PHOSPHATING SOLUTION FOR PRETREATMENT OF CORRODED TRANSMISSION TOWERS BEFORE PAINTING

The hot-dip galvanized layer of transmission towers usually becomes rusty after a long running time.Through analyzing the mechanism of rust conversion and zinc phosphating,a kind of phosphating solution has been developed,which can convert the rust and zinc phosphate at the same time.The key components CUT-051 of rust conversion and CUT-052 of inhibitor for zinc have been determined.The phosphating solution can form phosphate film on the rusty surface of metal so that it can be used as antirust agent of painting.