摘要
通过室外大气暴晒试验和电化学腐蚀试验,研究了建筑用新型耐候钢09Mn Cu PTi RE的大气初期腐蚀行为,并进行了腐蚀形貌、腐蚀产物组成和Tafel曲线的测试与分析。结果表明,在SO2含量低于10ppm的室外大气中,该耐候钢的质量变化率在第10天趋于稳定,而在SO2含量为40~60ppm的室外大气中,其质量变化率在第21天趋于稳定;室外大气暴晒后的腐蚀产物由Fe SO4·7H2O和γ-Fe OOH组成;与未通入SO_2的5wt%Na Cl电解液相比,在通入90 ppm SO2的5wt%Na Cl中其腐蚀电位负移了169 m V。
The corrosion behavior during initial atmospheric exposure of 09MnCuPTiRE new-type weathering steel for building was researched by atmospheric exposure and electrochemical corrosion, and the corrosion topography, chemical composition of corrosion products and Tafel curves were tested. The results show that when the content of SO2 is less than 10ppm in the atmosphere, the mass change rate tends towards stability after atmospheric exposure for 10 days, and when the content of SO2 is between 40ppm and 60ppm in the atmosphere, the mass change rate tends towards stability after atmospheric exposure for 21 d. Besides, the corrosion product is composed of FeSO4·7H2O and y-FeOOH. Moreover, compared with the electrolyte of 5wt%NaCl without SO：, the electrolyte with 90ppmSO2 could change the corrosion potential of the weathering steel from 169mV to negative position.
出处
《热加工工艺》
CSCD
北大核心
2015年第8期82-84,共3页
Hot Working Technology
