CN104404502B - 一种磷酸盐基钢筋防腐涂层 - Google Patents

一种磷酸盐基钢筋防腐涂层 Download PDF

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CN104404502B
CN104404502B CN201410637350.9A CN201410637350A CN104404502B CN 104404502 B CN104404502 B CN 104404502B CN 201410637350 A CN201410637350 A CN 201410637350A CN 104404502 B CN104404502 B CN 104404502B
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陈友治
孙涛
王长雨
李新平
闫革
韩卫卫
孙冕
崔静恩
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Abstract

本发明公开了一种用于海洋钢筋混凝土中钢筋的腐蚀的涂层材料。采用如下方式制备而来：将氢氧化铝加入磷酸中，在70‑90℃加热保温3‑5h，得到磷酸盐粘结剂；以磷酸盐粘结剂为基液，加入醛基树脂改性剂、氧化铬、氧化铁、微硅粉、铝粉和氧化镁研磨搅拌均匀，得到磷酸盐涂料；其中，各组分按重量份数计为：磷酸盐粘结剂5‑12；氧化铁3‑7；微硅粉3‑7；铝粉8‑12；氧化镁1‑3；醛基树脂1‑5。本发明的防腐蚀磷酸盐基涂层材料可以实现常温固化，固化时间可以根据需求进行调节，使磷酸盐涂料的应用得到了推广；固化后的强度高，结构致密，可以与混凝土结构形成稳定结合，能够很好的保护钢筋。

Description

一种磷酸盐基钢筋防腐涂层
技术领域
本发明属于建筑材料技术领域，具体涉及一种用于海洋钢筋混凝土中钢筋的腐蚀的涂层材料。
背景技术
在海洋环境条件下的建筑中，钢筋混凝土材料是最为常用的建筑材料，对钢筋来说，混凝土是一种良好的天然保护材料。然而，在海洋环境中，这种混凝土保护层的可靠性还是不够的，海洋建筑工程由于受到海水中的腐蚀离子以及海洋环境条件下的干湿交替等的直接作用，其受到破坏的状况会更严重，对于海上混凝土结构的钢筋，用防腐蚀涂料进行保护有更好的经济效益和应用价值。
在水泥中添加聚丙烯酸乳胶、丁苯乳胶、环氧树脂乳胶，水溶性环氧树脂，聚乙烯醇缩醛类等亲水性有机树脂材料，硬化后可以明显减小水泥的渗透性，用此法制成的涂料涂布在水泥混凝土表面，可以极大地提高混凝土的耐海水性。此外，以水玻璃为基料，氧化锌、磷酸盐、亚硫酸盐或氟硅酸盐为硬化剂的无机涂料也有同样的抵抗海水渗透的作用。然而这些涂覆于混凝土表面的涂层，直接受到海洋环境的作用，很容易遭到破坏，失去对混凝土中钢筋的保护作用。
发明内容
本发明的目的在于提供一种用于海洋钢筋混凝土结构的钢筋表面的涂层材料，作为钢筋的防腐蚀保护涂层，具有工艺简单、抗氧化性、成本低等特点。
一种磷酸盐基钢筋防腐涂层，采用如下方式制备而来：
1)将氢氧化铝加入磷酸中，在70-90℃加热保温3-5h，得到磷酸盐粘结剂；
2)以磷酸盐粘结剂为基液，加入醛基树脂改性剂、氧化铁、微硅粉、铝粉和氧化镁研磨搅拌均匀，得到磷酸盐涂料；
其中，步骤2)中各组分按重量份数计为：
按上述方案，优化地，所述醛基树脂改性剂占磷酸盐基钢筋防腐涂层的质量百分数为5～15％。
氧化铁为颜填料，兼具防蚀作用。
微硅粉为磷酸盐涂料的填料，改善涂料的粘度和致密性。
氧化镁为固化剂，可实现磷酸盐涂料的常温固化。
醛基树脂改性剂作为粘结剂，替代部分的磷酸盐粘结剂，得到复合磷酸盐涂料。
本发明的有益效果是：
1、本发明的防腐蚀磷酸盐基涂层材料涂覆性能好，与钢筋表面的结合性能好，可很好的保护钢筋；
2、本发明的防腐蚀磷酸盐基涂层材料可以实现常温固化，固化时间可以根据需求进行调节，使磷酸盐涂料的应用得到了推广；
3、本发明的防腐蚀磷酸盐基涂层材料固化后的强度高，结构致密，可以与混凝土结构形成稳定结合，能够很好的保护钢筋。
附图说明
图1：醛基树脂加入量对涂层耐盐雾性的影响；
图2：涂层氯离子渗透浓度与时间关系。
具体实施方式
以下实施例进一步阐释本发明的技术方案，但不作为对本发明保护范围的限制。
实施例1-7：
一种磷酸盐基钢筋防腐涂层由磷酸盐粘结剂、氧化铁、微硅粉、铝粉、氧化镁、醛基树脂改性剂原材料制备而成，各原料的按重量份数计见表1。
表1原料配比
采用如下方式制备而来：
1)将氢氧化铝加入磷酸中，在70-90℃加热保温3-5h，得到磷酸盐粘结剂；
2)以磷酸盐粘结剂为基液，加入醛基树脂改性剂、氧化铁、微硅粉、铝粉和氧化镁研磨搅拌均匀，得到磷酸盐涂料；
氧化铁为颜填料，兼具防蚀作用。
微硅粉为磷酸盐涂料的填料，改善涂料的粘度和致密性。
氧化镁为固化剂，可实现磷酸盐涂料的常温固化。
醛基树脂改性剂作为粘结剂，替代部分的磷酸盐粘结剂，得到复合磷酸盐涂料。
根据表1原料的重量比，得到磷酸盐基钢筋防腐涂料，其性能见表2。
表2性能参数
表2说明了：1-7号实施例的涂层外观为暗红色，表面光滑。采用涂—4杯法，测定涂层黏度除实施例1都在技术指标15～18之间。涂层厚度可以达到120μm,附着力为0～3级。另外涂层硬度在H～6H之间。对涂层进行耐盐雾试验实施例7可达到600h。
实施例A-F：
防腐蚀磷酸盐基涂层材料，各原料所占重量份数如下表所示。制备过程同上。
表3各原料所占重量份数
得到的磷酸盐涂层材料耐盐雾性能参照附图1所示。从图1中醛基树脂改性剂加入量对涂层耐盐雾性的影响可以看出磷酸盐涂料开始随着配比的减小，其耐盐雾时间延长；当配比为7:3时耐盐雾时间1825h；然后随着配比的减小，其耐盐雾时间又开始减少。
醛基树脂改性剂加入量对磷酸盐涂层材料耐海水侵蚀性能影响参照表4所示：
表4不同配比磷酸盐涂膜在人工海水中耐蚀性试验
表4中可以看出各涂膜在开始阶段质量损失不是很大，随着实验周期的延长，各磷酸盐涂膜质量损失变化率都有略微增大，且增长幅度相差不大，整个试验过程中各涂膜几乎没有质量损失，因此，各磷酸盐涂膜耐人工海水侵蚀性能比较好。
醛基树脂改性剂加入量对氯离子渗透率的影响参照附图2所示。从图2不同基/改比磷酸盐涂层氯离子渗透浓度与时间关系可以看出，厚度150μm的各磷酸盐涂层在60h时达到前期动态平衡，到达250h以后各磷酸盐涂层氯离子渗透浓度发生变化。其中实施例D产物为最佳。

Claims (2)

1.一种磷酸盐基钢筋防腐涂层，其特征在于采用如下方式制备而来：
1)将氢氧化铝加入磷酸中，在70-90℃加热保温3-5h，得到磷酸盐粘结剂；
2)以磷酸盐粘结剂为基液，加入醛基树脂、氧化铁、微硅粉、铝粉和氧化镁研磨搅拌均匀，得到磷酸盐涂料；
其中，步骤2)中各组分按重量份数计为：
2.如权利要求1所述磷酸盐基钢筋防腐涂层，其特征在于所述醛基树脂占磷酸盐基钢筋防腐涂层的质量百分数为5～15％。
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CN106116438B (zh) * 2016-07-05 2018-05-04 江苏苏博特新材料股份有限公司 一种磷酸镁基钢筋防护涂层材料及其制备方法
CN107673666A (zh) * 2017-09-28 2018-02-09 华南理工大学 一种碱激发矿渣/粉煤灰钢筋表面防腐涂层及其制备方法
CN108751925B (zh) * 2018-07-19 2021-03-26 贵州磷镁材料有限公司 一种基于磷镁材料的道路标线材料及施工方法

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