摘要
以NaCl+NaHSO3为腐蚀介质,通过浸渍干湿复合循环实验及腐蚀失重分析,并利用SEM,XRD和FTIR技术,研究了Q235碳钢和P265GH低合金钢的大气腐蚀行为。结果表明,两种钢的腐蚀遵从相同的动力学规律,腐蚀产物中均存在大量致密的α-FeOOH和非晶态δ-FeOOH,锈层具有很好的保护性,使得腐蚀速率降低。实验开始阶段两种钢的腐蚀量基本相同,但随着腐蚀的进行两者差距增大,P265GH低合金钢较Q235碳钢的失重小、锈层致密、耐腐蚀性好。
The corrosion behavior of P265GH low alloy steel and Q235 carbon steel under dry/humid/immersion alternative condition with NaCl and NaHSO3 were investigated by SEM, XRD, FTIR and mass loss analysis. The results show that, the relationship of mass loss to test time for the two steels fits to the same dynamics law. The corrosion products contain a large amount of dense α-FeOOH and amorphous δ-FeOOH. The resistance of rust layer make corrosion rate of the two steels decrease. The mass loss of the two steels is almost the same in the beginning stage, the difference of the mass loss become large with test time. The P265GH low alloy steel exhibited lower mass loss, denser rust layer, and better corrosion resistance rather than Q235 carbon steel.
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2014年第1期53-58,共6页
Journal of Chinese Society For Corrosion and Protection
基金
国家电网科技项目(KG12K16004)
沈阳市科技计划项目(F11-264-1-61)资助
关键词
钢
大气腐蚀
加速腐蚀实验
腐蚀产物分析
steel, atmospheric corrosion, accelerated corrosion test, corrosion product analysis
