TiN涂层的耐腐蚀性能

Corrosion Resistant Properties of TiN Coating

本文对ＴｉＮ涂层的耐腐蚀性能进行了试验研究。除采用几种较弱的腐蚀介质外，还在Ｈ２ＳＯ４溶液、ＨＣｌ溶液中对ＴｉＮ涂层样品做了浸泡试验。所有结果表明：涂层后的样品。其耐腐蚀性能比未涂层样品提高几倍至十几倍。同时，在 ＮａＣｌ溶液、人工汗液和酸溶液中，分别测定了涂层和未涂层样品的电化学行为。ＴｉＮ涂层表现出较高的溶解电位，说明它在热力学上。对上述化学介质是比较稳定的。致密ＴｉＮ涂层的耐腐蚀能力优于不锈钢，但是如果涂层有贯穿的针孔或涂展太薄时，则涂层试样也会被腐蚀。

In this paper, the corrosion resistant properties of TiN coating are studied. The corrosion tests of sample coated TiN were also made in H2SO4 solution,HCl solution except several weak corrosive media. The results show that the corrosion resistance of coated samples are better than those uncoated. Electrochemical properties of the samples and substrates coated TiN were investigated in 20% H2SO4,man made sweat and 5% HCl solutions. Samples coated TiN show higher dissolving potential. It is shown that the TiN coating is thermodynamically stable to the chemical media mentioned above. The coated samples can also be corroded if there are some penetrating pinholes in the coating or the coating is too thin.