CN113294596A - 一种防腐油管及其制备方法 - Google Patents
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Abstract
本发明公开了一种防腐油管及其制备方法，包括油管本体，所述油管本体的内表面设有纳米TiO2改性氟碳防腐层，外表面设有防腐涂层，所述油管本体的两端设置有接箍；本发明提供的防腐油管耐温性好，其最高工作温度可达130℃；耐磨性佳，是普通N80油管的4倍以上；涂层附着力强，与油管本体的剥离强度达13.5MPa；油管本体上的涂层碳化后，还可重新喷涂，进而达到重复使用的目的。
Description
技术领域
本发明涉及油管技术领域，具体涉及一种防腐油管及其制备方法。
背景技术
近年来，随着多项技术应用，特别是化学驱油方式的开采，油田管线受电化学、细菌、含矿化度较高的井液、聚合物驱、三元驱采出液、热洗剥蚀腐蚀严重。
腐蚀使管线表面产生厚厚的氧化物，粗糙的表面又易结垢、结蜡，从而造成管线回油压力升高，再经过洗井冲刷、剥蚀，使得管壁变薄，严重时，可能会导致管线穿孔，造成管漏，进而导致产量下降。
发明内容
针对现有技术中的缺陷，本发明提供一种防腐油管及其制备方法，以提高油管的耐温、耐磨性能以及附着力，并可重复使用。
本发明的技术方案具体如下：
一方面，本发明提供一种防腐油管，包括油管本体，所述油管本体的内表面设有纳米TiO2改性氟碳防腐层，外表面设有防腐涂层，所述油管本体的两端设置有接箍。
优选地，所述纳米TiO2改性氟碳防腐层的厚度为80-150μm。
优选地，所述防腐涂层的厚度为50μm。
另一方面，本发明提供上述的防腐油管的制备方法，包括如下步骤：
步骤1，油管本体除油；
步骤2，油管本体除锈；
步骤3，在油管本体的内表面采用超音速喷涂工艺喷涂纳米TiO2改性氟碳涂料粉末；
步骤4，在油管本体的两端液压拧扣接箍；
步骤5，在油管本体外表面喷涂防腐油漆；
步骤6，打捆包装。
优选地，步骤1中，除油的方法是将油管本体浸泡在100-110℃的碱性溶液中1-2h，然后用清水冲净。
优选地，步骤2中，除锈的方法是将步骤1所得的油管本体放入酸液中浸泡5-10min,再用清水冲净。
优选地，步骤3中，所述纳米TiO2改性氟碳涂料是由硅烷偶联剂KH-550对纳米TiO2进行表面改性，再将改性后的TiO2纳米粒子添加到氟碳涂料中而得。
优选地，步骤3中，所述超音速喷涂工艺中，氧气流量与丙烷流量之比为4.2-5.6，喷涂距离为190mm-230mm，送粉量为30g/min-40g/min。
本发明的有益效果体现在：
本发明提供的防腐油管耐温性好，其最高工作温度可达130℃；耐磨性佳，是普通N80油管的4倍以上；涂层附着力强，与油管本体的剥离强度达13.5MPa；油管本体上的涂层碳化后，还可重新喷涂，进而达到重复使用的目的。
附图说明
为了更清楚地说明本发明具体实施方式或现有技术中的技术方案，下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍。在所有附图中，类似的元件或部分一般由类似的附图标记标识。附图中，各元件或部分并不一定按照实际的比例绘制。
图1为本发明一实施例提供的防腐油管的剖视图；
图2为本发明一实施例提供的防腐油管的涂层与油管钢体附着力试验的试验力-时间曲线图；
附图中，1-防腐涂层，2-油管本体，3-纳米TiO2改性氟碳防腐层。
具体实施方式
下面将结合附图对本发明技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本发明的技术方案，因此只作为示例，而不能以此来限制本发明的保护范围。
需要注意的是，除非另有说明，本申请使用的技术术语或者科学术语应当为本发明所属领域技术人员所理解的通常意义。
实施例1
本实施例提供一种防腐油管，包括油管本体2，油管本体2的内表面设有纳米TiO2改性氟碳防腐层3-纳米TiO2，外表面设有防腐涂层1，油管本体2的两端设置有接箍。
在本实施例中，纳米TiO2改性氟碳防腐层3-纳米TiO2的厚度优选为80-150μm。
在本实施例中，防腐涂层1的厚度优选为50μm。
实施例2
本实施例提供实施1中的防腐油管的制备方法，需要说明的是，油管本体2为钢体材质，具体包括如下步骤：
步骤1，油管本体2除油，除油的方法是将油管本体2浸泡在100-110℃的碱性溶液中1-2h，然后用清水冲净；
步骤2，油管本体2除锈，除锈的方法是将步骤1所得的油管本体2放入酸液中浸泡5-10min,再用清水冲净；
步骤3，在油管本体2的内表面采用超音速喷涂工艺喷涂纳米TiO2改性氟碳涂料粉末；纳米TiO2改性氟碳涂料是由硅烷偶联剂KH-550对纳米TiO2进行表面改性，再将改性后的TiO2纳米粒子添加到氟碳涂料中而得，超音速喷涂工艺中，氧气流量与丙烷流量之比为4.2-5.6，喷涂距离为190mm-230mm，送粉量为30g/min-40g/min。
步骤4，在油管本体2的两端液压拧扣接箍；
步骤5，在油管本体2外表面喷涂防腐油漆，可采用静电喷涂的方式；
步骤6，打捆包装。
实施例3
对实施例2制备出的φ76防腐油管一句《Q/SH1020 1942-2013抗磨抗腐油管通用技术条件》进行检测，情况如下：
实施例4
涂层耐温试验
分别取5块按照实施例2提供的方法制备出的防腐油管试样放入马弗炉内，然后程序升温控制温度在150℃、175℃、200℃、220℃、240℃、260℃，每个温度下维持2h，每个温度之后取出一块试样，用金属镊子横向刮擦，观察剥落情况：油管涂层在220℃时，内附图已经开始弹簧，与涂层的结合力下降，当升至240℃时，涂层碳化加重。
分别取6块按照实施例2提供的方法制备出的防腐油管试样放入马弗炉内，然后程序升温控制温度在230℃、200℃、180℃、160℃、140℃、130℃，每个温度下维持24h，每个温度之后取出一块试样，用金属镊子横向刮擦，观察剥落情况：从老化状态看出，当温度高于180℃时，涂层老化碳化，光泽性随温度升高变差，温度越高，涂层越呈碳化粒状剥落，可以认为180℃为涂层的老化碳化温度；当温度低于160℃时，温度越低，光泽性越好，涂层基本不碳化，高于130℃时，涂层与油管钢体的附着力较差，可被手工玻璃，130℃老化24h涂层无法手工从油管钢体玻璃，故认为次防腐油管最高工作温度为130℃。
实施例5
涂层耐磨损试验
取1块按照实施例2提供的方法制备出的防腐油管试样，在水介质中，最高温度60℃，线正压力为1000N/m，经1000h，约334.5万次的往复正压摩擦，与耐磨接箍进行往复式摩擦磨损试验，在涂层可见磨痕，但未磨穿暴露油管钢体，对比试样为N80油管，经失重法、厚度法和目测触感法评估，N80油管的磨损量约为该防腐油管的4倍。
实施例6
涂层与油管钢体附着力试验
取1块按照实施例2提供的方法制备出的防腐油管，将其切割成10mm×10mm的试样，采用《GB 8641-1988热喷涂层抗拉强度的测定》和《GB31586.1-2015防护涂料体系对钢结构的防腐保护涂层附着力/内聚力(破坏强度)的评定和验收准则》规定的测试方法进行附着力测试，得到的力-时间曲线如图1所示，从图中可以看出，涂层与油管钢体的最大试验力为0.89kN，剥离面积大约是试样面积(10mm×10mm)的三分之二，计算剥离强度约为13.5MPa。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围，其均应涵盖在本发明的权利要求和说明书的范围当中。
Claims (8)
1.一种防腐油管，其特征在于：包括油管本体，所述油管本体的内表面设有纳米TiO2改性氟碳防腐层，外表面设有防腐涂层，所述油管本体的两端设置有接箍。
2.根据权利要求1所述的一种防腐油管，其特征在于：所述纳米TiO2改性氟碳防腐层的厚度为80-150μm。
3.根据权利要求2所述的一种防腐油管，其特征在于：所述防腐涂层的厚度为50μm。
4.一种如权利要求1-3任一项所述的防腐油管的制备方法，其特征在于：包括如下步骤：
步骤1，油管本体除油；
步骤2，油管本体除锈；
步骤3，在油管本体的内表面采用超音速喷涂工艺喷涂纳米TiO2改性氟碳涂料粉末；
步骤4，在油管本体的两端液压拧扣接箍；
步骤5，在油管本体外表面喷涂防腐油漆；
步骤6，打捆包装。
5.根据权利要求4所述的一种防腐油管的制备方法，其特征在于：
步骤1中，除油的方法是将油管本体浸泡在100-110℃的碱性溶液中1-2h，然后用清水冲净。
6.根据权利要求4所述的一种防腐油管的制备方法，其特征在于：
步骤2中，除锈的方法是将步骤1所得的油管本体放入酸液中浸泡5-10min,再用清水冲净。
7.根据权利要求4所述的一种防腐油管的制备方法，其特征在于：
步骤3中，所述纳米TiO2改性氟碳涂料是由硅烷偶联剂KH-550对纳米TiO2进行表面改性，再将改性后的TiO2纳米粒子添加到氟碳涂料中而得。
8.根据权利要求7所述的一种防腐油管的制备方法，其特征在于：
步骤3中，所述超音速喷涂工艺中，氧气流量与丙烷流量之比为4.2-5.6，喷涂距离为190mm-230mm，送粉量为30g/min-40g/min。
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