Page 215 - 《精细化工》2022年第4期
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第 4 期 杨振声,等: 乙氧基化咪唑啉阻锈剂的制备及性能 ·851·
低了咪唑啉结构对净浆流动性的影响。根据图 11 测 大,阻锈剂的添加使得电荷转移电阻逐渐增大。扫
定的数据发现,乙氧基化咪唑啉阻锈剂质量分数的 描电镜观察腐蚀形貌表明该阻锈剂在混凝土中能很
增加,会使水泥净浆的流动度略微降低,当添加质 好地吸附到碳钢表面成膜,使碳钢表面更加平滑,
量分数 5%乙氧基化咪唑啉阻锈剂时,30 s 和 60 min 保护碳钢免受腐蚀介质的侵蚀。
测定水泥净浆的流动度为 250.3 和 240.0 mm,与零 (3)水泥净浆流动度测试,通过对比两种咪唑
添加相比减少了 4.7 和 6.0 mm。这可能是阻锈剂质量 啉阻锈剂可知,乙氧基化咪唑啉对水泥净浆流动度
分数的增大增强了咪唑啉结构与水分子之间相互作 的影响远小于普通咪唑啉对其的影响。表明乙氧基
用,对水分子的排斥作用增强,导致水泥的分散性、 长链的加成,大大增强了咪唑啉结构的亲水性能,
自由性相应减少,降低了水泥净浆的流动度。水泥净 该阻锈剂在本实验研究的质量分数范围内对水泥净
浆流动度在 220~260 mm 是水泥实际应用的最佳范 浆的流动度无不利影响。
围 [32] ,因此,乙氧基化咪唑啉阻锈剂在适用范围内,
参考文献:
不会损害水泥净浆的流动度。
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