Corrosion Behavior of Arc Spraying Nickel Based Coating
In this paper, Ni-based cored wires were prepared by using NiCr strip to wrap metal powders of Ni, Cr, Mo, CrB. Nibased coatings were prepared by electric arc spraying process. The microstructures of Ni-Cr-Mo and Ni-Cr-B coatings were investigated by means of scanning electron microscopy (SEM) and energy-dispersive analysis (EDAX) and X-ray diffraction (XRD) analysis. The coatings have compact surface and presented the bonding strength higher than 40MPa. Corrosionresistance performance of coatings was evaluated by saltspray- test and electrochemical corrosion test. The results showed that Ni-based coatings containing Mo (5％) element or B element (2-4％) had better anti-chlorine ion corrosion performance than that of Ni-based coatings without Mo element, and PS45 (Ni-Cr-Ti) coating. The anti-chlorine ion corrosion coatings could be used for resolving the corrosion protection problem of the equipments and piping contacting sour, alkali, salt liquid in the petrochemical engineering.
D.-Y He N. Dong J.-M. Jiang
College of Materials Science and Engineering, Beijing University of Technology, Beijing, China
国际会议
北京
英文
2007-05-14（万方平台首次上网日期，不代表论文的发表时间）