Influence of Additive on Structure and Corrosion Resistance of Manganese Phosphate Film on AZ91 Magnesium Alloy

摘要：

Manganese phosphate conversion coating was prepared by adding addition agent towards phosphate bath. The structure was investigated using SEM/EDX, and the anti-corrosion performance was evaluated by electrochemical technique. It was found that the film presented in crystal structure, and the crystalloid grain transformed from large grain toward small particles upon the addition. The corrosion resistance was studied by polarization curves and EIS in 3.5％NaCl. Polarization curves showed that the corrosion potential of the coating shifted remarkably towards positive direction comparing with that of AZ91 substrate. EIS results indicated that the radius of the capacity impedance for phosphate film increased distinctly, which validated the excellent anti-corrosion performance of the film.

关键词： magnesium alloys phosphate conversion coating addictive corrosion resistance

作者: W.Q. Zhou W. Tang Q. Zhao S.W. Wu E.H.Han

作者单位: College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, China State Key College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, China State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of S

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 176-180

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）