CN110205632B - 一种提高螺纹钢混凝土握裹性能的水性防锈剂 - Google Patents
一种提高螺纹钢混凝土握裹性能的水性防锈剂 Download PDFInfo
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Abstract
本发明公开了一种提高螺纹钢混凝土握裹性能的水性防锈剂，由如下原料组成：0.1wt％‑5wt％的1‑苯基‑5‑巯基四氮唑、2wt％‑5wt％的乙酸、0.01wt％‑0.1wt％的平平加、1wt％‑3wt％的N,N‑二甲基甲酰胺、0.1wt％‑0.3wt％的特丁基对苯二酚、0.1wt％‑0.3wt％的4‑磺基邻苯二酸，以及余量的水。本发明提高螺纹钢混凝土握裹性能的水性防锈剂与现有技术相比，防锈效果显著，露天耐大气和雨水腐蚀的性能优异，同时防锈处理后能一定程度提高螺纹钢与混凝土的握裹强度。
Description
技术领域
本发明属于金属表面防腐技术领域，具体涉及一种提高螺纹钢混凝土握裹性能的水性防锈剂。
背景技术
螺纹钢是表面带肋的钢筋，亦称带肋钢筋，通常带有2道纵肋和沿长度方向均匀分布的横肋。带肋钢筋在混凝土中主要承受拉应力。带肋钢筋由于肋的作用，和混凝土有较大的粘结能力，因而能更好地承受外力的作用。带肋钢筋广泛用于各种建筑结构、特别是大型、重型、轻型薄壁和高层建筑结构。
近年来, 为了生产低成本高强度钢筋，各钢铁企业大都采用了终轧后穿水冷却工艺。该工艺能在一定程度上改善组织，提高钢筋的机械性能，但该工艺存在着一个很大的缺点，即穿水冷却的螺纹钢在储存和运输过程中很容易生锈，这不仅严重影响了螺纹钢的表面质量，而且锈迹会造成螺纹钢表面与混凝土握裹强度降低，严重影响建筑质量，钢筋的锈蚀成为了影响建筑物持久性的主要因素。因此，越来越多的螺纹钢厂家采用化学处理剂对螺纹钢表面进行防锈防腐处理。螺纹钢表面处理剂的市场需求量巨大，其中各类防锈剂占据着主要地位。防锈剂主要包括水基防锈剂和防锈油。普通水基防锈剂由于含有亚硝酸钠等致癌物质，将会损害工人的身体健康，同时严重污染环境；防锈油会降低螺纹钢与混凝土的握裹力，严重影响螺纹钢的性能和质量。
目前，现有技术已经公开了一些金属表面防锈的技术方案，例如公布号为CN106555180A的中国专利申请，公开了一种金属镀层保护剂，该金属镀层保护剂含有5重量％-20重量％的醇醚化合物，0.1重量％-5重量％的含巯基杂环化合物，5重量％-20重量％的羧酸化合物，0.001重量％-1重量％的乳化剂，5重量％-20重量％的酰胺化合物，以及余量的水。该发明的金属镀层保护剂能够显著提高金属镀层的耐腐蚀性和耐久性，防止金属镀层氧化变色，不影响金属镀层的焊接性能，且不会对环境造成污染。但是，该保护剂对金属处理时的浸泡的条件为30-80℃下浸泡3-10min，而螺纹钢穿水工艺的时间仅有几秒钟，在不对原工艺设备进行改造的前提下，如此短的处理时间内很难形成耐性性能优异的保护膜，最终严重影响到螺纹钢的耐蚀性能。
因此，研发一种处理时间短并且提高处理后螺纹钢耐蚀性能及混凝土握裹性能的水性防锈剂是具有重要意义的。
发明内容
为克服现有技术的不足，本发明的目的在于提供一种处理时间短并且提高处理后螺纹钢耐蚀性能及混凝土握裹性能的水性防锈剂。为实现上述发明目的，本发明采用以下技术方案：
一种提高螺纹钢混凝土握裹性能的水性防锈剂， 由如下原料组成：0.1wt％-5wt％的1-苯基-5-巯基四氮唑、2wt％-5wt％的乙酸、0.01wt％-0.1wt％的平平加、1wt％-3wt％的N,N-二甲基甲酰胺、0.1wt％-0.3wt％的特丁基对苯二酚、0.1wt％-0.3wt％的4-磺基邻苯二酸，以及余量的水。
优选地，一种提高螺纹钢混凝土握裹性能的水性防锈剂，由如下原料组成：2wt％的1-苯基-5-巯基四氮唑、3wt％的乙酸、0.05wt％的平平加、2wt％的N,N-二甲基甲酰胺、0.1wt％的特丁基对苯二酚、0.3wt％的4-磺基邻苯二酸，以及余量的水。
本发明的一种提高螺纹钢混凝土握裹性能的水性防锈剂的的制备方法简单，将各原料加入水中搅拌均匀即可。
本发明的一种提高螺纹钢混凝土握裹性能的水性防锈剂的处理方法，具体为：直接在原螺纹钢穿水工艺的水中加入本发明水性防锈剂，使得质量浓度为3~5%即可，穿水处理的水溶液温度为20-100℃，螺纹钢从水溶液中快速穿过，与水溶液的接触时间为3-10秒。
本发明提高螺纹钢混凝土握裹性能的水性防锈剂与现有技术相比，防锈效果显著，露天耐大气和雨水腐蚀的性能优异，同时防锈处理后能一定程度提高螺纹钢与混凝土的握裹强度。
具体实施方式
下面通过实施例对本发明作进一步描述。
实施例1：
一种提高螺纹钢混凝土握裹性能的水性防锈剂，由如下原料组成：2wt％的1-苯基-5-巯基四氮唑、3wt％的乙酸、0.05wt％的平平加、2wt％的N,N-二甲基甲酰胺、0.1wt％的特丁基对苯二酚、0.3wt％的4-磺基邻苯二酸，以及余量的水。
对比例1：
一种提高螺纹钢混凝土握裹性能的水性防锈剂，由如下原料组成：2wt％的1-苯基-5-巯基四氮唑、3wt％的乙酸、0.05wt％的平平加、2wt％的N,N-二甲基甲酰胺，以及余量的水。
对比例1与实施例1的不同之处在于，不含有特丁基对苯二酚、4-磺基邻苯二酸。
对比例2：
一种提高螺纹钢混凝土握裹性能的水性防锈剂，由如下原料组成：2wt％的1-苯基-5-巯基四氮唑、3wt％的乙酸、0.05wt％的平平加、2wt％的N,N-二甲基甲酰胺、0.1wt％的特丁基对苯二酚，以及余量的水。
对比例2与实施例1的不同之处在于，不含有4-磺基邻苯二酸。
对比例3：
一种提高螺纹钢混凝土握裹性能的水性防锈剂，由如下原料组成：2wt％的1-苯基-5-巯基四氮唑、3wt％的乙酸、0.05wt％的平平加、2wt％的N,N-二甲基甲酰胺、0.3wt％的4-磺基邻苯二酸，以及余量的水。
对比例3与实施例1的不同之处在于，不含有特丁基对苯二酚。
对比例4：
一种提高螺纹钢混凝土握裹性能的水性防锈剂，由如下原料组成：2wt％的1-苯基-5-巯基四氮唑、3wt％的乙酸、0.05wt％的平平加、2wt％的N,N-二甲基甲酰胺、0.1wt％的特丁基对苯二酚、0.3wt％的2-磺基苯丙酸，以及余量的水。
对比例4与实施例1的不同之处在于，用2-磺基苯丙酸替代4-磺基邻苯二酸。
对比例5：
一种提高螺纹钢混凝土握裹性能的水性防锈剂，由如下原料组成：2wt％的1-苯基-5-巯基四氮唑、3wt％的乙酸、0.05wt％的平平加、2wt％的N,N-二甲基甲酰胺、0.1wt％的特丁基对苯二酚、0.08wt％的氟化镍、0.5wt％的苯基乙二醇醚，以及余量的水。
对比例5与实施例1的不同之处在于，用0.08wt％的氟化镍、0.5wt％的苯基乙二醇醚替代0.3wt％的4-磺基邻苯二酸。
对比例6：
一种提高螺纹钢混凝土握裹性能的水性防锈剂，由如下原料组成：2wt％的1-苯基-5-巯基四氮唑、3wt％的乙酸、0.05wt％的平平加、2wt％的N,N-二甲基甲酰胺、0.05wt％的甘油单硬酯酸酯、0.05wt％的2-磺基苯丙酸、0.3wt％的2-磺基苯丙酸，以及余量的水。
对比例6与实施例1的不同之处在于，用0.05wt％的甘油单硬酯酸酯、0.05wt％的2-磺基苯丙酸替代0.1wt％的特丁基对苯二酚。
用实施例1、对比例1-6的水性防锈剂分别配制质量浓度3%的水溶液，对安徽某螺纹钢企业生产的同一规格、同一批次的螺纹钢产品进行常温穿水防锈处理，调整螺纹钢移动速度使穿水接触时间为5秒，然后自然干燥。取上述7组经过不同防锈剂水溶液穿水处理的螺纹钢试样，以及1组未加防锈剂的原穿水工艺处理的空白组螺纹钢试样，每组6根，进行如下对比试验：
对比试验1：露天耐候试验
每组3根螺纹钢试样同时在楼顶露天平放2个月。在这两个月中降雨7场，雨水天气共计23天。在试验过程中，每天观察钢铁表面生锈情况，并在2个月试验完成时记录最终生锈情况，结果见表1。
对比试验2：螺纹钢混凝土握裹性能试验
每组3根螺纹钢试样，将螺纹钢样品预埋在150mm×150mm×150mm的混凝土试块中，按行业标准混凝土试件的成型和养护方法养护后龄期后，依据DL/T 5150-2001《水工混凝土试验规程》进行钢筋与混凝土握裹强度检验，结果见表1。
表1 对比试验结果
| 试验组 | 平均锈蚀面积 | 握裹强度平均值 |
| 空白组 | 锈蚀面积大于99% | 9.7 MPa |
| 实施例1 | 锈蚀面积小于1% | 11.1 MPa |
| 对比例1 | 锈蚀面积50%-55% | 7.8 MPa |
| 对比例2 | 锈蚀面积30%-35% | 8.4 MPa |
| 对比例3 | 锈蚀面积20%-25% | 8.9 MPa |
| 对比例4 | 锈蚀面积10%-15% | 9.3 MPa |
| 对比例5 | 锈蚀面积25%-30% | 8.2 MPa |
| 对比例6 | 锈蚀面积20%-25% | 9.6 MPa |
从表1的对比试验结果可以看出，经过本发明实施例1水性防锈剂穿水处理大大提高了螺纹钢耐大气和雨水腐蚀的性能，同时使得螺纹钢与混凝土的握裹强度有了一定的提高。对比例1-6的防锈剂中组分发生变化，导致防锈剂的阻锈效果大大降低，同时也对螺纹钢与混凝土的握裹力造成不同程度的影响。
以上仅为本发明的较佳实施例而已，并非用来限定本发明的实施范围。即凡依本发明申请专利范围的内容所作的等效变化与修饰，都应为本发明的技术范畴。
Claims (3)
1.一种提高螺纹钢混凝土握裹性能的水性防锈剂，其特征在于，由如下重量百分比的原料组成：0.1wt％-5wt％的1-苯基-5-巯基四氮唑、2wt％-5wt％的乙酸、0.01wt％-0.1wt％的平平加、1wt％-3wt％的N,N-二甲基甲酰胺、0.1wt％-0.3wt％的特丁基对苯二酚、0.1wt％-0.3wt％的4-磺基邻苯二酸，以及余量的水。
2.根据权利要求1所述的一种提高螺纹钢混凝土握裹性能的水性防锈剂，其特征在于，由如下重量百分比的原料组成：2wt％的1-苯基-5-巯基四氮唑、3wt％的乙酸、0.05wt％的平平加、2wt％的N,N-二甲基甲酰胺、0.1wt％的特丁基对苯二酚、0.3wt％的4-磺基邻苯二酸，以及余量的水。
3.根据权利要求1或2所述的一种提高螺纹钢混凝土握裹性能的水性防锈剂的处理方法，其特征在于，直接在原螺纹钢穿水工艺的水中加入所述水性防锈剂，使得质量浓度为3~5%即可，穿水处理的水溶液温度为20-100℃，螺纹钢从水溶液中快速穿过，与水溶液的接触时间为3-10秒。
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