CN106947391B - 一种防污涂料及其在核电站冷却海水循环管道防污中的应用 - Google Patents
一种防污涂料及其在核电站冷却海水循环管道防污中的应用 Download PDFInfo
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Abstract
本发明公开了一种防污涂料及其在核电站冷却海水循环管道防污中的应用,该防污涂料由以下成分组成:液体松香树脂、氧化亚铜、分散助剂、铁红、氯化橡胶树脂液、钛白粉、消泡剂、纳米碳酸钙、防尘助剂和溶剂,所述溶剂含二甲苯。本发明通过特别设计的毒料承载配方,使其能够在长效服役期间缓慢均匀地溶解于海水中并将承载的毒料释放出来,防效期可长达5年,服役期间不需要对漆膜进行检查和修复,特别适用于海水循环管道或低航速的船舶。
Description
技术领域
本发明涉及涂料化工技术领域,特别是一种防污涂料及其在核电站冷却海水循环管道防污中的应用。
背景技术
海洋生物对于海洋构筑物的主要危害是加速钢材腐蚀,其自身重力负担也使船航运速度下降进而造成染料的浪费、二氧化碳排放过剩等。防污涂料能够有效延缓海洋生物附着,有机锡(TBT)具有广谱杀菌效果,但有机锡自抛光防污涂料体系会对环境产生副作用已经禁止使用。
目前不含有机锡的自抛光防污涂料主要有三种:以丙烯酸铜聚合物、丙烯酸锌聚合物、丙烯酸硅烷酯聚合物为基料的防污涂料,防污期一般在2年左右。公开号CN101550305A的中国专利公开了一种长效自抛光防污漆,主要功效成分为丙烯酸铜树脂和复合有机防污剂,适用于船底部位作为防污漆使用,能在3~5年内有效防止海生物对船底的污损。
核电站冷却海水循环管道常年浸泡在海水中且无法像船只那样移动,因此海洋生物污染更加容易和严重,目前还没有专门用于核电站冷却海水循环管道的长效防污涂料,因此提出本发明。
发明内容
本发明的目的是提供一种防污涂料,防污年限长,特别适用于核电站冷却海水循环管道的长期效防污。
防污涂料使用过程中长期浸泡于海水,又需要达到5年期长效防污,因此如何有效控制毒素长时间且均匀的释放,以及控制防污漆涂层的减薄速率是重中之重,在涂料配方设计时需要考虑各组分互相配合后能够达到上述效果。
本发明提供的防污涂料,由以下成分组成:液体松香树脂、氧化亚铜、分散助剂、铁红、氯化橡胶树脂液、钛白粉、消泡剂、纳米碳酸钙、防尘助剂和溶剂,所述溶剂含二甲苯。
松香树脂是重要的缓慢水溶性树脂原料,氧化亚铜是毒性因子,配方中的松香树脂的溶解速率是本防污涂料的防污年限的保证和关键,影响溶解速度的因素除了溶剂本身与松香树脂的相互作用外,还有整个涂料体系各成分之间的相互作用,以及与海水中化学成分的作用。上述配方中选用液体松香树脂与氯化橡胶树脂作为氧化亚铜的主要载体,同时辅以纳米碳酸钙以及含有二甲苯的溶剂,能够保证树脂的均匀水解带动氧化亚铜的缓慢释放,在服役期间不会过快或过慢地溶解于海水中,达到长效防污作用。纳米级碳酸钙主要是能适当降低涂料表面自由能,使涂层表面光滑的作用。
作为其中一个优选方案,上述防污涂料中,各成分用量按重量份数计为:
作为其中一个优选方案,上述防污涂料中,所述溶剂由二甲苯和改性松香基聚氧乙烯液组成。改性松香基聚氧乙烯液是有松香和聚氧乙烯反应制成的松香聚氧乙烯衍生物非离子表面活性剂,用在本发明配方中,对于树脂的溶解速度能够起到更好的调节作用,有效延长防污年限至5年。
更优选地,上述防污涂料中,改性松香基聚氧乙烯液占防污涂料总质量的2~3份。
本发明还提供了以上任一所述的防污涂料的制备方法,是先将液体松香树脂、氯化橡胶树脂液、铁红、纳米碳酸钙、氧化亚铜、钛白粉和部分溶剂混合,分散均匀后置于研磨机中研磨至细度40μm以下成为前练浆;前练浆置于干净的搅拌釜中,在搅拌情况下依次加入分散助剂、消泡剂、防尘助剂和剩余溶剂,混合均匀并搅拌至细度40μm以下;过滤包装。
本发明还提供了以上任一所述的防污涂料在核电站冷却海水循环管道防污中的应用。
与现有技术相比,本发明具有如下有益效果:
本发明通过特别设计的毒料承载配方,使其能够在长效服役期间缓慢均匀地溶解于海水中并将承载的毒料释放出来,防效期可长达5年,服役期间不需要对漆膜进行检查和修复,特别适用于海水循环管道或低航速的船舶。
附图说明
图1为实施例2三种防污涂料海水静置浸泡性能测试结果。
图2为实施例2动态模拟性能测试结果,图中4451为对照涂料。
图3是实施例2动态模拟实验涂膜消耗速度曲线。
图4是实施例2防污漆涂层配套4200h海水浸泡试验结果和4200h阴极剥离试验结果。
具体实施方式
为了使本技术领域的人员更好地理解本发明方案,下面结合具体实施方式对本发明作进一步的详细说明。
实施例1防污漆制备
表1长期效防污涂料配料
请补充一下两个测试涂料的配方。
制备方法:
由二甲苯和改性松香基聚氧乙烯液组成溶剂。先将液体松香树脂、氯化橡胶树脂液、铁红、纳米碳酸钙、氧化亚铜、钛白粉和部分溶剂混合,分散均匀后置于研磨机中研磨至细度40μm以下成为前练浆;前练浆置于干净的搅拌釜中,在搅拌情况下依次加入分散助剂、消泡剂、防尘助剂和剩余溶剂,混合均匀并搅拌至细度40μm以下;过滤包装。
实施例2产品性能测试
对实施例1两种配方的防污涂料进行性能检测,同时以某市售常用无锡自抛光防污漆作为对照。
防污性能动态模拟参照GB/T7789-2007;海水中涂层耐阴极剥离试验参照GB/T7790-2008;防污漆涂层浅海浸泡性参照GB/T5370-2007;自来水浸泡是用40℃自来水浸泡4个月涂膜。防污涂料4200h的海水浸泡与4200h海水浸泡后的阴极剥离实验是执行挪威NORSOK M501相应标准。
性能检测结果:
1、海水静置浸泡性能测试
某海域浸泡62个月,结果参见图1,最左侧为常规对照产品,可见海洋生物附着非常严重,已经无法看到钢板本身了。编号5542和5543的钢板涂刷本发明防污漆,浸泡后只有非常少量的小体积海洋生物附着,漆膜表面仍然较为光滑完整。
2、动态模拟性能测试:
动态模拟试验是模拟防污漆在服役期间涂层减薄的厚度,与时间关联形成相对速率。是考察防污性能的重要指标。
试验中圆周速度:3~10节(1.54m/s~5.14m/s)模拟循环水管道流速。每个周期=200h动态模拟实验+1个月时间海水浸泡。共进行10个周期。
结果参见图2,对照产品涂膜已经出现较为严重的起泡开裂现象,而编号5542和5543涂膜仍然光滑平整。
动态模拟实验涂膜消耗速度曲线参见图3,编号5542和5543的涂膜损耗速度和服役时间一直呈现良好的线性关系,说明其在服役过程中持续发挥防污作用。
3、40℃自来水浸泡性能测试
编号5542和5543的涂膜在40℃自来水浸泡4个月涂膜无开裂现象,对照产品出现较为严重的开裂。
4、配套中的环氧底漆(编号5542)4200h的海水浸泡与4200h海水浸泡后的阴极剥离实验是执行挪威NORSOK M501相应标准。通过4200h模拟实验来验证涂层配套在自然状态的恶劣海工条件下的20年寿命周期。通过模拟实验证明其环氧底漆涂层配套完全达到标准M501技术要求。
以上实施例的说明只是用于帮助理解本发明的核心思想。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以对本发明进行若干改进和修饰,这些改进和修饰也落入本发明权利要求的保护范围内。
Claims (4)
2.根据权利要求1所述的防污涂料,其特征在于,改性松香基聚氧乙烯液用量为2~3份。
3.权利要求1或2所述的防污涂料的制备方法,其特征在于,先将液体松香树脂、氯化橡胶树脂液、铁红、纳米碳酸钙、氧化亚铜、钛白粉和部分溶剂混合,分散均匀后置于研磨机中研磨至细度40μm以下成为前练浆;前练浆置于干净的搅拌釜中,在搅拌情况下依次加入分散助剂、消泡剂、防尘助剂和剩余溶剂,混合均匀并搅拌至细度40μm以下;过滤包装。
4.权利要求1或2所述的防污涂料在核电站冷却海水循环管道防污中的应用。
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