采用超音速火焰喷涂技术在45钢基体上制备Fe基合金涂层。通过X射线衍射仪、扫描电子显微镜和电化学腐蚀等测试技术研究了喷涂距离对涂层表面形貌、结构及腐蚀性能的影响。结果表明,喷涂距离对于涂层形貌和结构有较大的影响,喷涂距离过长或者过短都不利于非晶涂层的获得。耐腐蚀试验表明,Fe 基非晶涂层具有良好的耐腐蚀性能。表面形貌观察表明,合金涂层的腐蚀产物随喷涂距离的增加而增多,并伴有大量腐蚀坑和脱落现象的出现。
Fe-based alloy coating has been deposited by high velocity oxy fuel spraying.Morphology,microstruc-ture,precipitated phase and corrosion resistance of Fe-based alloy coating have been studied by X-Ray diffrac-tion (XRD),scanning electron microscope (SEM)and electrochemical corrosion with different spraying dis-tance.The morphology and microstructure are seriously influenced by spraying distance.Neither too long nor too short are unfavorable to the formation of amorphous coating.Corrosion behavior of Fe-based amorphous al-loy coating has been examined in simulated seawater solution.The results show that the amorphous coating pos-sesses well corrosion resistance.SEM observation of corroded surface shows that the corrosion products get thicker with the increase of spraying distance,and accompanied by the emergence of a large number of corrosion pit.
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