Erosion-corrosion behavior of Pd-Co and Pd-Cu films on 316L stainless steel in simulated PTA slurry environment  

316L不锈钢表面Pd-Co膜层和Pd-Cu膜层在模拟PTA环境中的冲刷腐蚀性能（英文）

作　　者：李思锐[1] 左禹[1] 

机构地区：[1]北京化工大学材料电化学过程与技术北京市重点实验室,北京100029

出　　处：《Transactions of Nonferrous Metals Society of China》2016年第1期167-174,共8页中国有色金属学报（英文版）

基　　金：Project(2012BAE04B01) supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China

摘　　要：Pd-Co films with the Co content varying from 21.9% to 34.62%（mole fraction） and Pd-Cu（5% Cu, mole fraction） film were electrodeposited on 316 L stainless steel, and the erosion-corrosion resistance of the Pd-Co and Pd-Cu plated samples in a simulated boiling pure terephthalic acid（PTA） slurry environment was studied with methods of mass loss test, polarization measurement and scanning electron microscopy（SEM）. Under the static state condition, both the Pd-Cu and Pd-Co plated samples exhibit good corrosion resistance and the Pd-Cu film behaves slightly better. However, with increasing the stirring speed, the corrosion rate of the Pd-Cu plated samples increases obviously while that of the Pd-Co plated samples shows only slight increase. Higher microhardness and lower surface roughness of Pd-Co film than those of Pd-Cu film, as well as good corrosion resistance, may be the main reasons for better erosion-corrosion resistance in the strong reductive acid plus erosion environment.用电沉积方法在316L不锈钢表面制备Co含量为21.9%-34.62%（摩尔分数）的Pd-Co膜层和Cu含量为5%（摩尔分数）的Pd-Cu膜层,通过失重试验、极化曲线以及扫描电子显微镜等方法研究镀膜不锈钢试样在模拟纯对苯二甲酸（PTA）冲刷腐蚀环境中的耐冲刷腐蚀性能。结果表明：在静止环境中,Pd-Cu及Pd-Co膜层试样都表现出良好的耐蚀性,且Pd-Cu膜层试样的耐蚀性更优。但是,随着搅拌速度的增大,Pd-Cu膜层试样的冲刷腐蚀速率大大增加,而Pd-Co膜层试样的冲刷腐蚀速率仅有微小增加。与Pd-Cu镀层相比,Pd-Co镀层在所研究介质中的耐腐蚀性大致相当,但具有更高的硬度和更小的表面粗糙度,从而在具有冲刷环境的强还原性酸性介质中显示出优异的抗冲刷腐蚀性能。

关 键 词：Pd-Co film Pd-Cu film 316L stainless steel ELECTROPLATING EROSION-CORROSION PTA environment 

分 类 号：TG174.4[金属学及工艺—金属表面处理]