosion, the surface of the rust layer produced more compact than carbon steel, cracks and holes are relatively small; 25d after the carbon steel and weathering steel parts have been layered phenomenon, the corrosion product is not different, the difference is mainly in the role of alloy elements. Weathering steel rust layer in the Cr, Cu alloy elements of the precipitation, the crack can be gathered in the atmosphere of water vapor and its harmful ions intrusion, preventing further corrosion of the matrix metal. So as to achieve the effect of atmospheric corrosion! |
