Effect of TiN coating on corrosion fatigue strength of carbon steel

被引：0
|
作者：
Shiozawa, Kazuaki [1 ]
Ohshima, Seiji [1 ]
机构：
[1] Toyama Univ, Japan
来源：
Zairyo/Journal of the Society of Materials Science, Japan | 1990年 / 39卷 / 442期
关键词：
Protective Coatings - Vapor Deposition - Steel Corrosion - Corrosion Fatigue - Titanium Compounds;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In order to investigate the effect of titanium nitride (TiN) coatings on corrosion fatigue behavior cantilever-type rotating bending corrosion fatigue tests were carried out in 3.0% saline solution using round bar specimens of 0.37% C carbon steel, JIS S35C, coated with TiN by physical vapour deposition (PVD) or chemical vapour deposition (CVD). Improvement of corrosion fatigue strength was observed in TiN coated specimens compared with those without coatings. The corrosion fatigue crack propagation rate observed on the surface of a coated specimen was equivalent to that without coating. Fracture surface observations with a scanning electron microscope revealed that the corrosion fatigue crack propagated from small corrosion pits formed at the base metal under the coating layer due to aqueous solution transmitted throughout small pinholes or flaws of the coating. The TiN layer does not peel off from the substrate surface owing to its adhesion, and corrosion resistance of the layer itself is greater than that of the substrate metal.
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页码：958 / 964
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