PAA对核电厂中腐蚀产物氧化铁分散的影响  

Effect of Polyacrylic Acid on the Suspension of Magnetite in Nuclear Power Plants

作　　者：施墨操 林明贵 刘志坤 池利生[1] SHI Mocao;LIN Minggui;LIU Zhikun;CHI Lisheng(Fujian Province Joint Innovation Key Laboratory of Fuel and Materials in Clean Nuclear Energy System,Fujian Institute of Research on the Structure of Matter,CAS,Fuzhou of Fujian Prov.350002,China;University of the Chinese Academy of Sciences,Beijing 100049,China;Fujian Environment Radiation Supervision Station,Fuzhou of Fujian Prov.350012,China)

机构地区：[1]福建清洁核能系统燃料和材料联合创新重点实验室,中国科学院福建物质结构研究所,福建福州350002 [2]中国科学院大学,北京100049 [3]福建省辐射环境监督站,福建福州350012

出　　处：《核科学与工程》2022年第2期280-287,共8页Nuclear Science and Engineering

基　　金：FJIRSM&IUE联合研究基金(rhzx-2018-006)。

摘　　要：高纯聚丙烯酸(PAA)已在核电厂试验用于控制蒸汽发生器中腐蚀产物的沉积,但实验室研究聚丙烯酸对腐蚀产物的分散效果还鲜有报道。本文使用分光光度法研究了PAA对Fe_(3)O_(4)的分散作用及用红外光谱法研究了Fe_(3)O_(4)对PAA的吸附作用。分散试验结果表明,加入10 000 mg/kg的PAA可以提高Fe_(3)O_(4)在溶液中的分散性,而红外光谱研究表明PAA以单核单齿方式吸附在Fe_(3)O_(4)表面。PAA在Fe_(3)O_(4)表面上吸附量与溶液pH值和PAA浓度有关。Highly pure polyacrylic acid has been tested in nuclear power plants for controlling of corrosion products in steam generators, but there are few studies conducted on the effect of PAA on dispersing of corrosion products. In this paper, the effect of polyacrylic acid on dispersion of magnetite was studied by spectrophotometry and the adsorption of polyacrylic acid onto magnetite was studied by infrared spectroscopy. Dispersion test results show that PAA added at 10 000 mg/kg can improve the dispersion of magnetite in the solution. The IR study reveals that polyacrylic acid is adsorbed onto the surfaces of magnetite via monodentate mode. The amount of polyacrylic acid adsorbed onto magnetite seems to be dependent on the p H and concentration.

关 键 词：核电厂 四氧化三铁 聚丙烯酸 吸附 分散 机理 

分 类 号：TG174[金属学及工艺—金属表面处理]