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为研究镍基合金镀层在北方老工业城市冬季降水中的腐蚀行为,采用电沉积技术制备了Ni--P、Ni--Fe合金镀层,对其结构与耐蚀性能进行检测.结果表明:不同镍基合金镀层在冬季降水中耐蚀性能不同,其中Ni--Fe合金镀层由于Fe掺杂增加了镍基合金与氧的亲和力,可以快速在Ni--Fe合金镀层表面形成一层连续的氧化膜,对基体起到很好的防护作用,电位最正,自腐蚀电流密度值最小,耐蚀性较好,年腐蚀速率约为20号钢的1/2;而Ni--P合金镀层表面形成氧化膜的速率较缓慢,阻抗值较低,不适合在北方老工业城市的室外装饰与防护中应用.
In order to study the corrosion behavior of Ni - based alloy coatings in the winter rainfall in old industrial cities in the north of China, Ni - P and Ni - Fe alloy coatings were prepared by electrodeposition technique and their structures and corrosion resistance were tested. The corrosion resistance of Ni - Fe alloy coating in winter precipitation is different. Ni - Fe alloy coating increases the affinity of Ni - based alloy with oxygen because of Fe doping, which can rapidly form a continuous oxidation on the surface of Ni - Fe alloy coating The film has a good protective effect on the substrate, the potential is the most positive, the self-corrosion current density is the smallest, the corrosion resistance is good, and the annual corrosion rate is about 1/2 of that of 20 steel. The surface of the Ni-P alloy coating The formation of oxide film slower, lower impedance value, not suitable for outdoor decoration and protection in the old industrial city of North China.