助剂对聚脲涂层在除盐水中长期浸泡溶出的影响  

Effects of additives in polyurea coatings on their dissolution behaviors during long-term immersion in demineralized water

作　　者：星成霞[1] 李永立[1] 廖有为[2] XING Chengxia;LI Yongli;LIAO Youwei(North China Electric Power Research Institute,Beijing 100045,China;Central South University of Forestry and Technology,Changsha 410000,China)

机构地区：[1]华北电力科学研究院有限责任公司,北京100045 [2]中南林业科技大学,湖南长沙410000

出　　处：《电镀与涂饰》2025年第1期96-100,共5页Electroplating & Finishing

摘　　要：[目的]电厂除盐水箱内壁聚脲防腐涂层溶出导致的水箱出水电导率和有机物含量超标的问题亟待解决。[方法]将聚脲涂层试片浸泡于除盐水中,测定总有机碳(TOC)溶出量,然后采用气相色谱-质谱法(GC-MS)对试片浸泡液中的有机物组分进行分析,采用电感耦合等离子发射光谱法(ICP-OES)对溶出无机元素的含量进行测定。[结果]根据测定结果,对比聚脲涂料的配方,确定了溶出物来自A组分的高沸点溶剂,以及B组分的助剂和填料。[结论]从原材料的角度,提出了一些降低除盐水箱内壁聚脲防腐涂层溶出的建议,如涂料中不添加阻燃剂、抗氧化剂,少使用消泡剂、稀释剂和增塑剂,选择低黏度物料和不溶于水的填料。[Objective]It is imperative to address the issues of excessive electrical conductivity and organic matter content in the demineralized water tanks,which arise from the dissolution of anticorrosive polyurea coatings on their inner walls in power plants.[Method]Based on the analysis of total organic carbon(TOC)in the demineralized water where polyurea-coated specimens were immersed,the organic matters dissolved in the demineralized water were analyzed by gas chromatography-mass spectrometry(GC-MS),while the inorganic elements were determined through inductively coupled plasma optical emission spectrometry(ICP-OES).[Result]The determination results were compared with the composition of polyurea paint,indicating that the dissolution primarily originated from high-boiling-point solvents in component A of the polyurea paint as well as additives and fillers contained in component B.[Conclusion]Several recommendations were proposed from the perspective of raw materials to mitigate the dissolution of polyurea coatings on the inner walls of demineralized water tanks,such as unused of flame-retardant agents and antioxidants,less use of defoamers,thinners,and plasticizers,and use of low-viscosity materials and water-insoluble fillers.

关 键 词：聚脲涂层 除盐水 溶出 助剂 有机物 元素 检测 控制措施 

分 类 号：O656.2[理学—分析化学] TQ630.72[理学—化学]