1Preikschat. Chromate-free conversion layer and process for producing the same[P]. U S Pat: 6287704,2001-09-11
2Paul C,Craig V. Reeplacing hexavalent chromium in passivation on zinc plated parts[J]. Powder Coating, 2004,(9):21-23
3Oshima,Katsuhide. Processing solution for forming hexavalent chromium free and corrosion conversion film on zinc or zinc alloy plating layers[P]. U S:Pat:68580982005-09-22
4Crotty. Non-peroxide trivalent chromium passivate composition and process[P]. U S Pat. :4578122,1986-01-13
5Da Fonte. Trivalent chromium passivate solution and prosess[P]. U S Pat: 4359345.1982-11-16
6Schneider,George. Coating solution having trivalent chromium and manganese for coating metal surface[P]. U S Pat: 3932198.1976-01-13
7Bishop. Iridecent chromium coatings and method[P]. U S Pat: 5393354,1995-02-28
8Nabil Zaki. Trivalent chrome conversion coating for zinc and zinc alloys[J]. Metal Finishing,2002,100(1):492-501
9Gutcho. Metal surface treatment[M]. USA .Noyes Datu Corporation.New Jerse.1982,120-122
