2Freeman D B. Phosphating and Metal Pretreatment-A Guide to Modern Processes and Practice[M].New York:Industrial Press Inc,1986.
3Jegannathan S,Sankara Narayanan T S N,Ravichandran K. Formation of zinc-zinc phosphate composite coatings by cathodic electrochemical treatment[J].Surface and Coatings Technology,2006,(12):4117-4126.