【作者】 刘燕； 朱子新； 马洁； 栗卓新； 马世宁； 徐滨士；

【Author】 Liu Yan , Zhu Zixin, Ma Jie, Ld Zhuoxin, Ma Shining, Xu Binshi(National Key Laboratory for Remanufacturing, Beijing 100072 , China ;The college of Materials Science and Engineering , Beijng University of Technology, Beijing 100022 , China ;Center of Air Force Oil Monitor, Beijing 100072, China;Department of Chemistry, Capital Normal University, Beijing 100037, China)

【机构】 装备再制造技术国防科技重点实验室； 首都师范大学化学系； 北京工业大学材料科学与工程学院；

【摘要】 采用高速电弧喷涂和粉芯丝材技术制备Zn-Al-Mg及Zn-Al-Mg-RE新型防腐涂层。采用电化学阻抗谱(EIS)法考察涂层的耐蚀性,并结合涂层腐蚀产物X射线衍射(XRD)及涂层腐蚀后表面形貌SEM分析,研究涂层的耐蚀性。对比试验表明:Zn-Al-Mg涂层在腐蚀后形成较致密的腐蚀产物,自封闭作用较为明显,但腐蚀产物层不够稳定;Zn-Al-Mg-RE涂层由于RE元素的添加,减小了涂层中的孔隙率、提高了涂层的致密度,从而加大了涂层的自封闭效果,提高了腐蚀产物层的稳定性,使Zn-Al-Mg涂层的耐蚀性进一步提高。更多还原

【Abstract】 High velocity arc spraying (HVAS) and cored wires techniques were applied to produce Zn-Al-Mg and Zn-Al-Mg-RE new pattern anti-corrosion coatings on low carbon steel substrates. Corrosion properties of such two coatings were investigated by means of EIS (Electrochemical Impedance Spectroscopy) measurement, and corrosion mechanism were studied in conjunction with the XRD results of corrosion products and SEM analysis of corrosion surface. By comparison , it was found that Zn-Al-Mg coating generates therelatively dense products after corrosion, which is useful to enhance the self - sealing function, but the corrosion products layer is not so stable; RE reduces the porosity and enhances the density of the coating with the addition to Zn-Al-Mg coating. Furthermore, it increases the self-sealing effect of the coating, thus to improve the stability of the corrosion products layer and to enhance the anti-corrosion property of Zn-Al-Mg coating.更多还原