AF1410高强度钢大气腐蚀试验研究

目的研究AF1410高强度铜在北京地区大气环境中腐蚀特点和腐蚀规律。方法通过AF1410高强度铜的自然大气暴露试验，利用质量损失分析、断面分析、表面分析和电化学分析等方法分析试样。结果AF1410高强度钢在北京大气环境中腐蚀速率在腐蚀初期随腐蚀产物厚度的增加而逐步减小；随着暴露时间的延长，腐蚀产物由于厚度增加，以及其它环境因素的综合作用，导致其开裂直至脱落，腐蚀速率增加；之后又随腐蚀产物厚度增加，腐蚀速率减小。试样在暴露5年后，腐蚀产物厚度增加，腐蚀开裂、脱落现象明显加重。结论AF1410高强度钢在北京大气环境中腐蚀速率呈现反复升降的过程。

Atmospheric Exposure Test of AF1410High-strength Steel

Objective To study the atmospheric corrosion characteristics and rules of AF1410high-strength steel.Methods Through the study of natural atmospheric exposure test, the samples were analyzed using the weight loss analysis, image processing, section analysis, electrochemical Methods and so on.ResultsThe corrosion rate of AF1410 high-strength steel decreased as the thickness of corrosion products increased in the initial corrosion stage. As the exposure time increased, the internal stress of the rust layer increased because of the thickness of corrosion products increased, this situation led to cracking of the rust layer until falling off, and the corrosion rate increased at this point.Later the corrosion rate decreased with the increase in the thickness of the corrosion products. For the samples exposed for 5years, the thickness of corrosion products increased, and the phenomenon of corrosion cracking and local falling off increased.Conclusion The corrosion rate of AF1410high-strength steel showed an undulation process.