Ni对Cr_2O_3涂层孔隙率及耐蚀性的影响  

The Effect of Nickle on Porosity and Corrosion Resistance of Chromium Oxide Coating

作　　者：李水清[1] 糜亮[1] 丁毅[1] 马立群[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《表面技术》2011年第3期8-10,共3页Surface Technology

摘　　要：分别以纯Cr2O3陶瓷粉末、Ni粉和Cr2O3粉的混合粉末作为喷涂粉末,采用等离子喷涂技术在45钢表面喷涂Cr2O3涂层和Ni-Cr2O3涂层。通过X射线衍射、金相显微分析、扫描电镜分析、EDS成分分析、盐雾试验、电化学试验等方法,研究了Ni-Cr2O3和Cr2O3涂层的相组成、组织形貌、孔隙率以及耐蚀性。结果表明:由于Ni的加入,使得Ni-Cr2O3涂层与Cr2O3涂层相比,孔隙率大大降低,耐蚀性得到显著提高。Pure Cr2O3 ceramic powder, the mixed powder oi Ni and Cr2O3 as the spray powder, Crz（1）3 coating and Ni-Cr2O3 coating on 45 steel were prepared by plasma spraying . XRD, metallographic microscopic analysis, SEM, EDS, salt fog test, electrochemical test were used to study the phase composition, organization morphology, porosity and corrosion resistance of the Ni-Cr2O3 and Cr2O3 coating . The conclusions show that with the addition of nickel, the porosity of Ni-Cr2O3 coating is reduced greatly, and corrosion resistance can be further improved , compared with Cr2O3 coating.

关 键 词：等离子喷涂 Ni—Cr2O3涂层 孔隙率 耐腐蚀性能 

分 类 号：TG174.442[金属学及工艺—金属表面处理]