ZUO Yajing.Study on Surface Treatment and Corrosion Resistance of Rebar Used for Supports in Civil Engineering[J].Plating & Finishing,2022,(9):71-77.[doi:10.3969/j.issn.1001-3849.2022.09.013]
土建工程支架用螺纹钢表面处理及耐腐蚀性能研究
- Title:
- Study on Surface Treatment and Corrosion Resistance of Rebar Used for Supports in Civil Engineering
- Keywords:
- rebar ; composite phosphating process ; phosphating film ; oil-immersion sealing ; silicate sealing
- 分类号:
- TG174
- 文献标志码:
- A
- 摘要:
- 为有效提高土建工程支架常用的 HRB335 螺纹钢的耐腐蚀性能,采用复合磷化工艺进行表面处理,然后采用不同封闭方法后处理。实验结果表明:复合磷化螺纹钢的耐腐蚀性能优于常规磷化螺纹钢。复合磷化膜中含有呈良好分散状态的 PTFE 颗粒起到物理填充作用,可以阻挡腐蚀介质渗透,抑制腐蚀发展。通过浸油封闭和硅酸盐封闭使复合磷化膜的耐腐蚀性能进一步提高,硅酸盐封闭过程中由于溶解作用、析出硅酸钠固体相以及反应生成新硅酸盐化合物,使复合磷化膜的致密性明显改善,具有更好的耐腐蚀性能。复合磷化然后硅酸盐封闭处理的螺纹钢表现出优异的耐腐蚀性能,有望较好的满足使用要求。
- Abstract:
- : HRB335 rebar has been widely used in the manufacturing of supports in civil engineering. In this study , HRB335 rebar was exposed to surface treatment by composite phosphating process , followed by post-treatment via different sealing methods , to improve its corrosion resistance. The results show that the composite phosphated rebar is superior to conventional phosphated rebar in terms of corrosion resistance. The composite phosphating film contains well-dispersed PTFE particles filling inter-crystal gap , which hinder the penetration of corrosive media and inhibit the corrosion. The corrosion resistance of composite phosphating film was further improved by oil-immersion sealing and silicate sealing. Due to the dissolution , sodium silicate in the solid-phase precipitates and new silicate compounds were generated by chemical reactions during silicate sealing. As a result , surface defects in the composite phosphating film were repaired , significantly enhancing its compactness and corrosion resistance. The rebar treated by composite phosphating and silicate sealing exhibited excellent corrosion resistance , and it is expected to meet the increasing application requirements.
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备注/Memo
收稿日期: 2022-02-21 修回日期: 2022-03-10 作者简介: 左亚静( 1981 ―),女,硕士,讲师,主要研究方向:建筑工程材料腐蚀与防护、建筑结构、工程项目管理等, email : teacher_zuo111@126.com 基金项目: 山西省应用基础研究计划项目( 201901D21145 )