氯盐类融雪剂污染及其腐蚀作用的初步研究

观察长春市主要街道使用融雪荆后残雪中某些元素的变化以及融雪剂对铺设该街道混凝土方砖的溶蚀作用。方法在降雪并撒布融雪荆后，采集长春市5条主要街道的雪样，测定样品的pH值及Cl^-、Na^＋、Ca^2＋、Mg^2＋、K^＋含量，并不同浓度融雪剂浸溃混凝土方砖，观察20天内的溶蚀作用。结果使用融雪荆的雪水中离子的浓度平均值明显高出对照样品（P〈0．01），而pH值明显下降（P〈0．01）；浓度为10％的融雪剂在20天时可出现混凝土方砖腐蚀作用。20％的融雪剂溶液腐蚀作用最明显。结论融雪剂可明显盐化地面雪，并对混凝土方砖衣斌蚀诈硪。

Investigation of Chlorine Deicers' Pollution and Corrosive Effect

To observe eontent change of certain dements in the snow after using deicers on main streets in Changchun and deicers＇ corrosive effects upon the streets＇ concrete brick Method： After snow with deicers, collect the snow samples from five main streets in Changehun, measure their pH and contents of Cl^- ,Na^＋ ,Ca^2＋,Mg^2＋,K^＋. Divide concrete bricks immerse each group in deicer solution of different eoneentrations and observe the corrosive effeets in 20 days. Results The average of ionic of snow water that contains deieer were remarkably higher than that of comparison sample（P 〈0.01 ）, pH were lower obviously;Corrosive effeet of deicer solution of 10% on the concrete bricks emerges 20 days later, and it is more apparent with regard to deicer solution of 20%. Conclusion Deicers can obviously salinize snow on the road surface, and they have corrosive effect on concrete brick.