研究了螺纹钢在经冷却剂CQ、水或空气冷却后的耐蚀性能。室外大气暴露实验和干湿交替循环加速腐蚀实验表明,采用试剂CQ冷却的螺纹钢耐蚀性能明显优于水和空气冷却的。XRD、SEM和TPR结果表明,冷却剂对螺纹钢大气腐蚀产物的物相组成无影响,但影响其相对含量,从而改变锈层保护性系数。水冷、空冷和CQ冷螺纹钢的锈层保护性系数分别为0.23、0.27和0.43。因此,试剂CQ冷却的螺纹钢在大气腐蚀过程中生成了相对稳定致密的锈层,从而减缓了腐蚀反应的进行,对螺纹钢起一定的保护作用。
Corrosion resistance of water-cooled rebar,air-cooled rebar and the rebar cooled by a cooling agent CQ was studied.The atmospheric exposure test and wet/dry cyclic accelerated corrosion test show the corrosion resistance of rebar cooled by CQ agent is better than that by water and air obviously.The results of XRD,SEM and TPR indicate that the cooling agents do not affect the phase constitution of atmospheric corrosion products but their relative content,which makes the value of the protective ability index of rust layer changed.The values are about 0.23,0.27 and 0.43 for water-cooled,air-cooled and CQ-cooled rebar,respectively.Therefore,the rebar cooled by CQ agent generates a relatively stable and compact rust layer that reduces corrosion and plays some role in protecting the rebar from atmospheric corrosion.
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