LTNF常温Ni－Fe合金镀层的耐蚀原因分析  

CAUSES OF SUPERIOR CORROSION RESISTANCE OF Ni-Fe ELECTRODEPOSITS PRODUCED AT AMBIENT TEMPERATURE

作　　者：黄树坤[1] 邹振华[1] 邝少林[1] 肖觉民[1] 吴力军[1] 

机构地区：[1]湖南大学化学化工系,湖南大学材料测试中心

出　　处：《中国腐蚀与防护学报》1995年第1期64-68,共5页Journal of Chinese Society For Corrosion and Protection

摘　　要：ＬＴＮＦ常温Ｎｉ－Ｆｅ合金镀层的耐蚀原因分析黄树坤，邹振华，邝少林（湖南大学化学化工系长沙４１００８２）肖觉民，吴力军（湖南大学材料测试中心）１前言通常的瓦特镀镍工艺在常温下得到的镍镀层发暗，应力大且耐蚀性差，不宜作为防护装饰性镀层使用．我们曾提出一...i-Fe electrodeposits obtained at ambient temperature possess superior corrosion resistance. Its cause was experimentally investigated by means of electronmicroscopy and X-ray distraction analysis. The results showed that both low-iron (5～7Wt%) and high-iron (20～25wt%) alloy deposits were homogeneous nickel-base solid solutiolls. In these deposits lower internal stress, smaller grain size and (100) texture me those obtained in the Watts nickel electrodeposit were obserVed. Besides, a lamellar structure composed of iron-rich and iron-depleted zones alternately made up a galvanic corrosion system which may prevent the underneath steel substrate from corrosion.

关 键 词：电镀 镍铁合金 LTNF 镀层 耐蚀性 

分 类 号：TQ153.2[化学工程—电化学工业]