酸浓度对锆合金酸洗反应动力学行为影响  

Effect of Concentration on Pickling Reaction Kinetics of Zirconium Alloy

作　　者：刘云明[1] 刘超红[1] 李传锋[1] 陈建刚[1] 刘利剑[1] 杜沛南 钱芳[1] LIU Yun-ming LIU Chao-hong LI Chuan-feng CHEN Jian-gang LIU Li-jian DU Pei-nan QIAN fang(Nuclear Power Institute of China,Chengdu,610213)

机构地区：[1]中国核动力研究设计院,四川成都610213

出　　处：《核科学与工程》2016年第4期571-577,共7页Nuclear Science and Engineering

基　　金：ITER项目2012GB106004;自然科学基金91226203

摘　　要：为获取锆合金酸洗表面处理动力学行为数据,采用浸泡酸洗法研究了硝酸和氢氟酸浓度对锆合金酸洗速率的影响。结果表明:氢氟酸对锆合金具有强烈的溶解作用,其浓度对酸洗速率具有指数影响关系,符合液相反应动力学关系式;硝酸对锆合金没有溶解作用,其浓度对酸洗速率有缓蚀作用,具体表现为降低速率常数和反应级数。氢氟酸溶解作用和硝酸的缓蚀作用达到平衡时,可避免锆合金表面出现过酸洗现象且表面光亮洁净,稳定的合理的浓度范围为4.33mol/L<HNO3<7.22mol/L、0.68mol/L<HF<1.60mol/L,且随HF酸浓度增加HNO_3浓度相应增加。To understand the zirconium-4alloy pickling-dynamic behavior,the effect of concentration on pickling rate of zirconium alloy was studied in this paper by socked method.The result shows that zirconium alloy has been strongly corroded in HF which concentration on pickling rate has an exponential relation and keeps to liquid reaction kinetics,and zirconium alloy has been hardly corroded in HNO3 which concentration on pickling rate has restrained in solution and depresses the rate constant and order of reaction.When the balance is got between the corrosion of HF and the inhibit-corrosion of HNO3,zirconium alloy surface becomes brightness and undefiled.The steady and reasonable concentration is 4.33mol/L〈 HNO3〈7.22mol/L and 0.68mol/L 〈HF〈1.60 mol/L,and concentration of HF increase accordingly with concentration of HNO3.

关 键 词：锆合金 酸液浓度 酸洗速率 溶解腐蚀 

分 类 号：TL341[核科学技术—核技术及应用]