摘要
为制备性能良好的耐腐蚀涂层,用气雾化方法制备Fe基和Al基两种非晶粉末,然后采用冷喷涂工艺(CS)和大气等离子喷涂工艺(APS)分别制备非晶涂层,并利用扫描电镜(SEM), X射线衍射仪(XRD)和电化学等方法研究两种非晶涂层微观形貌、相组成和耐腐蚀性等性能。实验表明:采用冷喷涂方法制备非晶涂层非常困难,而采用大气等离子喷涂工艺制备涂层容易。因此本研究主要内容是大气等离子喷涂制备非晶涂层及涂层的耐腐蚀性能。对Fe基非晶材料而言,大功率制备的涂层耐腐蚀性能较小功率制备的好,但寿命差别不明显。最终获得7075铝合金、 Fe基和Al基非晶涂层耐3.5%(质量分数)盐水浸泡寿命分别约为1236, 1658和2147 h。从Fe基和Al基非晶材料角度看,尽管Fe基采用几种优化工艺制备,但Fe基非晶涂层耐腐蚀性能依然较Al基非晶差。相对来说,采用大气等离子喷涂工艺制备Al基非晶涂层耐腐性能较好,可对铝合金表面进行腐蚀防护,在航空、航海领域具有广阔的用途。
In order to prepare good anti-corrosion coatings, Fe-based and Al-based amorphous powders were prepared using gas atomization, and then these powders were sprayed using cold spray(CS) and atmospheric plasma spraying technical(APS) methods. Microstructure, phase composites and corrosion resistance were systematically studied and compared by scanning electron microscopy(SEM), X-ray diffraction(XRD) and electrochemical ways. The results showed that Fe and Al-based amorphous coatings were formed difficultly using cold spray. Therefore, APS was adopted to prepare Fe and Al-based amorphous coatings. For Fe-based coatings, the larger of spray power was, the better of the anti-corrosion was, but the effects were not obvious. Finally, the anti-corrosion life was about 1236, 1658 and 2147 h for 7075 aluminum, Fe-based and Al-based amorphous coatings in 3.5%(mass fraction) NaCl solution, respectively. Comparing Fe and Al-based amorphous coatings, Fe-based amorphous coatings had poorer properties than that of Al-based amorphous coatings although Fe-based amorphous coatings were prepared and optimized under several different technical parameters. The results showed that Al-based amorphous coatings prepared using APS had better properties and they could be used to protect 7075 alloys very well, which possessed a nice foreground in the applications of aviation and navigation.
作者
靳磊
周海滨
黄早早
张婷
支歆
Jin Lei;Zhou Haibin;Huang Zaozao;Zhang Ting;Zhi Xin(Science and Technology on Power Beam Process Laboratory,China Aviation Manufacturing Technology Research Institute,Beijing 100024,China;Beijing Huadexing Technology Co.Ltd.,Beijing 100000,China;Light Industry College,Liaoning University,Shenyang 110036,China)
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2019年第12期1316-1324,共9页
Chinese Journal of Rare Metals
基金
国防科技重点实验室基金项目(KZ041605114)资助
关键词
Fe基非晶涂层
Al基非晶涂层
冷喷涂
大气等离子喷涂
耐蚀性能
Fe-based amorphous coatings
Al-based amorphous coatings
cold spray
atmospheric plasma spray
anti-corrosion properties
