换热器镀层工艺研究

Research on plating process of heat exchanger

通过理论分析和工艺试验等方式,探索了由性能差异较大的不同材料组成的换热器选择性电镀工艺方法。采用局部遮蔽、浸蚀溶液的选择、预镀工艺的确定等方式,保证了组合件上各型面、各材料上的镀层质量,换热器上局部镀覆层既满足钎焊性,同时又满足高温抗氧化性的功能要求,并顺利完成了钎焊和热试车。本研究成果已在多个结构复杂的换热器上得到推广应用。

Based on theoretic analysis and process tests,the selective plating process of a heat exchanger made of different materials with large performance difference is investigated.The coating quality on different profiles and materials of the heat exchanger assembly is guaranteed by partial sheltering,etching solution selection and pre-plating process.The function requirements of solderability and high temperature oxidation resistance on each local coating of heat exchanger are satisfied.Therefore,the subsequent brazing and hot firing were successfully achieved.The plating process mentioned above has been applied to several heat exchangers with complex structure.