Ni-P-纳米TiO2复合镀层的耐蚀性研究

采用全浸泡腐蚀试验，系统研究了Ni—P-纳米TiO2复合镀层在HCl、H2SO4、HNO3、NaOH和NaCl溶液中的耐腐蚀性能。结果表明，Ni—P-纳米TiO2复合镀层比Ni—P化学镀层具有更优异的耐酸、耐碱、耐盐腐蚀的性能；复合镀层在盐和碱性腐蚀液中的耐蚀性优于酸性腐蚀液；Ni—P一纳米TiO2复合镀层在不同腐蚀液中的腐蚀形态明显不同，复合镀层在NaOH、NaCl和HCl溶液中的腐蚀形态为均匀腐蚀型，而在H2SO4和HNO3强氧化性介质中的腐蚀形态则为点蚀穿透型；保持镀层在腐蚀液中的完整性对提高镀层的耐腐蚀性能至关重要。

Corrosion-resistance of Ni-P-nano TiO2 Electrolyte Compound Plating

The corrosion resistance of the Ni-P-nano TiO_2 electrolyte compound plating immersed in the different solutions including HCl,H_2SO_4,HNO_3,NaOH and NaCl was systematically exaimined by the full-soak corrosion testing.Results indicated that the Ni-P-nano TiO_2 compound plating possesses the higher corrosion resistance to acid,alkali and salt comparing with the Ni-P electrolyte plating.The corrosion resistance of the compound plating in salt and alkali solutions is superior to that in acid solution.The corrosion morphology of the compound plating belongs to uniformly corrosion shape in NaOH,NaCl and HCl solutions while belongs to pitting corrosion in H_2SO_4,HNO_3 solutions.It is significantly important for improving the corrosion resistance to keep the integrality of the Ni-P-nano TiO_2 electrolyte compound plating in the erosion solution.