钢芯铝绞线钢芯表面植酸活化对化学镀Ni-P层耐蚀性的效用  

Effect of Phytic Acid Activation on Corrosion Resistance of Electroless Ni-P Plating on Steels from ACSR

作　　者：王艳鸿[1] 林德源[2] 陈云翔[2] 林海晴 邵艳群[1,3] 

机构地区：[1]福州大学至诚学院材料工程系,福建福州350002 [2]国网福建省电力有限公司电力科学研究院,福建福州350007 [3]福州大学材料科学与工程学院,福建福州350002

出　　处：《材料保护》2017年第5期5-8,共4页Materials Protection

基　　金：福建沿海区域电网设备腐蚀机理及综合治理技术研究(52130414004X);大学生创新性实验计划(201413470009)资助

摘　　要：为了提高钢芯铝绞线钢芯的耐蚀性,采用植酸对其活化再化学镀覆Ni-P合金,研究了植酸活化处理对钢芯钢表面Ni-P镀层耐蚀性的影响。采用SEM和EDS对Ni-P镀层腐蚀前后的形貌和成分进行了分析,在1mol/L H_2SO_4+3%NaCl混合溶液中测定了其极化曲线,比较了其腐蚀速率;利用超声波振荡法研究了植酸活化前后Ni-P镀层与基体的结合力。结果表明:钢芯表面经植酸活化后Ni-P镀层的胞状凸起细小,结构更加均匀、致密,与基体有较好的结合力;植酸活化后,Ni-P镀层的腐蚀电位变大,腐蚀电流减小,腐蚀9 h时Ni-P镀层表面几乎无变化。In order to improve the corrosion resistance of steel cores from the aluminum cable steel reinforced （ ACSR）, Ni - P alloy coating was prepared by electroless plating after the pre-activation of phytic acid, and the effect of phytic acid on the corrosion resistance of Ni- P coating was studied. The SEM and EDS were employed to characterize the morphology and composition of Ni-P alloy before and after corro- sion test. In addition, the polarization curve and the corrosion resistance were compared by immersion experiments in 1 mol/L H2SO4 ＋3 % NaCl, and the adhesion force between Ni-P coating and the substrate before and after activation by phytic aicd was studied by ultrasonic vibration method. Results showed that after activated by phytic acid, the Ni-P coating on the surface of steel core possessed smaller cellular bulge, more uniform and denser structure, and better adhesion force with the substrate. Besides, after activated by phytic acid, the corrosion potential of Ni-P coating increased, while the corrosion current decreased. For 9 h of corrosion test, little changes were observed on the sur- face of Ni-P coating.

关 键 词：化学镀NI-P 钢芯铝绞线 植酸活化 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]