利用低压化学气相沉积技术(LPCVD),在钻杆接头表面制取Ti、Cr、A1的氮化物、碳化物和氧化物构成的金属陶瓷膜层.陶瓷膜的特性通过SEM、EDS和XRD分析.结合性能和腐蚀性能分别通过划痕试验和腐蚀实验测试.结果表明:陶瓷膜层致密而均匀,膜厚度在15 μm左右,且在膜层与基体之间还形成了一层厚5μm左右的过渡层.陶瓷复膜与基体材料结合性能良好,具有较好的致密性,不存在裂纹气孔等缺陷.陶瓷膜层有效阻隔了有害原子或离子与基体钢的接触,防止材料发生氢鼓泡、氢致开裂等,大大提高了钻杆接头材料的抗腐蚀性能.
A metallic ceramic film consisting of nitrides,carbides and oxides of Ti,Cr and A1 was prepared on the surface of a drilling pipe joint by low pressure chemical vapor deposition (LPCVD).The film was characterized by scanning electron microscopy (SEM),energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD).The adhesive ability and the corrosion resistance performance were evaluated by scratch test and corrosion test,respectively.The results show that the film is dense and homogeneous with 15 μm in thickness including a 5 μm transition layer.The film presents a good adherence to the substrate with no cracks and no pores.It could decrease electrochemical corrosion and chemical corrosion through separating the harmful atoms or ions from the substrate.Particularly,it could also effectively prevent H2S and CO2 from contacting the steel,avoiding hydrogen blistering (HB) and hydrogen to induce cracking (HIC).Consequently,the service life of drilling pipe can be greatly improved.
参考文献
| [1] | Ghatu Subhash;Philip Hittepole;Spandan Maiti .Mechanical properties of PECVD thin ceramic films[J].Journal of the European Ceramic Society,2010(3):689-697. |
| [2] | Ramesh M. Krishna;Timothy C. Hayes;Daniel Krementz;George Weeks;Adrian Mendez Torres;Kyle Brinkman;Krishna C. Mandal .Characterization of transparent conducting oxide thin films deposited on ceramic substrates[J].Materials Letters,2012(1):233-235. |
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