wet strip dried for a total spray time of 5 seconds xvii air wiping and hot air drying of the strip at a temperature of about 250 u00b0 f for 4 seconds and the above described sequence of process steps resulted in a zinc free surface of mild steel and zinc coated side having conventional hot dip galvanize spangle characteristics the zinc coating had excellent adhesion and coating weights were in the range of 0 26 to 0 46 oz ft 2 the zinc coated side had bare edges of up to 0 25 inches the non zinc coated side was found to react identically to normal cold rolled steel with respect to painting pretreatments such as zinc phosphating the surface finish of the non zinc coated side was not found to have significantly altered during the process therefore in continuous pilot plant operation the coating rapidly produced from parker 901 on the mild steel surface effectively prevents the galvanizing of the so treated side of the steel strip the coating was readily removed from the one side galvanized strip and the coating and subsequent removal operations did not adversely affect the mild steel strip surface the procedure outlined in example 2 was repeated except that in this instance the pretreatment step vi was omitted the non fluxed side of the strip was found to have a generally spotty zinc pick up with a zinc coated edge of approximately 0 5 to 0 8 inches in width thus when the non fluxed side of the sheet is left bare sporadic pick up of zinc occurs which is considered unsatisfactory where.