CN105001775B - 一种不粘性矿脂防蚀膏 - Google Patents
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Abstract
本发明为一种不粘性矿脂防蚀膏，具体说是用于电网输电线路杆塔螺栓紧固件以及钢架结构与螺栓紧固件之间存在的缝隙等防腐的不粘性矿脂防蚀膏。按重量百分比计，聚醚多元醇EP‑330N树脂36％‑42％、凡士林24％‑29％、有机膨润土3％‑5％、复合填充剂5％‑8％、二壬基萘磺酸钡6％‑8％、短切纤维0.1％‑1％、羊毛脂6％‑8％、硬脂酸8％‑12％和HDI三聚体(N3390)5％‑7％。本发明不粘性矿脂防蚀膏涂覆在被保护物表面后，形成一种具有弹性的有机覆层，涂膜层致密具有物理隔离保护作用；同时对被保护物金属起到良好的腐蚀防护效果。这种不粘性矿脂防蚀膏将在对螺栓紧固件实施有效保护的同时，使施工及后期维护操作更为简便。
Description
技术领域
本发明涉及矿脂防蚀膏，具体说是用于电网输电线路杆塔螺栓紧固件以及钢架结构与螺栓紧固件之间存在的缝隙部位等防腐蚀的不粘性矿脂防蚀膏。
背景技术
目前国内电网输电线路杆塔大多采用热镀锌加防腐涂层的保护措施，热镀锌层的阴极保护效果在环境条件较好的地区，防腐效果是比较好的。但在重工业污染区输电线路杆塔处于含有二氧化硫等酸雨腐蚀严重的区域，大多运行一定年限后腐蚀远大于普通区域，大量螺栓紧固件采用热浸镀锌等防腐方法，由于钢架结构与螺栓紧固件之间存在缝隙，导致酸性水溶液的渗透及保留，在酸性环境下，镀锌层腐蚀速率远大于常规环境，造成严重的化学和电化学的腐蚀。随着热浸锌镀层逐步腐蚀，其对螺栓紧固件碳钢结构的保护作用逐渐减低直至消失，失去阴极保护的碳钢结构开始腐蚀。而且螺栓紧固件结构复杂，除锈、涂漆维修困难，通常使用的涂层防腐施工方法很难达到理想的防护效果。
发明内容
本发明为了改善在酸雨腐蚀严重的区域的防腐问题，提供了一种不粘性矿脂防蚀膏，形成一种具有弹性的有机覆层，涂膜层致密具有物理隔离保护作用，从而起到对被保护物起到良好的腐蚀防护效果。
所述一种不粘性矿脂防蚀膏，其特征在于该矿脂防蚀膏中按质量百分比含有：聚醚多元醇EP-330N树脂36％-42％；凡士林24％-29％；有机膨润土3％-5％；复合填充剂5％-8％；二壬基萘磺酸钡6％-8％；短切纤维0.1％-1％；羊毛脂6％-8％；硬脂酸8％-12％；HDI三聚体N33905％-7％。
所述的聚醚多元醇EP-330N树脂为分子主链含有醚键的聚合物并且其端基或侧基含有三个羟基的聚醚三醇。
所述的复合填充剂为云铁灰和磷酸锌的混合物，按质量分数计，云铁灰∶磷酸锌＝1∶1。
本发明不粘性矿脂防蚀膏可以广泛的应用于国内电网输电线路杆塔以及电厂钢铁构筑物的各种复杂形状的螺栓、螺帽等螺栓紧固件。
本发明的有益效果是：本发明不粘性矿脂防蚀膏具有良好的防锈蚀防腐效果，使用本不粘性矿脂防蚀膏，对被保护物涂抹方便，附着力良好，形成一种具有弹性的有机覆层，涂膜层致密具有物理隔离保护作用，对被保护物起到良好的腐蚀防护效果。能经受日晒雨淋、不脱层、耐候、可脱除，使施工及后期维护操作更为简便。
具体实施方式
为了更好的理解本发明的技术方案，下面结合实施例详细描述本发明提供的技术方案。
本发明所述的一种不粘性矿脂防蚀膏，其特征在于该矿脂防蚀膏中按质量百分比含有：聚醚多元醇EP-330N树脂36％-42％；凡士林24％-29％；有机膨润土3％-5％；复合填充剂5％-8％；二壬基萘磺酸钡6％-8％；短切纤维0.1％-1％；羊毛脂6％-8％；硬脂酸8％-12％；HDI三聚体N33905％-7％。
所述的聚醚多元醇EP-330N树脂为分子主链含有醚键的聚合物并且其端基或侧基含有三个羟基的聚醚三醇。
所述的复合填充剂为云铁灰和磷酸锌的混合物，按质量分数计，云铁灰∶磷酸锌＝1∶1。
其中聚醚多元醇EP-330N树脂为聚醚三醇树脂，分子结构中包含多官能度醚键和三个羟基结构，是一种三聚体弹性有机材料，具有增强附着力，形成自固化弹性有机覆层，耐老化性能好。
所述的复合填充剂为云铁灰和磷酸锌，其按质量分数计，云铁灰∶磷酸锌＝1∶1。可以增加矿脂防蚀膏的致密性，降低水介质的渗透性，对腐蚀性介质起屏蔽作用。
所述的短切纤维为2mm短切玻璃纤维，可以增强附着力，同时防止有机覆层的龟裂，提高了矿脂防蚀膏的耐候性能。
本发明配置方法如下：
组分1的配置：(1)按照配方称取各组分；(2)将凡士林、硬脂酸铝加入烧杯中，至于加热设备上加热至130℃，待其完全融化后，加入二壬基萘磺酸钡、羊毛脂，待完全融化后，在室温下搅拌、缓慢降温至室温后，加入有机膨润土、聚醚多元醇EP-330N树脂、复合填充剂和短切纤维，直至搅拌均匀。组分2为固化剂HDI三聚体(N3390)。
不粘性矿脂防蚀膏使用方法：
针对重工业污染区输电线路杆塔螺栓紧固件在不同使用期限后表现出的表面状态,按照如下方法进行基面处理。
使用刮刀、钢丝刷、砂纸对锈蚀钢材基面存在的锈迹及不光洁的部分进行打磨，使基面光洁度达到要求。使用丙酮、纱布等对除锈打磨之后的基面进行擦拭、清洗，自然风干。若镀锌钢材的基面光洁完好，则直接使用丙酮、纱布等对基面进行擦拭、清洗，自然风干。
使用前将组分1充分搅拌均匀(无沉底，颜色一致)。使用准确的称量工具按比例准确称取组分1和组分2混合。对两个组分进行充分搅拌，直至搅拌均匀，混合后的组分须在2小时内使用完毕。
用刮刀刮取20～30g不粘性矿脂防蚀膏，纵横涂抹，重复5～10次，使不粘性矿脂防蚀膏在底材表面均匀分布。用量约400～500g/㎡。
实施例1
不粘性矿脂防蚀膏按重量百分比计，聚醚多元醇EP-330N树脂38％、凡士林25％、有机膨润土3％、复合填充剂6％、二壬基萘磺酸钡6％、短切纤维1％、羊毛脂7％、硬脂酸9％和HDI三聚体(N3390)5％。
测定实施例所得物质的一般特性，参见表一。
表一不粘性矿脂防蚀膏性能测试结果
耐温流动性实验方法：
此实验用来测试矿脂防蚀膏在测试温度条件下，是否会发生流淌的现象，从而确定该型号的矿脂防蚀膏的最高适用温度。将涂有试样的试验片放在50℃恒温空气浴中，垂直放置24小时，观察试样膜是否流淌到基准线上。
试验片的预处理：采用GB/T1591《低合金高强度结构钢》规定的Q345B钢，用砂纸沿着试验片长边的方向进行打磨，直至试验片表面光亮无锈迹。将打磨好的试验片浸入丁酮中浸泡15min，取出试验片用干净的纱布擦干，直至试验片上无铁屑或其他污染物，之后用冷风干燥。
将试验片竖直放置，在每片试验片的一面距下端25mm处描一黑线。在25mm黑线以上的试验片表面涂上150μm的厚的矿脂防蚀膏。在距涂好的矿脂防蚀膏膜下端3mm处另描一条黑线作为基准线。
将3片制备好的试验片垂直放置在50℃恒温气体浴中，测试时应保证恒温空气浴内无强烈空气对流。在实验过程中，若观察到试样膜流淌到基准线上，记录其所经历的耐温流动性实验时间，即：耐温时间；若实验时间达到24h，3块试片的试样膜仍未流淌到基准线上，记录其耐温时间为24h，认为“膜不流淌”。
按照表一的标准进行测试。目测为灰色，粘稠状态；滴点大于80℃；50±2℃，垂直放置24h后膜不流淌，耐温流动性好；水·膏置换性实验不生锈；盐水浸渍试验、中性盐雾试验(1000h)、紫外老化试验(300h)实验结果良好，试样无变化，不生锈，抗老化性能好。
实施例2
不粘性矿脂防蚀膏按重量百分比计，聚醚多元醇EP-330N树脂39％、凡士林26％、有机膨润土3％、复合填充剂5％、二壬基萘磺酸钡6％、短切纤维1％、羊毛脂6％、硬脂酸9％和N3390HDI三聚体5％。
效果与特性与实施例1相同。按照表一的标准进行测试。目测为灰色，粘稠状态；滴点大于80℃；50±2℃，垂直放置24h后膜不流淌，耐温流动性好；水·膏置换性实验不生锈；盐水浸渍试验、中性盐雾试验(1000h)、紫外老化试验(300h)实验结果良好，试样无变化，不生锈，抗老化性能好。
使用上述组成的不粘性矿脂防蚀膏，形成的自固化的弹性体有机覆层，涂膜致密，耐水性能和耐老化性能好。在螺栓紧固件上使用不粘性矿脂防蚀膏能起到良好的防护作用。
Claims (1)
1.一种不粘性矿脂防蚀膏，其特征在于该矿脂防蚀膏中按质量百分比含有：
所述复合填充剂为云铁灰和磷酸锌按照质量比为1:1混合的混合物。
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