久美特涂层对镁水泥混凝土中钢筋保护试验研究

发布时间：2019-08-12 21:07

【摘要】：针对镁水泥混凝土自身氯离子对钢筋的腐蚀而降低了镁水泥钢筋混凝土工作寿命的问题,提出利用久美特涂层来缓解氯盐对钢筋的腐蚀作用。试验通过利用电化学工作站对久美特涂层钢筋的镁水泥钢筋混凝土试件在自然环境下和水环境以及氯化镁溶液中的极化曲线进行分析。结果表明:通过对腐蚀电流密度和腐蚀电位的分析得出久美特涂层可以很好的保护镁水泥钢筋混凝土中的钢筋免受腐蚀,并且混凝土保护层厚度越大钢筋的腐蚀电流密度就越小。在最后腐蚀达到稳定后,久美特涂层钢筋腐蚀电流密度的数量级是钢筋无锈蚀时的100分之一,从而得出久美特涂层对镁水泥钢筋混凝土中的钢筋起到很好的保护作用,使得镁水泥混凝土在盐渍土中依然可以拥有很好的工作性能。
[Abstract]:In view of the problem that the corrosion of magnesium cement concrete by chloride ion reduces the working life of magnesium cement reinforced concrete, a long meth coating is proposed to alleviate the corrosion effect of chloride on steel bar. The polarization curves of magnesium cement reinforced concrete specimens coated with Gumet steel bars in natural environment, water environment and magnesium chloride solution were analyzed by means of electrochemical workstation. The results show that the corrosion current density and corrosion potential of the steel bar in magnesium cement reinforced concrete can be well protected by the analysis of corrosion current density and corrosion potential, and the larger the thickness of the concrete protective layer is, the smaller the corrosion current density of the steel bar is. After the final corrosion is stable, the order of magnitude of corrosion current density of Jumet coated steel bar is one hundred of that of steel bar without corrosion. It is concluded that Gumet coating has a good protective effect on the steel bar in magnesium cement reinforced concrete, so that magnesium cement concrete can still have good working performance in saline soil.
【作者单位】：兰州理工大学甘肃省土木工程防灾减灾重点实验室;中国科学院青海盐湖研究所;洛阳路桥建设集团有限责任公司;国网洛宁县供电公司;
【基金】：国家自然科学基金项目(51168031,51468039) 甘肃省自然科学基金(1310RJZA051) 中国科学院盐湖资源与化学重点实验室开放基金资助(KLSLRC-KF-13-HX-8)
【分类号】：TU528

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