摘要
以核电堆内构件螺栓为基体电镀硬铬,研究了镀液铬酸酐质量浓度、温度和电流密度对镀层性能的影响。结果表明,镀液温度和铬酸酐质量浓度对镀铬层显微硬度的影响较大,电流密度的影响较小,较佳的工艺条件为:CrO_(3)质量浓度230 g/L,温度55~60℃,电流密度25~35 A/dm^(2)。该条件下制备的镀铬层显微硬度、结合力、成分、厚度等均满足设计要求。
Hard chromium was electroplated on the bolts of nuclear reactor internals.The effects of CrO_(3) mass concentration,bath temperature,and current density on the properties of chromium coating were studied.The results showed that the microhardness of chromium coating was affected greatly by both temperature and CrO_(3) mass concentration,while slightly by current density.The optimal process conditions are as follows:CrO_(3) mass concentration 230 g/L,bath temperature 55-60℃,and current density 25-35 A/dm^(2).The microhardness,adhesion strength,elemental composition,and thickness of the chromium coating obtained thereunder meet the technical requirements.
作者
刘晓强
孟凡江
丁宗华
徐雪莲
林绍萱
LIU Xiaoqiang;MENG Fanjiang;DING Zonghua;XU Xuelian;LIN Shaoxuan(Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd.,Shanghai 200233,China)
出处
《电镀与涂饰》
CAS
北大核心
2021年第21期1615-1618,共4页
Electroplating & Finishing
基金
国家科技重大专项──大型先进压水堆及高温气冷堆(2019ZX06004-002)。
关键词
核电堆内构件
电镀
硬铬
显微硬度
结合力
厚度
nuclear reactor internal
electroplating
hard chromium
microhardness
adhesion
thickness